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// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package cpu
const CacheLinePadSize = 64
// arm64 doesn't have a 'cpuid' equivalent, so we rely on HWCAP/HWCAP2.
// These are initialized by archauxv and should not be changed after they are
// initialized.
var HWCap uint
var HWCap2 uint
// 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() {
options = []option{
{Name: "evtstrm", Feature: &ARM64.HasEVTSTRM},
{Name: "aes", Feature: &ARM64.HasAES},
{Name: "pmull", Feature: &ARM64.HasPMULL},
{Name: "sha1", Feature: &ARM64.HasSHA1},
{Name: "sha2", Feature: &ARM64.HasSHA2},
{Name: "crc32", Feature: &ARM64.HasCRC32},
{Name: "atomics", Feature: &ARM64.HasATOMICS},
{Name: "fphp", Feature: &ARM64.HasFPHP},
{Name: "asimdhp", Feature: &ARM64.HasASIMDHP},
{Name: "cpuid", Feature: &ARM64.HasCPUID},
{Name: "asimdrdm", Feature: &ARM64.HasASIMDRDM},
{Name: "jscvt", Feature: &ARM64.HasJSCVT},
{Name: "fcma", Feature: &ARM64.HasFCMA},
{Name: "lrcpc", Feature: &ARM64.HasLRCPC},
{Name: "dcpop", Feature: &ARM64.HasDCPOP},
{Name: "sha3", Feature: &ARM64.HasSHA3},
{Name: "sm3", Feature: &ARM64.HasSM3},
{Name: "sm4", Feature: &ARM64.HasSM4},
{Name: "asimddp", Feature: &ARM64.HasASIMDDP},
{Name: "sha512", Feature: &ARM64.HasSHA512},
{Name: "sve", Feature: &ARM64.HasSVE},
{Name: "asimdfhm", Feature: &ARM64.HasASIMDFHM},
// These capabilities should always be enabled on arm64:
{Name: "fp", Feature: &ARM64.HasFP, Required: true},
{Name: "asimd", Feature: &ARM64.HasASIMD, Required: true},
}
// 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
}
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