asm6.go 118 KB
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// Inferno utils/6l/span.c
// http://code.google.com/p/inferno-os/source/browse/utils/6l/span.c
//
//	Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
//	Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
//	Portions Copyright © 1997-1999 Vita Nuova Limited
//	Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
//	Portions Copyright © 2004,2006 Bruce Ellis
//	Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
//	Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
//	Portions Copyright © 2009 The Go Authors.  All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package x86

import (
	"cmd/internal/obj"
	"fmt"
	"log"
	"strings"
)

// Instruction layout.

const (
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	MaxAlign = 32 // max data alignment

	// Loop alignment constants:
	// want to align loop entry to LoopAlign-byte boundary,
	// and willing to insert at most MaxLoopPad bytes of NOP to do so.
	// We define a loop entry as the target of a backward jump.
	//
	// gcc uses MaxLoopPad = 10 for its 'generic x86-64' config,
	// and it aligns all jump targets, not just backward jump targets.
	//
	// As of 6/1/2012, the effect of setting MaxLoopPad = 10 here
	// is very slight but negative, so the alignment is disabled by
	// setting MaxLoopPad = 0. The code is here for reference and
	// for future experiments.
	//
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	LoopAlign  = 16
	MaxLoopPad = 0
	FuncAlign  = 16
)

type Optab struct {
	as     int16
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	ytab   []ytab
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	prefix uint8
	op     [23]uint8
}

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type ytab struct {
	from    uint8
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	from3   uint8
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	to      uint8
	zcase   uint8
	zoffset uint8
}

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type Movtab struct {
	as   int16
	ft   uint8
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	f3t  uint8
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	tt   uint8
	code uint8
	op   [4]uint8
}

const (
88
	Yxxx = iota
89
	Ynone
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	Yi0 // $0
	Yi1 // $1
	Yi8 // $x, x fits in int8
	Yu8 // $x, x fits in uint8
	Yu7 // $x, x in 0..127 (fits in both int8 and uint8)
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	Ys32
	Yi32
	Yi64
	Yiauto
	Yal
	Ycl
	Yax
	Ycx
	Yrb
	Yrl
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	Yrl32 // Yrl on 32-bit system
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	Yrf
	Yf0
	Yrx
	Ymb
	Yml
	Ym
	Ybr
	Ycs
	Yss
	Yds
	Yes
	Yfs
	Ygs
	Ygdtr
	Yidtr
	Yldtr
	Ymsw
	Ytask
	Ycr0
	Ycr1
	Ycr2
	Ycr3
	Ycr4
	Ycr5
	Ycr6
	Ycr7
	Ycr8
	Ydr0
	Ydr1
	Ydr2
	Ydr3
	Ydr4
	Ydr5
	Ydr6
	Ydr7
	Ytr0
	Ytr1
	Ytr2
	Ytr3
	Ytr4
	Ytr5
	Ytr6
	Ytr7
	Ymr
	Ymm
	Yxr
	Yxm
	Ytls
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	Ytextsize
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	Yindir
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	Ymax
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)

const (
	Zxxx = iota
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	Zlit
	Zlitm_r
	Z_rp
	Zbr
	Zcall
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	Zcallcon
	Zcallind
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	Zcallindreg
	Zib_
	Zib_rp
	Zibo_m
	Zibo_m_xm
	Zil_
	Zil_rp
	Ziq_rp
	Zilo_m
	Ziqo_m
	Zjmp
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	Zjmpcon
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	Zloop
	Zo_iw
	Zm_o
	Zm_r
	Zm2_r
	Zm_r_xm
	Zm_r_i_xm
	Zm_r_3d
	Zm_r_xm_nr
	Zr_m_xm_nr
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	Zibm_r /* mmx1,mmx2/mem64,imm8 */
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	Zmb_r
	Zaut_r
	Zo_m
	Zo_m64
	Zpseudo
	Zr_m
	Zr_m_xm
	Zrp_
	Z_ib
	Z_il
	Zm_ibo
	Zm_ilo
	Zib_rr
	Zil_rr
	Zclr
	Zbyte
	Zmax
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)

const (
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	Px  = 0
	Px1 = 1    // symbolic; exact value doesn't matter
	P32 = 0x32 /* 32-bit only */
	Pe  = 0x66 /* operand escape */
	Pm  = 0x0f /* 2byte opcode escape */
	Pq  = 0xff /* both escapes: 66 0f */
	Pb  = 0xfe /* byte operands */
	Pf2 = 0xf2 /* xmm escape 1: f2 0f */
	Pf3 = 0xf3 /* xmm escape 2: f3 0f */
	Pq3 = 0x67 /* xmm escape 3: 66 48 0f */
	Pw  = 0x48 /* Rex.w */
	Pw8 = 0x90 // symbolic; exact value doesn't matter
	Py  = 0x80 /* defaults to 64-bit mode */
	Py1 = 0x81 // symbolic; exact value doesn't matter
	Py3 = 0x83 // symbolic; exact value doesn't matter

	Rxf = 1 << 9 /* internal flag for Rxr on from */
	Rxt = 1 << 8 /* internal flag for Rxr on to */
	Rxw = 1 << 3 /* =1, 64-bit operand size */
	Rxr = 1 << 2 /* extend modrm reg */
	Rxx = 1 << 1 /* extend sib index */
	Rxb = 1 << 0 /* extend modrm r/m, sib base, or opcode reg */

	Maxand = 10 /* in -a output width of the byte codes */
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)

var ycover [Ymax * Ymax]uint8

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var reg [MAXREG]int
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var regrex [MAXREG + 1]int
242

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var ynone = []ytab{
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	{Ynone, Ynone, Ynone, Zlit, 1},
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}

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var ysahf = []ytab{
	{Ynone, Ynone, Ynone, Zlit, 2},
	{Ynone, Ynone, Ynone, Zlit, 1},
}

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var ytext = []ytab{
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	{Ymb, Ynone, Ytextsize, Zpseudo, 0},
	{Ymb, Yi32, Ytextsize, Zpseudo, 1},
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}

var ynop = []ytab{
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	{Ynone, Ynone, Ynone, Zpseudo, 0},
	{Ynone, Ynone, Yiauto, Zpseudo, 0},
	{Ynone, Ynone, Yml, Zpseudo, 0},
	{Ynone, Ynone, Yrf, Zpseudo, 0},
	{Ynone, Ynone, Yxr, Zpseudo, 0},
	{Yiauto, Ynone, Ynone, Zpseudo, 0},
	{Yml, Ynone, Ynone, Zpseudo, 0},
	{Yrf, Ynone, Ynone, Zpseudo, 0},
	{Yxr, Ynone, Ynone, Zpseudo, 1},
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}

var yfuncdata = []ytab{
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	{Yi32, Ynone, Ym, Zpseudo, 0},
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}

var ypcdata = []ytab{
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	{Yi32, Ynone, Yi32, Zpseudo, 0},
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}

var yxorb = []ytab{
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	{Yi32, Ynone, Yal, Zib_, 1},
	{Yi32, Ynone, Ymb, Zibo_m, 2},
	{Yrb, Ynone, Ymb, Zr_m, 1},
	{Ymb, Ynone, Yrb, Zm_r, 1},
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}

var yxorl = []ytab{
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	{Yi8, Ynone, Yml, Zibo_m, 2},
	{Yi32, Ynone, Yax, Zil_, 1},
	{Yi32, Ynone, Yml, Zilo_m, 2},
	{Yrl, Ynone, Yml, Zr_m, 1},
	{Yml, Ynone, Yrl, Zm_r, 1},
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}

var yaddl = []ytab{
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	{Yi8, Ynone, Yml, Zibo_m, 2},
	{Yi32, Ynone, Yax, Zil_, 1},
	{Yi32, Ynone, Yml, Zilo_m, 2},
	{Yrl, Ynone, Yml, Zr_m, 1},
	{Yml, Ynone, Yrl, Zm_r, 1},
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}

var yincb = []ytab{
301
	{Ynone, Ynone, Ymb, Zo_m, 2},
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}

var yincw = []ytab{
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	{Ynone, Ynone, Yml, Zo_m, 2},
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}

var yincl = []ytab{
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	{Ynone, Ynone, Yrl, Z_rp, 1},
	{Ynone, Ynone, Yml, Zo_m, 2},
}

var yincq = []ytab{
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	{Ynone, Ynone, Yml, Zo_m, 2},
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}

var ycmpb = []ytab{
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	{Yal, Ynone, Yi32, Z_ib, 1},
	{Ymb, Ynone, Yi32, Zm_ibo, 2},
	{Ymb, Ynone, Yrb, Zm_r, 1},
	{Yrb, Ynone, Ymb, Zr_m, 1},
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}

var ycmpl = []ytab{
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	{Yml, Ynone, Yi8, Zm_ibo, 2},
	{Yax, Ynone, Yi32, Z_il, 1},
	{Yml, Ynone, Yi32, Zm_ilo, 2},
	{Yml, Ynone, Yrl, Zm_r, 1},
	{Yrl, Ynone, Yml, Zr_m, 1},
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}

var yshb = []ytab{
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	{Yi1, Ynone, Ymb, Zo_m, 2},
	{Yi32, Ynone, Ymb, Zibo_m, 2},
	{Ycx, Ynone, Ymb, Zo_m, 2},
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}

var yshl = []ytab{
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	{Yi1, Ynone, Yml, Zo_m, 2},
	{Yi32, Ynone, Yml, Zibo_m, 2},
	{Ycl, Ynone, Yml, Zo_m, 2},
	{Ycx, Ynone, Yml, Zo_m, 2},
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}

var ytestb = []ytab{
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	{Yi32, Ynone, Yal, Zib_, 1},
	{Yi32, Ynone, Ymb, Zibo_m, 2},
	{Yrb, Ynone, Ymb, Zr_m, 1},
	{Ymb, Ynone, Yrb, Zm_r, 1},
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}

var ytestl = []ytab{
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	{Yi32, Ynone, Yax, Zil_, 1},
	{Yi32, Ynone, Yml, Zilo_m, 2},
	{Yrl, Ynone, Yml, Zr_m, 1},
	{Yml, Ynone, Yrl, Zm_r, 1},
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}

var ymovb = []ytab{
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	{Yrb, Ynone, Ymb, Zr_m, 1},
	{Ymb, Ynone, Yrb, Zm_r, 1},
	{Yi32, Ynone, Yrb, Zib_rp, 1},
	{Yi32, Ynone, Ymb, Zibo_m, 2},
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}

var ymbs = []ytab{
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	{Ymb, Ynone, Ynone, Zm_o, 2},
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}

var ybtl = []ytab{
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	{Yi8, Ynone, Yml, Zibo_m, 2},
	{Yrl, Ynone, Yml, Zr_m, 1},
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}

var ymovw = []ytab{
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	{Yrl, Ynone, Yml, Zr_m, 1},
	{Yml, Ynone, Yrl, Zm_r, 1},
	{Yi0, Ynone, Yrl, Zclr, 1},
	{Yi32, Ynone, Yrl, Zil_rp, 1},
	{Yi32, Ynone, Yml, Zilo_m, 2},
	{Yiauto, Ynone, Yrl, Zaut_r, 2},
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}

var ymovl = []ytab{
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	{Yrl, Ynone, Yml, Zr_m, 1},
	{Yml, Ynone, Yrl, Zm_r, 1},
	{Yi0, Ynone, Yrl, Zclr, 1},
	{Yi32, Ynone, Yrl, Zil_rp, 1},
	{Yi32, Ynone, Yml, Zilo_m, 2},
	{Yml, Ynone, Ymr, Zm_r_xm, 1}, // MMX MOVD
	{Ymr, Ynone, Yml, Zr_m_xm, 1}, // MMX MOVD
	{Yml, Ynone, Yxr, Zm_r_xm, 2}, // XMM MOVD (32 bit)
	{Yxr, Ynone, Yml, Zr_m_xm, 2}, // XMM MOVD (32 bit)
	{Yiauto, Ynone, Yrl, Zaut_r, 2},
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}

var yret = []ytab{
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	{Ynone, Ynone, Ynone, Zo_iw, 1},
	{Yi32, Ynone, Ynone, Zo_iw, 1},
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}

var ymovq = []ytab{
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	// valid in 32-bit mode
	{Ym, Ynone, Ymr, Zm_r_xm_nr, 1},  // 0x6f MMX MOVQ (shorter encoding)
	{Ymr, Ynone, Ym, Zr_m_xm_nr, 1},  // 0x7f MMX MOVQ
	{Yxr, Ynone, Ymr, Zm_r_xm_nr, 2}, // Pf2, 0xd6 MOVDQ2Q
	{Yxm, Ynone, Yxr, Zm_r_xm_nr, 2}, // Pf3, 0x7e MOVQ xmm1/m64 -> xmm2
	{Yxr, Ynone, Yxm, Zr_m_xm_nr, 2}, // Pe, 0xd6 MOVQ xmm1 -> xmm2/m64

	// valid only in 64-bit mode, usually with 64-bit prefix
	{Yrl, Ynone, Yml, Zr_m, 1},      // 0x89
	{Yml, Ynone, Yrl, Zm_r, 1},      // 0x8b
	{Yi0, Ynone, Yrl, Zclr, 1},      // 0x31
	{Ys32, Ynone, Yrl, Zilo_m, 2},   // 32 bit signed 0xc7,(0)
	{Yi64, Ynone, Yrl, Ziq_rp, 1},   // 0xb8 -- 32/64 bit immediate
	{Yi32, Ynone, Yml, Zilo_m, 2},   // 0xc7,(0)
	{Ymm, Ynone, Ymr, Zm_r_xm, 1},   // 0x6e MMX MOVD
	{Ymr, Ynone, Ymm, Zr_m_xm, 1},   // 0x7e MMX MOVD
	{Yml, Ynone, Yxr, Zm_r_xm, 2},   // Pe, 0x6e MOVD xmm load
	{Yxr, Ynone, Yml, Zr_m_xm, 2},   // Pe, 0x7e MOVD xmm store
	{Yiauto, Ynone, Yrl, Zaut_r, 1}, // 0 built-in LEAQ
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}

var ym_rl = []ytab{
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	{Ym, Ynone, Yrl, Zm_r, 1},
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}

var yrl_m = []ytab{
429
	{Yrl, Ynone, Ym, Zr_m, 1},
430 431 432
}

var ymb_rl = []ytab{
433
	{Ymb, Ynone, Yrl, Zmb_r, 1},
434 435 436
}

var yml_rl = []ytab{
437
	{Yml, Ynone, Yrl, Zm_r, 1},
438 439 440
}

var yrl_ml = []ytab{
441
	{Yrl, Ynone, Yml, Zr_m, 1},
442 443 444
}

var yml_mb = []ytab{
445 446
	{Yrb, Ynone, Ymb, Zr_m, 1},
	{Ymb, Ynone, Yrb, Zm_r, 1},
447 448 449
}

var yrb_mb = []ytab{
450
	{Yrb, Ynone, Ymb, Zr_m, 1},
451 452 453
}

var yxchg = []ytab{
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	{Yax, Ynone, Yrl, Z_rp, 1},
	{Yrl, Ynone, Yax, Zrp_, 1},
	{Yrl, Ynone, Yml, Zr_m, 1},
	{Yml, Ynone, Yrl, Zm_r, 1},
458 459 460
}

var ydivl = []ytab{
461
	{Yml, Ynone, Ynone, Zm_o, 2},
462 463 464
}

var ydivb = []ytab{
465
	{Ymb, Ynone, Ynone, Zm_o, 2},
466 467 468
}

var yimul = []ytab{
469 470 471 472
	{Yml, Ynone, Ynone, Zm_o, 2},
	{Yi8, Ynone, Yrl, Zib_rr, 1},
	{Yi32, Ynone, Yrl, Zil_rr, 1},
	{Yml, Ynone, Yrl, Zm_r, 2},
473 474 475
}

var yimul3 = []ytab{
476
	{Yi8, Yml, Yrl, Zibm_r, 2},
477 478 479
}

var ybyte = []ytab{
480
	{Yi64, Ynone, Ynone, Zbyte, 1},
481 482 483
}

var yin = []ytab{
484 485
	{Yi32, Ynone, Ynone, Zib_, 1},
	{Ynone, Ynone, Ynone, Zlit, 1},
486 487 488
}

var yint = []ytab{
489
	{Yi32, Ynone, Ynone, Zib_, 1},
490 491 492
}

var ypushl = []ytab{
493 494 495 496
	{Yrl, Ynone, Ynone, Zrp_, 1},
	{Ym, Ynone, Ynone, Zm_o, 2},
	{Yi8, Ynone, Ynone, Zib_, 1},
	{Yi32, Ynone, Ynone, Zil_, 1},
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}

var ypopl = []ytab{
500 501
	{Ynone, Ynone, Yrl, Z_rp, 1},
	{Ynone, Ynone, Ym, Zo_m, 2},
502 503 504
}

var ybswap = []ytab{
505
	{Ynone, Ynone, Yrl, Z_rp, 2},
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}

var yscond = []ytab{
509
	{Ynone, Ynone, Ymb, Zo_m, 2},
510 511 512
}

var yjcond = []ytab{
513 514 515
	{Ynone, Ynone, Ybr, Zbr, 0},
	{Yi0, Ynone, Ybr, Zbr, 0},
	{Yi1, Ynone, Ybr, Zbr, 1},
516 517 518
}

var yloop = []ytab{
519
	{Ynone, Ynone, Ybr, Zloop, 1},
520 521 522
}

var ycall = []ytab{
523 524
	{Ynone, Ynone, Yml, Zcallindreg, 0},
	{Yrx, Ynone, Yrx, Zcallindreg, 2},
525 526 527
	{Ynone, Ynone, Yindir, Zcallind, 2},
	{Ynone, Ynone, Ybr, Zcall, 0},
	{Ynone, Ynone, Yi32, Zcallcon, 1},
528 529 530
}

var yduff = []ytab{
531
	{Ynone, Ynone, Yi32, Zcall, 1},
532 533 534
}

var yjmp = []ytab{
535
	{Ynone, Ynone, Yml, Zo_m64, 2},
536 537
	{Ynone, Ynone, Ybr, Zjmp, 0},
	{Ynone, Ynone, Yi32, Zjmpcon, 1},
538 539 540
}

var yfmvd = []ytab{
541 542 543 544
	{Ym, Ynone, Yf0, Zm_o, 2},
	{Yf0, Ynone, Ym, Zo_m, 2},
	{Yrf, Ynone, Yf0, Zm_o, 2},
	{Yf0, Ynone, Yrf, Zo_m, 2},
545 546 547
}

var yfmvdp = []ytab{
548 549
	{Yf0, Ynone, Ym, Zo_m, 2},
	{Yf0, Ynone, Yrf, Zo_m, 2},
550 551 552
}

var yfmvf = []ytab{
553 554
	{Ym, Ynone, Yf0, Zm_o, 2},
	{Yf0, Ynone, Ym, Zo_m, 2},
555 556 557
}

var yfmvx = []ytab{
558
	{Ym, Ynone, Yf0, Zm_o, 2},
559 560 561
}

var yfmvp = []ytab{
562
	{Yf0, Ynone, Ym, Zo_m, 2},
563 564
}

565 566 567 568
var yfcmv = []ytab{
	{Yrf, Ynone, Yf0, Zm_o, 2},
}

569
var yfadd = []ytab{
570 571 572
	{Ym, Ynone, Yf0, Zm_o, 2},
	{Yrf, Ynone, Yf0, Zm_o, 2},
	{Yf0, Ynone, Yrf, Zo_m, 2},
573 574 575
}

var yfaddp = []ytab{
576
	{Yf0, Ynone, Yrf, Zo_m, 2},
577 578 579
}

var yfxch = []ytab{
580 581
	{Yf0, Ynone, Yrf, Zo_m, 2},
	{Yrf, Ynone, Yf0, Zm_o, 2},
582 583 584
}

var ycompp = []ytab{
585
	{Yf0, Ynone, Yrf, Zo_m, 2}, /* botch is really f0,f1 */
586 587 588
}

var ystsw = []ytab{
589 590
	{Ynone, Ynone, Ym, Zo_m, 2},
	{Ynone, Ynone, Yax, Zlit, 1},
591 592 593
}

var ystcw = []ytab{
594 595
	{Ynone, Ynone, Ym, Zo_m, 2},
	{Ym, Ynone, Ynone, Zm_o, 2},
596 597 598
}

var ysvrs = []ytab{
599 600
	{Ynone, Ynone, Ym, Zo_m, 2},
	{Ym, Ynone, Ynone, Zm_o, 2},
601 602 603
}

var ymm = []ytab{
604 605
	{Ymm, Ynone, Ymr, Zm_r_xm, 1},
	{Yxm, Ynone, Yxr, Zm_r_xm, 2},
606 607 608
}

var yxm = []ytab{
609
	{Yxm, Ynone, Yxr, Zm_r_xm, 1},
610 611 612
}

var yxcvm1 = []ytab{
613 614
	{Yxm, Ynone, Yxr, Zm_r_xm, 2},
	{Yxm, Ynone, Ymr, Zm_r_xm, 2},
615 616 617
}

var yxcvm2 = []ytab{
618 619
	{Yxm, Ynone, Yxr, Zm_r_xm, 2},
	{Ymm, Ynone, Yxr, Zm_r_xm, 2},
620 621 622
}

/*
623
var yxmq = []ytab{
624
	{Yxm, Ynone, Yxr, Zm_r_xm, 2},
625
}
626 627
*/

628
var yxr = []ytab{
629
	{Yxr, Ynone, Yxr, Zm_r_xm, 1},
630 631 632
}

var yxr_ml = []ytab{
633
	{Yxr, Ynone, Yml, Zr_m_xm, 1},
634 635 636
}

var ymr = []ytab{
637
	{Ymr, Ynone, Ymr, Zm_r, 1},
638 639 640
}

var ymr_ml = []ytab{
641
	{Ymr, Ynone, Yml, Zr_m_xm, 1},
642 643 644
}

var yxcmp = []ytab{
645
	{Yxm, Ynone, Yxr, Zm_r_xm, 1},
646 647 648
}

var yxcmpi = []ytab{
649
	{Yxm, Yxr, Yi8, Zm_r_i_xm, 2},
650 651 652
}

var yxmov = []ytab{
653 654
	{Yxm, Ynone, Yxr, Zm_r_xm, 1},
	{Yxr, Ynone, Yxm, Zr_m_xm, 1},
655 656 657
}

var yxcvfl = []ytab{
658
	{Yxm, Ynone, Yrl, Zm_r_xm, 1},
659 660 661
}

var yxcvlf = []ytab{
662
	{Yml, Ynone, Yxr, Zm_r_xm, 1},
663 664 665
}

var yxcvfq = []ytab{
666
	{Yxm, Ynone, Yrl, Zm_r_xm, 2},
667 668 669
}

var yxcvqf = []ytab{
670
	{Yml, Ynone, Yxr, Zm_r_xm, 2},
671 672 673
}

var yps = []ytab{
674 675 676 677
	{Ymm, Ynone, Ymr, Zm_r_xm, 1},
	{Yi8, Ynone, Ymr, Zibo_m_xm, 2},
	{Yxm, Ynone, Yxr, Zm_r_xm, 2},
	{Yi8, Ynone, Yxr, Zibo_m_xm, 3},
678 679 680
}

var yxrrl = []ytab{
681
	{Yxr, Ynone, Yrl, Zm_r, 1},
682 683 684
}

var ymfp = []ytab{
685
	{Ymm, Ynone, Ymr, Zm_r_3d, 1},
686 687 688
}

var ymrxr = []ytab{
689 690
	{Ymr, Ynone, Yxr, Zm_r, 1},
	{Yxm, Ynone, Yxr, Zm_r_xm, 1},
691
}
692

693
var ymshuf = []ytab{
694
	{Yi8, Ymm, Ymr, Zibm_r, 2},
695 696
}

697
var ymshufb = []ytab{
698
	{Yxm, Ynone, Yxr, Zm2_r, 2},
699 700
}

701
var yxshuf = []ytab{
702
	{Yu8, Yxm, Yxr, Zibm_r, 2},
703 704 705
}

var yextrw = []ytab{
706
	{Yu8, Yxr, Yrl, Zibm_r, 2},
707 708 709
}

var yinsrw = []ytab{
710
	{Yu8, Yml, Yxr, Zibm_r, 2},
711 712 713
}

var yinsr = []ytab{
714
	{Yu8, Ymm, Yxr, Zibm_r, 3},
715 716 717
}

var ypsdq = []ytab{
718
	{Yi8, Ynone, Yxr, Zibo_m, 2},
719 720 721
}

var ymskb = []ytab{
722 723
	{Yxr, Ynone, Yrl, Zm_r_xm, 2},
	{Ymr, Ynone, Yrl, Zm_r_xm, 1},
724 725 726
}

var ycrc32l = []ytab{
727
	{Yml, Ynone, Yrl, Zlitm_r, 0},
728 729 730
}

var yprefetch = []ytab{
731
	{Ym, Ynone, Ynone, Zm_o, 2},
732 733 734
}

var yaes = []ytab{
735
	{Yxm, Ynone, Yxr, Zlitm_r, 2},
736 737 738
}

var yaes2 = []ytab{
739
	{Yu8, Yxm, Yxr, Zibm_r, 2},
740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802
}

