Ian Lance Taylor | aa8901e | 2019-09-06 18:12:46 +0000 | [diff] [blame] | 1 | // Copyright 2018 The Go Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | package cpu |
| 6 | |
Ian Lance Taylor | aa8901e | 2019-09-06 18:12:46 +0000 | [diff] [blame] | 7 | // HWCAP/HWCAP2 bits. These are exposed by Linux. |
| 8 | const ( |
| 9 | hwcap_FP = 1 << 0 |
| 10 | hwcap_ASIMD = 1 << 1 |
| 11 | hwcap_EVTSTRM = 1 << 2 |
| 12 | hwcap_AES = 1 << 3 |
| 13 | hwcap_PMULL = 1 << 4 |
| 14 | hwcap_SHA1 = 1 << 5 |
| 15 | hwcap_SHA2 = 1 << 6 |
| 16 | hwcap_CRC32 = 1 << 7 |
| 17 | hwcap_ATOMICS = 1 << 8 |
| 18 | hwcap_FPHP = 1 << 9 |
| 19 | hwcap_ASIMDHP = 1 << 10 |
| 20 | hwcap_CPUID = 1 << 11 |
| 21 | hwcap_ASIMDRDM = 1 << 12 |
| 22 | hwcap_JSCVT = 1 << 13 |
| 23 | hwcap_FCMA = 1 << 14 |
| 24 | hwcap_LRCPC = 1 << 15 |
| 25 | hwcap_DCPOP = 1 << 16 |
| 26 | hwcap_SHA3 = 1 << 17 |
| 27 | hwcap_SM3 = 1 << 18 |
| 28 | hwcap_SM4 = 1 << 19 |
| 29 | hwcap_ASIMDDP = 1 << 20 |
| 30 | hwcap_SHA512 = 1 << 21 |
| 31 | hwcap_SVE = 1 << 22 |
| 32 | hwcap_ASIMDFHM = 1 << 23 |
| 33 | ) |
| 34 | |
| 35 | func doinit() { |
Ian Lance Taylor | f75af8c | 2020-07-27 22:27:54 -0700 | [diff] [blame] | 36 | if err := readHWCAP(); err != nil { |
| 37 | // failed to read /proc/self/auxv, try reading registers directly |
| 38 | readARM64Registers() |
| 39 | return |
| 40 | } |
| 41 | |
Ian Lance Taylor | aa8901e | 2019-09-06 18:12:46 +0000 | [diff] [blame] | 42 | // HWCAP feature bits |
| 43 | ARM64.HasFP = isSet(hwCap, hwcap_FP) |
| 44 | ARM64.HasASIMD = isSet(hwCap, hwcap_ASIMD) |
| 45 | ARM64.HasEVTSTRM = isSet(hwCap, hwcap_EVTSTRM) |
| 46 | ARM64.HasAES = isSet(hwCap, hwcap_AES) |
| 47 | ARM64.HasPMULL = isSet(hwCap, hwcap_PMULL) |
| 48 | ARM64.HasSHA1 = isSet(hwCap, hwcap_SHA1) |
| 49 | ARM64.HasSHA2 = isSet(hwCap, hwcap_SHA2) |
| 50 | ARM64.HasCRC32 = isSet(hwCap, hwcap_CRC32) |
| 51 | ARM64.HasATOMICS = isSet(hwCap, hwcap_ATOMICS) |
| 52 | ARM64.HasFPHP = isSet(hwCap, hwcap_FPHP) |
| 53 | ARM64.HasASIMDHP = isSet(hwCap, hwcap_ASIMDHP) |
| 54 | ARM64.HasCPUID = isSet(hwCap, hwcap_CPUID) |
| 55 | ARM64.HasASIMDRDM = isSet(hwCap, hwcap_ASIMDRDM) |
| 56 | ARM64.HasJSCVT = isSet(hwCap, hwcap_JSCVT) |
| 57 | ARM64.HasFCMA = isSet(hwCap, hwcap_FCMA) |
| 58 | ARM64.HasLRCPC = isSet(hwCap, hwcap_LRCPC) |
| 59 | ARM64.HasDCPOP = isSet(hwCap, hwcap_DCPOP) |
| 60 | ARM64.HasSHA3 = isSet(hwCap, hwcap_SHA3) |
| 61 | ARM64.HasSM3 = isSet(hwCap, hwcap_SM3) |
| 62 | ARM64.HasSM4 = isSet(hwCap, hwcap_SM4) |
| 63 | ARM64.HasASIMDDP = isSet(hwCap, hwcap_ASIMDDP) |
| 64 | ARM64.HasSHA512 = isSet(hwCap, hwcap_SHA512) |
| 65 | ARM64.HasSVE = isSet(hwCap, hwcap_SVE) |
| 66 | ARM64.HasASIMDFHM = isSet(hwCap, hwcap_ASIMDFHM) |
| 67 | } |
| 68 | |
| 69 | func isSet(hwc uint, value uint) bool { |
| 70 | return hwc&value != 0 |
| 71 | } |