cpu: add linux/arm64
Port from Go internal/cpu
Updates golang/go#25185
Change-Id: I8390980e38b61f6c428fafa0665a03952e7b00bb
Reviewed-on: https://go-review.googlesource.com/c/150718
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Martin Möhrmann <moehrmann@google.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
diff --git a/cpu/cpu_arm64.go b/cpu/cpu_arm64.go
index 1d2ab29..02ed58b 100644
--- a/cpu/cpu_arm64.go
+++ b/cpu/cpu_arm64.go
@@ -5,3 +5,63 @@
package cpu
const cacheLineSize = 64
+
+// 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_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 doinit() {
+ // HWCAP feature bits
+ ARM64.HasFP = isSet(HWCap, hwcap_FP)
+ ARM64.HasASIMD = isSet(HWCap, hwcap_ASIMD)
+ ARM64.HasEVTSTRM = isSet(HWCap, hwcap_EVTSTRM)
+ ARM64.HasAES = isSet(HWCap, hwcap_AES)
+ ARM64.HasPMULL = isSet(HWCap, hwcap_PMULL)
+ ARM64.HasSHA1 = isSet(HWCap, hwcap_SHA1)
+ ARM64.HasSHA2 = isSet(HWCap, hwcap_SHA2)
+ ARM64.HasCRC32 = isSet(HWCap, hwcap_CRC32)
+ ARM64.HasATOMICS = isSet(HWCap, hwcap_ATOMICS)
+ ARM64.HasFPHP = isSet(HWCap, hwcap_FPHP)
+ ARM64.HasASIMDHP = isSet(HWCap, hwcap_ASIMDHP)
+ ARM64.HasCPUID = isSet(HWCap, hwcap_CPUID)
+ ARM64.HasASIMDRDM = isSet(HWCap, hwcap_ASIMDRDM)
+ ARM64.HasJSCVT = isSet(HWCap, hwcap_JSCVT)
+ ARM64.HasFCMA = isSet(HWCap, hwcap_FCMA)
+ ARM64.HasLRCPC = isSet(HWCap, hwcap_LRCPC)
+ ARM64.HasDCPOP = isSet(HWCap, hwcap_DCPOP)
+ ARM64.HasSHA3 = isSet(HWCap, hwcap_SHA3)
+ ARM64.HasSM3 = isSet(HWCap, hwcap_SM3)
+ ARM64.HasSM4 = isSet(HWCap, hwcap_SM4)
+ ARM64.HasASIMDDP = isSet(HWCap, hwcap_ASIMDDP)
+ ARM64.HasSHA512 = isSet(HWCap, hwcap_SHA512)
+ ARM64.HasSVE = isSet(HWCap, hwcap_SVE)
+ ARM64.HasASIMDFHM = isSet(HWCap, hwcap_ASIMDFHM)
+}
+
+func isSet(hwc uint, value uint) bool {
+ return hwc&value != 0
+}