/*
 * You are doasm, holding in your hand a Prog* with p->as set to, say, ACRC32,
 * and p->from and p->to as operands (Addr*).  The linker scans optab to find
 * the entry with the given p->as and then looks through the ytable for that
 * instruction (the second field in the optab struct) for a line whose first
 * two values match the Ytypes of the p->from and p->to operands.  The function
 * oclass in span.c computes the specific Ytype of an operand and then the set
 * of more general Ytypes that it satisfies is implied by the ycover table, set
 * up in instinit.  For example, oclass distinguishes the constants 0 and 1
 * from the more general 8-bit constants, but instinit says
 *
 *        ycover[Yi0*Ymax + Ys32] = 1;
 *        ycover[Yi1*Ymax + Ys32] = 1;
 *        ycover[Yi8*Ymax + Ys32] = 1;
 *
 * which means that Yi0, Yi1, and Yi8 all count as Ys32 (signed 32)
 * if that's what an instruction can handle.
 *
 * In parallel with the scan through the ytable for the appropriate line, there
 * is a z pointer that starts out pointing at the strange magic byte list in
 * the Optab struct.  With each step past a non-matching ytable line, z
 * advances by the 4th entry in the line.  When a matching line is found, that
 * z pointer has the extra data to use in laying down the instruction bytes.
 * The actual bytes laid down are a function of the 3rd entry in the line (that
 * is, the Ztype) and the z bytes.
 *
 * For example, let's look at AADDL.  The optab line says:
 *        { AADDL,        yaddl,  Px, 0x83,(00),0x05,0x81,(00),0x01,0x03 },
 *
 * and yaddl says
 *        uchar   yaddl[] =
 *        {
 *                Yi8,    Yml,    Zibo_m, 2,
 *                Yi32,   Yax,    Zil_,   1,
 *                Yi32,   Yml,    Zilo_m, 2,
 *                Yrl,    Yml,    Zr_m,   1,
 *                Yml,    Yrl,    Zm_r,   1,
 *                0
 *        };
 *
 * so there are 5 possible types of ADDL instruction that can be laid down, and
 * possible states used to lay them down (Ztype and z pointer, assuming z
 * points at {0x83,(00),0x05,0x81,(00),0x01,0x03}) are:
 *
 *        Yi8, Yml -> Zibo_m, z (0x83, 00)
 *        Yi32, Yax -> Zil_, z+2 (0x05)
 *        Yi32, Yml -> Zilo_m, z+2+1 (0x81, 0x00)
 *        Yrl, Yml -> Zr_m, z+2+1+2 (0x01)
 *        Yml, Yrl -> Zm_r, z+2+1+2+1 (0x03)
 *
 * The Pconstant in the optab line controls the prefix bytes to emit.  That's
 * relatively straightforward as this program goes.
 *
 * The switch on t[2] in doasm implements the various Z cases.  Zibo_m, for
 * example, is an opcode byte (z[0]) then an asmando (which is some kind of
 * encoded addressing mode for the Yml arg), and then a single immediate byte.
 * Zilo_m is the same but a long (32-bit) immediate.
 */
var optab =
/*	as, ytab, andproto, opcode */
[]Optab{
803
	Optab{obj.AXXX, nil, 0, [23]uint8{}},
804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852
	Optab{AAAA, ynone, P32, [23]uint8{0x37}},
	Optab{AAAD, ynone, P32, [23]uint8{0xd5, 0x0a}},
	Optab{AAAM, ynone, P32, [23]uint8{0xd4, 0x0a}},
	Optab{AAAS, ynone, P32, [23]uint8{0x3f}},
	Optab{AADCB, yxorb, Pb, [23]uint8{0x14, 0x80, 02, 0x10, 0x10}},
	Optab{AADCL, yxorl, Px, [23]uint8{0x83, 02, 0x15, 0x81, 02, 0x11, 0x13}},
	Optab{AADCQ, yxorl, Pw, [23]uint8{0x83, 02, 0x15, 0x81, 02, 0x11, 0x13}},
	Optab{AADCW, yxorl, Pe, [23]uint8{0x83, 02, 0x15, 0x81, 02, 0x11, 0x13}},
	Optab{AADDB, yxorb, Pb, [23]uint8{0x04, 0x80, 00, 0x00, 0x02}},
	Optab{AADDL, yaddl, Px, [23]uint8{0x83, 00, 0x05, 0x81, 00, 0x01, 0x03}},
	Optab{AADDPD, yxm, Pq, [23]uint8{0x58}},
	Optab{AADDPS, yxm, Pm, [23]uint8{0x58}},
	Optab{AADDQ, yaddl, Pw, [23]uint8{0x83, 00, 0x05, 0x81, 00, 0x01, 0x03}},
	Optab{AADDSD, yxm, Pf2, [23]uint8{0x58}},
	Optab{AADDSS, yxm, Pf3, [23]uint8{0x58}},
	Optab{AADDW, yaddl, Pe, [23]uint8{0x83, 00, 0x05, 0x81, 00, 0x01, 0x03}},
	Optab{AADJSP, nil, 0, [23]uint8{}},
	Optab{AANDB, yxorb, Pb, [23]uint8{0x24, 0x80, 04, 0x20, 0x22}},
	Optab{AANDL, yxorl, Px, [23]uint8{0x83, 04, 0x25, 0x81, 04, 0x21, 0x23}},
	Optab{AANDNPD, yxm, Pq, [23]uint8{0x55}},
	Optab{AANDNPS, yxm, Pm, [23]uint8{0x55}},
	Optab{AANDPD, yxm, Pq, [23]uint8{0x54}},
	Optab{AANDPS, yxm, Pq, [23]uint8{0x54}},
	Optab{AANDQ, yxorl, Pw, [23]uint8{0x83, 04, 0x25, 0x81, 04, 0x21, 0x23}},
	Optab{AANDW, yxorl, Pe, [23]uint8{0x83, 04, 0x25, 0x81, 04, 0x21, 0x23}},
	Optab{AARPL, yrl_ml, P32, [23]uint8{0x63}},
	Optab{ABOUNDL, yrl_m, P32, [23]uint8{0x62}},
	Optab{ABOUNDW, yrl_m, Pe, [23]uint8{0x62}},
	Optab{ABSFL, yml_rl, Pm, [23]uint8{0xbc}},
	Optab{ABSFQ, yml_rl, Pw, [23]uint8{0x0f, 0xbc}},
	Optab{ABSFW, yml_rl, Pq, [23]uint8{0xbc}},
	Optab{ABSRL, yml_rl, Pm, [23]uint8{0xbd}},
	Optab{ABSRQ, yml_rl, Pw, [23]uint8{0x0f, 0xbd}},
	Optab{ABSRW, yml_rl, Pq, [23]uint8{0xbd}},
	Optab{ABSWAPL, ybswap, Px, [23]uint8{0x0f, 0xc8}},
	Optab{ABSWAPQ, ybswap, Pw, [23]uint8{0x0f, 0xc8}},
	Optab{ABTCL, ybtl, Pm, [23]uint8{0xba, 07, 0xbb}},
	Optab{ABTCQ, ybtl, Pw, [23]uint8{0x0f, 0xba, 07, 0x0f, 0xbb}},
	Optab{ABTCW, ybtl, Pq, [23]uint8{0xba, 07, 0xbb}},
	Optab{ABTL, ybtl, Pm, [23]uint8{0xba, 04, 0xa3}},
	Optab{ABTQ, ybtl, Pw, [23]uint8{0x0f, 0xba, 04, 0x0f, 0xa3}},
	Optab{ABTRL, ybtl, Pm, [23]uint8{0xba, 06, 0xb3}},
	Optab{ABTRQ, ybtl, Pw, [23]uint8{0x0f, 0xba, 06, 0x0f, 0xb3}},
	Optab{ABTRW, ybtl, Pq, [23]uint8{0xba, 06, 0xb3}},
	Optab{ABTSL, ybtl, Pm, [23]uint8{0xba, 05, 0xab}},
	Optab{ABTSQ, ybtl, Pw, [23]uint8{0x0f, 0xba, 05, 0x0f, 0xab}},
	Optab{ABTSW, ybtl, Pq, [23]uint8{0xba, 05, 0xab}},
	Optab{ABTW, ybtl, Pq, [23]uint8{0xba, 04, 0xa3}},
	Optab{ABYTE, ybyte, Px, [23]uint8{1}},
853
	Optab{obj.ACALL, ycall, Px, [23]uint8{0xff, 02, 0xff, 0x15, 0xe8}},
854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949
	Optab{ACDQ, ynone, Px, [23]uint8{0x99}},
	Optab{ACLC, ynone, Px, [23]uint8{0xf8}},
	Optab{ACLD, ynone, Px, [23]uint8{0xfc}},
	Optab{ACLI, ynone, Px, [23]uint8{0xfa}},
	Optab{ACLTS, ynone, Pm, [23]uint8{0x06}},
	Optab{ACMC, ynone, Px, [23]uint8{0xf5}},
	Optab{ACMOVLCC, yml_rl, Pm, [23]uint8{0x43}},
	Optab{ACMOVLCS, yml_rl, Pm, [23]uint8{0x42}},
	Optab{ACMOVLEQ, yml_rl, Pm, [23]uint8{0x44}},
	Optab{ACMOVLGE, yml_rl, Pm, [23]uint8{0x4d}},
	Optab{ACMOVLGT, yml_rl, Pm, [23]uint8{0x4f}},
	Optab{ACMOVLHI, yml_rl, Pm, [23]uint8{0x47}},
	Optab{ACMOVLLE, yml_rl, Pm, [23]uint8{0x4e}},
	Optab{ACMOVLLS, yml_rl, Pm, [23]uint8{0x46}},
	Optab{ACMOVLLT, yml_rl, Pm, [23]uint8{0x4c}},
	Optab{ACMOVLMI, yml_rl, Pm, [23]uint8{0x48}},
	Optab{ACMOVLNE, yml_rl, Pm, [23]uint8{0x45}},
	Optab{ACMOVLOC, yml_rl, Pm, [23]uint8{0x41}},
	Optab{ACMOVLOS, yml_rl, Pm, [23]uint8{0x40}},
	Optab{ACMOVLPC, yml_rl, Pm, [23]uint8{0x4b}},
	Optab{ACMOVLPL, yml_rl, Pm, [23]uint8{0x49}},
	Optab{ACMOVLPS, yml_rl, Pm, [23]uint8{0x4a}},
	Optab{ACMOVQCC, yml_rl, Pw, [23]uint8{0x0f, 0x43}},
	Optab{ACMOVQCS, yml_rl, Pw, [23]uint8{0x0f, 0x42}},
	Optab{ACMOVQEQ, yml_rl, Pw, [23]uint8{0x0f, 0x44}},
	Optab{ACMOVQGE, yml_rl, Pw, [23]uint8{0x0f, 0x4d}},
	Optab{ACMOVQGT, yml_rl, Pw, [23]uint8{0x0f, 0x4f}},
	Optab{ACMOVQHI, yml_rl, Pw, [23]uint8{0x0f, 0x47}},
	Optab{ACMOVQLE, yml_rl, Pw, [23]uint8{0x0f, 0x4e}},
	Optab{ACMOVQLS, yml_rl, Pw, [23]uint8{0x0f, 0x46}},
	Optab{ACMOVQLT, yml_rl, Pw, [23]uint8{0x0f, 0x4c}},
	Optab{ACMOVQMI, yml_rl, Pw, [23]uint8{0x0f, 0x48}},
	Optab{ACMOVQNE, yml_rl, Pw, [23]uint8{0x0f, 0x45}},
	Optab{ACMOVQOC, yml_rl, Pw, [23]uint8{0x0f, 0x41}},
	Optab{ACMOVQOS, yml_rl, Pw, [23]uint8{0x0f, 0x40}},
	Optab{ACMOVQPC, yml_rl, Pw, [23]uint8{0x0f, 0x4b}},
	Optab{ACMOVQPL, yml_rl, Pw, [23]uint8{0x0f, 0x49}},
	Optab{ACMOVQPS, yml_rl, Pw, [23]uint8{0x0f, 0x4a}},
	Optab{ACMOVWCC, yml_rl, Pq, [23]uint8{0x43}},
	Optab{ACMOVWCS, yml_rl, Pq, [23]uint8{0x42}},
	Optab{ACMOVWEQ, yml_rl, Pq, [23]uint8{0x44}},
	Optab{ACMOVWGE, yml_rl, Pq, [23]uint8{0x4d}},
	Optab{ACMOVWGT, yml_rl, Pq, [23]uint8{0x4f}},
	Optab{ACMOVWHI, yml_rl, Pq, [23]uint8{0x47}},
	Optab{ACMOVWLE, yml_rl, Pq, [23]uint8{0x4e}},
	Optab{ACMOVWLS, yml_rl, Pq, [23]uint8{0x46}},
	Optab{ACMOVWLT, yml_rl, Pq, [23]uint8{0x4c}},
	Optab{ACMOVWMI, yml_rl, Pq, [23]uint8{0x48}},
	Optab{ACMOVWNE, yml_rl, Pq, [23]uint8{0x45}},
	Optab{ACMOVWOC, yml_rl, Pq, [23]uint8{0x41}},
	Optab{ACMOVWOS, yml_rl, Pq, [23]uint8{0x40}},
	Optab{ACMOVWPC, yml_rl, Pq, [23]uint8{0x4b}},
	Optab{ACMOVWPL, yml_rl, Pq, [23]uint8{0x49}},
	Optab{ACMOVWPS, yml_rl, Pq, [23]uint8{0x4a}},
	Optab{ACMPB, ycmpb, Pb, [23]uint8{0x3c, 0x80, 07, 0x38, 0x3a}},
	Optab{ACMPL, ycmpl, Px, [23]uint8{0x83, 07, 0x3d, 0x81, 07, 0x39, 0x3b}},
	Optab{ACMPPD, yxcmpi, Px, [23]uint8{Pe, 0xc2}},
	Optab{ACMPPS, yxcmpi, Pm, [23]uint8{0xc2, 0}},
	Optab{ACMPQ, ycmpl, Pw, [23]uint8{0x83, 07, 0x3d, 0x81, 07, 0x39, 0x3b}},
	Optab{ACMPSB, ynone, Pb, [23]uint8{0xa6}},
	Optab{ACMPSD, yxcmpi, Px, [23]uint8{Pf2, 0xc2}},
	Optab{ACMPSL, ynone, Px, [23]uint8{0xa7}},
	Optab{ACMPSQ, ynone, Pw, [23]uint8{0xa7}},
	Optab{ACMPSS, yxcmpi, Px, [23]uint8{Pf3, 0xc2}},
	Optab{ACMPSW, ynone, Pe, [23]uint8{0xa7}},
	Optab{ACMPW, ycmpl, Pe, [23]uint8{0x83, 07, 0x3d, 0x81, 07, 0x39, 0x3b}},
	Optab{ACOMISD, yxcmp, Pe, [23]uint8{0x2f}},
	Optab{ACOMISS, yxcmp, Pm, [23]uint8{0x2f}},
	Optab{ACPUID, ynone, Pm, [23]uint8{0xa2}},
	Optab{ACVTPL2PD, yxcvm2, Px, [23]uint8{Pf3, 0xe6, Pe, 0x2a}},
	Optab{ACVTPL2PS, yxcvm2, Pm, [23]uint8{0x5b, 0, 0x2a, 0}},
	Optab{ACVTPD2PL, yxcvm1, Px, [23]uint8{Pf2, 0xe6, Pe, 0x2d}},
	Optab{ACVTPD2PS, yxm, Pe, [23]uint8{0x5a}},
	Optab{ACVTPS2PL, yxcvm1, Px, [23]uint8{Pe, 0x5b, Pm, 0x2d}},
	Optab{ACVTPS2PD, yxm, Pm, [23]uint8{0x5a}},
	Optab{API2FW, ymfp, Px, [23]uint8{0x0c}},
	Optab{ACVTSD2SL, yxcvfl, Pf2, [23]uint8{0x2d}},
	Optab{ACVTSD2SQ, yxcvfq, Pw, [23]uint8{Pf2, 0x2d}},
	Optab{ACVTSD2SS, yxm, Pf2, [23]uint8{0x5a}},
	Optab{ACVTSL2SD, yxcvlf, Pf2, [23]uint8{0x2a}},
	Optab{ACVTSQ2SD, yxcvqf, Pw, [23]uint8{Pf2, 0x2a}},
	Optab{ACVTSL2SS, yxcvlf, Pf3, [23]uint8{0x2a}},
	Optab{ACVTSQ2SS, yxcvqf, Pw, [23]uint8{Pf3, 0x2a}},
	Optab{ACVTSS2SD, yxm, Pf3, [23]uint8{0x5a}},
	Optab{ACVTSS2SL, yxcvfl, Pf3, [23]uint8{0x2d}},
	Optab{ACVTSS2SQ, yxcvfq, Pw, [23]uint8{Pf3, 0x2d}},
	Optab{ACVTTPD2PL, yxcvm1, Px, [23]uint8{Pe, 0xe6, Pe, 0x2c}},
	Optab{ACVTTPS2PL, yxcvm1, Px, [23]uint8{Pf3, 0x5b, Pm, 0x2c}},
	Optab{ACVTTSD2SL, yxcvfl, Pf2, [23]uint8{0x2c}},
	Optab{ACVTTSD2SQ, yxcvfq, Pw, [23]uint8{Pf2, 0x2c}},
	Optab{ACVTTSS2SL, yxcvfl, Pf3, [23]uint8{0x2c}},
	Optab{ACVTTSS2SQ, yxcvfq, Pw, [23]uint8{Pf3, 0x2c}},
	Optab{ACWD, ynone, Pe, [23]uint8{0x99}},
	Optab{ACQO, ynone, Pw, [23]uint8{0x99}},
	Optab{ADAA, ynone, P32, [23]uint8{0x27}},
	Optab{ADAS, ynone, P32, [23]uint8{0x2f}},
950
	Optab{obj.ADATA, nil, 0, [23]uint8{}},
951
	Optab{ADECB, yincb, Pb, [23]uint8{0xfe, 01}},
952 953
	Optab{ADECL, yincl, Px1, [23]uint8{0x48, 0xff, 01}},
	Optab{ADECQ, yincq, Pw, [23]uint8{0xff, 01}},
954 955 956 957 958 959 960 961 962 963 964 965 966 967 968
	Optab{ADECW, yincw, Pe, [23]uint8{0xff, 01}},
	Optab{ADIVB, ydivb, Pb, [23]uint8{0xf6, 06}},
	Optab{ADIVL, ydivl, Px, [23]uint8{0xf7, 06}},
	Optab{ADIVPD, yxm, Pe, [23]uint8{0x5e}},
	Optab{ADIVPS, yxm, Pm, [23]uint8{0x5e}},
	Optab{ADIVQ, ydivl, Pw, [23]uint8{0xf7, 06}},
	Optab{ADIVSD, yxm, Pf2, [23]uint8{0x5e}},
	Optab{ADIVSS, yxm, Pf3, [23]uint8{0x5e}},
	Optab{ADIVW, ydivl, Pe, [23]uint8{0xf7, 06}},
	Optab{AEMMS, ynone, Pm, [23]uint8{0x77}},
	Optab{AENTER, nil, 0, [23]uint8{}}, /* botch */
	Optab{AFXRSTOR, ysvrs, Pm, [23]uint8{0xae, 01, 0xae, 01}},
	Optab{AFXSAVE, ysvrs, Pm, [23]uint8{0xae, 00, 0xae, 00}},
	Optab{AFXRSTOR64, ysvrs, Pw, [23]uint8{0x0f, 0xae, 01, 0x0f, 0xae, 01}},
	Optab{AFXSAVE64, ysvrs, Pw, [23]uint8{0x0f, 0xae, 00, 0x0f, 0xae, 00}},
969
	Optab{obj.AGLOBL, nil, 0, [23]uint8{}},
970 971 972 973 974 975 976 977 978 979 980 981
	Optab{AHLT, ynone, Px, [23]uint8{0xf4}},
	Optab{AIDIVB, ydivb, Pb, [23]uint8{0xf6, 07}},
	Optab{AIDIVL, ydivl, Px, [23]uint8{0xf7, 07}},
	Optab{AIDIVQ, ydivl, Pw, [23]uint8{0xf7, 07}},
	Optab{AIDIVW, ydivl, Pe, [23]uint8{0xf7, 07}},
	Optab{AIMULB, ydivb, Pb, [23]uint8{0xf6, 05}},
	Optab{AIMULL, yimul, Px, [23]uint8{0xf7, 05, 0x6b, 0x69, Pm, 0xaf}},
	Optab{AIMULQ, yimul, Pw, [23]uint8{0xf7, 05, 0x6b, 0x69, Pm, 0xaf}},
	Optab{AIMULW, yimul, Pe, [23]uint8{0xf7, 05, 0x6b, 0x69, Pm, 0xaf}},
	Optab{AIMUL3Q, yimul3, Pw, [23]uint8{0x6b, 00}},
	Optab{AINB, yin, Pb, [23]uint8{0xe4, 0xec}},
	Optab{AINCB, yincb, Pb, [23]uint8{0xfe, 00}},
982 983
	Optab{AINCL, yincl, Px1, [23]uint8{0x40, 0xff, 00}},
	Optab{AINCQ, yincq, Pw, [23]uint8{0xff, 00}},
984 985 986 987 988 989 990 991 992 993 994 995 996 997
	Optab{AINCW, yincw, Pe, [23]uint8{0xff, 00}},
	Optab{AINL, yin, Px, [23]uint8{0xe5, 0xed}},
	Optab{AINSB, ynone, Pb, [23]uint8{0x6c}},
	Optab{AINSL, ynone, Px, [23]uint8{0x6d}},
	Optab{AINSW, ynone, Pe, [23]uint8{0x6d}},
	Optab{AINT, yint, Px, [23]uint8{0xcd}},
	Optab{AINTO, ynone, P32, [23]uint8{0xce}},
	Optab{AINW, yin, Pe, [23]uint8{0xe5, 0xed}},
	Optab{AIRETL, ynone, Px, [23]uint8{0xcf}},
	Optab{AIRETQ, ynone, Pw, [23]uint8{0xcf}},
	Optab{AIRETW, ynone, Pe, [23]uint8{0xcf}},
	Optab{AJCC, yjcond, Px, [23]uint8{0x73, 0x83, 00}},
	Optab{AJCS, yjcond, Px, [23]uint8{0x72, 0x82}},
	Optab{AJCXZL, yloop, Px, [23]uint8{0xe3}},
998
	Optab{AJCXZW, yloop, Px, [23]uint8{0xe3}},
999 1000 1001 1002 1003 1004 1005 1006 1007
	Optab{AJCXZQ, yloop, Px, [23]uint8{0xe3}},
	Optab{AJEQ, yjcond, Px, [23]uint8{0x74, 0x84}},
	Optab{AJGE, yjcond, Px, [23]uint8{0x7d, 0x8d}},
	Optab{AJGT, yjcond, Px, [23]uint8{0x7f, 0x8f}},
	Optab{AJHI, yjcond, Px, [23]uint8{0x77, 0x87}},
	Optab{AJLE, yjcond, Px, [23]uint8{0x7e, 0x8e}},
	Optab{AJLS, yjcond, Px, [23]uint8{0x76, 0x86}},
	Optab{AJLT, yjcond, Px, [23]uint8{0x7c, 0x8c}},
	Optab{AJMI, yjcond, Px, [23]uint8{0x78, 0x88}},
1008
	Optab{obj.AJMP, yjmp, Px, [23]uint8{0xff, 04, 0xeb, 0xe9}},
1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071
	Optab{AJNE, yjcond, Px, [23]uint8{0x75, 0x85}},
	Optab{AJOC, yjcond, Px, [23]uint8{0x71, 0x81, 00}},
	Optab{AJOS, yjcond, Px, [23]uint8{0x70, 0x80, 00}},
	Optab{AJPC, yjcond, Px, [23]uint8{0x7b, 0x8b}},
	Optab{AJPL, yjcond, Px, [23]uint8{0x79, 0x89}},
	Optab{AJPS, yjcond, Px, [23]uint8{0x7a, 0x8a}},
	Optab{ALAHF, ynone, Px, [23]uint8{0x9f}},
	Optab{ALARL, yml_rl, Pm, [23]uint8{0x02}},
	Optab{ALARW, yml_rl, Pq, [23]uint8{0x02}},
	Optab{ALDMXCSR, ysvrs, Pm, [23]uint8{0xae, 02, 0xae, 02}},
	Optab{ALEAL, ym_rl, Px, [23]uint8{0x8d}},
	Optab{ALEAQ, ym_rl, Pw, [23]uint8{0x8d}},
	Optab{ALEAVEL, ynone, P32, [23]uint8{0xc9}},
	Optab{ALEAVEQ, ynone, Py, [23]uint8{0xc9}},
	Optab{ALEAVEW, ynone, Pe, [23]uint8{0xc9}},
	Optab{ALEAW, ym_rl, Pe, [23]uint8{0x8d}},
	Optab{ALOCK, ynone, Px, [23]uint8{0xf0}},
	Optab{ALODSB, ynone, Pb, [23]uint8{0xac}},
	Optab{ALODSL, ynone, Px, [23]uint8{0xad}},
	Optab{ALODSQ, ynone, Pw, [23]uint8{0xad}},
	Optab{ALODSW, ynone, Pe, [23]uint8{0xad}},
	Optab{ALONG, ybyte, Px, [23]uint8{4}},
	Optab{ALOOP, yloop, Px, [23]uint8{0xe2}},
	Optab{ALOOPEQ, yloop, Px, [23]uint8{0xe1}},
	Optab{ALOOPNE, yloop, Px, [23]uint8{0xe0}},
	Optab{ALSLL, yml_rl, Pm, [23]uint8{0x03}},
	Optab{ALSLW, yml_rl, Pq, [23]uint8{0x03}},
	Optab{AMASKMOVOU, yxr, Pe, [23]uint8{0xf7}},
	Optab{AMASKMOVQ, ymr, Pm, [23]uint8{0xf7}},
	Optab{AMAXPD, yxm, Pe, [23]uint8{0x5f}},
	Optab{AMAXPS, yxm, Pm, [23]uint8{0x5f}},
	Optab{AMAXSD, yxm, Pf2, [23]uint8{0x5f}},
	Optab{AMAXSS, yxm, Pf3, [23]uint8{0x5f}},
	Optab{AMINPD, yxm, Pe, [23]uint8{0x5d}},
	Optab{AMINPS, yxm, Pm, [23]uint8{0x5d}},
	Optab{AMINSD, yxm, Pf2, [23]uint8{0x5d}},
	Optab{AMINSS, yxm, Pf3, [23]uint8{0x5d}},
	Optab{AMOVAPD, yxmov, Pe, [23]uint8{0x28, 0x29}},
	Optab{AMOVAPS, yxmov, Pm, [23]uint8{0x28, 0x29}},
	Optab{AMOVB, ymovb, Pb, [23]uint8{0x88, 0x8a, 0xb0, 0xc6, 00}},
	Optab{AMOVBLSX, ymb_rl, Pm, [23]uint8{0xbe}},
	Optab{AMOVBLZX, ymb_rl, Pm, [23]uint8{0xb6}},
	Optab{AMOVBQSX, ymb_rl, Pw, [23]uint8{0x0f, 0xbe}},
	Optab{AMOVBQZX, ymb_rl, Pm, [23]uint8{0xb6}},
	Optab{AMOVBWSX, ymb_rl, Pq, [23]uint8{0xbe}},
	Optab{AMOVBWZX, ymb_rl, Pq, [23]uint8{0xb6}},
	Optab{AMOVO, yxmov, Pe, [23]uint8{0x6f, 0x7f}},
	Optab{AMOVOU, yxmov, Pf3, [23]uint8{0x6f, 0x7f}},
	Optab{AMOVHLPS, yxr, Pm, [23]uint8{0x12}},
	Optab{AMOVHPD, yxmov, Pe, [23]uint8{0x16, 0x17}},
	Optab{AMOVHPS, yxmov, Pm, [23]uint8{0x16, 0x17}},
	Optab{AMOVL, ymovl, Px, [23]uint8{0x89, 0x8b, 0x31, 0xb8, 0xc7, 00, 0x6e, 0x7e, Pe, 0x6e, Pe, 0x7e, 0}},
	Optab{AMOVLHPS, yxr, Pm, [23]uint8{0x16}},
	Optab{AMOVLPD, yxmov, Pe, [23]uint8{0x12, 0x13}},
	Optab{AMOVLPS, yxmov, Pm, [23]uint8{0x12, 0x13}},
	Optab{AMOVLQSX, yml_rl, Pw, [23]uint8{0x63}},
	Optab{AMOVLQZX, yml_rl, Px, [23]uint8{0x8b}},
	Optab{AMOVMSKPD, yxrrl, Pq, [23]uint8{0x50}},
	Optab{AMOVMSKPS, yxrrl, Pm, [23]uint8{0x50}},
	Optab{AMOVNTO, yxr_ml, Pe, [23]uint8{0xe7}},
	Optab{AMOVNTPD, yxr_ml, Pe, [23]uint8{0x2b}},
	Optab{AMOVNTPS, yxr_ml, Pm, [23]uint8{0x2b}},
	Optab{AMOVNTQ, ymr_ml, Pm, [23]uint8{0xe7}},
1072
	Optab{AMOVQ, ymovq, Pw8, [23]uint8{0x6f, 0x7f, Pf2, 0xd6, Pf3, 0x7e, Pe, 0xd6, 0x89, 0x8b, 0x31, 0xc7, 00, 0xb8, 0xc7, 00, 0x6e, 0x7e, Pe, 0x6e, Pe, 0x7e, 0}},
1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098
	Optab{AMOVQOZX, ymrxr, Pf3, [23]uint8{0xd6, 0x7e}},
	Optab{AMOVSB, ynone, Pb, [23]uint8{0xa4}},
	Optab{AMOVSD, yxmov, Pf2, [23]uint8{0x10, 0x11}},
	Optab{AMOVSL, ynone, Px, [23]uint8{0xa5}},
	Optab{AMOVSQ, ynone, Pw, [23]uint8{0xa5}},
	Optab{AMOVSS, yxmov, Pf3, [23]uint8{0x10, 0x11}},
	Optab{AMOVSW, ynone, Pe, [23]uint8{0xa5}},
	Optab{AMOVUPD, yxmov, Pe, [23]uint8{0x10, 0x11}},
	Optab{AMOVUPS, yxmov, Pm, [23]uint8{0x10, 0x11}},
	Optab{AMOVW, ymovw, Pe, [23]uint8{0x89, 0x8b, 0x31, 0xb8, 0xc7, 00, 0}},
	Optab{AMOVWLSX, yml_rl, Pm, [23]uint8{0xbf}},
	Optab{AMOVWLZX, yml_rl, Pm, [23]uint8{0xb7}},
	Optab{AMOVWQSX, yml_rl, Pw, [23]uint8{0x0f, 0xbf}},
	Optab{AMOVWQZX, yml_rl, Pw, [23]uint8{0x0f, 0xb7}},
	Optab{AMULB, ydivb, Pb, [23]uint8{0xf6, 04}},
	Optab{AMULL, ydivl, Px, [23]uint8{0xf7, 04}},
	Optab{AMULPD, yxm, Pe, [23]uint8{0x59}},
	Optab{AMULPS, yxm, Ym, [23]uint8{0x59}},
	Optab{AMULQ, ydivl, Pw, [23]uint8{0xf7, 04}},
	Optab{AMULSD, yxm, Pf2, [23]uint8{0x59}},
	Optab{AMULSS, yxm, Pf3, [23]uint8{0x59}},
	Optab{AMULW, ydivl, Pe, [23]uint8{0xf7, 04}},
	Optab{ANEGB, yscond, Pb, [23]uint8{0xf6, 03}},
	Optab{ANEGL, yscond, Px, [23]uint8{0xf7, 03}},
	Optab{ANEGQ, yscond, Pw, [23]uint8{0xf7, 03}},
	Optab{ANEGW, yscond, Pe, [23]uint8{0xf7, 03}},
1099
	Optab{obj.ANOP, ynop, Px, [23]uint8{0, 0}},
1100
	Optab{ANOTB, yscond, Pb, [23]uint8{0xf6, 02}},
1101
	Optab{ANOTL, yscond, Px, [23]uint8{0xf7, 02}}, // TODO(rsc): yscond is wrong here.
1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115
	Optab{ANOTQ, yscond, Pw, [23]uint8{0xf7, 02}},
	Optab{ANOTW, yscond, Pe, [23]uint8{0xf7, 02}},
	Optab{AORB, yxorb, Pb, [23]uint8{0x0c, 0x80, 01, 0x08, 0x0a}},
	Optab{AORL, yxorl, Px, [23]uint8{0x83, 01, 0x0d, 0x81, 01, 0x09, 0x0b}},
	Optab{AORPD, yxm, Pq, [23]uint8{0x56}},
	Optab{AORPS, yxm, Pm, [23]uint8{0x56}},
	Optab{AORQ, yxorl, Pw, [23]uint8{0x83, 01, 0x0d, 0x81, 01, 0x09, 0x0b}},
	Optab{AORW, yxorl, Pe, [23]uint8{0x83, 01, 0x0d, 0x81, 01, 0x09, 0x0b}},
	Optab{AOUTB, yin, Pb, [23]uint8{0xe6, 0xee}},
	Optab{AOUTL, yin, Px, [23]uint8{0xe7, 0xef}},
	Optab{AOUTSB, ynone, Pb, [23]uint8{0x6e}},
	Optab{AOUTSL, ynone, Px, [23]uint8{0x6f}},
	Optab{AOUTSW, ynone, Pe, [23]uint8{0x6f}},
	Optab{AOUTW, yin, Pe, [23]uint8{0xe7, 0xef}},
1116 1117 1118 1119 1120
	Optab{APACKSSLW, ymm, Py1, [23]uint8{0x6b, Pe, 0x6b}},
	Optab{APACKSSWB, ymm, Py1, [23]uint8{0x63, Pe, 0x63}},
	Optab{APACKUSWB, ymm, Py1, [23]uint8{0x67, Pe, 0x67}},
	Optab{APADDB, ymm, Py1, [23]uint8{0xfc, Pe, 0xfc}},
	Optab{APADDL, ymm, Py1, [23]uint8{0xfe, Pe, 0xfe}},
1121
	Optab{APADDQ, yxm, Pe, [23]uint8{0xd4}},
1122 1123 1124 1125 1126 1127 1128
	Optab{APADDSB, ymm, Py1, [23]uint8{0xec, Pe, 0xec}},
	Optab{APADDSW, ymm, Py1, [23]uint8{0xed, Pe, 0xed}},
	Optab{APADDUSB, ymm, Py1, [23]uint8{0xdc, Pe, 0xdc}},
	Optab{APADDUSW, ymm, Py1, [23]uint8{0xdd, Pe, 0xdd}},
	Optab{APADDW, ymm, Py1, [23]uint8{0xfd, Pe, 0xfd}},
	Optab{APAND, ymm, Py1, [23]uint8{0xdb, Pe, 0xdb}},
	Optab{APANDN, ymm, Py1, [23]uint8{0xdf, Pe, 0xdf}},
1129
	Optab{APAUSE, ynone, Px, [23]uint8{0xf3, 0x90}},
1130 1131 1132 1133 1134 1135 1136 1137
	Optab{APAVGB, ymm, Py1, [23]uint8{0xe0, Pe, 0xe0}},
	Optab{APAVGW, ymm, Py1, [23]uint8{0xe3, Pe, 0xe3}},
	Optab{APCMPEQB, ymm, Py1, [23]uint8{0x74, Pe, 0x74}},
	Optab{APCMPEQL, ymm, Py1, [23]uint8{0x76, Pe, 0x76}},
	Optab{APCMPEQW, ymm, Py1, [23]uint8{0x75, Pe, 0x75}},
	Optab{APCMPGTB, ymm, Py1, [23]uint8{0x64, Pe, 0x64}},
	Optab{APCMPGTL, ymm, Py1, [23]uint8{0x66, Pe, 0x66}},
	Optab{APCMPGTW, ymm, Py1, [23]uint8{0x65, Pe, 0x65}},
1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161
	Optab{APEXTRW, yextrw, Pq, [23]uint8{0xc5, 00}},
