diff --git a/src/cmd/asm/internal/asm/testdata/amd64enc.s b/src/cmd/asm/internal/asm/testdata/amd64enc.s
index 5d2880a6ba7..534854f845f 100644
--- a/src/cmd/asm/internal/asm/testdata/amd64enc.s
+++ b/src/cmd/asm/internal/asm/testdata/amd64enc.s
@@ -3083,14 +3083,14 @@ TEXT asmtest(SB),DUPOK|NOSPLIT,$0
 	//TODO: PABSB (R11), M3                 // 410f381c1b
 	//TODO: PABSB M2, M3                    // 0f381cda
 	//TODO: PABSB M3, M3                    // 0f381cdb
-	//TODO: PABSB (BX), X2                  // 660f381c13
-	//TODO: PABSB (R11), X2                 // 66410f381c13
-	//TODO: PABSB X2, X2                    // 660f381cd2
-	//TODO: PABSB X11, X2                   // 66410f381cd3
-	//TODO: PABSB (BX), X11                 // 66440f381c1b
-	//TODO: PABSB (R11), X11                // 66450f381c1b
-	//TODO: PABSB X2, X11                   // 66440f381cda
-	//TODO: PABSB X11, X11                  // 66450f381cdb
+	PABSB (BX), X2                          // 660f381c13
+	PABSB (R11), X2                         // 66410f381c13
+	PABSB X2, X2                            // 660f381cd2
+	PABSB X11, X2                           // 66410f381cd3
+	PABSB (BX), X11                         // 66440f381c1b
+	PABSB (R11), X11                        // 66450f381c1b
+	PABSB X2, X11                           // 66440f381cda
+	PABSB X11, X11                          // 66450f381cdb
 	//TODO: PABSD (BX), M2                  // 0f381e13
 	//TODO: PABSD (R11), M2                 // 410f381e13
 	//TODO: PABSD M2, M2                    // 0f381ed2
@@ -3099,14 +3099,14 @@ TEXT asmtest(SB),DUPOK|NOSPLIT,$0
 	//TODO: PABSD (R11), M3                 // 410f381e1b
 	//TODO: PABSD M2, M3                    // 0f381eda
 	//TODO: PABSD M3, M3                    // 0f381edb
-	//TODO: PABSD (BX), X2                  // 660f381e13
-	//TODO: PABSD (R11), X2                 // 66410f381e13
-	//TODO: PABSD X2, X2                    // 660f381ed2
-	//TODO: PABSD X11, X2                   // 66410f381ed3
-	//TODO: PABSD (BX), X11                 // 66440f381e1b
-	//TODO: PABSD (R11), X11                // 66450f381e1b
-	//TODO: PABSD X2, X11                   // 66440f381eda
-	//TODO: PABSD X11, X11                  // 66450f381edb
+	PABSD (BX), X2                          // 660f381e13
+	PABSD (R11), X2                         // 66410f381e13
+	PABSD X2, X2                            // 660f381ed2
+	PABSD X11, X2                           // 66410f381ed3
+	PABSD (BX), X11                         // 66440f381e1b
+	PABSD (R11), X11                        // 66450f381e1b
+	PABSD X2, X11                           // 66440f381eda
+	PABSD X11, X11                          // 66450f381edb
 	//TODO: PABSW (BX), M2                  // 0f381d13
 	//TODO: PABSW (R11), M2                 // 410f381d13
 	//TODO: PABSW M2, M2                    // 0f381dd2
@@ -3115,14 +3115,14 @@ TEXT asmtest(SB),DUPOK|NOSPLIT,$0
 	//TODO: PABSW (R11), M3                 // 410f381d1b
 	//TODO: PABSW M2, M3                    // 0f381dda
 	//TODO: PABSW M3, M3                    // 0f381ddb
-	//TODO: PABSW (BX), X2                  // 660f381d13
-	//TODO: PABSW (R11), X2                 // 66410f381d13
-	//TODO: PABSW X2, X2                    // 660f381dd2
-	//TODO: PABSW X11, X2                   // 66410f381dd3
-	//TODO: PABSW (BX), X11                 // 66440f381d1b
-	//TODO: PABSW (R11), X11                // 66450f381d1b
-	//TODO: PABSW X2, X11                   // 66440f381dda
-	//TODO: PABSW X11, X11                  // 66450f381ddb
+	PABSW (BX), X2                          // 660f381d13
+	PABSW (R11), X2                         // 66410f381d13
+	PABSW X2, X2                            // 660f381dd2
+	PABSW X11, X2                           // 66410f381dd3
