Commit 1f2930cb authored by Matthew Dempsky's avatar Matthew Dempsky

cmd/compile: remove traces of old register allocator

Only added lines are moving amd64 and x86's ginsnop functions from
gsubr.go to ggen.go to match other architectures, so all of the
gsubr.go files can go away.

Change-Id: Ib2292460c155ae6d9dcf5c9801f178031d8eea7a
Reviewed-on: https://go-review.googlesource.com/29240
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarDave Cheney <dave@cheney.net>
parent ae7e0ad7
......@@ -18,13 +18,6 @@ func betypeinit() {
if obj.GOARCH == "amd64p32" {
leaptr = x86.ALEAL
}
if gc.Ctxt.Flag_dynlink || obj.GOOS == "nacl" {
resvd = append(resvd, x86.REG_R15)
}
if gc.Ctxt.Framepointer_enabled || obj.GOOS == "nacl" {
resvd = append(resvd, x86.REG_BP)
}
gc.Thearch.ReservedRegs = resvd
}
func Main() {
......@@ -34,13 +27,6 @@ func Main() {
}
gc.Thearch.REGSP = x86.REGSP
gc.Thearch.REGCTXT = x86.REGCTXT
gc.Thearch.REGCALLX = x86.REG_BX
gc.Thearch.REGCALLX2 = x86.REG_AX
gc.Thearch.REGRETURN = x86.REG_AX
gc.Thearch.REGMIN = x86.REG_AX
gc.Thearch.REGMAX = x86.REG_R15
gc.Thearch.FREGMIN = x86.REG_X0
gc.Thearch.FREGMAX = x86.REG_X15
gc.Thearch.MAXWIDTH = 1 << 50
gc.Thearch.Betypeinit = betypeinit
......
......@@ -165,3 +165,14 @@ func zerorange(p *obj.Prog, frame int64, lo int64, hi int64, ax *uint32, x0 *uin
return p
}
func ginsnop() {
// This is actually not the x86 NOP anymore,
// but at the point where it gets used, AX is dead
// so it's okay if we lose the high bits.
p := gc.Prog(x86.AXCHGL)
p.From.Type = obj.TYPE_REG
p.From.Reg = x86.REG_AX
p.To.Type = obj.TYPE_REG
p.To.Reg = x86.REG_AX
}
// Derived from Inferno utils/6c/txt.c
// https://bitbucket.org/inferno-os/inferno-os/src/default/utils/6c/txt.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 amd64
import (
"cmd/compile/internal/gc"
"cmd/internal/obj"
"cmd/internal/obj/x86"
)
var resvd = []int{
x86.REG_DI, // for movstring
x86.REG_SI, // for movstring
x86.REG_AX, // for divide
x86.REG_CX, // for shift
x86.REG_DX, // for divide
x86.REG_SP, // for stack
}
func ginsnop() {
// This is actually not the x86 NOP anymore,
// but at the point where it gets used, AX is dead
// so it's okay if we lose the high bits.
p := gc.Prog(x86.AXCHGL)
p.From.Type = obj.TYPE_REG
p.From.Reg = x86.REG_AX
p.To.Type = obj.TYPE_REG
p.To.Reg = x86.REG_AX
}
......@@ -17,15 +17,7 @@ func Main() {
gc.Thearch.LinkArch = &arm.Linkarm
gc.Thearch.REGSP = arm.REGSP
gc.Thearch.REGCTXT = arm.REGCTXT
gc.Thearch.REGCALLX = arm.REG_R1
gc.Thearch.REGCALLX2 = arm.REG_R2
gc.Thearch.REGRETURN = arm.REG_R0
gc.Thearch.REGMIN = arm.REG_R0
gc.Thearch.REGMAX = arm.REGEXT
gc.Thearch.FREGMIN = arm.REG_F0
gc.Thearch.FREGMAX = arm.FREGEXT
gc.Thearch.MAXWIDTH = (1 << 32) - 1
gc.Thearch.ReservedRegs = resvd
gc.Thearch.Betypeinit = betypeinit
gc.Thearch.Defframe = defframe
......