	Optab{APF2IL, ymfp, Px, [23]uint8{0x1d}},
	Optab{APF2IW, ymfp, Px, [23]uint8{0x1c}},
	Optab{API2FL, ymfp, Px, [23]uint8{0x0d}},
	Optab{APFACC, ymfp, Px, [23]uint8{0xae}},
	Optab{APFADD, ymfp, Px, [23]uint8{0x9e}},
	Optab{APFCMPEQ, ymfp, Px, [23]uint8{0xb0}},
	Optab{APFCMPGE, ymfp, Px, [23]uint8{0x90}},
	Optab{APFCMPGT, ymfp, Px, [23]uint8{0xa0}},
	Optab{APFMAX, ymfp, Px, [23]uint8{0xa4}},
	Optab{APFMIN, ymfp, Px, [23]uint8{0x94}},
	Optab{APFMUL, ymfp, Px, [23]uint8{0xb4}},
	Optab{APFNACC, ymfp, Px, [23]uint8{0x8a}},
	Optab{APFPNACC, ymfp, Px, [23]uint8{0x8e}},
	Optab{APFRCP, ymfp, Px, [23]uint8{0x96}},
	Optab{APFRCPIT1, ymfp, Px, [23]uint8{0xa6}},
	Optab{APFRCPI2T, ymfp, Px, [23]uint8{0xb6}},
	Optab{APFRSQIT1, ymfp, Px, [23]uint8{0xa7}},
	Optab{APFRSQRT, ymfp, Px, [23]uint8{0x97}},
	Optab{APFSUB, ymfp, Px, [23]uint8{0x9a}},
	Optab{APFSUBR, ymfp, Px, [23]uint8{0xaa}},
	Optab{APINSRW, yinsrw, Pq, [23]uint8{0xc4, 00}},
	Optab{APINSRD, yinsr, Pq, [23]uint8{0x3a, 0x22, 00}},
	Optab{APINSRQ, yinsr, Pq3, [23]uint8{0x3a, 0x22, 00}},
1162
	Optab{APMADDWL, ymm, Py1, [23]uint8{0xf5, Pe, 0xf5}},
1163 1164 1165 1166 1167 1168
	Optab{APMAXSW, yxm, Pe, [23]uint8{0xee}},
	Optab{APMAXUB, yxm, Pe, [23]uint8{0xde}},
	Optab{APMINSW, yxm, Pe, [23]uint8{0xea}},
	Optab{APMINUB, yxm, Pe, [23]uint8{0xda}},
	Optab{APMOVMSKB, ymskb, Px, [23]uint8{Pe, 0xd7, 0xd7}},
	Optab{APMULHRW, ymfp, Px, [23]uint8{0xb7}},
1169 1170 1171 1172
	Optab{APMULHUW, ymm, Py1, [23]uint8{0xe4, Pe, 0xe4}},
	Optab{APMULHW, ymm, Py1, [23]uint8{0xe5, Pe, 0xe5}},
	Optab{APMULLW, ymm, Py1, [23]uint8{0xd5, Pe, 0xd5}},
	Optab{APMULULQ, ymm, Py1, [23]uint8{0xf4, Pe, 0xf4}},
1173 1174 1175 1176 1177 1178 1179 1180
	Optab{APOPAL, ynone, P32, [23]uint8{0x61}},
	Optab{APOPAW, ynone, Pe, [23]uint8{0x61}},
	Optab{APOPFL, ynone, P32, [23]uint8{0x9d}},
	Optab{APOPFQ, ynone, Py, [23]uint8{0x9d}},
	Optab{APOPFW, ynone, Pe, [23]uint8{0x9d}},
	Optab{APOPL, ypopl, P32, [23]uint8{0x58, 0x8f, 00}},
	Optab{APOPQ, ypopl, Py, [23]uint8{0x58, 0x8f, 00}},
	Optab{APOPW, ypopl, Pe, [23]uint8{0x58, 0x8f, 00}},
1181
	Optab{APOR, ymm, Py1, [23]uint8{0xeb, Pe, 0xeb}},
1182 1183 1184 1185 1186 1187 1188
	Optab{APSADBW, yxm, Pq, [23]uint8{0xf6}},
	Optab{APSHUFHW, yxshuf, Pf3, [23]uint8{0x70, 00}},
	Optab{APSHUFL, yxshuf, Pq, [23]uint8{0x70, 00}},
	Optab{APSHUFLW, yxshuf, Pf2, [23]uint8{0x70, 00}},
	Optab{APSHUFW, ymshuf, Pm, [23]uint8{0x70, 00}},
	Optab{APSHUFB, ymshufb, Pq, [23]uint8{0x38, 0x00}},
	Optab{APSLLO, ypsdq, Pq, [23]uint8{0x73, 07}},
1189 1190 1191 1192 1193
	Optab{APSLLL, yps, Py3, [23]uint8{0xf2, 0x72, 06, Pe, 0xf2, Pe, 0x72, 06}},
	Optab{APSLLQ, yps, Py3, [23]uint8{0xf3, 0x73, 06, Pe, 0xf3, Pe, 0x73, 06}},
	Optab{APSLLW, yps, Py3, [23]uint8{0xf1, 0x71, 06, Pe, 0xf1, Pe, 0x71, 06}},
	Optab{APSRAL, yps, Py3, [23]uint8{0xe2, 0x72, 04, Pe, 0xe2, Pe, 0x72, 04}},
	Optab{APSRAW, yps, Py3, [23]uint8{0xe1, 0x71, 04, Pe, 0xe1, Pe, 0x71, 04}},
1194
	Optab{APSRLO, ypsdq, Pq, [23]uint8{0x73, 03}},
1195 1196 1197
	Optab{APSRLL, yps, Py3, [23]uint8{0xd2, 0x72, 02, Pe, 0xd2, Pe, 0x72, 02}},
	Optab{APSRLQ, yps, Py3, [23]uint8{0xd3, 0x73, 02, Pe, 0xd3, Pe, 0x73, 02}},
	Optab{APSRLW, yps, Py3, [23]uint8{0xd1, 0x71, 02, Pe, 0xe1, Pe, 0x71, 02}},
1198 1199 1200 1201 1202 1203 1204 1205 1206
	Optab{APSUBB, yxm, Pe, [23]uint8{0xf8}},
	Optab{APSUBL, yxm, Pe, [23]uint8{0xfa}},
	Optab{APSUBQ, yxm, Pe, [23]uint8{0xfb}},
	Optab{APSUBSB, yxm, Pe, [23]uint8{0xe8}},
	Optab{APSUBSW, yxm, Pe, [23]uint8{0xe9}},
	Optab{APSUBUSB, yxm, Pe, [23]uint8{0xd8}},
	Optab{APSUBUSW, yxm, Pe, [23]uint8{0xd9}},
	Optab{APSUBW, yxm, Pe, [23]uint8{0xf9}},
	Optab{APSWAPL, ymfp, Px, [23]uint8{0xbb}},
1207 1208
	Optab{APUNPCKHBW, ymm, Py1, [23]uint8{0x68, Pe, 0x68}},
	Optab{APUNPCKHLQ, ymm, Py1, [23]uint8{0x6a, Pe, 0x6a}},
1209
	Optab{APUNPCKHQDQ, yxm, Pe, [23]uint8{0x6d}},
1210 1211 1212
	Optab{APUNPCKHWL, ymm, Py1, [23]uint8{0x69, Pe, 0x69}},
	Optab{APUNPCKLBW, ymm, Py1, [23]uint8{0x60, Pe, 0x60}},
	Optab{APUNPCKLLQ, ymm, Py1, [23]uint8{0x62, Pe, 0x62}},
1213
	Optab{APUNPCKLQDQ, yxm, Pe, [23]uint8{0x6c}},
1214
	Optab{APUNPCKLWL, ymm, Py1, [23]uint8{0x61, Pe, 0x61}},
1215 1216 1217 1218 1219 1220 1221 1222
	Optab{APUSHAL, ynone, P32, [23]uint8{0x60}},
	Optab{APUSHAW, ynone, Pe, [23]uint8{0x60}},
	Optab{APUSHFL, ynone, P32, [23]uint8{0x9c}},
	Optab{APUSHFQ, ynone, Py, [23]uint8{0x9c}},
	Optab{APUSHFW, ynone, Pe, [23]uint8{0x9c}},
	Optab{APUSHL, ypushl, P32, [23]uint8{0x50, 0xff, 06, 0x6a, 0x68}},
	Optab{APUSHQ, ypushl, Py, [23]uint8{0x50, 0xff, 06, 0x6a, 0x68}},
	Optab{APUSHW, ypushl, Pe, [23]uint8{0x50, 0xff, 06, 0x6a, 0x68}},
1223
	Optab{APXOR, ymm, Py1, [23]uint8{0xef, Pe, 0xef}},
1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236
	Optab{AQUAD, ybyte, Px, [23]uint8{8}},
	Optab{ARCLB, yshb, Pb, [23]uint8{0xd0, 02, 0xc0, 02, 0xd2, 02}},
	Optab{ARCLL, yshl, Px, [23]uint8{0xd1, 02, 0xc1, 02, 0xd3, 02, 0xd3, 02}},
	Optab{ARCLQ, yshl, Pw, [23]uint8{0xd1, 02, 0xc1, 02, 0xd3, 02, 0xd3, 02}},
	Optab{ARCLW, yshl, Pe, [23]uint8{0xd1, 02, 0xc1, 02, 0xd3, 02, 0xd3, 02}},
	Optab{ARCPPS, yxm, Pm, [23]uint8{0x53}},
	Optab{ARCPSS, yxm, Pf3, [23]uint8{0x53}},
	Optab{ARCRB, yshb, Pb, [23]uint8{0xd0, 03, 0xc0, 03, 0xd2, 03}},
	Optab{ARCRL, yshl, Px, [23]uint8{0xd1, 03, 0xc1, 03, 0xd3, 03, 0xd3, 03}},
	Optab{ARCRQ, yshl, Pw, [23]uint8{0xd1, 03, 0xc1, 03, 0xd3, 03, 0xd3, 03}},
	Optab{ARCRW, yshl, Pe, [23]uint8{0xd1, 03, 0xc1, 03, 0xd3, 03, 0xd3, 03}},
	Optab{AREP, ynone, Px, [23]uint8{0xf3}},
	Optab{AREPN, ynone, Px, [23]uint8{0xf2}},
1237
	Optab{obj.ARET, ynone, Px, [23]uint8{0xc3}},
1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250
	Optab{ARETFW, yret, Pe, [23]uint8{0xcb, 0xca}},
	Optab{ARETFL, yret, Px, [23]uint8{0xcb, 0xca}},
	Optab{ARETFQ, yret, Pw, [23]uint8{0xcb, 0xca}},
	Optab{AROLB, yshb, Pb, [23]uint8{0xd0, 00, 0xc0, 00, 0xd2, 00}},
	Optab{AROLL, yshl, Px, [23]uint8{0xd1, 00, 0xc1, 00, 0xd3, 00, 0xd3, 00}},
	Optab{AROLQ, yshl, Pw, [23]uint8{0xd1, 00, 0xc1, 00, 0xd3, 00, 0xd3, 00}},
	Optab{AROLW, yshl, Pe, [23]uint8{0xd1, 00, 0xc1, 00, 0xd3, 00, 0xd3, 00}},
	Optab{ARORB, yshb, Pb, [23]uint8{0xd0, 01, 0xc0, 01, 0xd2, 01}},
	Optab{ARORL, yshl, Px, [23]uint8{0xd1, 01, 0xc1, 01, 0xd3, 01, 0xd3, 01}},
	Optab{ARORQ, yshl, Pw, [23]uint8{0xd1, 01, 0xc1, 01, 0xd3, 01, 0xd3, 01}},
	Optab{ARORW, yshl, Pe, [23]uint8{0xd1, 01, 0xc1, 01, 0xd3, 01, 0xd3, 01}},
	Optab{ARSQRTPS, yxm, Pm, [23]uint8{0x52}},
	Optab{ARSQRTSS, yxm, Pf3, [23]uint8{0x52}},
1251
	Optab{ASAHF, ynone, Px1, [23]uint8{0x9e, 00, 0x86, 0xe0, 0x50, 0x9d}}, /* XCHGB AH,AL; PUSH AX; POPFL */
1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319
	Optab{ASALB, yshb, Pb, [23]uint8{0xd0, 04, 0xc0, 04, 0xd2, 04}},
	Optab{ASALL, yshl, Px, [23]uint8{0xd1, 04, 0xc1, 04, 0xd3, 04, 0xd3, 04}},
	Optab{ASALQ, yshl, Pw, [23]uint8{0xd1, 04, 0xc1, 04, 0xd3, 04, 0xd3, 04}},
	Optab{ASALW, yshl, Pe, [23]uint8{0xd1, 04, 0xc1, 04, 0xd3, 04, 0xd3, 04}},
	Optab{ASARB, yshb, Pb, [23]uint8{0xd0, 07, 0xc0, 07, 0xd2, 07}},
	Optab{ASARL, yshl, Px, [23]uint8{0xd1, 07, 0xc1, 07, 0xd3, 07, 0xd3, 07}},
	Optab{ASARQ, yshl, Pw, [23]uint8{0xd1, 07, 0xc1, 07, 0xd3, 07, 0xd3, 07}},
	Optab{ASARW, yshl, Pe, [23]uint8{0xd1, 07, 0xc1, 07, 0xd3, 07, 0xd3, 07}},
	Optab{ASBBB, yxorb, Pb, [23]uint8{0x1c, 0x80, 03, 0x18, 0x1a}},
	Optab{ASBBL, yxorl, Px, [23]uint8{0x83, 03, 0x1d, 0x81, 03, 0x19, 0x1b}},
	Optab{ASBBQ, yxorl, Pw, [23]uint8{0x83, 03, 0x1d, 0x81, 03, 0x19, 0x1b}},
	Optab{ASBBW, yxorl, Pe, [23]uint8{0x83, 03, 0x1d, 0x81, 03, 0x19, 0x1b}},
	Optab{ASCASB, ynone, Pb, [23]uint8{0xae}},
	Optab{ASCASL, ynone, Px, [23]uint8{0xaf}},
	Optab{ASCASQ, ynone, Pw, [23]uint8{0xaf}},
	Optab{ASCASW, ynone, Pe, [23]uint8{0xaf}},
	Optab{ASETCC, yscond, Pb, [23]uint8{0x0f, 0x93, 00}},
	Optab{ASETCS, yscond, Pb, [23]uint8{0x0f, 0x92, 00}},
	Optab{ASETEQ, yscond, Pb, [23]uint8{0x0f, 0x94, 00}},
	Optab{ASETGE, yscond, Pb, [23]uint8{0x0f, 0x9d, 00}},
	Optab{ASETGT, yscond, Pb, [23]uint8{0x0f, 0x9f, 00}},
	Optab{ASETHI, yscond, Pb, [23]uint8{0x0f, 0x97, 00}},
	Optab{ASETLE, yscond, Pb, [23]uint8{0x0f, 0x9e, 00}},
	Optab{ASETLS, yscond, Pb, [23]uint8{0x0f, 0x96, 00}},
	Optab{ASETLT, yscond, Pb, [23]uint8{0x0f, 0x9c, 00}},
	Optab{ASETMI, yscond, Pb, [23]uint8{0x0f, 0x98, 00}},
	Optab{ASETNE, yscond, Pb, [23]uint8{0x0f, 0x95, 00}},
	Optab{ASETOC, yscond, Pb, [23]uint8{0x0f, 0x91, 00}},
	Optab{ASETOS, yscond, Pb, [23]uint8{0x0f, 0x90, 00}},
	Optab{ASETPC, yscond, Pb, [23]uint8{0x0f, 0x9b, 00}},
	Optab{ASETPL, yscond, Pb, [23]uint8{0x0f, 0x99, 00}},
	Optab{ASETPS, yscond, Pb, [23]uint8{0x0f, 0x9a, 00}},
	Optab{ASHLB, yshb, Pb, [23]uint8{0xd0, 04, 0xc0, 04, 0xd2, 04}},
	Optab{ASHLL, yshl, Px, [23]uint8{0xd1, 04, 0xc1, 04, 0xd3, 04, 0xd3, 04}},
	Optab{ASHLQ, yshl, Pw, [23]uint8{0xd1, 04, 0xc1, 04, 0xd3, 04, 0xd3, 04}},
	Optab{ASHLW, yshl, Pe, [23]uint8{0xd1, 04, 0xc1, 04, 0xd3, 04, 0xd3, 04}},
	Optab{ASHRB, yshb, Pb, [23]uint8{0xd0, 05, 0xc0, 05, 0xd2, 05}},
	Optab{ASHRL, yshl, Px, [23]uint8{0xd1, 05, 0xc1, 05, 0xd3, 05, 0xd3, 05}},
	Optab{ASHRQ, yshl, Pw, [23]uint8{0xd1, 05, 0xc1, 05, 0xd3, 05, 0xd3, 05}},
	Optab{ASHRW, yshl, Pe, [23]uint8{0xd1, 05, 0xc1, 05, 0xd3, 05, 0xd3, 05}},
	Optab{ASHUFPD, yxshuf, Pq, [23]uint8{0xc6, 00}},
	Optab{ASHUFPS, yxshuf, Pm, [23]uint8{0xc6, 00}},
	Optab{ASQRTPD, yxm, Pe, [23]uint8{0x51}},
	Optab{ASQRTPS, yxm, Pm, [23]uint8{0x51}},
	Optab{ASQRTSD, yxm, Pf2, [23]uint8{0x51}},
	Optab{ASQRTSS, yxm, Pf3, [23]uint8{0x51}},
	Optab{ASTC, ynone, Px, [23]uint8{0xf9}},
	Optab{ASTD, ynone, Px, [23]uint8{0xfd}},
	Optab{ASTI, ynone, Px, [23]uint8{0xfb}},
	Optab{ASTMXCSR, ysvrs, Pm, [23]uint8{0xae, 03, 0xae, 03}},
	Optab{ASTOSB, ynone, Pb, [23]uint8{0xaa}},
	Optab{ASTOSL, ynone, Px, [23]uint8{0xab}},
	Optab{ASTOSQ, ynone, Pw, [23]uint8{0xab}},
	Optab{ASTOSW, ynone, Pe, [23]uint8{0xab}},
	Optab{ASUBB, yxorb, Pb, [23]uint8{0x2c, 0x80, 05, 0x28, 0x2a}},
	Optab{ASUBL, yaddl, Px, [23]uint8{0x83, 05, 0x2d, 0x81, 05, 0x29, 0x2b}},
	Optab{ASUBPD, yxm, Pe, [23]uint8{0x5c}},
	Optab{ASUBPS, yxm, Pm, [23]uint8{0x5c}},
	Optab{ASUBQ, yaddl, Pw, [23]uint8{0x83, 05, 0x2d, 0x81, 05, 0x29, 0x2b}},
	Optab{ASUBSD, yxm, Pf2, [23]uint8{0x5c}},
	Optab{ASUBSS, yxm, Pf3, [23]uint8{0x5c}},
	Optab{ASUBW, yaddl, Pe, [23]uint8{0x83, 05, 0x2d, 0x81, 05, 0x29, 0x2b}},
	Optab{ASWAPGS, ynone, Pm, [23]uint8{0x01, 0xf8}},
	Optab{ASYSCALL, ynone, Px, [23]uint8{0x0f, 0x05}}, /* fast syscall */
	Optab{ATESTB, ytestb, Pb, [23]uint8{0xa8, 0xf6, 00, 0x84, 0x84}},
	Optab{ATESTL, ytestl, Px, [23]uint8{0xa9, 0xf7, 00, 0x85, 0x85}},
	Optab{ATESTQ, ytestl, Pw, [23]uint8{0xa9, 0xf7, 00, 0x85, 0x85}},
	Optab{ATESTW, ytestl, Pe, [23]uint8{0xa9, 0xf7, 00, 0x85, 0x85}},
1320
	Optab{obj.ATEXT, ytext, Px, [23]uint8{}},
1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355
	Optab{AUCOMISD, yxcmp, Pe, [23]uint8{0x2e}},
	Optab{AUCOMISS, yxcmp, Pm, [23]uint8{0x2e}},
	Optab{AUNPCKHPD, yxm, Pe, [23]uint8{0x15}},
	Optab{AUNPCKHPS, yxm, Pm, [23]uint8{0x15}},
	Optab{AUNPCKLPD, yxm, Pe, [23]uint8{0x14}},
	Optab{AUNPCKLPS, yxm, Pm, [23]uint8{0x14}},
	Optab{AVERR, ydivl, Pm, [23]uint8{0x00, 04}},
	Optab{AVERW, ydivl, Pm, [23]uint8{0x00, 05}},
	Optab{AWAIT, ynone, Px, [23]uint8{0x9b}},
	Optab{AWORD, ybyte, Px, [23]uint8{2}},
	Optab{AXCHGB, yml_mb, Pb, [23]uint8{0x86, 0x86}},
	Optab{AXCHGL, yxchg, Px, [23]uint8{0x90, 0x90, 0x87, 0x87}},
	Optab{AXCHGQ, yxchg, Pw, [23]uint8{0x90, 0x90, 0x87, 0x87}},
	Optab{AXCHGW, yxchg, Pe, [23]uint8{0x90, 0x90, 0x87, 0x87}},
	Optab{AXLAT, ynone, Px, [23]uint8{0xd7}},
	Optab{AXORB, yxorb, Pb, [23]uint8{0x34, 0x80, 06, 0x30, 0x32}},
	Optab{AXORL, yxorl, Px, [23]uint8{0x83, 06, 0x35, 0x81, 06, 0x31, 0x33}},
	Optab{AXORPD, yxm, Pe, [23]uint8{0x57}},
	Optab{AXORPS, yxm, Pm, [23]uint8{0x57}},
	Optab{AXORQ, yxorl, Pw, [23]uint8{0x83, 06, 0x35, 0x81, 06, 0x31, 0x33}},
	Optab{AXORW, yxorl, Pe, [23]uint8{0x83, 06, 0x35, 0x81, 06, 0x31, 0x33}},
	Optab{AFMOVB, yfmvx, Px, [23]uint8{0xdf, 04}},
	Optab{AFMOVBP, yfmvp, Px, [23]uint8{0xdf, 06}},
	Optab{AFMOVD, yfmvd, Px, [23]uint8{0xdd, 00, 0xdd, 02, 0xd9, 00, 0xdd, 02}},
	Optab{AFMOVDP, yfmvdp, Px, [23]uint8{0xdd, 03, 0xdd, 03}},
	Optab{AFMOVF, yfmvf, Px, [23]uint8{0xd9, 00, 0xd9, 02}},
	Optab{AFMOVFP, yfmvp, Px, [23]uint8{0xd9, 03}},
	Optab{AFMOVL, yfmvf, Px, [23]uint8{0xdb, 00, 0xdb, 02}},
	Optab{AFMOVLP, yfmvp, Px, [23]uint8{0xdb, 03}},
	Optab{AFMOVV, yfmvx, Px, [23]uint8{0xdf, 05}},
	Optab{AFMOVVP, yfmvp, Px, [23]uint8{0xdf, 07}},
	Optab{AFMOVW, yfmvf, Px, [23]uint8{0xdf, 00, 0xdf, 02}},
	Optab{AFMOVWP, yfmvp, Px, [23]uint8{0xdf, 03}},
	Optab{AFMOVX, yfmvx, Px, [23]uint8{0xdb, 05}},
	Optab{AFMOVXP, yfmvp, Px, [23]uint8{0xdb, 07}},
1356 1357 1358 1359 1360 1361 1362 1363
	Optab{AFCMOVCC, yfcmv, Px, [23]uint8{0xdb, 00}},
	Optab{AFCMOVCS, yfcmv, Px, [23]uint8{0xda, 00}},
	Optab{AFCMOVEQ, yfcmv, Px, [23]uint8{0xda, 01}},
	Optab{AFCMOVHI, yfcmv, Px, [23]uint8{0xdb, 02}},
	Optab{AFCMOVLS, yfcmv, Px, [23]uint8{0xda, 02}},
	Optab{AFCMOVNE, yfcmv, Px, [23]uint8{0xdb, 01}},
	Optab{AFCMOVNU, yfcmv, Px, [23]uint8{0xdb, 03}},
	Optab{AFCMOVUN, yfcmv, Px, [23]uint8{0xda, 03}},
1364 1365 1366 1367 1368 1369 1370
	Optab{AFCOMB, nil, 0, [23]uint8{}},
	Optab{AFCOMBP, nil, 0, [23]uint8{}},
	Optab{AFCOMD, yfadd, Px, [23]uint8{0xdc, 02, 0xd8, 02, 0xdc, 02}},  /* botch */
	Optab{AFCOMDP, yfadd, Px, [23]uint8{0xdc, 03, 0xd8, 03, 0xdc, 03}}, /* botch */
	Optab{AFCOMDPP, ycompp, Px, [23]uint8{0xde, 03}},
	Optab{AFCOMF, yfmvx, Px, [23]uint8{0xd8, 02}},
	Optab{AFCOMFP, yfmvx, Px, [23]uint8{0xd8, 03}},
1371 1372
	Optab{AFCOMI, yfmvx, Px, [23]uint8{0xdb, 06}},
	Optab{AFCOMIP, yfmvx, Px, [23]uint8{0xdf, 06}},
1373 1374 1375 1376 1377
	Optab{AFCOML, yfmvx, Px, [23]uint8{0xda, 02}},
	Optab{AFCOMLP, yfmvx, Px, [23]uint8{0xda, 03}},
	Optab{AFCOMW, yfmvx, Px, [23]uint8{0xde, 02}},
	Optab{AFCOMWP, yfmvx, Px, [23]uint8{0xde, 03}},
	Optab{AFUCOM, ycompp, Px, [23]uint8{0xdd, 04}},
1378 1379
	Optab{AFUCOMI, ycompp, Px, [23]uint8{0xdb, 05}},
	Optab{AFUCOMIP, ycompp, Px, [23]uint8{0xdf, 05}},
1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480
	Optab{AFUCOMP, ycompp, Px, [23]uint8{0xdd, 05}},
	Optab{AFUCOMPP, ycompp, Px, [23]uint8{0xda, 13}},
	Optab{AFADDDP, yfaddp, Px, [23]uint8{0xde, 00}},
	Optab{AFADDW, yfmvx, Px, [23]uint8{0xde, 00}},
	Optab{AFADDL, yfmvx, Px, [23]uint8{0xda, 00}},
	Optab{AFADDF, yfmvx, Px, [23]uint8{0xd8, 00}},
	Optab{AFADDD, yfadd, Px, [23]uint8{0xdc, 00, 0xd8, 00, 0xdc, 00}},
	Optab{AFMULDP, yfaddp, Px, [23]uint8{0xde, 01}},
	Optab{AFMULW, yfmvx, Px, [23]uint8{0xde, 01}},
	Optab{AFMULL, yfmvx, Px, [23]uint8{0xda, 01}},
	Optab{AFMULF, yfmvx, Px, [23]uint8{0xd8, 01}},
	Optab{AFMULD, yfadd, Px, [23]uint8{0xdc, 01, 0xd8, 01, 0xdc, 01}},
	Optab{AFSUBDP, yfaddp, Px, [23]uint8{0xde, 05}},
	Optab{AFSUBW, yfmvx, Px, [23]uint8{0xde, 04}},
	Optab{AFSUBL, yfmvx, Px, [23]uint8{0xda, 04}},
	Optab{AFSUBF, yfmvx, Px, [23]uint8{0xd8, 04}},
	Optab{AFSUBD, yfadd, Px, [23]uint8{0xdc, 04, 0xd8, 04, 0xdc, 05}},
	Optab{AFSUBRDP, yfaddp, Px, [23]uint8{0xde, 04}},
	Optab{AFSUBRW, yfmvx, Px, [23]uint8{0xde, 05}},
	Optab{AFSUBRL, yfmvx, Px, [23]uint8{0xda, 05}},
	Optab{AFSUBRF, yfmvx, Px, [23]uint8{0xd8, 05}},
	Optab{AFSUBRD, yfadd, Px, [23]uint8{0xdc, 05, 0xd8, 05, 0xdc, 04}},
	Optab{AFDIVDP, yfaddp, Px, [23]uint8{0xde, 07}},
	Optab{AFDIVW, yfmvx, Px, [23]uint8{0xde, 06}},
	Optab{AFDIVL, yfmvx, Px, [23]uint8{0xda, 06}},
	Optab{AFDIVF, yfmvx, Px, [23]uint8{0xd8, 06}},
	Optab{AFDIVD, yfadd, Px, [23]uint8{0xdc, 06, 0xd8, 06, 0xdc, 07}},
	Optab{AFDIVRDP, yfaddp, Px, [23]uint8{0xde, 06}},
	Optab{AFDIVRW, yfmvx, Px, [23]uint8{0xde, 07}},
	Optab{AFDIVRL, yfmvx, Px, [23]uint8{0xda, 07}},
	Optab{AFDIVRF, yfmvx, Px, [23]uint8{0xd8, 07}},
	Optab{AFDIVRD, yfadd, Px, [23]uint8{0xdc, 07, 0xd8, 07, 0xdc, 06}},
	Optab{AFXCHD, yfxch, Px, [23]uint8{0xd9, 01, 0xd9, 01}},
	Optab{AFFREE, nil, 0, [23]uint8{}},
	Optab{AFLDCW, ystcw, Px, [23]uint8{0xd9, 05, 0xd9, 05}},
	Optab{AFLDENV, ystcw, Px, [23]uint8{0xd9, 04, 0xd9, 04}},
	Optab{AFRSTOR, ysvrs, Px, [23]uint8{0xdd, 04, 0xdd, 04}},
	Optab{AFSAVE, ysvrs, Px, [23]uint8{0xdd, 06, 0xdd, 06}},
	Optab{AFSTCW, ystcw, Px, [23]uint8{0xd9, 07, 0xd9, 07}},
	Optab{AFSTENV, ystcw, Px, [23]uint8{0xd9, 06, 0xd9, 06}},
	Optab{AFSTSW, ystsw, Px, [23]uint8{0xdd, 07, 0xdf, 0xe0}},
	Optab{AF2XM1, ynone, Px, [23]uint8{0xd9, 0xf0}},
	Optab{AFABS, ynone, Px, [23]uint8{0xd9, 0xe1}},
	Optab{AFCHS, ynone, Px, [23]uint8{0xd9, 0xe0}},
	Optab{AFCLEX, ynone, Px, [23]uint8{0xdb, 0xe2}},
	Optab{AFCOS, ynone, Px, [23]uint8{0xd9, 0xff}},
	Optab{AFDECSTP, ynone, Px, [23]uint8{0xd9, 0xf6}},
	Optab{AFINCSTP, ynone, Px, [23]uint8{0xd9, 0xf7}},
	Optab{AFINIT, ynone, Px, [23]uint8{0xdb, 0xe3}},
	Optab{AFLD1, ynone, Px, [23]uint8{0xd9, 0xe8}},
	Optab{AFLDL2E, ynone, Px, [23]uint8{0xd9, 0xea}},
	Optab{AFLDL2T, ynone, Px, [23]uint8{0xd9, 0xe9}},
	Optab{AFLDLG2, ynone, Px, [23]uint8{0xd9, 0xec}},
	Optab{AFLDLN2, ynone, Px, [23]uint8{0xd9, 0xed}},
	Optab{AFLDPI, ynone, Px, [23]uint8{0xd9, 0xeb}},
	Optab{AFLDZ, ynone, Px, [23]uint8{0xd9, 0xee}},
	Optab{AFNOP, ynone, Px, [23]uint8{0xd9, 0xd0}},
	Optab{AFPATAN, ynone, Px, [23]uint8{0xd9, 0xf3}},
	Optab{AFPREM, ynone, Px, [23]uint8{0xd9, 0xf8}},
	Optab{AFPREM1, ynone, Px, [23]uint8{0xd9, 0xf5}},
	Optab{AFPTAN, ynone, Px, [23]uint8{0xd9, 0xf2}},
	Optab{AFRNDINT, ynone, Px, [23]uint8{0xd9, 0xfc}},
	Optab{AFSCALE, ynone, Px, [23]uint8{0xd9, 0xfd}},
	Optab{AFSIN, ynone, Px, [23]uint8{0xd9, 0xfe}},
	Optab{AFSINCOS, ynone, Px, [23]uint8{0xd9, 0xfb}},
	Optab{AFSQRT, ynone, Px, [23]uint8{0xd9, 0xfa}},
	Optab{AFTST, ynone, Px, [23]uint8{0xd9, 0xe4}},
	Optab{AFXAM, ynone, Px, [23]uint8{0xd9, 0xe5}},
	Optab{AFXTRACT, ynone, Px, [23]uint8{0xd9, 0xf4}},
	Optab{AFYL2X, ynone, Px, [23]uint8{0xd9, 0xf1}},
	Optab{AFYL2XP1, ynone, Px, [23]uint8{0xd9, 0xf9}},
	Optab{ACMPXCHGB, yrb_mb, Pb, [23]uint8{0x0f, 0xb0}},
	Optab{ACMPXCHGL, yrl_ml, Px, [23]uint8{0x0f, 0xb1}},
	Optab{ACMPXCHGW, yrl_ml, Pe, [23]uint8{0x0f, 0xb1}},
	Optab{ACMPXCHGQ, yrl_ml, Pw, [23]uint8{0x0f, 0xb1}},
	Optab{ACMPXCHG8B, yscond, Pm, [23]uint8{0xc7, 01}},
	Optab{AINVD, ynone, Pm, [23]uint8{0x08}},
	Optab{AINVLPG, ymbs, Pm, [23]uint8{0x01, 07}},
	Optab{ALFENCE, ynone, Pm, [23]uint8{0xae, 0xe8}},
	Optab{AMFENCE, ynone, Pm, [23]uint8{0xae, 0xf0}},
	Optab{AMOVNTIL, yrl_ml, Pm, [23]uint8{0xc3}},
	Optab{AMOVNTIQ, yrl_ml, Pw, [23]uint8{0x0f, 0xc3}},
	Optab{ARDMSR, ynone, Pm, [23]uint8{0x32}},
	Optab{ARDPMC, ynone, Pm, [23]uint8{0x33}},
	Optab{ARDTSC, ynone, Pm, [23]uint8{0x31}},
	Optab{ARSM, ynone, Pm, [23]uint8{0xaa}},
	Optab{ASFENCE, ynone, Pm, [23]uint8{0xae, 0xf8}},
	Optab{ASYSRET, ynone, Pm, [23]uint8{0x07}},
	Optab{AWBINVD, ynone, Pm, [23]uint8{0x09}},
	Optab{AWRMSR, ynone, Pm, [23]uint8{0x30}},
	Optab{AXADDB, yrb_mb, Pb, [23]uint8{0x0f, 0xc0}},
	Optab{AXADDL, yrl_ml, Px, [23]uint8{0x0f, 0xc1}},
	Optab{AXADDQ, yrl_ml, Pw, [23]uint8{0x0f, 0xc1}},
	Optab{AXADDW, yrl_ml, Pe, [23]uint8{0x0f, 0xc1}},
	Optab{ACRC32B, ycrc32l, Px, [23]uint8{0xf2, 0x0f, 0x38, 0xf0, 0}},
	Optab{ACRC32Q, ycrc32l, Pw, [23]uint8{0xf2, 0x0f, 0x38, 0xf1, 0}},
	Optab{APREFETCHT0, yprefetch, Pm, [23]uint8{0x18, 01}},
	Optab{APREFETCHT1, yprefetch, Pm, [23]uint8{0x18, 02}},
	Optab{APREFETCHT2, yprefetch, Pm, [23]uint8{0x18, 03}},
	Optab{APREFETCHNTA, yprefetch, Pm, [23]uint8{0x18, 00}},
	Optab{AMOVQL, yrl_ml, Px, [23]uint8{0x89}},
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	Optab{obj.AUNDEF, ynone, Px, [23]uint8{0x0f, 0x0b}},
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	Optab{AAESENC, yaes, Pq, [23]uint8{0x38, 0xdc, 0}},
	Optab{AAESENCLAST, yaes, Pq, [23]uint8{0x38, 0xdd, 0}},
	Optab{AAESDEC, yaes, Pq, [23]uint8{0x38, 0xde, 0}},
	Optab{AAESDECLAST, yaes, Pq, [23]uint8{0x38, 0xdf, 0}},
	Optab{AAESIMC, yaes, Pq, [23]uint8{0x38, 0xdb, 0}},
	Optab{AAESKEYGENASSIST, yaes2, Pq, [23]uint8{0x3a, 0xdf, 0}},
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	Optab{APSHUFD, yxshuf, Pq, [23]uint8{0x70, 0}},
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	Optab{APCLMULQDQ, yxshuf, Pq, [23]uint8{0x3a, 0x44, 0}},
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	Optab{obj.AUSEFIELD, ynop, Px, [23]uint8{0, 0}},
	Optab{obj.ATYPE, nil, 0, [23]uint8{}},
	Optab{obj.AFUNCDATA, yfuncdata, Px, [23]uint8{0, 0}},
	Optab{obj.APCDATA, ypcdata, Px, [23]uint8{0, 0}},
	Optab{obj.ACHECKNIL, nil, 0, [23]uint8{}},
	Optab{obj.AVARDEF, nil, 0, [23]uint8{}},
	Optab{obj.AVARKILL, nil, 0, [23]uint8{}},
	Optab{obj.ADUFFCOPY, yduff, Px, [23]uint8{0xe8}},
	Optab{obj.ADUFFZERO, yduff, Px, [23]uint8{0xe8}},
	Optab{obj.AEND, nil, 0, [23]uint8{}},
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	Optab{0, nil, 0, [23]uint8{}},
}

