// 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 CacheLinePadSize = 64
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// arm64 doesn't have a 'cpuid' equivalent, so we rely on HWCAP/HWCAP2.
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// These are initialized by archauxv in runtime/os_linux_arm64.go.
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// These should not be changed after they are initialized.
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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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{Name: "evtstrm", Feature: &ARM64.HasEVTSTRM},
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{Name: "aes", Feature: &ARM64.HasAES},
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{Name: "pmull", Feature: &ARM64.HasPMULL},
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{Name: "sha1", Feature: &ARM64.HasSHA1},
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{Name: "sha2", Feature: &ARM64.HasSHA2},
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{Name: "crc32", Feature: &ARM64.HasCRC32},
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{Name: "atomics", Feature: &ARM64.HasATOMICS},
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{Name: "fphp", Feature: &ARM64.HasFPHP},
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{Name: "asimdhp", Feature: &ARM64.HasASIMDHP},
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{Name: "cpuid", Feature: &ARM64.HasCPUID},
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{Name: "asimdrdm", Feature: &ARM64.HasASIMDRDM},
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{Name: "jscvt", Feature: &ARM64.HasJSCVT},
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{Name: "fcma", Feature: &ARM64.HasFCMA},
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{Name: "lrcpc", Feature: &ARM64.HasLRCPC},
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{Name: "dcpop", Feature: &ARM64.HasDCPOP},
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{Name: "sha3", Feature: &ARM64.HasSHA3},
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{Name: "sm3", Feature: &ARM64.HasSM3},
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{Name: "sm4", Feature: &ARM64.HasSM4},
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{Name: "asimddp", Feature: &ARM64.HasASIMDDP},
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{Name: "sha512", Feature: &ARM64.HasSHA512},
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{Name: "sve", Feature: &ARM64.HasSVE},
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{Name: "asimdfhm", Feature: &ARM64.HasASIMDFHM},
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// These capabilities should always be enabled on arm64:
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{Name: "fp", Feature: &ARM64.HasFP, Required: true},
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{Name: "asimd", Feature: &ARM64.HasASIMD, Required: true},
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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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