cmd/asm: add amd64 PAB{SB,SD,SW}, PMADDUBSW, PMULHRSW, PSIG{NB,ND,NW}

instructions

1st change out of 3 to cover AMD64 SSSE3 instruction set in Go asm.
This commit adds instructions that do not require new named ytab sets.

Change-Id: I0c3dfd8d39c3daa8b7683ab163c63145626d042e
Reviewed-on: https://go-review.googlesource.com/56834
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ilya Tocar <ilya.tocar@intel.com>
Reviewed-by: Russ Cox <rsc@golang.org>

src/cmd/internal/obj/x86/a.out.go

@@ -188,6 +188,9 @@ const (
 	AOUTSB
 	AOUTSL
 	AOUTSW
+	APABSB
+	APABSD
+	APABSW
 	APAUSE
 	APOPAL
 	APOPAW
@@ -652,6 +655,7 @@ const (
 	APINSRD
 	APINSRQ
 	APINSRW
+	APMADDUBSW
 	APMADDWL
 	APMAXSW
 	APMAXUB
@@ -671,6 +675,7 @@ const (
 	APMOVZXWD
 	APMOVZXWQ
 	APMULDQ
+	APMULHRSW
 	APMULHUW
 	APMULHW
 	APMULLD
@@ -683,6 +688,9 @@ const (
 	APSHUFL
 	APSHUFLW
 	APSHUFW
+	APSIGNB
+	APSIGND
+	APSIGNW
 	APSLLL
 	APSLLO
 	APSLLQ

src/cmd/internal/obj/x86/anames.go

@@ -150,6 +150,9 @@ var Anames = []string{
 	"OUTSB",
 	"OUTSL",
 	"OUTSW",
+	"PABSB",
+	"PABSD",
+	"PABSW",
 	"PAUSE",
 	"POPAL",
 	"POPAW",
@@ -595,6 +598,7 @@ var Anames = []string{
 	"PINSRD",
 	"PINSRQ",
 	"PINSRW",
+	"PMADDUBSW",
 	"PMADDWL",
 	"PMAXSW",
 	"PMAXUB",
@@ -614,6 +618,7 @@ var Anames = []string{
 	"PMOVZXWD",
 	"PMOVZXWQ",
 	"PMULDQ",
+	"PMULHRSW",
 	"PMULHUW",
 	"PMULHW",
 	"PMULLD",
@@ -626,6 +631,9 @@ var Anames = []string{
 	"PSHUFL",
 	"PSHUFLW",
 	"PSHUFW",
+	"PSIGNB",
+	"PSIGND",
+	"PSIGNW",
 	"PSLLL",
 	"PSLLO",
 	"PSLLQ",

src/cmd/internal/obj/x86/asm6.go

@@ -1255,6 +1255,9 @@ var optab =
 	{AOUTSL, ynone, Px, [23]uint8{0x6f}},
 	{AOUTSW, ynone, Pe, [23]uint8{0x6f}},
 	{AOUTW, yin, Pe, [23]uint8{0xe7, 0xef}},
+	{APABSB, yxm_q4, Pq4, [23]uint8{0x1c}},
+	{APABSD, yxm_q4, Pq4, [23]uint8{0x1e}},
+	{APABSW, yxm_q4, Pq4, [23]uint8{0x1d}},
 	{APACKSSLW, ymm, Py1, [23]uint8{0x6b, Pe, 0x6b}},
 	{APACKSSWB, ymm, Py1, [23]uint8{0x63, Pe, 0x63}},
 	{APACKUSWB, ymm, Py1, [23]uint8{0x67, Pe, 0x67}},
@@ -1292,6 +1295,7 @@ var optab =
 	{APINSRB, yinsr, Pq, [23]uint8{0x3a, 0x20, 00}},
 	{APINSRD, yinsr, Pq, [23]uint8{0x3a, 0x22, 00}},
 	{APINSRQ, yinsr, Pq3, [23]uint8{0x3a, 0x22, 00}},
+	{APMADDUBSW, yxm_q4, Pq4, [23]uint8{0x04}},
 	{APMADDWL, ymm, Py1, [23]uint8{0xf5, Pe, 0xf5}},
 	{APMAXSW, yxm, Pe, [23]uint8{0xee}},
 	{APMAXUB, yxm, Pe, [23]uint8{0xde}},
@@ -1311,6 +1315,7 @@ var optab =
 	{APMOVZXWD, yxm_q4, Pq4, [23]uint8{0x33}},
 	{APMOVZXWQ, yxm_q4, Pq4, [23]uint8{0x34}},
 	{APMULDQ, yxm_q4, Pq4, [23]uint8{0x28}},
+	{APMULHRSW, yxm_q4, Pq4, [23]uint8{0x0b}},
 	{APMULHUW, ymm, Py1, [23]uint8{0xe4, Pe, 0xe4}},
 	{APMULHW, ymm, Py1, [23]uint8{0xe5, Pe, 0xe5}},
 	{APMULLD, yxm_q4, Pq4, [23]uint8{0x40}},
@@ -1334,6 +1339,9 @@ var optab =
 	{APSHUFLW, yxshuf, Pf2, [23]uint8{0x70, 00}},
 	{APSHUFW, ymshuf, Pm, [23]uint8{0x70, 00}},
 	{APSHUFB, ymshufb, Pq, [23]uint8{0x38, 0x00}},
+	{APSIGNB, yxm_q4, Pq4, [23]uint8{0x08}},
+	{APSIGND, yxm_q4, Pq4, [23]uint8{0x0a}},
+	{APSIGNW, yxm_q4, Pq4, [23]uint8{0x09}},
 	{APSLLO, ypsdq, Pq, [23]uint8{0x73, 07}},
 	{APSLLL, yps, Py3, [23]uint8{0xf2, 0x72, 06, Pe, 0xf2, Pe, 0x72, 06}},
 	{APSLLQ, yps, Py3, [23]uint8{0xf3, 0x73, 06, Pe, 0xf3, Pe, 0x73, 06}},