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var opindex [(ALAST + 1) & obj.AMask]*Optab
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// isextern reports whether s describes an external symbol that must avoid pc-relative addressing.
// This happens on systems like Solaris that call .so functions instead of system calls.
// It does not seem to be necessary for any other systems. This is probably working
// around a Solaris-specific bug that should be fixed differently, but we don't know
// what that bug is. And this does fix it.
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func isextern(s *obj.LSym) bool {
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	// All the Solaris dynamic imports from libc.so begin with "libc_".
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	return strings.HasPrefix(s.Name, "libc_")
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}

// single-instruction no-ops of various lengths.
// constructed by hand and disassembled with gdb to verify.
// see http://www.agner.org/optimize/optimizing_assembly.pdf for discussion.
var nop = [][16]uint8{
	[16]uint8{0x90},
	[16]uint8{0x66, 0x90},
	[16]uint8{0x0F, 0x1F, 0x00},
	[16]uint8{0x0F, 0x1F, 0x40, 0x00},
	[16]uint8{0x0F, 0x1F, 0x44, 0x00, 0x00},
	[16]uint8{0x66, 0x0F, 0x1F, 0x44, 0x00, 0x00},
	[16]uint8{0x0F, 0x1F, 0x80, 0x00, 0x00, 0x00, 0x00},
	[16]uint8{0x0F, 0x1F, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00},
	[16]uint8{0x66, 0x0F, 0x1F, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00},
}

// Native Client rejects the repeated 0x66 prefix.
// {0x66, 0x66, 0x0F, 0x1F, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00},
func fillnop(p []byte, n int) {
	var m int

	for n > 0 {
		m = n
		if m > len(nop) {
			m = len(nop)
		}
		copy(p[:m], nop[m-1][:m])
		p = p[m:]
		n -= m
	}
}

func naclpad(ctxt *obj.Link, s *obj.LSym, c int32, pad int32) int32 {
	obj.Symgrow(ctxt, s, int64(c)+int64(pad))
	fillnop(s.P[c:], int(pad))
	return c + pad
}

func spadjop(ctxt *obj.Link, p *obj.Prog, l int, q int) int {
	if p.Mode != 64 || ctxt.Arch.Ptrsize == 4 {
		return l
	}
	return q
}

func span6(ctxt *obj.Link, s *obj.LSym) {
	ctxt.Cursym = s

	if s.P != nil {
		return
	}

	if ycover[0] == 0 {
		instinit()
	}

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	var v int32
	for p := ctxt.Cursym.Text; p != nil; p = p.Link {
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		if p.To.Type == obj.TYPE_BRANCH {
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			if p.Pcond == nil {
				p.Pcond = p
			}
		}
		if p.As == AADJSP {
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			p.To.Type = obj.TYPE_REG
			p.To.Reg = REG_SP
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			v = int32(-p.From.Offset)
			p.From.Offset = int64(v)
			p.As = int16(spadjop(ctxt, p, AADDL, AADDQ))
			if v < 0 {
				p.As = int16(spadjop(ctxt, p, ASUBL, ASUBQ))
				v = -v
				p.From.Offset = int64(v)
			}

			if v == 0 {
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				p.As = obj.ANOP
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			}
		}
	}

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	var q *obj.Prog
	for p := s.Text; p != nil; p = p.Link {
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		p.Back = 2 // use short branches first time through
		q = p.Pcond
		if q != nil && (q.Back&2 != 0) {
			p.Back |= 1 // backward jump
			q.Back |= 4 // loop head
		}

		if p.As == AADJSP {
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			p.To.Type = obj.TYPE_REG
			p.To.Reg = REG_SP
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			v = int32(-p.From.Offset)
			p.From.Offset = int64(v)
			p.As = int16(spadjop(ctxt, p, AADDL, AADDQ))
			if v < 0 {
				p.As = int16(spadjop(ctxt, p, ASUBL, ASUBQ))
				v = -v
				p.From.Offset = int64(v)
			}

			if v == 0 {
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				p.As = obj.ANOP
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			}
		}
	}

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	n := 0
	var bp []byte
	var c int32
	var i int
	var loop int32
	var m int
	var p *obj.Prog
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	for {
		loop = 0
		for i = 0; i < len(s.R); i++ {
			s.R[i] = obj.Reloc{}
		}
		s.R = s.R[:0]
		s.P = s.P[:0]
		c = 0
		for p = s.Text; p != nil; p = p.Link {
			if ctxt.Headtype == obj.Hnacl && p.Isize > 0 {
				var deferreturn *obj.LSym

				if deferreturn == nil {
					deferreturn = obj.Linklookup(ctxt, "runtime.deferreturn", 0)
				}

				// pad everything to avoid crossing 32-byte boundary
				if c>>5 != (c+int32(p.Isize)-1)>>5 {
					c = naclpad(ctxt, s, c, -c&31)
				}

				// pad call deferreturn to start at 32-byte boundary
				// so that subtracting 5 in jmpdefer will jump back
				// to that boundary and rerun the call.
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				if p.As == obj.ACALL && p.To.Sym == deferreturn {
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					c = naclpad(ctxt, s, c, -c&31)
				}

				// pad call to end at 32-byte boundary
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				if p.As == obj.ACALL {
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					c = naclpad(ctxt, s, c, -(c+int32(p.Isize))&31)
				}

				// the linker treats REP and STOSQ as different instructions
				// but in fact the REP is a prefix on the STOSQ.
				// make sure REP has room for 2 more bytes, so that
				// padding will not be inserted before the next instruction.
				if (p.As == AREP || p.As == AREPN) && c>>5 != (c+3-1)>>5 {
					c = naclpad(ctxt, s, c, -c&31)
				}

				// same for LOCK.
				// various instructions follow; the longest is 4 bytes.
				// give ourselves 8 bytes so as to avoid surprises.
				if p.As == ALOCK && c>>5 != (c+8-1)>>5 {
					c = naclpad(ctxt, s, c, -c&31)
				}
			}

			if (p.Back&4 != 0) && c&(LoopAlign-1) != 0 {
				// pad with NOPs
				v = -c & (LoopAlign - 1)

				if v <= MaxLoopPad {
					obj.Symgrow(ctxt, s, int64(c)+int64(v))
					fillnop(s.P[c:], int(v))
					c += v
				}
			}

			p.Pc = int64(c)

