Make Nix builds work

1 files changed, 121 insertions, 0 deletions

diff --git a/vendor/github.com/klauspost/cpuid/v2/os_darwin_arm64.go b/vendor/github.com/klauspost/cpuid/v2/os_darwin_arm64.go
new file mode 100644
index 0000000..84b1acd
--- /dev/null
+++ b/vendor/github.com/klauspost/cpuid/v2/os_darwin_arm64.go
@@ -0,0 +1,121 @@
+// Copyright (c) 2020 Klaus Post, released under MIT License. See LICENSE file.
+
+package cpuid
+
+import (
+        "runtime"
+        "strings"
+
+        "golang.org/x/sys/unix"
+)
+
+func detectOS(c *CPUInfo) bool {
+        if runtime.GOOS != "ios" {
+                tryToFillCPUInfoFomSysctl(c)
+        }
+        // There are no hw.optional sysctl values for the below features on Mac OS 11.0
+        // to detect their supported state dynamically. Assume the CPU features that
+        // Apple Silicon M1 supports to be available as a minimal set of features
+        // to all Go programs running on darwin/arm64.
+        // TODO: Add more if we know them.
+        c.featureSet.setIf(runtime.GOOS != "ios", AESARM, PMULL, SHA1, SHA2)
+
+        return true
+}
+
+func sysctlGetBool(name string) bool {
+        value, err := unix.SysctlUint32(name)
+        if err != nil {
+                return false
+        }
+        return value != 0
+}
+
+func sysctlGetString(name string) string {
+        value, err := unix.Sysctl(name)
+        if err != nil {
+                return ""
+        }
+        return value
+}
+
+func sysctlGetInt(unknown int, names ...string) int {
+        for _, name := range names {
+                value, err := unix.SysctlUint32(name)
+                if err != nil {
+                        continue
+                }
+                if value != 0 {
+                        return int(value)
+                }
+        }
+        return unknown
+}
+
+func sysctlGetInt64(unknown int, names ...string) int {
+        for _, name := range names {
+                value64, err := unix.SysctlUint64(name)
+                if err != nil {
+                        continue
+                }
+                if int(value64) != unknown {
+                        return int(value64)
+                }
+        }
+        return unknown
+}
+
+func setFeature(c *CPUInfo, name string, feature FeatureID) {
+        c.featureSet.setIf(sysctlGetBool(name), feature)
+}
+func tryToFillCPUInfoFomSysctl(c *CPUInfo) {
+        c.BrandName = sysctlGetString("machdep.cpu.brand_string")
+
+        if len(c.BrandName) != 0 {
+                c.VendorString = strings.Fields(c.BrandName)[0]
+        }
+
+        c.PhysicalCores = sysctlGetInt(runtime.NumCPU(), "hw.physicalcpu")
+        c.ThreadsPerCore = sysctlGetInt(1, "machdep.cpu.thread_count", "kern.num_threads") /
+                sysctlGetInt(1, "hw.physicalcpu")
+        c.LogicalCores = sysctlGetInt(runtime.NumCPU(), "machdep.cpu.core_count")
+        c.Family = sysctlGetInt(0, "machdep.cpu.family", "hw.cpufamily")
+        c.Model = sysctlGetInt(0, "machdep.cpu.model")
+        c.CacheLine = sysctlGetInt64(0, "hw.cachelinesize")
+        c.Cache.L1I = sysctlGetInt64(-1, "hw.l1icachesize")
+        c.Cache.L1D = sysctlGetInt64(-1, "hw.l1dcachesize")
+        c.Cache.L2 = sysctlGetInt64(-1, "hw.l2cachesize")
+        c.Cache.L3 = sysctlGetInt64(-1, "hw.l3cachesize")
+
+        // from https://developer.arm.com/downloads/-/exploration-tools/feature-names-for-a-profile
+        setFeature(c, "hw.optional.arm.FEAT_AES", AESARM)
+        setFeature(c, "hw.optional.AdvSIMD", ASIMD)
+        setFeature(c, "hw.optional.arm.FEAT_DotProd", ASIMDDP)
+        setFeature(c, "hw.optional.arm.FEAT_RDM", ASIMDRDM)
+        setFeature(c, "hw.optional.FEAT_CRC32", CRC32)
+        setFeature(c, "hw.optional.arm.FEAT_DPB", DCPOP)
+        // setFeature(c, "", EVTSTRM)
+        setFeature(c, "hw.optional.arm.FEAT_FCMA", FCMA)
+        setFeature(c, "hw.optional.arm.FEAT_FP", FP)
+        setFeature(c, "hw.optional.arm.FEAT_FP16", FPHP)
+        setFeature(c, "hw.optional.arm.FEAT_PAuth", GPA)
+        setFeature(c, "hw.optional.arm.FEAT_JSCVT", JSCVT)
+        setFeature(c, "hw.optional.arm.FEAT_LRCPC", LRCPC)
+        setFeature(c, "hw.optional.arm.FEAT_PMULL", PMULL)
+        setFeature(c, "hw.optional.arm.FEAT_SHA1", SHA1)
+        setFeature(c, "hw.optional.arm.FEAT_SHA256", SHA2)
+        setFeature(c, "hw.optional.arm.FEAT_SHA3", SHA3)
+        setFeature(c, "hw.optional.arm.FEAT_SHA512", SHA512)
+        // setFeature(c, "", SM3)
+        // setFeature(c, "", SM4)
+        setFeature(c, "hw.optional.arm.FEAT_SVE", SVE)
+
+        // from empirical observation
+        setFeature(c, "hw.optional.AdvSIMD_HPFPCvt", ASIMDHP)
+        setFeature(c, "hw.optional.armv8_1_atomics", ATOMICS)
+        setFeature(c, "hw.optional.floatingpoint", FP)
+        setFeature(c, "hw.optional.armv8_2_sha3", SHA3)
+        setFeature(c, "hw.optional.armv8_2_sha512", SHA512)
+        setFeature(c, "hw.optional.armv8_3_compnum", FCMA)
+        setFeature(c, "hw.optional.armv8_crc32", CRC32)
+}