103 lines
3.0 KiB
Go
103 lines
3.0 KiB
Go
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// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package cpu
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const CacheLineSize = 64
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// arm64 doesn't have a 'cpuid' equivalent, so we rely on HWCAP/HWCAP2.
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// These are linknamed in runtime/os_linux_arm64.go and are initialized by
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// archauxv().
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var hwcap uint
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var hwcap2 uint
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// HWCAP/HWCAP2 bits. These are exposed by Linux.
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const (
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hwcap_FP = (1 << 0)
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hwcap_ASIMD = (1 << 1)
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hwcap_EVTSTRM = (1 << 2)
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hwcap_AES = (1 << 3)
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hwcap_PMULL = (1 << 4)
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hwcap_SHA1 = (1 << 5)
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hwcap_SHA2 = (1 << 6)
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hwcap_CRC32 = (1 << 7)
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hwcap_ATOMICS = (1 << 8)
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hwcap_FPHP = (1 << 9)
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hwcap_ASIMDHP = (1 << 10)
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hwcap_CPUID = (1 << 11)
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hwcap_ASIMDRDM = (1 << 12)
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hwcap_JSCVT = (1 << 13)
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hwcap_FCMA = (1 << 14)
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hwcap_LRCPC = (1 << 15)
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hwcap_DCPOP = (1 << 16)
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hwcap_SHA3 = (1 << 17)
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hwcap_SM3 = (1 << 18)
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hwcap_SM4 = (1 << 19)
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hwcap_ASIMDDP = (1 << 20)
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hwcap_SHA512 = (1 << 21)
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hwcap_SVE = (1 << 22)
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hwcap_ASIMDFHM = (1 << 23)
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)
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func doinit() {
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options = []option{
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{"evtstrm", &ARM64.HasEVTSTRM},
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{"aes", &ARM64.HasAES},
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{"pmull", &ARM64.HasPMULL},
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{"sha1", &ARM64.HasSHA1},
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{"sha2", &ARM64.HasSHA2},
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{"crc32", &ARM64.HasCRC32},
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{"atomics", &ARM64.HasATOMICS},
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{"fphp", &ARM64.HasFPHP},
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{"asimdhp", &ARM64.HasASIMDHP},
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{"cpuid", &ARM64.HasCPUID},
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{"asimdrdm", &ARM64.HasASIMDRDM},
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{"jscvt", &ARM64.HasJSCVT},
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{"fcma", &ARM64.HasFCMA},
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{"lrcpc", &ARM64.HasLRCPC},
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{"dcpop", &ARM64.HasDCPOP},
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{"sha3", &ARM64.HasSHA3},
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{"sm3", &ARM64.HasSM3},
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{"sm4", &ARM64.HasSM4},
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{"asimddp", &ARM64.HasASIMDDP},
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{"sha512", &ARM64.HasSHA512},
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{"sve", &ARM64.HasSVE},
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{"asimdfhm", &ARM64.HasASIMDFHM},
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// These capabilities should always be enabled on arm64:
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// {"fp", &ARM64.HasFP},
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// {"asimd", &ARM64.HasASIMD},
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}
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// HWCAP feature bits
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ARM64.HasFP = isSet(hwcap, hwcap_FP)
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ARM64.HasASIMD = isSet(hwcap, hwcap_ASIMD)
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ARM64.HasEVTSTRM = isSet(hwcap, hwcap_EVTSTRM)
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ARM64.HasAES = isSet(hwcap, hwcap_AES)
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ARM64.HasPMULL = isSet(hwcap, hwcap_PMULL)
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ARM64.HasSHA1 = isSet(hwcap, hwcap_SHA1)
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ARM64.HasSHA2 = isSet(hwcap, hwcap_SHA2)
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ARM64.HasCRC32 = isSet(hwcap, hwcap_CRC32)
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ARM64.HasATOMICS = isSet(hwcap, hwcap_ATOMICS)
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ARM64.HasFPHP = isSet(hwcap, hwcap_FPHP)
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ARM64.HasASIMDHP = isSet(hwcap, hwcap_ASIMDHP)
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ARM64.HasCPUID = isSet(hwcap, hwcap_CPUID)
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ARM64.HasASIMDRDM = isSet(hwcap, hwcap_ASIMDRDM)
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ARM64.HasJSCVT = isSet(hwcap, hwcap_JSCVT)
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ARM64.HasFCMA = isSet(hwcap, hwcap_FCMA)
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ARM64.HasLRCPC = isSet(hwcap, hwcap_LRCPC)
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ARM64.HasDCPOP = isSet(hwcap, hwcap_DCPOP)
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ARM64.HasSHA3 = isSet(hwcap, hwcap_SHA3)
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ARM64.HasSM3 = isSet(hwcap, hwcap_SM3)
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ARM64.HasSM4 = isSet(hwcap, hwcap_SM4)
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ARM64.HasASIMDDP = isSet(hwcap, hwcap_ASIMDDP)
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ARM64.HasSHA512 = isSet(hwcap, hwcap_SHA512)
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ARM64.HasSVE = isSet(hwcap, hwcap_SVE)
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ARM64.HasASIMDFHM = isSet(hwcap, hwcap_ASIMDFHM)
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}
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func isSet(hwc uint, value uint) bool {
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return hwc&value != 0
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}
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