			// process forward jumps to p
			for q = p.Comefrom; q != nil; q = q.Forwd {
				v = int32(p.Pc - (q.Pc + int64(q.Mark)))
				if q.Back&2 != 0 { // short
					if v > 127 {
						loop++
						q.Back ^= 2
					}

					if q.As == AJCXZL {
						s.P[q.Pc+2] = byte(v)
					} else {
						s.P[q.Pc+1] = byte(v)
					}
				} else {
					bp = s.P[q.Pc+int64(q.Mark)-4:]
					bp[0] = byte(v)
					bp = bp[1:]
					bp[0] = byte(v >> 8)
					bp = bp[1:]
					bp[0] = byte(v >> 16)
					bp = bp[1:]
					bp[0] = byte(v >> 24)
				}
			}

			p.Comefrom = nil

			p.Pc = int64(c)
			asmins(ctxt, p)
			m = -cap(ctxt.Andptr) + cap(ctxt.And[:])
			if int(p.Isize) != m {
				p.Isize = uint8(m)
				loop++
			}

			obj.Symgrow(ctxt, s, p.Pc+int64(m))
			copy(s.P[p.Pc:][:m], ctxt.And[:m])
			p.Mark = uint16(m)
			c += int32(m)
		}

		n++
		if n > 20 {
			ctxt.Diag("span must be looping")
			log.Fatalf("loop")
		}
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		if loop == 0 {
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			break
		}
	}

	if ctxt.Headtype == obj.Hnacl {
		c = naclpad(ctxt, s, c, -c&31)
	}

	c += -c & (FuncAlign - 1)
	s.Size = int64(c)

	if false { /* debug['a'] > 1 */
		fmt.Printf("span1 %s %d (%d tries)\n %.6x", s.Name, s.Size, n, 0)
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		var i int
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		for i = 0; i < len(s.P); i++ {
			fmt.Printf(" %.2x", s.P[i])
			if i%16 == 15 {
				fmt.Printf("\n  %.6x", uint(i+1))
			}
		}

		if i%16 != 0 {
			fmt.Printf("\n")
		}

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		for i := 0; i < len(s.R); i++ {
			r := &s.R[i]
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			fmt.Printf(" rel %#.4x/%d %s%+d\n", uint32(r.Off), r.Siz, r.Sym.Name, r.Add)
		}
	}
}

func instinit() {
	var c int

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	for i := 1; optab[i].as != 0; i++ {
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		c = int(optab[i].as)
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		if opindex[c&obj.AMask] != nil {
			log.Fatalf("phase error in optab: %d (%v)", i, obj.Aconv(c))
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		}
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		opindex[c&obj.AMask] = &optab[i]
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	}

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	for i := 0; i < Ymax; i++ {
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		ycover[i*Ymax+i] = 1
	}

	ycover[Yi0*Ymax+Yi8] = 1
	ycover[Yi1*Ymax+Yi8] = 1
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	ycover[Yu7*Ymax+Yi8] = 1

	ycover[Yi0*Ymax+Yu7] = 1
	ycover[Yi1*Ymax+Yu7] = 1

	ycover[Yi0*Ymax+Yu8] = 1
	ycover[Yi1*Ymax+Yu8] = 1
	ycover[Yu7*Ymax+Yu8] = 1
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	ycover[Yi0*Ymax+Ys32] = 1
	ycover[Yi1*Ymax+Ys32] = 1
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	ycover[Yu7*Ymax+Ys32] = 1
	ycover[Yu8*Ymax+Ys32] = 1
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	ycover[Yi8*Ymax+Ys32] = 1

	ycover[Yi0*Ymax+Yi32] = 1
	ycover[Yi1*Ymax+Yi32] = 1
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	ycover[Yu7*Ymax+Yi32] = 1
	ycover[Yu8*Ymax+Yi32] = 1
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	ycover[Yi8*Ymax+Yi32] = 1
	ycover[Ys32*Ymax+Yi32] = 1

	ycover[Yi0*Ymax+Yi64] = 1
	ycover[Yi1*Ymax+Yi64] = 1
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	ycover[Yu7*Ymax+Yi64] = 1
	ycover[Yu8*Ymax+Yi64] = 1
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	ycover[Yi8*Ymax+Yi64] = 1
	ycover[Ys32*Ymax+Yi64] = 1
	ycover[Yi32*Ymax+Yi64] = 1

	ycover[Yal*Ymax+Yrb] = 1
	ycover[Ycl*Ymax+Yrb] = 1
	ycover[Yax*Ymax+Yrb] = 1
	ycover[Ycx*Ymax+Yrb] = 1
	ycover[Yrx*Ymax+Yrb] = 1
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	ycover[Yrl*Ymax+Yrb] = 1 // but not Yrl32
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	ycover[Ycl*Ymax+Ycx] = 1

	ycover[Yax*Ymax+Yrx] = 1
	ycover[Ycx*Ymax+Yrx] = 1

	ycover[Yax*Ymax+Yrl] = 1
	ycover[Ycx*Ymax+Yrl] = 1
	ycover[Yrx*Ymax+Yrl] = 1
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	ycover[Yrl32*Ymax+Yrl] = 1
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	ycover[Yf0*Ymax+Yrf] = 1

	ycover[Yal*Ymax+Ymb] = 1
	ycover[Ycl*Ymax+Ymb] = 1
	ycover[Yax*Ymax+Ymb] = 1
	ycover[Ycx*Ymax+Ymb] = 1
	ycover[Yrx*Ymax+Ymb] = 1
	ycover[Yrb*Ymax+Ymb] = 1
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	ycover[Yrl*Ymax+Ymb] = 1 // but not Yrl32
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	ycover[Ym*Ymax+Ymb] = 1

	ycover[Yax*Ymax+Yml] = 1
	ycover[Ycx*Ymax+Yml] = 1
	ycover[Yrx*Ymax+Yml] = 1
	ycover[Yrl*Ymax+Yml] = 1
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	ycover[Yrl32*Ymax+Yml] = 1
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	ycover[Ym*Ymax+Yml] = 1

	ycover[Yax*Ymax+Ymm] = 1
	ycover[Ycx*Ymax+Ymm] = 1
	ycover[Yrx*Ymax+Ymm] = 1
	ycover[Yrl*Ymax+Ymm] = 1
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	ycover[Yrl32*Ymax+Ymm] = 1
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	ycover[Ym*Ymax+Ymm] = 1
	ycover[Ymr*Ymax+Ymm] = 1

	ycover[Ym*Ymax+Yxm] = 1
	ycover[Yxr*Ymax+Yxm] = 1

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	for i := 0; i < MAXREG; i++ {
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		reg[i] = -1
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		if i >= REG_AL && i <= REG_R15B {
			reg[i] = (i - REG_AL) & 7
			if i >= REG_SPB && i <= REG_DIB {
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				regrex[i] = 0x40
			}
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			if i >= REG_R8B && i <= REG_R15B {
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				regrex[i] = Rxr | Rxx | Rxb
			}
		}

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		if i >= REG_AH && i <= REG_BH {
			reg[i] = 4 + ((i - REG_AH) & 7)
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		}
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		if i >= REG_AX && i <= REG_R15 {
			reg[i] = (i - REG_AX) & 7
			if i >= REG_R8 {
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				regrex[i] = Rxr | Rxx | Rxb
			}
		}

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		if i >= REG_F0 && i <= REG_F0+7 {
			reg[i] = (i - REG_F0) & 7
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		}
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		if i >= REG_M0 && i <= REG_M0+7 {
			reg[i] = (i - REG_M0) & 7
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		}
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		if i >= REG_X0 && i <= REG_X0+15 {
			reg[i] = (i - REG_X0) & 7
			if i >= REG_X0+8 {
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				regrex[i] = Rxr | Rxx | Rxb
			}
		}

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		if i >= REG_CR+8 && i <= REG_CR+15 {
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			regrex[i] = Rxr
		}
	}
}

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func prefixof(ctxt *obj.Link, p *obj.Prog, a *obj.Addr) int {
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	if a.Type == obj.TYPE_MEM && a.Name == obj.NAME_NONE {
		switch a.Reg {
		case REG_CS:
			return 0x2e

		case REG_DS:
			return 0x3e

		case REG_ES:
			return 0x26

		case REG_FS:
			return 0x64

		case REG_GS:
			return 0x65

		case REG_TLS:
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			// NOTE: Systems listed here should be only systems that
			// support direct TLS references like 8(TLS) implemented as
			// direct references from FS or GS. Systems that require
			// the initial-exec model, where you load the TLS base into
			// a register and then index from that register, do not reach
			// this code and should not be listed.
			if p.Mode == 32 {
				switch ctxt.Headtype {
				default:
					log.Fatalf("unknown TLS base register for %s", obj.Headstr(ctxt.Headtype))

				case obj.Hdarwin,
					obj.Hdragonfly,
					obj.Hfreebsd,
					obj.Hnetbsd,
					obj.Hopenbsd:
					return 0x65 // GS
				}
			}

1944 1945 1946 1947
			switch ctxt.Headtype {
			default:
				log.Fatalf("unknown TLS base register for %s", obj.Headstr(ctxt.Headtype))

1948 1949 1950 1951 1952 1953 1954
			case obj.Hlinux:
				if ctxt.Flag_shared != 0 {
					log.Fatalf("unknown TLS base register for linux with -shared")
				} else {
					return 0x64 // FS
				}

1955 1956 1957 1958 1959 1960 1961 1962 1963 1964
			case obj.Hdragonfly,
				obj.Hfreebsd,
				obj.Hnetbsd,
				obj.Hopenbsd,
				obj.Hsolaris:
				return 0x64 // FS

			case obj.Hdarwin:
				return 0x65 // GS
			}
1965 1966 1967
		}
	}

1968 1969 1970 1971
	if p.Mode == 32 {
		return 0
	}

1972
	switch a.Index {
1973
	case REG_CS:
1974 1975
		return 0x2e

1976
	case REG_DS:
1977 1978
		return 0x3e

1979
	case REG_ES:
1980 1981
		return 0x26

1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996
	case REG_TLS:
		if ctxt.Flag_shared != 0 {
			// When building for inclusion into a shared library, an instruction of the form
			//     MOV 0(CX)(TLS*1), AX
			// becomes
			//     mov %fs:(%rcx), %rax
			// which assumes that the correct TLS offset has been loaded into %rcx (today
			// there is only one TLS variable -- g -- so this is OK). When not building for
			// a shared library the instruction does not require a prefix.
			if a.Offset != 0 {
				log.Fatalf("cannot handle non-0 offsets to TLS")
			}
			return 0x64
		}

1997
	case REG_FS:
1998 1999
		return 0x64

2000
	case REG_GS:
2001 2002 2003 2004 2005 2006
		return 0x65
	}

	return 0
}

2007 2008 2009 2010 2011 2012 2013
func oclass(ctxt *obj.Link, p *obj.Prog, a *obj.Addr) int {
	switch a.Type {
	case obj.TYPE_NONE:
		return Ynone

	case obj.TYPE_BRANCH:
		return Ybr
2014

2015 2016 2017 2018 2019 2020
	case obj.TYPE_INDIR:
		if a.Name != obj.NAME_NONE && a.Reg == REG_NONE && a.Index == REG_NONE && a.Scale == 0 {
			return Yindir
		}
		return Yxxx

2021 2022 2023 2024 2025 2026 2027
	case obj.TYPE_MEM:
		return Ym

	case obj.TYPE_ADDR:
		switch a.Name {
		case obj.NAME_EXTERN,
			obj.NAME_STATIC:
2028
			if a.Sym != nil && isextern(a.Sym) || p.Mode == 32 {
2029
				return Yi32
2030
			}
2031
			return Yiauto // use pc-relative addressing
2032

2033 2034 2035
		case obj.NAME_AUTO,
			obj.NAME_PARAM:
			return Yiauto
2036 2037
		}

2038 2039 2040 2041 2042 2043 2044 2045
		// TODO(rsc): DUFFZERO/DUFFCOPY encoding forgot to set a->index
		// and got Yi32 in an earlier version of this code.
		// Keep doing that until we fix yduff etc.
		if a.Sym != nil && strings.HasPrefix(a.Sym.Name, "runtime.duff") {
			return Yi32
		}

		if a.Sym != nil || a.Name != obj.NAME_NONE {
2046
			ctxt.Diag("unexpected addr: %v", obj.Dconv(p, a))
2047 2048 2049 2050 2051 2052 2053
		}
		fallthrough

		// fall through

	case obj.TYPE_CONST:
		if a.Sym != nil {
2054
			ctxt.Diag("TYPE_CONST with symbol: %v", obj.Dconv(p, a))
2055 2056
		}

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2057
		v := a.Offset
2058 2059 2060
		if p.Mode == 32 {
			v = int64(int32(v))
		}
2061 2062 2063 2064 2065 2066
		if v == 0 {
			return Yi0
		}
		if v == 1 {
			return Yi1
		}
2067 2068 2069 2070 2071 2072
		if v >= 0 && v <= 127 {
			return Yu7
		}
		if v >= 0 && v <= 255 {
			return Yu8
		}
2073 2074 2075
		if v >= -128 && v <= 127 {
			return Yi8
		}
2076 2077 2078
		if p.Mode == 32 {
			return Yi32
		}
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2079
		l := int32(v)
2080 2081 2082 2083 2084 2085 2086 2087 2088 2089
		if int64(l) == v {
			return Ys32 /* can sign extend */
		}
		if v>>32 == 0 {
			return Yi32 /* unsigned */
		}
		return Yi64

	case obj.TYPE_TEXTSIZE:
		return Ytextsize
2090 2091
	}

2092
	if a.Type != obj.TYPE_REG {
2093
		ctxt.Diag("unexpected addr1: type=%d %v", a.Type, obj.Dconv(p, a))
2094 2095 2096 2097 2098
		return Yxxx
	}

	switch a.Reg {
	case REG_AL:
2099 2100
		return Yal

2101
	case REG_AX:
2102 2103 2104
		return Yax

		/*
2105
			case REG_SPB:
2106
		*/
2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117
	case REG_BPB,
		REG_SIB,
		REG_DIB,
		REG_R8B,
		REG_R9B,
		REG_R10B,
		REG_R11B,
		REG_R12B,
		REG_R13B,
		REG_R14B,
		REG_R15B:
2118 2119 2120 2121 2122
		if ctxt.Asmode != 64 {
			return Yxxx
		}
		fallthrough

2123 2124 2125 2126 2127 2128
	case REG_DL,
		REG_BL,
		REG_AH,
		REG_CH,
		REG_DH,
		REG_BH:
2129 2130
		return Yrb

2131
	case REG_CL:
2132 2133
		return Ycl

2134
	case REG_CX:
2135 2136
		return Ycx

2137 2138
	case REG_DX,
		REG_BX:
2139 2140
		return Yrx

2141 2142 2143 2144 2145 2146 2147 2148
	case REG_R8, /* not really Yrl */
		REG_R9,
		REG_R10,
		REG_R11,
		REG_R12,
		REG_R13,
		REG_R14,
		REG_R15:
2149 2150 2151 2152 2153
		if ctxt.Asmode != 64 {
			return Yxxx
		}
		fallthrough

2154 2155 2156 2157
	case REG_SP,
		REG_BP,
		REG_SI,
		REG_DI:
2158 2159 2160
		if p.Mode == 32 {
			return Yrl32
		}
2161 2162
		return Yrl

2163
	case REG_F0 + 0:
2164 2165
		return Yf0

2166 2167 2168 2169 2170 2171 2172
	case REG_F0 + 1,
		REG_F0 + 2,
		REG_F0 + 3,
		REG_F0 + 4,
		REG_F0 + 5,
		REG_F0 + 6,
		REG_F0 + 7:
2173 2174
		return Yrf

2175 2176 2177 2178 2179 2180 2181 2182
	case REG_M0 + 0,
		REG_M0 + 1,
		REG_M0 + 2,
		REG_M0 + 3,
		REG_M0 + 4,
		REG_M0 + 5,
		REG_M0 + 6,
		REG_M0 + 7:
2183 2184
		return Ymr

2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200
	case REG_X0 + 0,
		REG_X0 + 1,
		REG_X0 + 2,
		REG_X0 + 3,
		REG_X0 + 4,
		REG_X0 + 5,
		REG_X0 + 6,
		REG_X0 + 7,
		REG_X0 + 8,
		REG_X0 + 9,
		REG_X0 + 10,
		REG_X0 + 11,
		REG_X0 + 12,
		REG_X0 + 13,
		REG_X0 + 14,
		REG_X0 + 15:
2201 2202
		return Yxr

2203
	case REG_CS:
2204
		return Ycs
2205
	case REG_SS:
2206
		return Yss
2207
	case REG_DS:
2208
		return Yds
2209
	case REG_ES:
2210
		return Yes
2211
	case REG_FS:
2212
		return Yfs
2213
	case REG_GS:
2214
		return Ygs
2215
	case REG_TLS:
2216 2217
		return Ytls

2218
	case REG_GDTR:
2219
		return Ygdtr
2220
	case REG_IDTR:
2221
		return Yidtr
2222
	case REG_LDTR:
2223
		return Yldtr
2224
	case REG_MSW:
2225
		return Ymsw
2226
	case REG_TASK:
2227 2228
		return Ytask

2229
	case REG_CR + 0:
2230
		return Ycr0
2231
	case REG_CR + 1:
2232
		return Ycr1
2233
	case REG_CR + 2:
2234
		return Ycr2
2235
	case REG_CR + 3:
2236
		return Ycr3
2237
	case REG_CR + 4:
2238
		return Ycr4
2239
	case REG_CR + 5:
2240
		return Ycr5
2241
	case REG_CR + 6:
2242
		return Ycr6
2243
	case REG_CR + 7:
2244
		return Ycr7
2245
	case REG_CR + 8:
2246 2247
		return Ycr8

2248
	case REG_DR + 0:
2249
		return Ydr0
2250
	case REG_DR + 1:
2251
		return Ydr1
2252
	case REG_DR + 2:
2253
		return Ydr2
2254
	case REG_DR + 3:
2255
		return Ydr3
2256
	case REG_DR + 4:
2257
		return Ydr4
2258
	case REG_DR + 5:
2259
		return Ydr5
2260
	case REG_DR + 6:
2261
		return Ydr6
2262
	case REG_DR + 7:
2263 2264
		return Ydr7

2265
	case REG_TR + 0:
2266
		return Ytr0
2267
	case REG_TR + 1:
2268
		return Ytr1
2269
	case REG_TR + 2:
2270
		return Ytr2
2271
	case REG_TR + 3:
2272
		return Ytr3
2273
	case REG_TR + 4:
2274
		return Ytr4
2275
	case REG_TR + 5:
2276
		return Ytr5
2277
	case REG_TR + 6:
2278
		return Ytr6
2279
	case REG_TR + 7:
2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292
		return Ytr7
	}

	return Yxxx
}

func asmidx(ctxt *obj.Link, scale int, index int, base int) {
	var i int

	switch index {
	default:
		goto bad

2293
	case REG_NONE:
2294 2295 2296
		i = 4 << 3
		goto bas

2297 2298 2299 2300 2301 2302 2303 2304
	case REG_R8,
		REG_R9,
		REG_R10,
		REG_R11,
		REG_R12,
		REG_R13,
		REG_R14,
		REG_R15:
2305 2306 2307 2308 2309
		if ctxt.Asmode != 64 {
			goto bad
		}
		fallthrough

2310 2311 2312 2313 2314 2315 2316
	case REG_AX,
		REG_CX,
		REG_DX,
		REG_BX,
		REG_BP,
		REG_SI,
		REG_DI:
2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341
		i = reg[index] << 3
	}

	switch scale {
	default:
		goto bad

	case 1:
		break

	case 2:
		i |= 1 << 6

	case 4:
		i |= 2 << 6

	case 8:
		i |= 3 << 6
	}

bas:
	switch base {
	default:
		goto bad

2342
	case REG_NONE: /* must be mod=00 */
2343 2344
		i |= 5

2345 2346 2347 2348 2349 2350 2351 2352
	case REG_R8,
		REG_R9,
		REG_R10,
		REG_R11,
		REG_R12,
		REG_R13,
		REG_R14,
		REG_R15:
2353 2354 2355 2356 2357
		if ctxt.Asmode != 64 {
			goto bad
		}
		fallthrough

2358 2359 2360 2361 2362 2363 2364 2365
	case REG_AX,
		REG_CX,
		REG_DX,
		REG_BX,
		REG_SP,
		REG_BP,
		REG_SI,
		REG_DI:
2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390
		i |= reg[base]
	}

	ctxt.Andptr[0] = byte(i)
	ctxt.Andptr = ctxt.Andptr[1:]
	return

bad:
	ctxt.Diag("asmidx: bad address %d/%d/%d", scale, index, base)
	ctxt.Andptr[0] = 0
	ctxt.Andptr = ctxt.Andptr[1:]
	return
}

func put4(ctxt *obj.Link, v int32) {
	ctxt.Andptr[0] = byte(v)
	ctxt.Andptr[1] = byte(v >> 8)
	ctxt.Andptr[2] = byte(v >> 16)
	ctxt.Andptr[3] = byte(v >> 24)
	ctxt.Andptr = ctxt.Andptr[4:]
}

func relput4(ctxt *obj.Link, p *obj.Prog, a *obj.Addr) {
	var rel obj.Reloc

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2391
	v := vaddr(ctxt, p, a, &rel)
2392 2393 2394 2395
	if rel.Siz != 0 {
		if rel.Siz != 4 {
			ctxt.Diag("bad reloc")
		}
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2396
		r := obj.Addrel(ctxt.Cursym)
2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437
		*r = rel
		r.Off = int32(p.Pc + int64(-cap(ctxt.Andptr)+cap(ctxt.And[:])))
	}

	put4(ctxt, int32(v))
}

func put8(ctxt *obj.Link, v int64) {
	ctxt.Andptr[0] = byte(v)
	ctxt.Andptr[1] = byte(v >> 8)
	ctxt.Andptr[2] = byte(v >> 16)
	ctxt.Andptr[3] = byte(v >> 24)
	ctxt.Andptr[4] = byte(v >> 32)
	ctxt.Andptr[5] = byte(v >> 40)
	ctxt.Andptr[6] = byte(v >> 48)
	ctxt.Andptr[7] = byte(v >> 56)
	ctxt.Andptr = ctxt.Andptr[8:]
}

/*
static void
relput8(Prog *p, Addr *a)
{
	vlong v;
	Reloc rel, *r;

	v = vaddr(ctxt, p, a, &rel);
	if(rel.siz != 0) {
		r = addrel(ctxt->cursym);
		*r = rel;
		r->siz = 8;
		r->off = p->pc + ctxt->andptr - ctxt->and;
	}
	put8(ctxt, v);
}
*/
func vaddr(ctxt *obj.Link, p *obj.Prog, a *obj.Addr, r *obj.Reloc) int64 {
	if r != nil {
		*r = obj.Reloc{}
	}

2438 2439 2440
	switch a.Name {
	case obj.NAME_STATIC,
		obj.NAME_EXTERN:
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Russ Cox committed
2441
		s := a.Sym
2442
		if r == nil {
2443
			ctxt.Diag("need reloc for %v", obj.Dconv(p, a))
2444 2445 2446
			log.Fatalf("reloc")
		}

2447
		if isextern(s) || p.Mode != 64 {
2448
			r.Siz = 4
2449
			r.Type = obj.R_ADDR
2450 2451
		} else {
			r.Siz = 4
2452
			r.Type = obj.R_PCREL
2453 2454 2455 2456
		}

		r.Off = -1 // caller must fill in
		r.Sym = s
2457
		r.Add = a.Offset
2458
		if s.Type == obj.STLSBSS {
2459
			r.Xadd = r.Add - int64(r.Siz)
2460
			r.Type = obj.R_TLS
2461 2462 2463
			r.Xsym = s
		}

2464 2465 2466 2467
		return 0
	}

	if (a.Type == obj.TYPE_MEM || a.Type == obj.TYPE_ADDR) && a.Reg == REG_TLS {
2468
		if r == nil {
2469
			ctxt.Diag("need reloc for %v", obj.Dconv(p, a))
2470 2471 2472
			log.Fatalf("reloc")
		}

2473
		r.Type = obj.R_TLS_LE
2474 2475
		r.Siz = 4
		r.Off = -1 // caller must fill in
2476 2477
		r.Add = a.Offset
		return 0
2478 2479
	}

2480
	return a.Offset
2481 2482 2483
}

func asmandsz(ctxt *obj.Link, p *obj.Prog, a *obj.Addr, r int, rex int, m64 int) {
2484
	var base int
2485 2486 2487
	var rel obj.Reloc

	rex &= 0x40 | Rxr
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2488
	v := int32(a.Offset)
2489 2490
	rel.Siz = 0

2491 2492 2493 2494 2495 2496 2497 2498 2499
	switch a.Type {
	case obj.TYPE_ADDR:
		if a.Name == obj.NAME_NONE {
			ctxt.Diag("unexpected TYPE_ADDR with NAME_NONE")
		}
		if a.Index == REG_TLS {
			ctxt.Diag("unexpected TYPE_ADDR with index==REG_TLS")
		}
		goto bad
2500

2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518
	case obj.TYPE_REG:
		if a.Reg < REG_AL || REG_X0+15 < a.Reg {
			goto bad
		}
		if v != 0 {
			goto bad
		}
		ctxt.Andptr[0] = byte(3<<6 | reg[a.Reg]<<0 | r<<3)
		ctxt.Andptr = ctxt.Andptr[1:]
		ctxt.Rexflag |= regrex[a.Reg]&(0x40|Rxb) | rex
		return
	}

	if a.Type != obj.TYPE_MEM {
		goto bad
	}

	if a.Index != REG_NONE && a.Index != REG_TLS {
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2519
		base := int(a.Reg)
2520 2521 2522
		switch a.Name {
		case obj.NAME_EXTERN,
			obj.NAME_STATIC:
2523
			if !isextern(a.Sym) && p.Mode == 64 {
2524
				goto bad
2525
			}
2526 2527
			base = REG_NONE
			v = int32(vaddr(ctxt, p, a, &rel))
2528

2529 2530 2531
		case obj.NAME_AUTO,
			obj.NAME_PARAM:
			base = REG_SP
2532
		}
2533 2534 2535

		ctxt.Rexflag |= regrex[int(a.Index)]&Rxx | regrex[base]&Rxb | rex
		if base == REG_NONE {
2536 2537
			ctxt.Andptr[0] = byte(0<<6 | 4<<0 | r<<3)
			ctxt.Andptr = ctxt.Andptr[1:]
2538
			asmidx(ctxt, int(a.Scale), int(a.Index), base)
2539 2540 2541
			goto putrelv
		}