+	PABSW (BX), X11                         // 66440f381d1b
+	PABSW (R11), X11                        // 66450f381d1b
+	PABSW X2, X11                           // 66440f381dda
+	PABSW X11, X11                          // 66450f381ddb
 	PACKSSLW (BX), M2                       // 0f6b13
 	PACKSSLW (R11), M2                      // 410f6b13
 	PACKSSLW M2, M2                         // 0f6bd2
@@ -3775,14 +3775,14 @@ TEXT asmtest(SB),DUPOK|NOSPLIT,$0
 	//TODO: PMADDUBSW (R11), M3             // 410f38041b
 	//TODO: PMADDUBSW M2, M3                // 0f3804da
 	//TODO: PMADDUBSW M3, M3                // 0f3804db
-	//TODO: PMADDUBSW (BX), X2              // 660f380413
-	//TODO: PMADDUBSW (R11), X2             // 66410f380413
-	//TODO: PMADDUBSW X2, X2                // 660f3804d2
-	//TODO: PMADDUBSW X11, X2               // 66410f3804d3
-	//TODO: PMADDUBSW (BX), X11             // 66440f38041b
-	//TODO: PMADDUBSW (R11), X11            // 66450f38041b
-	//TODO: PMADDUBSW X2, X11               // 66440f3804da
-	//TODO: PMADDUBSW X11, X11              // 66450f3804db
+	PMADDUBSW (BX), X2                      // 660f380413
+	PMADDUBSW (R11), X2                     // 66410f380413
+	PMADDUBSW X2, X2                        // 660f3804d2
+	PMADDUBSW X11, X2                       // 66410f3804d3
+	PMADDUBSW (BX), X11                     // 66440f38041b
+	PMADDUBSW (R11), X11                    // 66450f38041b
+	PMADDUBSW X2, X11                       // 66440f3804da
+	PMADDUBSW X11, X11                      // 66450f3804db
 	PMADDWL (BX), M2                        // 0ff513
 	PMADDWL (R11), M2                       // 410ff513
 	PMADDWL M2, M2                          // 0ff5d2
@@ -4047,14 +4047,14 @@ TEXT asmtest(SB),DUPOK|NOSPLIT,$0
 	//TODO: PMULHRSW (R11), M3              // 410f380b1b
 	//TODO: PMULHRSW M2, M3                 // 0f380bda
 	//TODO: PMULHRSW M3, M3                 // 0f380bdb
-	//TODO: PMULHRSW (BX), X2               // 660f380b13
-	//TODO: PMULHRSW (R11), X2              // 66410f380b13
-	//TODO: PMULHRSW X2, X2                 // 660f380bd2
-	//TODO: PMULHRSW X11, X2                // 66410f380bd3
-	//TODO: PMULHRSW (BX), X11              // 66440f380b1b
-	//TODO: PMULHRSW (R11), X11             // 66450f380b1b
-	//TODO: PMULHRSW X2, X11                // 66440f380bda
-	//TODO: PMULHRSW X11, X11               // 66450f380bdb
+	PMULHRSW (BX), X2                       // 660f380b13
+	PMULHRSW (R11), X2                      // 66410f380b13
+	PMULHRSW X2, X2                         // 660f380bd2
+	PMULHRSW X11, X2                        // 66410f380bd3
+	PMULHRSW (BX), X11                      // 66440f380b1b
+	PMULHRSW (R11), X11                     // 66450f380b1b
+	PMULHRSW X2, X11                        // 66440f380bda
+	PMULHRSW X11, X11                       // 66450f380bdb
 	PMULHUW (BX), M2                        // 0fe413
 	PMULHUW (R11), M2                       // 410fe413
 	PMULHUW M2, M2                          // 0fe4d2
@@ -4283,14 +4283,14 @@ TEXT asmtest(SB),DUPOK|NOSPLIT,$0
 	//TODO: PSIGNB (R11), M3                // 410f38081b
 	//TODO: PSIGNB M2, M3                   // 0f3808da
 	//TODO: PSIGNB M3, M3                   // 0f3808db
-	//TODO: PSIGNB (BX), X2                 // 660f380813
-	//TODO: PSIGNB (R11), X2                // 66410f380813
-	//TODO: PSIGNB X2, X2                   // 660f3808d2
-	//TODO: PSIGNB X11, X2                  // 66410f3808d3
-	//TODO: PSIGNB (BX), X11                // 66440f38081b
-	//TODO: PSIGNB (R11), X11               // 66450f38081b
-	//TODO: PSIGNB X2, X11                  // 66440f3808da
-	//TODO: PSIGNB X11, X11                 // 66450f3808db
+	PSIGNB (BX), X2                         // 660f380813
+	PSIGNB (R11), X2                        // 66410f380813
