// Minio Cloud Storage, (C) 2016 Minio, Inc. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. // package sha256 // True when SIMD instructions are available. var avx512 bool var avx2 bool var avx bool var sse bool var sse2 bool var sse3 bool var ssse3 bool var sse41 bool var sse42 bool var popcnt bool var sha bool var armSha = haveArmSha() func init() { var _xsave bool var _osxsave bool var _avx bool var _avx2 bool var _avx512f bool var _avx512dq bool // var _avx512pf bool // var _avx512er bool // var _avx512cd bool var _avx512bw bool var _avx512vl bool var _sseState bool var _avxState bool var _opmaskState bool var _zmmHI256State bool var _hi16ZmmState bool mfi, _, _, _ := cpuid(0) if mfi >= 1 { _, _, c, d := cpuid(1) sse = (d & (1 << 25)) != 0 sse2 = (d & (1 << 26)) != 0 sse3 = (c & (1 << 0)) != 0 ssse3 = (c & (1 << 9)) != 0 sse41 = (c & (1 << 19)) != 0 sse42 = (c & (1 << 20)) != 0 popcnt = (c & (1 << 23)) != 0 _xsave = (c & (1 << 26)) != 0 _osxsave = (c & (1 << 27)) != 0 _avx = (c & (1 << 28)) != 0 } if mfi >= 7 { _, b, _, _ := cpuid(7) _avx2 = (b & (1 << 5)) != 0 _avx512f = (b & (1 << 16)) != 0 _avx512dq = (b & (1 << 17)) != 0 // _avx512pf = (b & (1 << 26)) != 0 // _avx512er = (b & (1 << 27)) != 0 // _avx512cd = (b & (1 << 28)) != 0 _avx512bw = (b & (1 << 30)) != 0 _avx512vl = (b & (1 << 31)) != 0 sha = (b & (1 << 29)) != 0 } // Stop here if XSAVE unsupported or not enabled if !_xsave || !_osxsave { return } if _xsave && _osxsave { a, _ := xgetbv(0) _sseState = (a & (1 << 1)) != 0 _avxState = (a & (1 << 2)) != 0 _opmaskState = (a & (1 << 5)) != 0 _zmmHI256State = (a & (1 << 6)) != 0 _hi16ZmmState = (a & (1 << 7)) != 0 } else { _sseState = true } // Very unlikely that OS would enable XSAVE and then disable SSE if !_sseState { sse = false sse2 = false sse3 = false ssse3 = false sse41 = false sse42 = false } if _avxState { avx = _avx avx2 = _avx2 } if _opmaskState && _zmmHI256State && _hi16ZmmState { avx512 = (_avx512f && _avx512dq && _avx512bw && _avx512vl) } }