2542
		if v == 0 && rel.Siz == 0 && base != REG_BP && base != REG_R13 {
2543 2544
			ctxt.Andptr[0] = byte(0<<6 | 4<<0 | r<<3)
			ctxt.Andptr = ctxt.Andptr[1:]
2545
			asmidx(ctxt, int(a.Scale), int(a.Index), base)
2546 2547 2548 2549 2550 2551
			return
		}

		if v >= -128 && v < 128 && rel.Siz == 0 {
			ctxt.Andptr[0] = byte(1<<6 | 4<<0 | r<<3)
			ctxt.Andptr = ctxt.Andptr[1:]
2552
			asmidx(ctxt, int(a.Scale), int(a.Index), base)
2553 2554 2555 2556 2557 2558 2559
			ctxt.Andptr[0] = byte(v)
			ctxt.Andptr = ctxt.Andptr[1:]
			return
		}

		ctxt.Andptr[0] = byte(2<<6 | 4<<0 | r<<3)
		ctxt.Andptr = ctxt.Andptr[1:]
2560
		asmidx(ctxt, int(a.Scale), int(a.Index), base)
2561 2562 2563
		goto putrelv
	}

2564 2565 2566 2567 2568 2569
	base = int(a.Reg)
	switch a.Name {
	case obj.NAME_STATIC,
		obj.NAME_EXTERN:
		if a.Sym == nil {
			ctxt.Diag("bad addr: %v", p)
2570
		}
2571 2572
		base = REG_NONE
		v = int32(vaddr(ctxt, p, a, &rel))
2573

2574 2575 2576
	case obj.NAME_AUTO,
		obj.NAME_PARAM:
		base = REG_SP
2577
	}
2578 2579

	if base == REG_TLS {
2580 2581 2582
		v = int32(vaddr(ctxt, p, a, &rel))
	}

2583 2584
	ctxt.Rexflag |= regrex[base]&Rxb | rex
	if base == REG_NONE || (REG_CS <= base && base <= REG_GS) || base == REG_TLS {
2585
		if (a.Sym == nil || !isextern(a.Sym)) && base == REG_NONE && (a.Name == obj.NAME_STATIC || a.Name == obj.NAME_EXTERN) || p.Mode != 64 {
2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598
			ctxt.Andptr[0] = byte(0<<6 | 5<<0 | r<<3)
			ctxt.Andptr = ctxt.Andptr[1:]
			goto putrelv
		}

		/* temporary */
		ctxt.Andptr[0] = byte(0<<6 | 4<<0 | r<<3)
		ctxt.Andptr = ctxt.Andptr[1:] /* sib present */
		ctxt.Andptr[0] = 0<<6 | 4<<3 | 5<<0
		ctxt.Andptr = ctxt.Andptr[1:] /* DS:d32 */
		goto putrelv
	}

2599
	if base == REG_SP || base == REG_R12 {
2600
		if v == 0 {
2601
			ctxt.Andptr[0] = byte(0<<6 | reg[base]<<0 | r<<3)
2602
			ctxt.Andptr = ctxt.Andptr[1:]
2603
			asmidx(ctxt, int(a.Scale), REG_NONE, base)
2604 2605 2606 2607
			return
		}

		if v >= -128 && v < 128 {
2608
			ctxt.Andptr[0] = byte(1<<6 | reg[base]<<0 | r<<3)
2609
			ctxt.Andptr = ctxt.Andptr[1:]
2610
			asmidx(ctxt, int(a.Scale), REG_NONE, base)
2611 2612 2613 2614 2615
			ctxt.Andptr[0] = byte(v)
			ctxt.Andptr = ctxt.Andptr[1:]
			return
		}

2616
		ctxt.Andptr[0] = byte(2<<6 | reg[base]<<0 | r<<3)
2617
		ctxt.Andptr = ctxt.Andptr[1:]
2618
		asmidx(ctxt, int(a.Scale), REG_NONE, base)
2619 2620 2621
		goto putrelv
	}

2622
	if REG_AX <= base && base <= REG_R15 {
2623
		if a.Index == REG_TLS && ctxt.Flag_shared == 0 {
2624
			rel = obj.Reloc{}
2625
			rel.Type = obj.R_TLS_IE
2626 2627 2628 2629 2630 2631
			rel.Siz = 4
			rel.Sym = nil
			rel.Add = int64(v)
			v = 0
		}

2632 2633
		if v == 0 && rel.Siz == 0 && base != REG_BP && base != REG_R13 {
			ctxt.Andptr[0] = byte(0<<6 | reg[base]<<0 | r<<3)
2634 2635 2636 2637 2638
			ctxt.Andptr = ctxt.Andptr[1:]
			return
		}

		if v >= -128 && v < 128 && rel.Siz == 0 {
2639
			ctxt.Andptr[0] = byte(1<<6 | reg[base]<<0 | r<<3)
2640 2641 2642 2643 2644
			ctxt.Andptr[1] = byte(v)
			ctxt.Andptr = ctxt.Andptr[2:]
			return
		}

2645
		ctxt.Andptr[0] = byte(2<<6 | reg[base]<<0 | r<<3)
2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658
		ctxt.Andptr = ctxt.Andptr[1:]
		goto putrelv
	}

	goto bad

putrelv:
	if rel.Siz != 0 {
		if rel.Siz != 4 {
			ctxt.Diag("bad rel")
			goto bad
		}

Russ Cox's avatar
Russ Cox committed
2659
		r := obj.Addrel(ctxt.Cursym)
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		*r = rel
		r.Off = int32(ctxt.Curp.Pc + int64(-cap(ctxt.Andptr)+cap(ctxt.And[:])))
	}

	put4(ctxt, v)
	return

bad:
2668
	ctxt.Diag("asmand: bad address %v", obj.Dconv(p, a))
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	return
}

func asmand(ctxt *obj.Link, p *obj.Prog, a *obj.Addr, ra *obj.Addr) {
2673
	asmandsz(ctxt, p, a, reg[ra.Reg], regrex[ra.Reg], 0)
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}

func asmando(ctxt *obj.Link, p *obj.Prog, a *obj.Addr, o int) {
	asmandsz(ctxt, p, a, o, 0, 0)
}

func bytereg(a *obj.Addr, t *uint8) {
2681 2682
	if a.Type == obj.TYPE_REG && a.Index == REG_NONE && (REG_AX <= a.Reg && a.Reg <= REG_R15) {
		a.Reg += REG_AL - REG_AX
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		*t = 0
	}
}

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func unbytereg(a *obj.Addr, t *uint8) {
	if a.Type == obj.TYPE_REG && a.Index == REG_NONE && (REG_AL <= a.Reg && a.Reg <= REG_R15B) {
		a.Reg += REG_AX - REG_AL
		*t = 0
	}
}

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const (
	E = 0xff
)

var ymovtab = []Movtab{
	/* push */
2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713
	Movtab{APUSHL, Ycs, Ynone, Ynone, 0, [4]uint8{0x0e, E, 0, 0}},
	Movtab{APUSHL, Yss, Ynone, Ynone, 0, [4]uint8{0x16, E, 0, 0}},
	Movtab{APUSHL, Yds, Ynone, Ynone, 0, [4]uint8{0x1e, E, 0, 0}},
	Movtab{APUSHL, Yes, Ynone, Ynone, 0, [4]uint8{0x06, E, 0, 0}},
	Movtab{APUSHL, Yfs, Ynone, Ynone, 0, [4]uint8{0x0f, 0xa0, E, 0}},
	Movtab{APUSHL, Ygs, Ynone, Ynone, 0, [4]uint8{0x0f, 0xa8, E, 0}},
	Movtab{APUSHQ, Yfs, Ynone, Ynone, 0, [4]uint8{0x0f, 0xa0, E, 0}},
	Movtab{APUSHQ, Ygs, Ynone, Ynone, 0, [4]uint8{0x0f, 0xa8, E, 0}},
	Movtab{APUSHW, Ycs, Ynone, Ynone, 0, [4]uint8{Pe, 0x0e, E, 0}},
	Movtab{APUSHW, Yss, Ynone, Ynone, 0, [4]uint8{Pe, 0x16, E, 0}},
	Movtab{APUSHW, Yds, Ynone, Ynone, 0, [4]uint8{Pe, 0x1e, E, 0}},
	Movtab{APUSHW, Yes, Ynone, Ynone, 0, [4]uint8{Pe, 0x06, E, 0}},
	Movtab{APUSHW, Yfs, Ynone, Ynone, 0, [4]uint8{Pe, 0x0f, 0xa0, E}},
	Movtab{APUSHW, Ygs, Ynone, Ynone, 0, [4]uint8{Pe, 0x0f, 0xa8, E}},
2714 2715

	/* pop */
2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727
	Movtab{APOPL, Ynone, Ynone, Yds, 0, [4]uint8{0x1f, E, 0, 0}},
	Movtab{APOPL, Ynone, Ynone, Yes, 0, [4]uint8{0x07, E, 0, 0}},
	Movtab{APOPL, Ynone, Ynone, Yss, 0, [4]uint8{0x17, E, 0, 0}},
	Movtab{APOPL, Ynone, Ynone, Yfs, 0, [4]uint8{0x0f, 0xa1, E, 0}},
	Movtab{APOPL, Ynone, Ynone, Ygs, 0, [4]uint8{0x0f, 0xa9, E, 0}},
	Movtab{APOPQ, Ynone, Ynone, Yfs, 0, [4]uint8{0x0f, 0xa1, E, 0}},
	Movtab{APOPQ, Ynone, Ynone, Ygs, 0, [4]uint8{0x0f, 0xa9, E, 0}},
	Movtab{APOPW, Ynone, Ynone, Yds, 0, [4]uint8{Pe, 0x1f, E, 0}},
	Movtab{APOPW, Ynone, Ynone, Yes, 0, [4]uint8{Pe, 0x07, E, 0}},
	Movtab{APOPW, Ynone, Ynone, Yss, 0, [4]uint8{Pe, 0x17, E, 0}},
	Movtab{APOPW, Ynone, Ynone, Yfs, 0, [4]uint8{Pe, 0x0f, 0xa1, E}},
	Movtab{APOPW, Ynone, Ynone, Ygs, 0, [4]uint8{Pe, 0x0f, 0xa9, E}},
2728 2729

	/* mov seg */
2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741
	Movtab{AMOVW, Yes, Ynone, Yml, 1, [4]uint8{0x8c, 0, 0, 0}},
	Movtab{AMOVW, Ycs, Ynone, Yml, 1, [4]uint8{0x8c, 1, 0, 0}},
	Movtab{AMOVW, Yss, Ynone, Yml, 1, [4]uint8{0x8c, 2, 0, 0}},
	Movtab{AMOVW, Yds, Ynone, Yml, 1, [4]uint8{0x8c, 3, 0, 0}},
	Movtab{AMOVW, Yfs, Ynone, Yml, 1, [4]uint8{0x8c, 4, 0, 0}},
	Movtab{AMOVW, Ygs, Ynone, Yml, 1, [4]uint8{0x8c, 5, 0, 0}},
	Movtab{AMOVW, Yml, Ynone, Yes, 2, [4]uint8{0x8e, 0, 0, 0}},
	Movtab{AMOVW, Yml, Ynone, Ycs, 2, [4]uint8{0x8e, 1, 0, 0}},
	Movtab{AMOVW, Yml, Ynone, Yss, 2, [4]uint8{0x8e, 2, 0, 0}},
	Movtab{AMOVW, Yml, Ynone, Yds, 2, [4]uint8{0x8e, 3, 0, 0}},
	Movtab{AMOVW, Yml, Ynone, Yfs, 2, [4]uint8{0x8e, 4, 0, 0}},
	Movtab{AMOVW, Yml, Ynone, Ygs, 2, [4]uint8{0x8e, 5, 0, 0}},
2742 2743

	/* mov cr */
2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763
	Movtab{AMOVL, Ycr0, Ynone, Yml, 3, [4]uint8{0x0f, 0x20, 0, 0}},
	Movtab{AMOVL, Ycr2, Ynone, Yml, 3, [4]uint8{0x0f, 0x20, 2, 0}},
	Movtab{AMOVL, Ycr3, Ynone, Yml, 3, [4]uint8{0x0f, 0x20, 3, 0}},
	Movtab{AMOVL, Ycr4, Ynone, Yml, 3, [4]uint8{0x0f, 0x20, 4, 0}},
	Movtab{AMOVL, Ycr8, Ynone, Yml, 3, [4]uint8{0x0f, 0x20, 8, 0}},
	Movtab{AMOVQ, Ycr0, Ynone, Yml, 3, [4]uint8{0x0f, 0x20, 0, 0}},
	Movtab{AMOVQ, Ycr2, Ynone, Yml, 3, [4]uint8{0x0f, 0x20, 2, 0}},
	Movtab{AMOVQ, Ycr3, Ynone, Yml, 3, [4]uint8{0x0f, 0x20, 3, 0}},
	Movtab{AMOVQ, Ycr4, Ynone, Yml, 3, [4]uint8{0x0f, 0x20, 4, 0}},
	Movtab{AMOVQ, Ycr8, Ynone, Yml, 3, [4]uint8{0x0f, 0x20, 8, 0}},
	Movtab{AMOVL, Yml, Ynone, Ycr0, 4, [4]uint8{0x0f, 0x22, 0, 0}},
	Movtab{AMOVL, Yml, Ynone, Ycr2, 4, [4]uint8{0x0f, 0x22, 2, 0}},
	Movtab{AMOVL, Yml, Ynone, Ycr3, 4, [4]uint8{0x0f, 0x22, 3, 0}},
	Movtab{AMOVL, Yml, Ynone, Ycr4, 4, [4]uint8{0x0f, 0x22, 4, 0}},
	Movtab{AMOVL, Yml, Ynone, Ycr8, 4, [4]uint8{0x0f, 0x22, 8, 0}},
	Movtab{AMOVQ, Yml, Ynone, Ycr0, 4, [4]uint8{0x0f, 0x22, 0, 0}},
	Movtab{AMOVQ, Yml, Ynone, Ycr2, 4, [4]uint8{0x0f, 0x22, 2, 0}},
	Movtab{AMOVQ, Yml, Ynone, Ycr3, 4, [4]uint8{0x0f, 0x22, 3, 0}},
	Movtab{AMOVQ, Yml, Ynone, Ycr4, 4, [4]uint8{0x0f, 0x22, 4, 0}},
	Movtab{AMOVQ, Yml, Ynone, Ycr8, 4, [4]uint8{0x0f, 0x22, 8, 0}},
2764 2765

	/* mov dr */
2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777
	Movtab{AMOVL, Ydr0, Ynone, Yml, 3, [4]uint8{0x0f, 0x21, 0, 0}},
	Movtab{AMOVL, Ydr6, Ynone, Yml, 3, [4]uint8{0x0f, 0x21, 6, 0}},
	Movtab{AMOVL, Ydr7, Ynone, Yml, 3, [4]uint8{0x0f, 0x21, 7, 0}},
	Movtab{AMOVQ, Ydr0, Ynone, Yml, 3, [4]uint8{0x0f, 0x21, 0, 0}},
	Movtab{AMOVQ, Ydr6, Ynone, Yml, 3, [4]uint8{0x0f, 0x21, 6, 0}},
	Movtab{AMOVQ, Ydr7, Ynone, Yml, 3, [4]uint8{0x0f, 0x21, 7, 0}},
	Movtab{AMOVL, Yml, Ynone, Ydr0, 4, [4]uint8{0x0f, 0x23, 0, 0}},
	Movtab{AMOVL, Yml, Ynone, Ydr6, 4, [4]uint8{0x0f, 0x23, 6, 0}},
	Movtab{AMOVL, Yml, Ynone, Ydr7, 4, [4]uint8{0x0f, 0x23, 7, 0}},
	Movtab{AMOVQ, Yml, Ynone, Ydr0, 4, [4]uint8{0x0f, 0x23, 0, 0}},
	Movtab{AMOVQ, Yml, Ynone, Ydr6, 4, [4]uint8{0x0f, 0x23, 6, 0}},
	Movtab{AMOVQ, Yml, Ynone, Ydr7, 4, [4]uint8{0x0f, 0x23, 7, 0}},
2778 2779

	/* mov tr */
2780 2781 2782 2783
	Movtab{AMOVL, Ytr6, Ynone, Yml, 3, [4]uint8{0x0f, 0x24, 6, 0}},
	Movtab{AMOVL, Ytr7, Ynone, Yml, 3, [4]uint8{0x0f, 0x24, 7, 0}},
	Movtab{AMOVL, Yml, Ynone, Ytr6, 4, [4]uint8{0x0f, 0x26, 6, E}},
	Movtab{AMOVL, Yml, Ynone, Ytr7, 4, [4]uint8{0x0f, 0x26, 7, E}},
2784 2785

	/* lgdt, sgdt, lidt, sidt */
2786 2787 2788 2789 2790 2791 2792 2793
	Movtab{AMOVL, Ym, Ynone, Ygdtr, 4, [4]uint8{0x0f, 0x01, 2, 0}},
	Movtab{AMOVL, Ygdtr, Ynone, Ym, 3, [4]uint8{0x0f, 0x01, 0, 0}},
	Movtab{AMOVL, Ym, Ynone, Yidtr, 4, [4]uint8{0x0f, 0x01, 3, 0}},
	Movtab{AMOVL, Yidtr, Ynone, Ym, 3, [4]uint8{0x0f, 0x01, 1, 0}},
	Movtab{AMOVQ, Ym, Ynone, Ygdtr, 4, [4]uint8{0x0f, 0x01, 2, 0}},
	Movtab{AMOVQ, Ygdtr, Ynone, Ym, 3, [4]uint8{0x0f, 0x01, 0, 0}},
	Movtab{AMOVQ, Ym, Ynone, Yidtr, 4, [4]uint8{0x0f, 0x01, 3, 0}},
	Movtab{AMOVQ, Yidtr, Ynone, Ym, 3, [4]uint8{0x0f, 0x01, 1, 0}},
2794 2795

	/* lldt, sldt */
2796 2797
	Movtab{AMOVW, Yml, Ynone, Yldtr, 4, [4]uint8{0x0f, 0x00, 2, 0}},
	Movtab{AMOVW, Yldtr, Ynone, Yml, 3, [4]uint8{0x0f, 0x00, 0, 0}},
2798 2799

	/* lmsw, smsw */
2800 2801
	Movtab{AMOVW, Yml, Ynone, Ymsw, 4, [4]uint8{0x0f, 0x01, 6, 0}},
	Movtab{AMOVW, Ymsw, Ynone, Yml, 3, [4]uint8{0x0f, 0x01, 4, 0}},
2802 2803

	/* ltr, str */
2804 2805
	Movtab{AMOVW, Yml, Ynone, Ytask, 4, [4]uint8{0x0f, 0x00, 3, 0}},
	Movtab{AMOVW, Ytask, Ynone, Yml, 3, [4]uint8{0x0f, 0x00, 1, 0}},
2806

2807
	/* load full pointer - unsupported
2808 2809
	Movtab{AMOVL, Yml, Ycol, 5, [4]uint8{0, 0, 0, 0}},
	Movtab{AMOVW, Yml, Ycol, 5, [4]uint8{Pe, 0, 0, 0}},
2810
	*/
2811 2812

	/* double shift */
2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830
	Movtab{ASHLL, Yi8, Yrl, Yml, 6, [4]uint8{0xa4, 0xa5, 0, 0}},
	Movtab{ASHLL, Ycl, Yrl, Yml, 6, [4]uint8{0xa4, 0xa5, 0, 0}},
	Movtab{ASHLL, Ycx, Yrl, Yml, 6, [4]uint8{0xa4, 0xa5, 0, 0}},
	Movtab{ASHRL, Yi8, Yrl, Yml, 6, [4]uint8{0xac, 0xad, 0, 0}},
	Movtab{ASHRL, Ycl, Yrl, Yml, 6, [4]uint8{0xac, 0xad, 0, 0}},
	Movtab{ASHRL, Ycx, Yrl, Yml, 6, [4]uint8{0xac, 0xad, 0, 0}},
	Movtab{ASHLQ, Yi8, Yrl, Yml, 6, [4]uint8{Pw, 0xa4, 0xa5, 0}},
	Movtab{ASHLQ, Ycl, Yrl, Yml, 6, [4]uint8{Pw, 0xa4, 0xa5, 0}},
	Movtab{ASHLQ, Ycx, Yrl, Yml, 6, [4]uint8{Pw, 0xa4, 0xa5, 0}},
	Movtab{ASHRQ, Yi8, Yrl, Yml, 6, [4]uint8{Pw, 0xac, 0xad, 0}},
	Movtab{ASHRQ, Ycl, Yrl, Yml, 6, [4]uint8{Pw, 0xac, 0xad, 0}},
	Movtab{ASHRQ, Ycx, Yrl, Yml, 6, [4]uint8{Pw, 0xac, 0xad, 0}},
	Movtab{ASHLW, Yi8, Yrl, Yml, 6, [4]uint8{Pe, 0xa4, 0xa5, 0}},
	Movtab{ASHLW, Ycl, Yrl, Yml, 6, [4]uint8{Pe, 0xa4, 0xa5, 0}},
	Movtab{ASHLW, Ycx, Yrl, Yml, 6, [4]uint8{Pe, 0xa4, 0xa5, 0}},
	Movtab{ASHRW, Yi8, Yrl, Yml, 6, [4]uint8{Pe, 0xac, 0xad, 0}},
	Movtab{ASHRW, Ycl, Yrl, Yml, 6, [4]uint8{Pe, 0xac, 0xad, 0}},
	Movtab{ASHRW, Ycx, Yrl, Yml, 6, [4]uint8{Pe, 0xac, 0xad, 0}},
2831 2832

	/* load TLS base */
2833
	Movtab{AMOVL, Ytls, Ynone, Yrl, 7, [4]uint8{0, 0, 0, 0}},
2834 2835
	Movtab{AMOVQ, Ytls, Ynone, Yrl, 7, [4]uint8{0, 0, 0, 0}},
	Movtab{0, 0, 0, 0, 0, [4]uint8{}},
2836 2837
}

2838
func isax(a *obj.Addr) bool {
2839 2840 2841 2842
	switch a.Reg {
	case REG_AX,
		REG_AL,
		REG_AH:
2843
		return true
2844 2845
	}

2846
	if a.Index == REG_AX {
2847
		return true
2848
	}
2849
	return false
2850 2851 2852
}

func subreg(p *obj.Prog, from int, to int) {
2853
	if false { /* debug['Q'] */
2854 2855 2856
		fmt.Printf("\n%v\ts/%v/%v/\n", p, Rconv(from), Rconv(to))
	}

2857 2858 2859
	if int(p.From.Reg) == from {
		p.From.Reg = int16(to)
		p.Ft = 0
2860
	}
2861 2862 2863 2864

	if int(p.To.Reg) == from {
		p.To.Reg = int16(to)
		p.Tt = 0
2865 2866 2867
	}

	if int(p.From.Index) == from {
2868 2869
		p.From.Index = int16(to)
		p.Ft = 0
2870 2871
	}

2872 2873 2874
	if int(p.To.Index) == from {
		p.To.Index = int16(to)
		p.Tt = 0
2875 2876
	}

2877
	if false { /* debug['Q'] */
2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915
		fmt.Printf("%v\n", p)
	}
}

func mediaop(ctxt *obj.Link, o *Optab, op int, osize int, z int) int {
	switch op {
	case Pm,
		Pe,
		Pf2,
		Pf3:
		if osize != 1 {
			if op != Pm {
				ctxt.Andptr[0] = byte(op)
				ctxt.Andptr = ctxt.Andptr[1:]
			}
			ctxt.Andptr[0] = Pm
			ctxt.Andptr = ctxt.Andptr[1:]
			z++
			op = int(o.op[z])
			break
		}
		fallthrough

	default:
		if -cap(ctxt.Andptr) == -cap(ctxt.And) || ctxt.And[-cap(ctxt.Andptr)+cap(ctxt.And[:])-1] != Pm {
			ctxt.Andptr[0] = Pm
			ctxt.Andptr = ctxt.Andptr[1:]
		}
	}

	ctxt.Andptr[0] = byte(op)
	ctxt.Andptr = ctxt.Andptr[1:]
	return z
}

func doasm(ctxt *obj.Link, p *obj.Prog) {
	ctxt.Curp = p // TODO

2916
	o := opindex[p.As&obj.AMask]
2917 2918 2919 2920 2921 2922

	if o == nil {
		ctxt.Diag("asmins: missing op %v", p)
		return
	}

2923
	pre := prefixof(ctxt, p, &p.From)
2924 2925 2926 2927
	if pre != 0 {
		ctxt.Andptr[0] = byte(pre)
		ctxt.Andptr = ctxt.Andptr[1:]
	}
2928
	pre = prefixof(ctxt, p, &p.To)
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	if pre != 0 {
		ctxt.Andptr[0] = byte(pre)
		ctxt.Andptr = ctxt.Andptr[1:]
	}

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	// TODO(rsc): This special case is for SHRQ $3, AX:DX,
	// which encodes as SHRQ $32(DX*0), AX.
	// Similarly SHRQ CX, AX:DX is really SHRQ CX(DX*0), AX.
	// Change encoding generated by assemblers and compilers and remove.
	if (p.From.Type == obj.TYPE_CONST || p.From.Type == obj.TYPE_REG) && p.From.Index != REG_NONE && p.From.Scale == 0 {
		p.From3.Type = obj.TYPE_REG
		p.From3.Reg = p.From.Index
		p.From.Index = 0
	}

	// TODO(rsc): This special case is for PINSRQ etc, CMPSD etc.
	// Change encoding generated by assemblers and compilers (if any) and remove.
	switch p.As {
	case AIMUL3Q, APEXTRW, APINSRW, APINSRD, APINSRQ, APSHUFHW, APSHUFL, APSHUFW, ASHUFPD, ASHUFPS, AAESKEYGENASSIST, APSHUFD, APCLMULQDQ:
		if p.From3.Type == obj.TYPE_NONE {
			p.From3 = p.From
			p.From = obj.Addr{}
			p.From.Type = obj.TYPE_CONST
			p.From.Offset = p.To.Offset
			p.To.Offset = 0
		}
	case ACMPSD, ACMPSS, ACMPPS, ACMPPD:
		if p.From3.Type == obj.TYPE_NONE {
			p.From3 = p.To
			p.To = obj.Addr{}
			p.To.Type = obj.TYPE_CONST
			p.To.Offset = p.From3.Offset
			p.From3.Offset = 0
		}
	}