// Derived from Inferno utils/5c/txt.c
// https://bitbucket.org/inferno-os/inferno-os/src/default/utils/5c/txt.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 arm
import "cmd/internal/obj/arm"
var resvd = []int{
arm.REG_R9, // formerly reserved for m; might be okay to reuse now; not sure about NaCl
arm.REG_R10, // reserved for g
}
......@@ -17,16 +17,7 @@ func Main() {
gc.Thearch.LinkArch = &arm64.Linkarm64
gc.Thearch.REGSP = arm64.REGSP
gc.Thearch.REGCTXT = arm64.REGCTXT
gc.Thearch.REGCALLX = arm64.REGRT1
gc.Thearch.REGCALLX2 = arm64.REGRT2
gc.Thearch.REGRETURN = arm64.REG_R0
gc.Thearch.REGMIN = arm64.REG_R0
gc.Thearch.REGMAX = arm64.REG_R31
gc.Thearch.REGZERO = arm64.REGZERO
gc.Thearch.FREGMIN = arm64.REG_F0
gc.Thearch.FREGMAX = arm64.REG_F31
gc.Thearch.MAXWIDTH = 1 << 50
gc.Thearch.ReservedRegs = resvd
gc.Thearch.Betypeinit = betypeinit
gc.Thearch.Defframe = defframe
......
// Derived from Inferno utils/6c/txt.c
// https://bitbucket.org/inferno-os/inferno-os/src/default/utils/6c/txt.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 arm64
import "cmd/internal/obj/arm64"
var resvd = []int{
arm64.REGTMP,
arm64.REGG,
arm64.REGRT1,
arm64.REGRT2,
arm64.REG_R31, // REGZERO and REGSP
}
......@@ -355,18 +355,9 @@ const (
type Arch struct {
LinkArch *obj.LinkArch
REGSP int
REGCTXT int
REGCALLX int // BX
REGCALLX2 int // AX
REGRETURN int // AX
REGMIN int
REGMAX int
REGZERO int // architectural zero register, if available
FREGMIN int
FREGMAX int
MAXWIDTH int64
ReservedRegs []int
REGSP int
REGCTXT int
MAXWIDTH int64
Betypeinit func()
Defframe func(*obj.Prog)
......
......@@ -21,15 +21,7 @@ func Main() {
}
gc.Thearch.REGSP = mips.REGSP
gc.Thearch.REGCTXT = mips.REGCTXT
gc.Thearch.REGCALLX = mips.REG_R1
gc.Thearch.REGCALLX2 = mips.REG_R2
gc.Thearch.REGRETURN = mips.REGRET
gc.Thearch.REGMIN = mips.REG_R0
gc.Thearch.REGMAX = mips.REG_R31
gc.Thearch.FREGMIN = mips.REG_F0
gc.Thearch.FREGMAX = mips.REG_F31
gc.Thearch.MAXWIDTH = 1 << 50
gc.Thearch.ReservedRegs = resvd
gc.Thearch.Betypeinit = betypeinit
gc.Thearch.Defframe = defframe
......
// Derived from Inferno utils/6c/txt.c
// https://bitbucket.org/inferno-os/inferno-os/src/default/utils/6c/txt.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 mips64
import "cmd/internal/obj/mips"
var resvd = []int{
mips.REGZERO,
mips.REGSP, // reserved for SP
mips.REGSB, // reserved for SB
mips.REGLINK, // reserved for link
mips.REGG,
mips.REGTMP,
mips.REG_R26, // kernel
mips.REG_R27, // kernel
}
......@@ -11,10 +11,6 @@ import (
)
func betypeinit() {
if gc.Ctxt.Flag_shared {
gc.Thearch.ReservedRegs = append(gc.Thearch.ReservedRegs, ppc64.REG_R2)
gc.Thearch.ReservedRegs = append(gc.Thearch.ReservedRegs, ppc64.REG_R12)
}
}
func Main() {
......@@ -24,15 +20,7 @@ func Main() {
}
gc.Thearch.REGSP = ppc64.REGSP
gc.Thearch.REGCTXT = ppc64.REGCTXT
gc.Thearch.REGCALLX = ppc64.REG_R3
gc.Thearch.REGCALLX2 = ppc64.REG_R4
gc.Thearch.REGRETURN = ppc64.REG_R3
gc.Thearch.REGMIN = ppc64.REG_R0
gc.Thearch.REGMAX = ppc64.REG_R31
gc.Thearch.FREGMIN = ppc64.REG_F0
gc.Thearch.FREGMAX = ppc64.REG_F31
gc.Thearch.MAXWIDTH = 1 << 50
gc.Thearch.ReservedRegs = resvd
gc.Thearch.Betypeinit = betypeinit
gc.Thearch.Defframe = defframe
......
