cmd/6a, cmd/6l: add support for AES-NI instrutions and PSHUFD

This CL adds support for the these 7 new instructions to 6a/6l in
preparation of the upcoming CL for AES-NI accelerated crypto/aes:
AESENC, AESENCLAST, AESDEC, AESDECLAST, AESIMC, AESKEYGENASSIST,
and PSHUFD.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5970055

src/cmd/6a/lex.c

@@ -1008,6 +1008,13 @@ struct
 	"PREFETCHT2",		LTYPE2,	APREFETCHT2,
 	"PREFETCHNTA",		LTYPE2,	APREFETCHNTA,
 	"UNDEF",	LTYPE0,	AUNDEF,
+	"AESENC",	LTYPE3,	AAESENC,
+	"AESENCLAST",	LTYPE3, AAESENCLAST,
+	"AESDEC",	LTYPE3, AAESDEC,
+	"AESDECLAST",	LTYPE3, AAESDECLAST,
+	"AESIMC",	LTYPE3, AAESIMC,
+	"AESKEYGENASSIST", LTYPEX, AAESKEYGENASSIST,
+	"PSHUFD", LTYPEX, APSHUFD,
 
 	0
 };

src/cmd/6l/6.out.h

@@ -748,6 +748,15 @@ enum	as
 	
 	AUNDEF,
 
+	AAESENC,
+	AAESENCLAST,
+	AAESDEC,
+	AAESDECLAST,
+	AAESIMC,
+	AAESKEYGENASSIST,
+
+	APSHUFD,
+
 	ALAST
 };
 

src/cmd/6l/optab.c

@@ -269,7 +269,7 @@ uchar	yimul[] =
 };
 uchar	yimul3[] =
 {
-	Yml,	Yrl,	Zibm_r,	1,
+	Yml,	Yrl,	Zibm_r,	2,
 	0
 };
 uchar	ybyte[] =
@@ -518,17 +518,17 @@ uchar	ymrxr[] =
 };
 uchar	ymshuf[] =
 {
-	Ymm,	Ymr,	Zibm_r,	1,
+	Ymm,	Ymr,	Zibm_r,	2,
 	0
 };
 uchar	yxshuf[] =
 {
-	Yxm,	Yxr,	Zibm_r,	1,
+	Yxm,	Yxr,	Zibm_r,	2,
 	0
 };
 uchar	yextrw[] =
 {
-	Yxr,	Yrl,	Zibm_r,	1,
+	Yxr,	Yrl,	Zibm_r,	2,
 	0
 };
 uchar	ypsdq[] =
@@ -551,6 +551,16 @@ uchar	yprefetch[] =
 	Ym,	Ynone,	Zm_o,	2,
 	0,
 };
+uchar	yaes[] =
+{
+	Yxm,	Yxr,	Zlitm_r,	2,
+	0
+};
+uchar	yaes2[] =
+{
+	Yxm,	Yxr,	Zibm_r,	2,
+	0
+};
 