2965
	if p.Ft == 0 {
2966
		p.Ft = uint8(oclass(ctxt, p, &p.From))
2967
	}
2968 2969 2970
	if p.F3t == 0 {
		p.F3t = uint8(oclass(ctxt, p, &p.From3))
	}
2971
	if p.Tt == 0 {
2972
		p.Tt = uint8(oclass(ctxt, p, &p.To))
2973 2974
	}

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2975
	ft := int(p.Ft) * Ymax
2976
	f3t := int(p.F3t) * Ymax
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2977
	tt := int(p.Tt) * Ymax
2978

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	xo := bool2int(o.op[0] == 0x0f)
	z := 0
	var a *obj.Addr
	var l int
	var op int
	var q *obj.Prog
	var r *obj.Reloc
	var rel obj.Reloc
	var v int64
	var yt ytab
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	for _, yt = range o.ytab {
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		if ycover[ft+int(yt.from)] != 0 && ycover[f3t+int(yt.from3)] != 0 && ycover[tt+int(yt.to)] != 0 {
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			switch o.prefix {
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			case Px1: /* first option valid only in 32-bit mode */
				if ctxt.Mode == 64 && z == 0 {
					z += int(yt.zoffset) + xo
					continue
				}
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			case Pq: /* 16 bit escape and opcode escape */
				ctxt.Andptr[0] = Pe
				ctxt.Andptr = ctxt.Andptr[1:]
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				ctxt.Andptr[0] = Pm
				ctxt.Andptr = ctxt.Andptr[1:]
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			case Pq3: /* 16 bit escape, Rex.w, and opcode escape */
				ctxt.Andptr[0] = Pe
				ctxt.Andptr = ctxt.Andptr[1:]
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				ctxt.Andptr[0] = Pw
				ctxt.Andptr = ctxt.Andptr[1:]
				ctxt.Andptr[0] = Pm
				ctxt.Andptr = ctxt.Andptr[1:]
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			case Pf2, /* xmm opcode escape */
				Pf3:
				ctxt.Andptr[0] = byte(o.prefix)
				ctxt.Andptr = ctxt.Andptr[1:]
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				ctxt.Andptr[0] = Pm
				ctxt.Andptr = ctxt.Andptr[1:]
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			case Pm: /* opcode escape */
				ctxt.Andptr[0] = Pm
				ctxt.Andptr = ctxt.Andptr[1:]
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			case Pe: /* 16 bit escape */
				ctxt.Andptr[0] = Pe
				ctxt.Andptr = ctxt.Andptr[1:]
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			case Pw: /* 64-bit escape */
				if p.Mode != 64 {
					ctxt.Diag("asmins: illegal 64: %v", p)
				}
				ctxt.Rexflag |= Pw
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			case Pw8: /* 64-bit escape if z >= 8 */
				if z >= 8 {
					if p.Mode != 64 {
						ctxt.Diag("asmins: illegal 64: %v", p)
					}
					ctxt.Rexflag |= Pw
				}
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			case Pb: /* botch */
				if p.Mode != 64 && (isbadbyte(&p.From) || isbadbyte(&p.To)) {
					goto bad
				}
				// NOTE(rsc): This is probably safe to do always,
				// but when enabled it chooses different encodings
				// than the old cmd/internal/obj/i386 code did,
				// which breaks our "same bits out" checks.
				// In particular, CMPB AX, $0 encodes as 80 f8 00
				// in the original obj/i386, and it would encode
				// (using a valid, shorter form) as 3c 00 if we enabled
				// the call to bytereg here.
				if p.Mode == 64 {
					bytereg(&p.From, &p.Ft)
					bytereg(&p.To, &p.Tt)
				}
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			case P32: /* 32 bit but illegal if 64-bit mode */
				if p.Mode == 64 {
					ctxt.Diag("asmins: illegal in 64-bit mode: %v", p)
				}
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			case Py: /* 64-bit only, no prefix */
				if p.Mode != 64 {
					ctxt.Diag("asmins: illegal in %d-bit mode: %v", p.Mode, p)
				}
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			case Py1: /* 64-bit only if z < 1, no prefix */
				if z < 1 && p.Mode != 64 {
					ctxt.Diag("asmins: illegal in %d-bit mode: %v", p.Mode, p)
				}

			case Py3: /* 64-bit only if z < 3, no prefix */
				if z < 3 && p.Mode != 64 {
					ctxt.Diag("asmins: illegal in %d-bit mode: %v", p.Mode, p)
				}
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			}

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			if z >= len(o.op) {
				log.Fatalf("asmins bad table %v", p)
			}
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			op = int(o.op[z])
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			if op == 0x0f {
				ctxt.Andptr[0] = byte(op)
				ctxt.Andptr = ctxt.Andptr[1:]
				z++
				op = int(o.op[z])
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			}

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			switch yt.zcase {
			default:
				ctxt.Diag("asmins: unknown z %d %v", yt.zcase, p)
				return
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			case Zpseudo:
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				break

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			case Zlit:
				for ; ; z++ {
					op = int(o.op[z])
					if op == 0 {
						break
					}
					ctxt.Andptr[0] = byte(op)
					ctxt.Andptr = ctxt.Andptr[1:]
				}
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			case Zlitm_r:
				for ; ; z++ {
					op = int(o.op[z])
					if op == 0 {
						break
					}
					ctxt.Andptr[0] = byte(op)
					ctxt.Andptr = ctxt.Andptr[1:]
				}
				asmand(ctxt, p, &p.From, &p.To)
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			case Zmb_r:
				bytereg(&p.From, &p.Ft)
				fallthrough
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				/* fall through */
			case Zm_r:
				ctxt.Andptr[0] = byte(op)
				ctxt.Andptr = ctxt.Andptr[1:]
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				asmand(ctxt, p, &p.From, &p.To)
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			case Zm2_r:
				ctxt.Andptr[0] = byte(op)
				ctxt.Andptr = ctxt.Andptr[1:]
				ctxt.Andptr[0] = byte(o.op[z+1])
				ctxt.Andptr = ctxt.Andptr[1:]
				asmand(ctxt, p, &p.From, &p.To)
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			case Zm_r_xm:
				mediaop(ctxt, o, op, int(yt.zoffset), z)
				asmand(ctxt, p, &p.From, &p.To)
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			case Zm_r_xm_nr:
				ctxt.Rexflag = 0
				mediaop(ctxt, o, op, int(yt.zoffset), z)
				asmand(ctxt, p, &p.From, &p.To)
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			case Zm_r_i_xm:
				mediaop(ctxt, o, op, int(yt.zoffset), z)
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				asmand(ctxt, p, &p.From, &p.From3)
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				ctxt.Andptr[0] = byte(p.To.Offset)
				ctxt.Andptr = ctxt.Andptr[1:]
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			case Zm_r_3d:
				ctxt.Andptr[0] = 0x0f
				ctxt.Andptr = ctxt.Andptr[1:]
				ctxt.Andptr[0] = 0x0f
				ctxt.Andptr = ctxt.Andptr[1:]
				asmand(ctxt, p, &p.From, &p.To)
				ctxt.Andptr[0] = byte(op)
				ctxt.Andptr = ctxt.Andptr[1:]
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			case Zibm_r:
				for {
					tmp1 := z
					z++
					op = int(o.op[tmp1])
					if op == 0 {
						break
					}
					ctxt.Andptr[0] = byte(op)
					ctxt.Andptr = ctxt.Andptr[1:]
				}
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				asmand(ctxt, p, &p.From3, &p.To)
				ctxt.Andptr[0] = byte(p.From.Offset)
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				ctxt.Andptr = ctxt.Andptr[1:]
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			case Zaut_r:
				ctxt.Andptr[0] = 0x8d
				ctxt.Andptr = ctxt.Andptr[1:] /* leal */
				if p.From.Type != obj.TYPE_ADDR {
					ctxt.Diag("asmins: Zaut sb type ADDR")
				}
				p.From.Type = obj.TYPE_MEM
				asmand(ctxt, p, &p.From, &p.To)
				p.From.Type = obj.TYPE_ADDR
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			case Zm_o:
				ctxt.Andptr[0] = byte(op)
				ctxt.Andptr = ctxt.Andptr[1:]
				asmando(ctxt, p, &p.From, int(o.op[z+1]))
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			case Zr_m:
				ctxt.Andptr[0] = byte(op)
				ctxt.Andptr = ctxt.Andptr[1:]
				asmand(ctxt, p, &p.To, &p.From)
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			case Zr_m_xm:
				mediaop(ctxt, o, op, int(yt.zoffset), z)
				asmand(ctxt, p, &p.To, &p.From)
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			case Zr_m_xm_nr:
				ctxt.Rexflag = 0
				mediaop(ctxt, o, op, int(yt.zoffset), z)
				asmand(ctxt, p, &p.To, &p.From)
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			case Zo_m:
				ctxt.Andptr[0] = byte(op)
				ctxt.Andptr = ctxt.Andptr[1:]
				asmando(ctxt, p, &p.To, int(o.op[z+1]))
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			case Zcallindreg:
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				r = obj.Addrel(ctxt.Cursym)
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				r.Off = int32(p.Pc)
				r.Type = obj.R_CALLIND
				r.Siz = 0
				fallthrough
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			case Zo_m64:
				ctxt.Andptr[0] = byte(op)
				ctxt.Andptr = ctxt.Andptr[1:]
				asmandsz(ctxt, p, &p.To, int(o.op[z+1]), 0, 1)
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			case Zm_ibo:
				ctxt.Andptr[0] = byte(op)
				ctxt.Andptr = ctxt.Andptr[1:]
				asmando(ctxt, p, &p.From, int(o.op[z+1]))
				ctxt.Andptr[0] = byte(vaddr(ctxt, p, &p.To, nil))
				ctxt.Andptr = ctxt.Andptr[1:]
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			case Zibo_m:
				ctxt.Andptr[0] = byte(op)
				ctxt.Andptr = ctxt.Andptr[1:]
				asmando(ctxt, p, &p.To, int(o.op[z+1]))
				ctxt.Andptr[0] = byte(vaddr(ctxt, p, &p.From, nil))
				ctxt.Andptr = ctxt.Andptr[1:]
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			case Zibo_m_xm:
				z = mediaop(ctxt, o, op, int(yt.zoffset), z)
				asmando(ctxt, p, &p.To, int(o.op[z+1]))
				ctxt.Andptr[0] = byte(vaddr(ctxt, p, &p.From, nil))
				ctxt.Andptr = ctxt.Andptr[1:]
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			case Z_ib,
				Zib_:
				if yt.zcase == Zib_ {
					a = &p.From
				} else {
					a = &p.To
				}
				ctxt.Andptr[0] = byte(op)
				ctxt.Andptr = ctxt.Andptr[1:]
				ctxt.Andptr[0] = byte(vaddr(ctxt, p, a, nil))
				ctxt.Andptr = ctxt.Andptr[1:]
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			case Zib_rp:
				ctxt.Rexflag |= regrex[p.To.Reg] & (Rxb | 0x40)
				ctxt.Andptr[0] = byte(op + reg[p.To.Reg])
				ctxt.Andptr = ctxt.Andptr[1:]
				ctxt.Andptr[0] = byte(vaddr(ctxt, p, &p.From, nil))
				ctxt.Andptr = ctxt.Andptr[1:]
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			case Zil_rp:
				ctxt.Rexflag |= regrex[p.To.Reg] & Rxb
				ctxt.Andptr[0] = byte(op + reg[p.To.Reg])
				ctxt.Andptr = ctxt.Andptr[1:]
				if o.prefix == Pe {
					v = vaddr(ctxt, p, &p.From, nil)
					ctxt.Andptr[0] = byte(v)
					ctxt.Andptr = ctxt.Andptr[1:]
					ctxt.Andptr[0] = byte(v >> 8)
					ctxt.Andptr = ctxt.Andptr[1:]
				} else {
					relput4(ctxt, p, &p.From)
				}
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			case Zo_iw:
				ctxt.Andptr[0] = byte(op)
				ctxt.Andptr = ctxt.Andptr[1:]
				if p.From.Type != obj.TYPE_NONE {
					v = vaddr(ctxt, p, &p.From, nil)
					ctxt.Andptr[0] = byte(v)
					ctxt.Andptr = ctxt.Andptr[1:]
					ctxt.Andptr[0] = byte(v >> 8)
					ctxt.Andptr = ctxt.Andptr[1:]
				}
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			case Ziq_rp:
				v = vaddr(ctxt, p, &p.From, &rel)
				l = int(v >> 32)
				if l == 0 && rel.Siz != 8 {
					//p->mark |= 0100;
					//print("zero: %llux %P\n", v, p);
					ctxt.Rexflag &^= (0x40 | Rxw)
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					ctxt.Rexflag |= regrex[p.To.Reg] & Rxb
					ctxt.Andptr[0] = byte(0xb8 + reg[p.To.Reg])
					ctxt.Andptr = ctxt.Andptr[1:]
					if rel.Type != 0 {
						r = obj.Addrel(ctxt.Cursym)
						*r = rel
						r.Off = int32(p.Pc + int64(-cap(ctxt.Andptr)+cap(ctxt.And[:])))
					}
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					put4(ctxt, int32(v))
				} else if l == -1 && uint64(v)&(uint64(1)<<31) != 0 { /* sign extend */
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					//p->mark |= 0100;
					//print("sign: %llux %P\n", v, p);
					ctxt.Andptr[0] = 0xc7
					ctxt.Andptr = ctxt.Andptr[1:]
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					asmando(ctxt, p, &p.To, 0)
					put4(ctxt, int32(v)) /* need all 8 */
				} else {
					//print("all: %llux %P\n", v, p);
					ctxt.Rexflag |= regrex[p.To.Reg] & Rxb
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					ctxt.Andptr[0] = byte(op + reg[p.To.Reg])
					ctxt.Andptr = ctxt.Andptr[1:]
					if rel.Type != 0 {
						r = obj.Addrel(ctxt.Cursym)
						*r = rel
						r.Off = int32(p.Pc + int64(-cap(ctxt.Andptr)+cap(ctxt.And[:])))
					}
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					put8(ctxt, v)
				}
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			case Zib_rr:
				ctxt.Andptr[0] = byte(op)
				ctxt.Andptr = ctxt.Andptr[1:]
				asmand(ctxt, p, &p.To, &p.To)
				ctxt.Andptr[0] = byte(vaddr(ctxt, p, &p.From, nil))
				ctxt.Andptr = ctxt.Andptr[1:]
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			case Z_il,
				Zil_:
				if yt.zcase == Zil_ {
					a = &p.From
				} else {
					a = &p.To
				}
				ctxt.Andptr[0] = byte(op)
				ctxt.Andptr = ctxt.Andptr[1:]
				if o.prefix == Pe {
					v = vaddr(ctxt, p, a, nil)
					ctxt.Andptr[0] = byte(v)
					ctxt.Andptr = ctxt.Andptr[1:]
					ctxt.Andptr[0] = byte(v >> 8)
					ctxt.Andptr = ctxt.Andptr[1:]
				} else {
					relput4(ctxt, p, a)
				}
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			case Zm_ilo,
				Zilo_m:
				ctxt.Andptr[0] = byte(op)
				ctxt.Andptr = ctxt.Andptr[1:]
				if yt.zcase == Zilo_m {
					a = &p.From
					asmando(ctxt, p, &p.To, int(o.op[z+1]))
				} else {
					a = &p.To
					asmando(ctxt, p, &p.From, int(o.op[z+1]))
				}
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				if o.prefix == Pe {
					v = vaddr(ctxt, p, a, nil)
					ctxt.Andptr[0] = byte(v)
					ctxt.Andptr = ctxt.Andptr[1:]
					ctxt.Andptr[0] = byte(v >> 8)
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					ctxt.Andptr = ctxt.Andptr[1:]
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				} else {
					relput4(ctxt, p, a)
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				}
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			case Zil_rr:
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				ctxt.Andptr[0] = byte(op)
				ctxt.Andptr = ctxt.Andptr[1:]
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				asmand(ctxt, p, &p.To, &p.To)
				if o.prefix == Pe {
					v = vaddr(ctxt, p, &p.From, nil)
					ctxt.Andptr[0] = byte(v)
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					ctxt.Andptr = ctxt.Andptr[1:]
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					ctxt.Andptr[0] = byte(v >> 8)
					ctxt.Andptr = ctxt.Andptr[1:]
				} else {
					relput4(ctxt, p, &p.From)
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				}

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			case Z_rp:
				ctxt.Rexflag |= regrex[p.To.Reg] & (Rxb | 0x40)
				ctxt.Andptr[0] = byte(op + reg[p.To.Reg])
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				ctxt.Andptr = ctxt.Andptr[1:]
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			case Zrp_:
				ctxt.Rexflag |= regrex[p.From.Reg] & (Rxb | 0x40)
				ctxt.Andptr[0] = byte(op + reg[p.From.Reg])
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				ctxt.Andptr = ctxt.Andptr[1:]
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			case Zclr:
				ctxt.Rexflag &^= Pw
				ctxt.Andptr[0] = byte(op)
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				ctxt.Andptr = ctxt.Andptr[1:]
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				asmand(ctxt, p, &p.To, &p.To)

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			case Zcallcon, Zjmpcon:
				if yt.zcase == Zcallcon {
					ctxt.Andptr[0] = byte(op)
					ctxt.Andptr = ctxt.Andptr[1:]
				} else {
					ctxt.Andptr[0] = byte(o.op[z+1])
					ctxt.Andptr = ctxt.Andptr[1:]
				}
				r = obj.Addrel(ctxt.Cursym)
				r.Off = int32(p.Pc + int64(-cap(ctxt.Andptr)+cap(ctxt.And[:])))
				r.Type = obj.R_PCREL
				r.Siz = 4
				r.Add = p.To.Offset
				put4(ctxt, 0)

			case Zcallind:
				ctxt.Andptr[0] = byte(op)
				ctxt.Andptr = ctxt.Andptr[1:]
				ctxt.Andptr[0] = byte(o.op[z+1])
				ctxt.Andptr = ctxt.Andptr[1:]
				r = obj.Addrel(ctxt.Cursym)
				r.Off = int32(p.Pc + int64(-cap(ctxt.Andptr)+cap(ctxt.And[:])))
				r.Type = obj.R_ADDR
				r.Siz = 4
				r.Add = p.To.Offset
				r.Sym = p.To.Sym
				put4(ctxt, 0)

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			case Zcall:
				if p.To.Sym == nil {
					ctxt.Diag("call without target")
					log.Fatalf("bad code")
				}

				ctxt.Andptr[0] = byte(op)
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				ctxt.Andptr = ctxt.Andptr[1:]
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				r = obj.Addrel(ctxt.Cursym)
				r.Off = int32(p.Pc + int64(-cap(ctxt.Andptr)+cap(ctxt.And[:])))
				r.Sym = p.To.Sym
				r.Add = p.To.Offset
				r.Type = obj.R_CALL
				r.Siz = 4
				put4(ctxt, 0)

				// TODO: jump across functions needs reloc
			case Zbr,
				Zjmp,
				Zloop:
				if p.To.Sym != nil {
					if yt.zcase != Zjmp {
						ctxt.Diag("branch to ATEXT")
						log.Fatalf("bad code")
					}
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					ctxt.Andptr[0] = byte(o.op[z+1])
					ctxt.Andptr = ctxt.Andptr[1:]
					r = obj.Addrel(ctxt.Cursym)
					r.Off = int32(p.Pc + int64(-cap(ctxt.Andptr)+cap(ctxt.And[:])))
					r.Sym = p.To.Sym
					r.Type = obj.R_PCREL
					r.Siz = 4
					put4(ctxt, 0)
					break
				}
3472

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				// Assumes q is in this function.
				// TODO: Check in input, preserve in brchain.
3475

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				// Fill in backward jump now.
				q = p.Pcond
3478

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				if q == nil {
					ctxt.Diag("jmp/branch/loop without target")
					log.Fatalf("bad code")
				}
3483

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				if p.Back&1 != 0 {
					v = q.Pc - (p.Pc + 2)
					if v >= -128 {
						if p.As == AJCXZL {
							ctxt.Andptr[0] = 0x67
							ctxt.Andptr = ctxt.Andptr[1:]
						}
						ctxt.Andptr[0] = byte(op)
						ctxt.Andptr = ctxt.Andptr[1:]
						ctxt.Andptr[0] = byte(v)
						ctxt.Andptr = ctxt.Andptr[1:]
					} else if yt.zcase == Zloop {
						ctxt.Diag("loop too far: %v", p)
					} else {
						v -= 5 - 2
						if yt.zcase == Zbr {
							ctxt.Andptr[0] = 0x0f
							ctxt.Andptr = ctxt.Andptr[1:]
							v--
						}

						ctxt.Andptr[0] = byte(o.op[z+1])
						ctxt.Andptr = ctxt.Andptr[1:]
						ctxt.Andptr[0] = byte(v)
						ctxt.Andptr = ctxt.Andptr[1:]
						ctxt.Andptr[0] = byte(v >> 8)
						ctxt.Andptr = ctxt.Andptr[1:]
						ctxt.Andptr[0] = byte(v >> 16)
						ctxt.Andptr = ctxt.Andptr[1:]
						ctxt.Andptr[0] = byte(v >> 24)
						ctxt.Andptr = ctxt.Andptr[1:]
					}
3516

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					break
				}
3519

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				// Annotate target; will fill in later.
				p.Forwd = q.Comefrom

				q.Comefrom = p
				if p.Back&2 != 0 { // short
					if p.As == AJCXZL {
						ctxt.Andptr[0] = 0x67
						ctxt.Andptr = ctxt.Andptr[1:]
					}
					ctxt.Andptr[0] = byte(op)
					ctxt.Andptr = ctxt.Andptr[1:]
					ctxt.Andptr[0] = 0
3532
					ctxt.Andptr = ctxt.Andptr[1:]
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				} else if yt.zcase == Zloop {
					ctxt.Diag("loop too far: %v", p)
				} else {
					if yt.zcase == Zbr {
						ctxt.Andptr[0] = 0x0f
						ctxt.Andptr = ctxt.Andptr[1:]
					}
					ctxt.Andptr[0] = byte(o.op[z+1])
					ctxt.Andptr = ctxt.Andptr[1:]
					ctxt.Andptr[0] = 0
					ctxt.Andptr = ctxt.Andptr[1:]
					ctxt.Andptr[0] = 0
3545
					ctxt.Andptr = ctxt.Andptr[1:]
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					ctxt.Andptr[0] = 0
3547
					ctxt.Andptr = ctxt.Andptr[1:]
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					ctxt.Andptr[0] = 0
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					ctxt.Andptr = ctxt.Andptr[1:]
				}
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				break

			/*
				v = q->pc - p->pc - 2;
				if((v >= -128 && v <= 127) || p->pc == -1 || q->pc == -1) {
					*ctxt->andptr++ = op;
					*ctxt->andptr++ = v;
				} else {
					v -= 5-2;
					if(yt.zcase == Zbr) {
						*ctxt->andptr++ = 0x0f;
						v--;
					}
					*ctxt->andptr++ = o->op[z+1];
					*ctxt->andptr++ = v;
					*ctxt->andptr++ = v>>8;
					*ctxt->andptr++ = v>>16;
					*ctxt->andptr++ = v>>24;
				}
			*/

			case Zbyte:
				v = vaddr(ctxt, p, &p.From, &rel)
				if rel.Siz != 0 {
					rel.Siz = uint8(op)
					r = obj.Addrel(ctxt.Cursym)
					*r = rel
					r.Off = int32(p.Pc + int64(-cap(ctxt.Andptr)+cap(ctxt.And[:])))
				}

				ctxt.Andptr[0] = byte(v)
				ctxt.Andptr = ctxt.Andptr[1:]
				if op > 1 {
					ctxt.Andptr[0] = byte(v >> 8)
					ctxt.Andptr = ctxt.Andptr[1:]
					if op > 2 {
						ctxt.Andptr[0] = byte(v >> 16)
						ctxt.Andptr = ctxt.Andptr[1:]
						ctxt.Andptr[0] = byte(v >> 24)
						ctxt.Andptr = ctxt.Andptr[1:]
						if op > 4 {
							ctxt.Andptr[0] = byte(v >> 32)
							ctxt.Andptr = ctxt.Andptr[1:]
							ctxt.Andptr[0] = byte(v >> 40)
							ctxt.Andptr = ctxt.Andptr[1:]
							ctxt.Andptr[0] = byte(v >> 48)
							ctxt.Andptr = ctxt.Andptr[1:]
							ctxt.Andptr[0] = byte(v >> 56)
							ctxt.Andptr = ctxt.Andptr[1:]
						}
					}
				}
3604
			}
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			return
3607
		}
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3608
		z += int(yt.zoffset) + xo
3609
	}
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3610
	for mo := ymovtab; mo[0].as != 0; mo = mo[1:] {
3611 3612
		var pp obj.Prog
		var t []byte
3613
		if p.As == mo[0].as {
3614
			if ycover[ft+int(mo[0].ft)] != 0 && ycover[f3t+int(mo[0].f3t)] != 0 && ycover[tt+int(mo[0].tt)] != 0 {
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				t = mo[0].op[:]
				switch mo[0].code {
				default:
					ctxt.Diag("asmins: unknown mov %d %v", mo[0].code, p)

				case 0: /* lit */
					for z = 0; t[z] != E; z++ {
						ctxt.Andptr[0] = t[z]
						ctxt.Andptr = ctxt.Andptr[1:]
					}
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				case 1: /* r,m */
					ctxt.Andptr[0] = t[0]
					ctxt.Andptr = ctxt.Andptr[1:]
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3630 3631 3632 3633 3634
					asmando(ctxt, p, &p.To, int(t[1]))

				case 2: /* m,r */
					ctxt.Andptr[0] = t[0]
					ctxt.Andptr = ctxt.Andptr[1:]
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3636
					asmando(ctxt, p, &p.From, int(t[1]))
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				case 3: /* r,m - 2op */
					ctxt.Andptr[0] = t[0]
					ctxt.Andptr = ctxt.Andptr[1:]
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					ctxt.Andptr[0] = t[1]
					ctxt.Andptr = ctxt.Andptr[1:]
					asmando(ctxt, p, &p.To, int(t[2]))
					ctxt.Rexflag |= regrex[p.From.Reg] & (Rxr | 0x40)
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				case 4: /* m,r - 2op */
					ctxt.Andptr[0] = t[0]
					ctxt.Andptr = ctxt.Andptr[1:]
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					ctxt.Andptr[0] = t[1]
					ctxt.Andptr = ctxt.Andptr[1:]
					asmando(ctxt, p, &p.From, int(t[2]))
					ctxt.Rexflag |= regrex[p.To.Reg] & (Rxr | 0x40)
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				case 5: /* load full pointer, trash heap */
					if t[0] != 0 {
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						ctxt.Andptr[0] = t[0]
						ctxt.Andptr = ctxt.Andptr[1:]
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					}
					switch p.To.Index {
					default:
						goto bad
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					case REG_DS:
						ctxt.Andptr[0] = 0xc5
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						ctxt.Andptr = ctxt.Andptr[1:]

