internal/cpu: update arm64 cpu features

Follow the Linux Kernel 4.15
Add Arm64 minimalFeatures test

Change-Id: I1c092521ba59b1e4096c27786fa0464f9ef7d311
Reviewed-on: https://go-review.googlesource.com/103636
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/internal/cpu/cpu.go

@@ -63,17 +63,32 @@ var ARM64 arm64
 // The booleans in arm64 contain the correspondingly named cpu feature bit.
 // The struct is padded to avoid false sharing.
 type arm64 struct {
-	_          [CacheLineSize]byte
-	HasFP      bool
-	HasASIMD   bool
-	HasEVTSTRM bool
-	HasAES     bool
-	HasPMULL   bool
-	HasSHA1    bool
-	HasSHA2    bool
-	HasCRC32   bool
-	HasATOMICS bool
-	_          [CacheLineSize]byte
+	_           [CacheLineSize]byte
+	HasFP       bool
+	HasASIMD    bool
+	HasEVTSTRM  bool
+	HasAES      bool
+	HasPMULL    bool
+	HasSHA1     bool
+	HasSHA2     bool
+	HasCRC32    bool
+	HasATOMICS  bool
+	HasFPHP     bool
+	HasASIMDHP  bool
+	HasCPUID    bool
+	HasASIMDRDM bool
+	HasJSCVT    bool
+	HasFCMA     bool
+	HasLRCPC    bool
+	HasDCPOP    bool
+	HasSHA3     bool
+	HasSM3      bool
+	HasSM4      bool
+	HasASIMDDP  bool
+	HasSHA512   bool
+	HasSVE      bool
+	HasASIMDFHM bool
+	_           [CacheLineSize]byte
 }
 
 var S390X s390x

src/internal/cpu/cpu_arm64.go

@@ -16,15 +16,30 @@ var arm64_hwcap2 uint
 
 // HWCAP/HWCAP2 bits. These are exposed by Linux.
 const (
-	hwcap_FP      = (1 << 0)
-	hwcap_ASIMD   = (1 << 1)
-	hwcap_EVTSTRM = (1 << 2)
-	hwcap_AES     = (1 << 3)
-	hwcap_PMULL   = (1 << 4)
-	hwcap_SHA1    = (1 << 5)
-	hwcap_SHA2    = (1 << 6)
-	hwcap_CRC32   = (1 << 7)
-	hwcap_ATOMICS = (1 << 8)
+	hwcap_FP       = (1 << 0)
+	hwcap_ASIMD    = (1 << 1)
+	hwcap_EVTSTRM  = (1 << 2)
+	hwcap_AES      = (1 << 3)
+	hwcap_PMULL    = (1 << 4)
+	hwcap_SHA1     = (1 << 5)
+	hwcap_SHA2     = (1 << 6)
+	hwcap_CRC32    = (1 << 7)
+	hwcap_ATOMICS  = (1 << 8)
+	hwcap_FPHP     = (1 << 9)
+	hwcap_ASIMDHP  = (1 << 10)
+	hwcap_CPUID    = (1 << 11)
+	hwcap_ASIMDRDM = (1 << 12)
+	hwcap_JSCVT    = (1 << 13)
+	hwcap_FCMA     = (1 << 14)
+	hwcap_LRCPC    = (1 << 15)
+	hwcap_DCPOP    = (1 << 16)
+	hwcap_SHA3     = (1 << 17)
+	hwcap_SM3      = (1 << 18)
+	hwcap_SM4      = (1 << 19)
+	hwcap_ASIMDDP  = (1 << 20)
+	hwcap_SHA512   = (1 << 21)
+	hwcap_SVE      = (1 << 22)
+	hwcap_ASIMDFHM = (1 << 23)
 )
 
 func init() {
@@ -38,6 +53,21 @@ func init() {
 	ARM64.HasSHA2 = isSet(arm64_hwcap, hwcap_SHA2)
 	ARM64.HasCRC32 = isSet(arm64_hwcap, hwcap_CRC32)
 	ARM64.HasATOMICS = isSet(arm64_hwcap, hwcap_ATOMICS)
+	ARM64.HasFPHP = isSet(arm64_hwcap, hwcap_FPHP)
+	ARM64.HasASIMDHP = isSet(arm64_hwcap, hwcap_ASIMDHP)
+	ARM64.HasCPUID = isSet(arm64_hwcap, hwcap_CPUID)
+	ARM64.HasASIMDRDM = isSet(arm64_hwcap, hwcap_ASIMDRDM)
+	ARM64.HasJSCVT = isSet(arm64_hwcap, hwcap_JSCVT)
+	ARM64.HasFCMA = isSet(arm64_hwcap, hwcap_FCMA)
+	ARM64.HasLRCPC = isSet(arm64_hwcap, hwcap_LRCPC)
+	ARM64.HasDCPOP = isSet(arm64_hwcap, hwcap_DCPOP)
+	ARM64.HasSHA3 = isSet(arm64_hwcap, hwcap_SHA3)
+	ARM64.HasSM3 = isSet(arm64_hwcap, hwcap_SM3)
+	ARM64.HasSM4 = isSet(arm64_hwcap, hwcap_SM4)
+	ARM64.HasASIMDDP = isSet(arm64_hwcap, hwcap_ASIMDDP)
+	ARM64.HasSHA512 = isSet(arm64_hwcap, hwcap_SHA512)
+	ARM64.HasSVE = isSet(arm64_hwcap, hwcap_SVE)
+	ARM64.HasASIMDFHM = isSet(arm64_hwcap, hwcap_ASIMDFHM)
 }
 
 func isSet(hwc uint, value uint) bool {

src/internal/cpu/cpu_test.go

@@ -48,3 +48,14 @@ func TestPPC64minimalFeatures(t *testing.T) {
 		}
 	}
 }
+
+func TestARM64minimalFeatures(t *testing.T) {
+	if runtime.GOARCH == "arm64" {
+		if !cpu.ARM64.HasASIMD {
+			t.Fatalf("HasASIMD expected true, got false")
+		}
+		if !cpu.ARM64.HasFP {
+			t.Fatalf("HasFP expected true, got false")
+		}
+	}
+}