cmd/asm: Add SHA512 hardware instructions for ARM64

ARMv8.2-SHA add SHA512 intructions:

1. SHA512H	Vm.D2, Vn, Vd
2. SHA512H2	Vm.D2, Vn, Vd
3. SHA512SU0	Vn.D2, Vd.D2
4. SHA512SU1	Vm.D2, Vn.D2, Vd.D2

ARMv8 Architecture Reference Manual C7.2.234-C7.2.234

Change-Id: Ie970fef1bba5312ad466f246035da4c40a1bbb39
Reviewed-on: https://go-review.googlesource.com/c/go/+/180057
Reviewed-by: Cherry Zhang <[email protected]>
Run-TryBot: Cherry Zhang <[email protected]>
TryBot-Result: Gobot Gobot <[email protected]>

Author: mengzhuo

src/cmd/asm/internal/asm/testdata/arm64.s

@@ -77,6 +77,10 @@ TEXT	foo(SB), DUPOK|NOSPLIT, $-8
 	SHA1H	V5, V4                          // a408285e
 	SHA1M	V8.S4, V7, V6                   // e620085e
 	SHA1P	V11.S4, V10, V9                 // 49110b5e
+	SHA512H	V2.D2, V1, V0                   // 208062ce
+	SHA512H2	V4.D2, V3, V2           // 628464ce
+	SHA512SU0	V9.D2, V8.D2            // 2881c0ce
+	SHA512SU1	V7.D2, V6.D2, V5.D2     // c58867ce
 	VADDV	V0.S4, V0                       // 00b8b14e
 	VMOVI	$82, V0.B16                     // 40e6024f
 	VUADDLV	V6.B16, V6                      // c638306e

src/cmd/internal/obj/arm64/a.out.go

@@ -946,6 +946,10 @@ const (
 	ASHA256H2
 	ASHA256SU0
 	ASHA256SU1
+	ASHA512H
+	ASHA512H2
+	ASHA512SU0
+	ASHA512SU1
 	AVADD
 	AVADDP
 	AVAND

src/cmd/internal/obj/arm64/anames.go

@@ -2747,16 +2747,20 @@ func buildop(ctxt *obj.Link) {
 			oprangeset(AAESIMC, t)
 			oprangeset(ASHA1SU1, t)
 			oprangeset(ASHA256SU0, t)
+			oprangeset(ASHA512SU0, t)
 
 		case ASHA1C:
 			oprangeset(ASHA1P, t)
 			oprangeset(ASHA1M, t)
 
 		case ASHA256H:
 			oprangeset(ASHA256H2, t)
+			oprangeset(ASHA512H, t)
+			oprangeset(ASHA512H2, t)
 
 		case ASHA1SU0:
 			oprangeset(ASHA256SU1, t)
+			oprangeset(ASHA512SU1, t)
 
 		case AVADDV:
 			oprangeset(AVUADDLV, t)
@@ -5391,6 +5395,18 @@ func (c *ctxt7) oprrr(p *obj.Prog, a obj.As) uint32 {
 	case ASHA256SU0:
 		return 0x5E<<24 | 2<<20 | 8<<16 | 2<<12 | 2<<10
 
+	case ASHA512H:
+		return 0xCE<<24 | 3<<21 | 8<<12
+
+	case ASHA512H2:
+		return 0xCE<<24 | 3<<21 | 8<<12 | 4<<8
+
+	case ASHA512SU1:
+		return 0xCE<<24 | 3<<21 | 8<<12 | 8<<8
+
+	case ASHA512SU0:
+		return 0xCE<<24 | 3<<22 | 8<<12
+
 	case AFCVTZSD:
 		return FPCVTI(1, 0, 1, 3, 0)