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					case REG_SS:
						ctxt.Andptr[0] = 0x0f
						ctxt.Andptr = ctxt.Andptr[1:]
						ctxt.Andptr[0] = 0xb2
						ctxt.Andptr = ctxt.Andptr[1:]
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					case REG_ES:
						ctxt.Andptr[0] = 0xc4
						ctxt.Andptr = ctxt.Andptr[1:]
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					case REG_FS:
						ctxt.Andptr[0] = 0x0f
						ctxt.Andptr = ctxt.Andptr[1:]
						ctxt.Andptr[0] = 0xb4
						ctxt.Andptr = ctxt.Andptr[1:]
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					case REG_GS:
						ctxt.Andptr[0] = 0x0f
						ctxt.Andptr = ctxt.Andptr[1:]
						ctxt.Andptr[0] = 0xb5
						ctxt.Andptr = ctxt.Andptr[1:]
					}
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3691

3692
					asmand(ctxt, p, &p.From, &p.To)
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				case 6: /* double shift */
					if t[0] == Pw {
						if p.Mode != 64 {
							ctxt.Diag("asmins: illegal 64: %v", p)
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3698
						}
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						ctxt.Rexflag |= Pw
						t = t[1:]
					} else if t[0] == Pe {
						ctxt.Andptr[0] = Pe
						ctxt.Andptr = ctxt.Andptr[1:]
						t = t[1:]
					}
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					switch p.From.Type {
					default:
						goto bad
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					case obj.TYPE_CONST:
						ctxt.Andptr[0] = 0x0f
						ctxt.Andptr = ctxt.Andptr[1:]
						ctxt.Andptr[0] = t[0]
						ctxt.Andptr = ctxt.Andptr[1:]
						asmandsz(ctxt, p, &p.To, reg[p.From3.Reg], regrex[p.From3.Reg], 0)
						ctxt.Andptr[0] = byte(p.From.Offset)
						ctxt.Andptr = ctxt.Andptr[1:]

					case obj.TYPE_REG:
						switch p.From.Reg {
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						default:
							goto bad

3725
						case REG_CL, REG_CX:
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							ctxt.Andptr[0] = 0x0f
							ctxt.Andptr = ctxt.Andptr[1:]
3728
							ctxt.Andptr[0] = t[1]
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3729
							ctxt.Andptr = ctxt.Andptr[1:]
3730
							asmandsz(ctxt, p, &p.To, reg[p.From3.Reg], regrex[p.From3.Reg], 0)
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						}
3732
					}
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				// NOTE: The systems listed here are the ones that use the "TLS initial exec" model,
				// where you load the TLS base register into a register and then index off that
				// register to access the actual TLS variables. Systems that allow direct TLS access
				// are handled in prefixof above and should not be listed here.
				case 7: /* mov tls, r */
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					if p.Mode == 64 && p.As != AMOVQ || p.Mode == 32 && p.As != AMOVL {
						ctxt.Diag("invalid load of TLS: %v", p)
					}

					if p.Mode == 32 {
						// NOTE: The systems listed here are the ones that use the "TLS initial exec" model,
						// where you load the TLS base register into a register and then index off that
						// register to access the actual TLS variables. Systems that allow direct TLS access
						// are handled in prefixof above and should not be listed here.
						switch ctxt.Headtype {
						default:
							log.Fatalf("unknown TLS base location for %s", obj.Headstr(ctxt.Headtype))

						case obj.Hlinux,
							obj.Hnacl:
							// ELF TLS base is 0(GS).
							pp.From = p.From

							pp.From.Type = obj.TYPE_MEM
							pp.From.Reg = REG_GS
							pp.From.Offset = 0
							pp.From.Index = REG_NONE
							pp.From.Scale = 0
							ctxt.Andptr[0] = 0x65
							ctxt.Andptr = ctxt.Andptr[1:] // GS
							ctxt.Andptr[0] = 0x8B
							ctxt.Andptr = ctxt.Andptr[1:]
							asmand(ctxt, p, &pp.From, &p.To)

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						case obj.Hlinux:
							if ctxt.Flag_shared == 0 {
								log.Fatalf("unknown TLS base location for linux without -shared")
							}
							// Note that this is not generating the same insn as the other cases.
							//     MOV TLS, R_to
							// becomes
							//     movq g@gottpoff(%rip), R_to
							// which is encoded as
							//     movq 0(%rip), R_to
							// and a R_TLS_IE reloc. This all assumes the only tls variable we access
							// is g, which we can't check here, but will when we assemble the second
							// instruction.
							ctxt.Rexflag = Pw | (regrex[p.To.Reg] & Rxr)

							ctxt.Andptr[0] = 0x8B
							ctxt.Andptr = ctxt.Andptr[1:]
							ctxt.Andptr[0] = byte(0x05 | (reg[p.To.Reg] << 3))
							ctxt.Andptr = ctxt.Andptr[1:]
							r = obj.Addrel(ctxt.Cursym)
							r.Off = int32(p.Pc + int64(-cap(ctxt.Andptr)+cap(ctxt.And[:])))
							r.Type = obj.R_TLS_IE
							r.Siz = 4
							r.Add = -4
							ctxt.Andptr[0] = 0x00
							ctxt.Andptr = ctxt.Andptr[1:]
							ctxt.Andptr[0] = 0x00
							ctxt.Andptr = ctxt.Andptr[1:]
							ctxt.Andptr[0] = 0x00
							ctxt.Andptr = ctxt.Andptr[1:]
							ctxt.Andptr[0] = 0x00
							ctxt.Andptr = ctxt.Andptr[1:]

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						case obj.Hplan9:
							if ctxt.Plan9privates == nil {
								ctxt.Plan9privates = obj.Linklookup(ctxt, "_privates", 0)
							}
							pp.From = obj.Addr{}
							pp.From.Type = obj.TYPE_MEM
							pp.From.Name = obj.NAME_EXTERN
							pp.From.Sym = ctxt.Plan9privates
							pp.From.Offset = 0
							pp.From.Index = REG_NONE
							ctxt.Andptr[0] = 0x8B
							ctxt.Andptr = ctxt.Andptr[1:]
							asmand(ctxt, p, &pp.From, &p.To)

						case obj.Hwindows:
							// Windows TLS base is always 0x14(FS).
							pp.From = p.From

							pp.From.Type = obj.TYPE_MEM
							pp.From.Reg = REG_FS
							pp.From.Offset = 0x14
							pp.From.Index = REG_NONE
							pp.From.Scale = 0
							ctxt.Andptr[0] = 0x64
							ctxt.Andptr = ctxt.Andptr[1:] // FS
							ctxt.Andptr[0] = 0x8B
							ctxt.Andptr = ctxt.Andptr[1:]
							asmand(ctxt, p, &pp.From, &p.To)
						}
						break
					}

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					switch ctxt.Headtype {
					default:
						log.Fatalf("unknown TLS base location for %s", obj.Headstr(ctxt.Headtype))

					case obj.Hplan9:
						if ctxt.Plan9privates == nil {
							ctxt.Plan9privates = obj.Linklookup(ctxt, "_privates", 0)
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						}
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						pp.From = obj.Addr{}
						pp.From.Type = obj.TYPE_MEM
						pp.From.Name = obj.NAME_EXTERN
						pp.From.Sym = ctxt.Plan9privates
						pp.From.Offset = 0
						pp.From.Index = REG_NONE
						ctxt.Rexflag |= Pw
						ctxt.Andptr[0] = 0x8B
						ctxt.Andptr = ctxt.Andptr[1:]
						asmand(ctxt, p, &pp.From, &p.To)

					case obj.Hsolaris: // TODO(rsc): Delete Hsolaris from list. Should not use this code. See progedit in obj6.c.
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						// TLS base is 0(FS).
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						pp.From = p.From

						pp.From.Type = obj.TYPE_MEM
						pp.From.Name = obj.NAME_NONE
						pp.From.Reg = REG_NONE
						pp.From.Offset = 0
						pp.From.Index = REG_NONE
						pp.From.Scale = 0
						ctxt.Rexflag |= Pw
						ctxt.Andptr[0] = 0x64
						ctxt.Andptr = ctxt.Andptr[1:] // FS
						ctxt.Andptr[0] = 0x8B
						ctxt.Andptr = ctxt.Andptr[1:]
						asmand(ctxt, p, &pp.From, &p.To)

					case obj.Hwindows:
3870
						// Windows TLS base is always 0x28(GS).
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						pp.From = p.From

						pp.From.Type = obj.TYPE_MEM
						pp.From.Name = obj.NAME_NONE
						pp.From.Reg = REG_GS
						pp.From.Offset = 0x28
						pp.From.Index = REG_NONE
						pp.From.Scale = 0
						ctxt.Rexflag |= Pw
						ctxt.Andptr[0] = 0x65
						ctxt.Andptr = ctxt.Andptr[1:] // GS
						ctxt.Andptr[0] = 0x8B
						ctxt.Andptr = ctxt.Andptr[1:]
						asmand(ctxt, p, &pp.From, &p.To)
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					}
3886
				}
3887
				return
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			}
		}
	}
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	goto bad
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bad:
	if p.Mode != 64 {
		/*
		 * here, the assembly has failed.
		 * if its a byte instruction that has
		 * unaddressable registers, try to
		 * exchange registers and reissue the
		 * instruction with the operands renamed.
		 */
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		pp := *p
3903

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		unbytereg(&pp.From, &pp.Ft)
		unbytereg(&pp.To, &pp.Tt)

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		z := int(p.From.Reg)
3908
		if p.From.Type == obj.TYPE_REG && z >= REG_BP && z <= REG_DI {
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			// TODO(rsc): Use this code for x86-64 too. It has bug fixes not present in the amd64 code base.
			// For now, different to keep bit-for-bit compatibility.
			if p.Mode == 32 {
				breg := byteswapreg(ctxt, &p.To)
				if breg != REG_AX {
					ctxt.Andptr[0] = 0x87
					ctxt.Andptr = ctxt.Andptr[1:] /* xchg lhs,bx */
					asmando(ctxt, p, &p.From, reg[breg])
					subreg(&pp, z, breg)
					doasm(ctxt, &pp)
					ctxt.Andptr[0] = 0x87
					ctxt.Andptr = ctxt.Andptr[1:] /* xchg lhs,bx */
					asmando(ctxt, p, &p.From, reg[breg])
				} else {
					ctxt.Andptr[0] = byte(0x90 + reg[z])
					ctxt.Andptr = ctxt.Andptr[1:] /* xchg lsh,ax */
					subreg(&pp, z, REG_AX)
					doasm(ctxt, &pp)
					ctxt.Andptr[0] = byte(0x90 + reg[z])
					ctxt.Andptr = ctxt.Andptr[1:] /* xchg lsh,ax */
				}
				return
			}

3933
			if isax(&p.To) || p.To.Type == obj.TYPE_NONE {
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				// We certainly don't want to exchange
				// with AX if the op is MUL or DIV.
				ctxt.Andptr[0] = 0x87
				ctxt.Andptr = ctxt.Andptr[1:] /* xchg lhs,bx */
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				asmando(ctxt, p, &p.From, reg[REG_BX])
				subreg(&pp, z, REG_BX)
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				doasm(ctxt, &pp)
				ctxt.Andptr[0] = 0x87
				ctxt.Andptr = ctxt.Andptr[1:] /* xchg lhs,bx */
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				asmando(ctxt, p, &p.From, reg[REG_BX])
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			} else {
				ctxt.Andptr[0] = byte(0x90 + reg[z])
				ctxt.Andptr = ctxt.Andptr[1:] /* xchg lsh,ax */
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				subreg(&pp, z, REG_AX)
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				doasm(ctxt, &pp)
				ctxt.Andptr[0] = byte(0x90 + reg[z])
				ctxt.Andptr = ctxt.Andptr[1:] /* xchg lsh,ax */
			}
			return
		}

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		z = int(p.To.Reg)
		if p.To.Type == obj.TYPE_REG && z >= REG_BP && z <= REG_DI {
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			// TODO(rsc): Use this code for x86-64 too. It has bug fixes not present in the amd64 code base.
			// For now, different to keep bit-for-bit compatibility.
			if p.Mode == 32 {
				breg := byteswapreg(ctxt, &p.From)
				if breg != REG_AX {
					ctxt.Andptr[0] = 0x87
					ctxt.Andptr = ctxt.Andptr[1:] /* xchg rhs,bx */
					asmando(ctxt, p, &p.To, reg[breg])
					subreg(&pp, z, breg)
					doasm(ctxt, &pp)
					ctxt.Andptr[0] = 0x87
					ctxt.Andptr = ctxt.Andptr[1:] /* xchg rhs,bx */
					asmando(ctxt, p, &p.To, reg[breg])
				} else {
					ctxt.Andptr[0] = byte(0x90 + reg[z])
					ctxt.Andptr = ctxt.Andptr[1:] /* xchg rsh,ax */
					subreg(&pp, z, REG_AX)
					doasm(ctxt, &pp)
					ctxt.Andptr[0] = byte(0x90 + reg[z])
					ctxt.Andptr = ctxt.Andptr[1:] /* xchg rsh,ax */
				}
				return
			}

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			if isax(&p.From) {
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				ctxt.Andptr[0] = 0x87
				ctxt.Andptr = ctxt.Andptr[1:] /* xchg rhs,bx */
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				asmando(ctxt, p, &p.To, reg[REG_BX])
				subreg(&pp, z, REG_BX)
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				doasm(ctxt, &pp)
				ctxt.Andptr[0] = 0x87
				ctxt.Andptr = ctxt.Andptr[1:] /* xchg rhs,bx */
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				asmando(ctxt, p, &p.To, reg[REG_BX])
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			} else {
				ctxt.Andptr[0] = byte(0x90 + reg[z])
				ctxt.Andptr = ctxt.Andptr[1:] /* xchg rsh,ax */
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				subreg(&pp, z, REG_AX)
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				doasm(ctxt, &pp)
				ctxt.Andptr[0] = byte(0x90 + reg[z])
				ctxt.Andptr = ctxt.Andptr[1:] /* xchg rsh,ax */
			}
			return
		}
	}

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	ctxt.Diag("doasm: notfound ft=%d tt=%d %v %d %d", p.Ft, p.Tt, p, oclass(ctxt, p, &p.From), oclass(ctxt, p, &p.To))
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	return
}

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// byteswapreg returns a byte-addressable register (AX, BX, CX, DX)
// which is not referenced in a.
// If a is empty, it returns BX to account for MULB-like instructions
// that might use DX and AX.
func byteswapreg(ctxt *obj.Link, a *obj.Addr) int {
	cand := 1
	canc := cand
	canb := canc
	cana := canb

	if a.Type == obj.TYPE_NONE {
		cand = 0
		cana = cand
	}

	if a.Type == obj.TYPE_REG || ((a.Type == obj.TYPE_MEM || a.Type == obj.TYPE_ADDR) && a.Name == obj.NAME_NONE) {
		switch a.Reg {
		case REG_NONE:
			cand = 0
			cana = cand

		case REG_AX,
			REG_AL,
			REG_AH:
			cana = 0

		case REG_BX,
			REG_BL,
			REG_BH:
			canb = 0

		case REG_CX,
			REG_CL,
			REG_CH:
			canc = 0

		case REG_DX,
			REG_DL,
			REG_DH:
			cand = 0
		}
	}

	if a.Type == obj.TYPE_MEM || a.Type == obj.TYPE_ADDR {
		switch a.Index {
		case REG_AX:
			cana = 0

		case REG_BX:
			canb = 0

		case REG_CX:
			canc = 0

		case REG_DX:
			cand = 0
		}
	}

	if cana != 0 {
		return REG_AX
	}
	if canb != 0 {
		return REG_BX
	}
	if canc != 0 {
		return REG_CX
	}
	if cand != 0 {
		return REG_DX
	}

	ctxt.Diag("impossible byte register")
	log.Fatalf("bad code")
	return 0
}

func isbadbyte(a *obj.Addr) bool {
	return a.Type == obj.TYPE_REG && (REG_BP <= a.Reg && a.Reg <= REG_DI || REG_BPB <= a.Reg && a.Reg <= REG_DIB)
}

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var naclret = []uint8{
	0x5e, // POPL SI
	// 0x8b, 0x7d, 0x00, // MOVL (BP), DI - catch return to invalid address, for debugging
	0x83,
	0xe6,
	0xe0, // ANDL $~31, SI
	0x4c,
	0x01,
	0xfe, // ADDQ R15, SI
	0xff,
	0xe6, // JMP SI
}

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var naclret8 = []uint8{
	0x5d, // POPL BP
	// 0x8b, 0x7d, 0x00, // MOVL (BP), DI - catch return to invalid address, for debugging
	0x83,
	0xe5,
	0xe0, // ANDL $~31, BP
	0xff,
	0xe5, // JMP BP
}

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var naclspfix = []uint8{0x4c, 0x01, 0xfc} // ADDQ R15, SP

var naclbpfix = []uint8{0x4c, 0x01, 0xfd} // ADDQ R15, BP

var naclmovs = []uint8{
	0x89,
	0xf6, // MOVL SI, SI
	0x49,
	0x8d,
	0x34,
	0x37, // LEAQ (R15)(SI*1), SI
	0x89,
	0xff, // MOVL DI, DI
	0x49,
	0x8d,
	0x3c,
	0x3f, // LEAQ (R15)(DI*1), DI
}

var naclstos = []uint8{
	0x89,
	0xff, // MOVL DI, DI
	0x49,
	0x8d,
	0x3c,
	0x3f, // LEAQ (R15)(DI*1), DI
}

func nacltrunc(ctxt *obj.Link, reg int) {
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	if reg >= REG_R8 {
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		ctxt.Andptr[0] = 0x45
		ctxt.Andptr = ctxt.Andptr[1:]
	}
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	reg = (reg - REG_AX) & 7
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	ctxt.Andptr[0] = 0x89
	ctxt.Andptr = ctxt.Andptr[1:]
	ctxt.Andptr[0] = byte(3<<6 | reg<<3 | reg)
	ctxt.Andptr = ctxt.Andptr[1:]
}

func asmins(ctxt *obj.Link, p *obj.Prog) {
	ctxt.Andptr = ctxt.And[:]
	ctxt.Asmode = int(p.Mode)

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	if p.As == obj.AUSEFIELD {
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		r := obj.Addrel(ctxt.Cursym)
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		r.Off = 0
		r.Siz = 0
		r.Sym = p.From.Sym
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		r.Type = obj.R_USEFIELD
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		return
	}

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	if ctxt.Headtype == obj.Hnacl && p.Mode == 32 {
		switch p.As {
		case obj.ARET:
			copy(ctxt.Andptr, naclret8)
			ctxt.Andptr = ctxt.Andptr[len(naclret8):]
			return

		case obj.ACALL,
			obj.AJMP:
			if p.To.Type == obj.TYPE_REG && REG_AX <= p.To.Reg && p.To.Reg <= REG_DI {
				ctxt.Andptr[0] = 0x83
				ctxt.Andptr = ctxt.Andptr[1:]
				ctxt.Andptr[0] = byte(0xe0 | (p.To.Reg - REG_AX))
				ctxt.Andptr = ctxt.Andptr[1:]
				ctxt.Andptr[0] = 0xe0
				ctxt.Andptr = ctxt.Andptr[1:]
			}

		case AINT:
			ctxt.Andptr[0] = 0xf4
			ctxt.Andptr = ctxt.Andptr[1:]
			return
		}
	}

	if ctxt.Headtype == obj.Hnacl && p.Mode == 64 {
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		if p.As == AREP {
			ctxt.Rep++
			return
		}

		if p.As == AREPN {
			ctxt.Repn++
			return
		}

		if p.As == ALOCK {
			ctxt.Lock++
			return
		}

		if p.As != ALEAQ && p.As != ALEAL {
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			if p.From.Index != obj.TYPE_NONE && p.From.Scale > 0 {
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				nacltrunc(ctxt, int(p.From.Index))
			}
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			if p.To.Index != obj.TYPE_NONE && p.To.Scale > 0 {
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				nacltrunc(ctxt, int(p.To.Index))
			}
		}

		switch p.As {
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		case obj.ARET:
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			copy(ctxt.Andptr, naclret)
			ctxt.Andptr = ctxt.Andptr[len(naclret):]
			return

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		case obj.ACALL,
			obj.AJMP:
			if p.To.Type == obj.TYPE_REG && REG_AX <= p.To.Reg && p.To.Reg <= REG_DI {
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				// ANDL $~31, reg
				ctxt.Andptr[0] = 0x83
				ctxt.Andptr = ctxt.Andptr[1:]

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				ctxt.Andptr[0] = byte(0xe0 | (p.To.Reg - REG_AX))
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				ctxt.Andptr = ctxt.Andptr[1:]
				ctxt.Andptr[0] = 0xe0
				ctxt.Andptr = ctxt.Andptr[1:]

				// ADDQ R15, reg
				ctxt.Andptr[0] = 0x4c
				ctxt.Andptr = ctxt.Andptr[1:]

				ctxt.Andptr[0] = 0x01
				ctxt.Andptr = ctxt.Andptr[1:]
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				ctxt.Andptr[0] = byte(0xf8 | (p.To.Reg - REG_AX))
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				ctxt.Andptr = ctxt.Andptr[1:]
			}

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			if p.To.Type == obj.TYPE_REG && REG_R8 <= p.To.Reg && p.To.Reg <= REG_R15 {
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				// ANDL $~31, reg
				ctxt.Andptr[0] = 0x41
				ctxt.Andptr = ctxt.Andptr[1:]

				ctxt.Andptr[0] = 0x83
				ctxt.Andptr = ctxt.Andptr[1:]
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				ctxt.Andptr[0] = byte(0xe0 | (p.To.Reg - REG_R8))
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				ctxt.Andptr = ctxt.Andptr[1:]
				ctxt.Andptr[0] = 0xe0
				ctxt.Andptr = ctxt.Andptr[1:]

				// ADDQ R15, reg
				ctxt.Andptr[0] = 0x4d
				ctxt.Andptr = ctxt.Andptr[1:]

				ctxt.Andptr[0] = 0x01
				ctxt.Andptr = ctxt.Andptr[1:]
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				ctxt.Andptr[0] = byte(0xf8 | (p.To.Reg - REG_R8))
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				ctxt.Andptr = ctxt.Andptr[1:]
			}

		case AINT:
			ctxt.Andptr[0] = 0xf4
			ctxt.Andptr = ctxt.Andptr[1:]
			return

		case ASCASB,
			ASCASW,
			ASCASL,
			ASCASQ,
			ASTOSB,
			ASTOSW,
			ASTOSL,
			ASTOSQ:
			copy(ctxt.Andptr, naclstos)
			ctxt.Andptr = ctxt.Andptr[len(naclstos):]

		case AMOVSB,
			AMOVSW,
			AMOVSL,
			AMOVSQ:
			copy(ctxt.Andptr, naclmovs)
			ctxt.Andptr = ctxt.Andptr[len(naclmovs):]
		}

		if ctxt.Rep != 0 {
			ctxt.Andptr[0] = 0xf3
			ctxt.Andptr = ctxt.Andptr[1:]
			ctxt.Rep = 0
		}

		if ctxt.Repn != 0 {
			ctxt.Andptr[0] = 0xf2
			ctxt.Andptr = ctxt.Andptr[1:]
			ctxt.Repn = 0
		}

		if ctxt.Lock != 0 {
			ctxt.Andptr[0] = 0xf0
			ctxt.Andptr = ctxt.Andptr[1:]
			ctxt.Lock = 0
		}
	}

	ctxt.Rexflag = 0
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4307
	and0 := ctxt.Andptr
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	ctxt.Asmode = int(p.Mode)
	doasm(ctxt, p)
	if ctxt.Rexflag != 0 {
		/*
		 * as befits the whole approach of the architecture,
		 * the rex prefix must appear before the first opcode byte
		 * (and thus after any 66/67/f2/f3/26/2e/3e prefix bytes, but
		 * before the 0f opcode escape!), or it might be ignored.
		 * note that the handbook often misleadingly shows 66/f2/f3 in `opcode'.
		 */
		if p.Mode != 64 {
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			ctxt.Diag("asmins: illegal in mode %d: %v (%d %d)", p.Mode, p, p.Ft, p.Tt)
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		}
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		n := -cap(ctxt.Andptr) + cap(and0)
		var c int
		var np int
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		for np = 0; np < n; np++ {
			c = int(and0[np])
			if c != 0xf2 && c != 0xf3 && (c < 0x64 || c > 0x67) && c != 0x2e && c != 0x3e && c != 0x26 {
				break
			}
		}

		copy(and0[np+1:], and0[np:n])
		and0[np] = byte(0x40 | ctxt.Rexflag)
		ctxt.Andptr = ctxt.Andptr[1:]
	}

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	n := -cap(ctxt.Andptr) + cap(ctxt.And[:])
	var r *obj.Reloc
	for i := len(ctxt.Cursym.R) - 1; i >= 0; i-- {
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		r = &ctxt.Cursym.R[i:][0]
		if int64(r.Off) < p.Pc {
			break
		}
		if ctxt.Rexflag != 0 {
			r.Off++
		}
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		if r.Type == obj.R_PCREL || r.Type == obj.R_CALL {
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			r.Add -= p.Pc + int64(n) - (int64(r.Off) + int64(r.Siz))
		}
	}

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	if p.Mode == 64 && ctxt.Headtype == obj.Hnacl && p.As != ACMPL && p.As != ACMPQ && p.To.Type == obj.TYPE_REG {
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		switch p.To.Reg {
		case REG_SP:
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			copy(ctxt.Andptr, naclspfix)
			ctxt.Andptr = ctxt.Andptr[len(naclspfix):]

4357
		case REG_BP:
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			copy(ctxt.Andptr, naclbpfix)
			ctxt.Andptr = ctxt.Andptr[len(naclbpfix):]
		}
	}
}