 /*
  * You are doasm, holding in your hand a Prog* with p->as set to, say, ACRC32,
@@ -791,7 +801,7 @@ Optab optab[] =
 	{ AIMULL,	yimul,	Px, 0xf7,(05),0x6b,0x69,Pm,0xaf },
 	{ AIMULQ,	yimul,	Pw, 0xf7,(05),0x6b,0x69,Pm,0xaf },
 	{ AIMULW,	yimul,	Pe, 0xf7,(05),0x6b,0x69,Pm,0xaf },
-	{ AIMUL3Q,	yimul3,	Pw, 0x6b },
+	{ AIMUL3Q,	yimul3,	Pw, 0x6b,(00) },
 	{ AINB,		yin,	Pb, 0xe4,0xec },
 	{ AINCB,	yincb,	Pb, 0xfe,(00) },
 	{ AINCL,	yincl,	Px, 0xff,(00) },
@@ -950,7 +960,7 @@ Optab optab[] =
 	{ APCMPGTB,	ymm,	Py, 0x64,Pe,0x64 },
 	{ APCMPGTL,	ymm,	Py, 0x66,Pe,0x66 },
 	{ APCMPGTW,	ymm,	Py, 0x65,Pe,0x65 },
-	{ APEXTRW,	yextrw,	Pq, 0xc5 },
+	{ APEXTRW,	yextrw,	Pq, 0xc5,(00) },
 	{ APF2IL,	ymfp,	Px, 0x1d },
 	{ APF2IW,	ymfp,	Px, 0x1c },
 	{ API2FL,	ymfp,	Px, 0x0d },
@@ -971,7 +981,7 @@ Optab optab[] =
 	{ APFRSQRT,	ymfp,	Px, 0x97 },
 	{ APFSUB,	ymfp,	Px, 0x9a },
 	{ APFSUBR,	ymfp,	Px, 0xaa },
-	{ APINSRW,	yextrw,	Pq, 0xc4 },
+	{ APINSRW,	yextrw,	Pq, 0xc4,(00) },
 	{ APMADDWL,	ymm,	Py, 0xf5,Pe,0xf5 },
 	{ APMAXSW,	yxm,	Pe, 0xee },
 	{ APMAXUB,	yxm,	Pe, 0xde },
@@ -993,10 +1003,10 @@ Optab optab[] =
 	{ APOPW,	ypopl,	Pe, 0x58,0x8f,(00) },
 	{ APOR,		ymm,	Py, 0xeb,Pe,0xeb },
 	{ APSADBW,	yxm,	Pq, 0xf6 },
-	{ APSHUFHW,	yxshuf,	Pf3, 0x70 },
-	{ APSHUFL,	yxshuf,	Pq, 0x70 },
-	{ APSHUFLW,	yxshuf,	Pf2, 0x70 },
-	{ APSHUFW,	ymshuf,	Pm, 0x70 },
+	{ APSHUFHW,	yxshuf,	Pf3, 0x70,(00) },
+	{ APSHUFL,	yxshuf,	Pq, 0x70,(00) },
+	{ APSHUFLW,	yxshuf,	Pf2, 0x70,(00) },
+	{ APSHUFW,	ymshuf,	Pm, 0x70,(00) },
 	{ APSLLO,	ypsdq,	Pq, 0x73,(07) },
 	{ APSLLL,	yps,	Py, 0xf2, 0x72,(06), Pe,0xf2, Pe,0x72,(06) },
 	{ APSLLQ,	yps,	Py, 0xf3, 0x73,(06), Pe,0xf3, Pe,0x73,(06) },
@@ -1101,8 +1111,8 @@ Optab optab[] =
 	{ ASHRL,	yshl,	Px, 0xd1,(05),0xc1,(05),0xd3,(05),0xd3,(05) },
 	{ ASHRQ,	yshl,	Pw, 0xd1,(05),0xc1,(05),0xd3,(05),0xd3,(05) },
 	{ ASHRW,	yshl,	Pe, 0xd1,(05),0xc1,(05),0xd3,(05),0xd3,(05) },
-	{ ASHUFPD,	yxshuf,	Pq, 0xc6 },
-	{ ASHUFPS,	yxshuf,	Pm, 0xc6 },
+	{ ASHUFPD,	yxshuf,	Pq, 0xc6,(00) },
+	{ ASHUFPS,	yxshuf,	Pm, 0xc6,(00) },
 	{ ASQRTPD,	yxm,	Pe, 0x51 },
 	{ ASQRTPS,	yxm,	Pm, 0x51 },
 	{ ASQRTSD,	yxm,	Pf2, 0x51 },
@@ -1296,6 +1306,15 @@ Optab optab[] =
 
 	{ AUNDEF,		ynone,	Px, 0x0f, 0x0b },
 
+	{ AAESENC,	yaes,	Pq, 0x38,0xdc,(0) },
+	{ AAESENCLAST,	yaes,	Pq, 0x38,0xdd,(0) },
+	{ AAESDEC,	yaes,	Pq, 0x38,0xde,(0) },
+	{ AAESDECLAST,	yaes,	Pq, 0x38,0xdf,(0) },
+	{ AAESIMC,	yaes,	Pq, 0x38,0xdb,(0) },
+	{ AAESKEYGENASSIST,	yaes2,	Pq, 0x3a,0xdf,(0) },
+
+	{ APSHUFD,	yaes2,	Pq,	0x70,(0) },
+
 	{ AEND },
 	0
 };

src/cmd/6l/span.c

@@ -1247,6 +1247,7 @@ found:
 		break;
 
 	case Zibm_r:
+		while ((op = o->op[z++]) != 0)
 			*andptr++ = op;
 		asmand(&p->from, &p->to);
 		*andptr++ = p->to.offset;