gtsocial-umbx

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os_darwin_arm64.go (3805B)

      1 // Copyright (c) 2020 Klaus Post, released under MIT License. See LICENSE file.
      2 
      3 package cpuid
      4 
      5 import (
      6 	"runtime"
      7 	"strings"
      8 
      9 	"golang.org/x/sys/unix"
     10 )
     11 
     12 func detectOS(c *CPUInfo) bool {
     13 	if runtime.GOOS != "ios" {
     14 		tryToFillCPUInfoFomSysctl(c)
     15 	}
     16 	// There are no hw.optional sysctl values for the below features on Mac OS 11.0
     17 	// to detect their supported state dynamically. Assume the CPU features that
     18 	// Apple Silicon M1 supports to be available as a minimal set of features
     19 	// to all Go programs running on darwin/arm64.
     20 	// TODO: Add more if we know them.
     21 	c.featureSet.setIf(runtime.GOOS != "ios", AESARM, PMULL, SHA1, SHA2)
     22 
     23 	return true
     24 }
     25 
     26 func sysctlGetBool(name string) bool {
     27 	value, err := unix.SysctlUint32(name)
     28 	if err != nil {
     29 		return false
     30 	}
     31 	return value != 0
     32 }
     33 
     34 func sysctlGetString(name string) string {
     35 	value, err := unix.Sysctl(name)
     36 	if err != nil {
     37 		return ""
     38 	}
     39 	return value
     40 }
     41 
     42 func sysctlGetInt(unknown int, names ...string) int {
     43 	for _, name := range names {
     44 		value, err := unix.SysctlUint32(name)
     45 		if err != nil {
     46 			continue
     47 		}
     48 		if value != 0 {
     49 			return int(value)
     50 		}
     51 	}
     52 	return unknown
     53 }
     54 
     55 func sysctlGetInt64(unknown int, names ...string) int {
     56 	for _, name := range names {
     57 		value64, err := unix.SysctlUint64(name)
     58 		if err != nil {
     59 			continue
     60 		}
     61 		if int(value64) != unknown {
     62 			return int(value64)
     63 		}
     64 	}
     65 	return unknown
     66 }
     67 
     68 func setFeature(c *CPUInfo, name string, feature FeatureID) {
     69 	c.featureSet.setIf(sysctlGetBool(name), feature)
     70 }
     71 func tryToFillCPUInfoFomSysctl(c *CPUInfo) {
     72 	c.BrandName = sysctlGetString("machdep.cpu.brand_string")
     73 
     74 	if len(c.BrandName) != 0 {
     75 		c.VendorString = strings.Fields(c.BrandName)[0]
     76 	}
     77 
     78 	c.PhysicalCores = sysctlGetInt(runtime.NumCPU(), "hw.physicalcpu")
     79 	c.ThreadsPerCore = sysctlGetInt(1, "machdep.cpu.thread_count", "kern.num_threads") /
     80 		sysctlGetInt(1, "hw.physicalcpu")
     81 	c.LogicalCores = sysctlGetInt(runtime.NumCPU(), "machdep.cpu.core_count")
     82 	c.Family = sysctlGetInt(0, "machdep.cpu.family", "hw.cpufamily")
     83 	c.Model = sysctlGetInt(0, "machdep.cpu.model")
     84 	c.CacheLine = sysctlGetInt64(0, "hw.cachelinesize")
     85 	c.Cache.L1I = sysctlGetInt64(-1, "hw.l1icachesize")
     86 	c.Cache.L1D = sysctlGetInt64(-1, "hw.l1dcachesize")
     87 	c.Cache.L2 = sysctlGetInt64(-1, "hw.l2cachesize")
     88 	c.Cache.L3 = sysctlGetInt64(-1, "hw.l3cachesize")
     89 
     90 	// from https://developer.arm.com/downloads/-/exploration-tools/feature-names-for-a-profile
     91 	setFeature(c, "hw.optional.arm.FEAT_AES", AESARM)
     92 	setFeature(c, "hw.optional.AdvSIMD", ASIMD)
     93 	setFeature(c, "hw.optional.arm.FEAT_DotProd", ASIMDDP)
     94 	setFeature(c, "hw.optional.arm.FEAT_RDM", ASIMDRDM)
     95 	setFeature(c, "hw.optional.FEAT_CRC32", CRC32)
     96 	setFeature(c, "hw.optional.arm.FEAT_DPB", DCPOP)
     97 	// setFeature(c, "", EVTSTRM)
     98 	setFeature(c, "hw.optional.arm.FEAT_FCMA", FCMA)
     99 	setFeature(c, "hw.optional.arm.FEAT_FP", FP)
    100 	setFeature(c, "hw.optional.arm.FEAT_FP16", FPHP)
    101 	setFeature(c, "hw.optional.arm.FEAT_PAuth", GPA)
    102 	setFeature(c, "hw.optional.arm.FEAT_JSCVT", JSCVT)
    103 	setFeature(c, "hw.optional.arm.FEAT_LRCPC", LRCPC)
    104 	setFeature(c, "hw.optional.arm.FEAT_PMULL", PMULL)
    105 	setFeature(c, "hw.optional.arm.FEAT_SHA1", SHA1)
    106 	setFeature(c, "hw.optional.arm.FEAT_SHA256", SHA2)
    107 	setFeature(c, "hw.optional.arm.FEAT_SHA3", SHA3)
    108 	setFeature(c, "hw.optional.arm.FEAT_SHA512", SHA512)
    109 	// setFeature(c, "", SM3)
    110 	// setFeature(c, "", SM4)
    111 	setFeature(c, "hw.optional.arm.FEAT_SVE", SVE)
    112 
    113 	// from empirical observation
    114 	setFeature(c, "hw.optional.AdvSIMD_HPFPCvt", ASIMDHP)
    115 	setFeature(c, "hw.optional.armv8_1_atomics", ATOMICS)
    116 	setFeature(c, "hw.optional.floatingpoint", FP)
    117 	setFeature(c, "hw.optional.armv8_2_sha3", SHA3)
    118 	setFeature(c, "hw.optional.armv8_2_sha512", SHA512)
    119 	setFeature(c, "hw.optional.armv8_3_compnum", FCMA)
    120 	setFeature(c, "hw.optional.armv8_crc32", CRC32)
    121 }