mirror of
https://github.com/fumiama/blake2b-simd.git
synced 2026-06-05 02:00:26 +08:00
cf4f8e0c34
``` $ go test -run=NONE -bench . PASS BenchmarkHash64-4 1000000 1036 ns/op 61.77 MB/s BenchmarkHash128-4 2000000 801 ns/op 159.67 MB/s BenchmarkHash1K-4 500000 2464 ns/op 415.53 MB/s BenchmarkHash8K-4 200000 11212 ns/op 730.60 MB/s BenchmarkHash32K-4 30000 40766 ns/op 803.80 MB/s BenchmarkHash128K-4 10000 163170 ns/op 803.28 MB/s ok github.com/minio/blake2b-simd 10.298s ```
52 lines
1.4 KiB
Go
52 lines
1.4 KiB
Go
// +build 386,!gccgo amd64,!gccgo
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// Copyright 2016 Frank Wessels <fwessels@xs4all.nl>
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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package blake2b
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func cpuid(op uint32) (eax, ebx, ecx, edx uint32)
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func cpuidex(op, op2 uint32) (eax, ebx, ecx, edx uint32)
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func xgetbv(index uint32) (eax, edx uint32)
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// True when SIMD instructions are available.
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var avx2 = haveAVX2()
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var avx = haveAVX()
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// haveAVX returns true if when there is AVX support
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func haveAVX() bool {
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_, _, c, _ := cpuid(1)
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// Check XGETBV, OXSAVE and AVX bits
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if c&(1<<26) != 0 && c&(1<<27) != 0 && c&(1<<28) != 0 {
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// Check for OS support
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eax, _ := xgetbv(0)
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return (eax & 0x6) == 0x6
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}
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return false
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}
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// haveAVX2 returns true if when there is AVX2 support
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func haveAVX2() bool {
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mfi, _, _, _ := cpuid(0)
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// Check AVX2, AVX2 requires OS support, but BMI1/2 don't.
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if mfi >= 7 && haveAVX() {
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_, ebx, _, _ := cpuidex(7, 0)
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return (ebx & 0x00000020) != 0
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}
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return false
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}
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