+	PSIGNB X2, X2                           // 660f3808d2
+	PSIGNB X11, X2                          // 66410f3808d3
+	PSIGNB (BX), X11                        // 66440f38081b
+	PSIGNB (R11), X11                       // 66450f38081b
+	PSIGNB X2, X11                          // 66440f3808da
+	PSIGNB X11, X11                         // 66450f3808db
 	//TODO: PSIGND (BX), M2                 // 0f380a13
 	//TODO: PSIGND (R11), M2                // 410f380a13
 	//TODO: PSIGND M2, M2                   // 0f380ad2
@@ -4299,14 +4299,14 @@ TEXT asmtest(SB),DUPOK|NOSPLIT,$0
 	//TODO: PSIGND (R11), M3                // 410f380a1b
 	//TODO: PSIGND M2, M3                   // 0f380ada
 	//TODO: PSIGND M3, M3                   // 0f380adb
-	//TODO: PSIGND (BX), X2                 // 660f380a13
-	//TODO: PSIGND (R11), X2                // 66410f380a13
-	//TODO: PSIGND X2, X2                   // 660f380ad2
-	//TODO: PSIGND X11, X2                  // 66410f380ad3
-	//TODO: PSIGND (BX), X11                // 66440f380a1b
-	//TODO: PSIGND (R11), X11               // 66450f380a1b
-	//TODO: PSIGND X2, X11                  // 66440f380ada
-	//TODO: PSIGND X11, X11                 // 66450f380adb
+	PSIGND (BX), X2                         // 660f380a13
+	PSIGND (R11), X2                        // 66410f380a13
+	PSIGND X2, X2                           // 660f380ad2
+	PSIGND X11, X2                          // 66410f380ad3
+	PSIGND (BX), X11                        // 66440f380a1b
+	PSIGND (R11), X11                       // 66450f380a1b
+	PSIGND X2, X11                          // 66440f380ada
+	PSIGND X11, X11                         // 66450f380adb
 	//TODO: PSIGNW (BX), M2                 // 0f380913
 	//TODO: PSIGNW (R11), M2                // 410f380913
 	//TODO: PSIGNW M2, M2                   // 0f3809d2
@@ -4315,14 +4315,14 @@ TEXT asmtest(SB),DUPOK|NOSPLIT,$0
 	//TODO: PSIGNW (R11), M3                // 410f38091b
 	//TODO: PSIGNW M2, M3                   // 0f3809da
 	//TODO: PSIGNW M3, M3                   // 0f3809db
-	//TODO: PSIGNW (BX), X2                 // 660f380913
-	//TODO: PSIGNW (R11), X2                // 66410f380913
-	//TODO: PSIGNW X2, X2                   // 660f3809d2
-	//TODO: PSIGNW X11, X2                  // 66410f3809d3
-	//TODO: PSIGNW (BX), X11                // 66440f38091b
-	//TODO: PSIGNW (R11), X11               // 66450f38091b
-	//TODO: PSIGNW X2, X11                  // 66440f3809da
-	//TODO: PSIGNW X11, X11                 // 66450f3809db
+	PSIGNW (BX), X2                         // 660f380913
+	PSIGNW (R11), X2                        // 66410f380913
+	PSIGNW X2, X2                           // 660f3809d2
+	PSIGNW X11, X2                          // 66410f3809d3
+	PSIGNW (BX), X11                        // 66440f38091b
+	PSIGNW (R11), X11                       // 66450f38091b
+	PSIGNW X2, X11                          // 66440f3809da
+	PSIGNW X11, X11                         // 66450f3809db
 	PSLLL (BX), M2                          // 0ff213
 	PSLLL (R11), M2                         // 410ff213
 	PSLLL M2, M2                            // 0ff2d2
diff --git a/src/cmd/internal/obj/x86/a.out.go b/src/cmd/internal/obj/x86/a.out.go
index 92d358ba4e7..36e715933f3 100644
--- a/src/cmd/internal/obj/x86/a.out.go
+++ b/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
diff --git a/src/cmd/internal/obj/x86/anames.go b/src/cmd/internal/obj/x86/anames.go
index 38cc03d84d1..8499e93b842 100644
--- a/src/cmd/internal/obj/x86/anames.go
+++ b/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",
diff --git a/src/cmd/internal/obj/x86/asm6.go b/src/cmd/internal/obj/x86/asm6.go
index 7b4ed78ac88..48b96cd7c9d 100644
--- a/src/cmd/internal/obj/x86/asm6.go
+++ b/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}},