// Derived from Inferno utils/6c/txt.c
// https://bitbucket.org/inferno-os/inferno-os/src/default/utils/6c/txt.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 ppc64
import "cmd/internal/obj/ppc64"
var resvd = []int{
ppc64.REGZERO,
ppc64.REGSP, // reserved for SP
// We need to preserve the C ABI TLS pointer because sigtramp
// may happen during C code and needs to access the g. C
// clobbers REGG, so if Go were to clobber REGTLS, sigtramp
// won't know which convention to use. By preserving REGTLS,
// we can just retrieve g from TLS when we aren't sure.
ppc64.REGTLS,
// TODO(austin): Consolidate REGTLS and REGG?
ppc64.REGG,
ppc64.REGTMP, // REGTMP
}
......@@ -16,15 +16,7 @@ func Main() {
gc.Thearch.LinkArch = &s390x.Links390x
gc.Thearch.REGSP = s390x.REGSP
gc.Thearch.REGCTXT = s390x.REGCTXT
gc.Thearch.REGCALLX = s390x.REG_R3
gc.Thearch.REGCALLX2 = s390x.REG_R4
gc.Thearch.REGRETURN = s390x.REG_R3
gc.Thearch.REGMIN = s390x.REG_R0
gc.Thearch.REGMAX = s390x.REG_R15
gc.Thearch.FREGMIN = s390x.REG_F0
gc.Thearch.FREGMAX = s390x.REG_F15
gc.Thearch.MAXWIDTH = 1 << 50
gc.Thearch.ReservedRegs = resvd
gc.Thearch.Betypeinit = betypeinit
gc.Thearch.Defframe = defframe
......
// Derived from Inferno utils/6c/txt.c
// https://bitbucket.org/inferno-os/inferno-os/src/default/utils/6c/txt.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 s390x
import "cmd/internal/obj/s390x"
var resvd = []int{
s390x.REGZERO, // R0
s390x.REGTMP, // R10
s390x.REGTMP2, // R11
s390x.REGCTXT, // R12
s390x.REGG, // R13
s390x.REG_LR, // R14
s390x.REGSP, // R15
}
......@@ -19,25 +19,15 @@ func Main() {
gc.Thearch.LinkArch = &x86.Link386
gc.Thearch.REGSP = x86.REGSP
gc.Thearch.REGCTXT = x86.REGCTXT
gc.Thearch.REGCALLX = x86.REG_BX
gc.Thearch.REGCALLX2 = x86.REG_AX
gc.Thearch.REGRETURN = x86.REG_AX
gc.Thearch.REGMIN = x86.REG_AX
gc.Thearch.REGMAX = x86.REG_DI
switch v := obj.GO386; v {
case "387":
gc.Thearch.FREGMIN = x86.REG_F0
gc.Thearch.FREGMAX = x86.REG_F7
gc.Thearch.Use387 = true
case "sse2":
gc.Thearch.FREGMIN = x86.REG_X0
gc.Thearch.FREGMAX = x86.REG_X7
default:
fmt.Fprintf(os.Stderr, "unsupported setting GO386=%s\n", v)
gc.Exit(1)
}
gc.Thearch.MAXWIDTH = (1 << 32) - 1
gc.Thearch.ReservedRegs = resvd
gc.Thearch.Betypeinit = betypeinit
gc.Thearch.Defframe = defframe
......
......@@ -83,3 +83,11 @@ func zerorange(p *obj.Prog, frame int64, lo int64, hi int64, ax *uint32) *obj.Pr
return p
}
func ginsnop() {
p := gc.Prog(x86.AXCHGL)
p.From.Type = obj.TYPE_REG
p.From.Reg = x86.REG_AX
p.To.Type = obj.TYPE_REG
p.To.Reg = x86.REG_AX
}
// Derived from Inferno utils/8c/txt.c
// https://bitbucket.org/inferno-os/inferno-os/src/default/utils/8c/txt.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/compile/internal/gc"
"cmd/internal/obj"
"cmd/internal/obj/x86"
)
var resvd = []int{
// REG_DI, // for movstring
// REG_SI, // for movstring
x86.REG_AX, // for divide
x86.REG_CX, // for shift
x86.REG_DX, // for divide, context
x86.REG_SP, // for stack
}
func ginsnop() {
p := gc.Prog(x86.AXCHGL)
p.From.Type = obj.TYPE_REG
p.From.Reg = x86.REG_AX
p.To.Type = obj.TYPE_REG
p.To.Reg = x86.REG_AX
}
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