mirror of
https://github.com/fumiama/blake2b-simd.git
synced 2026-06-05 02:00:26 +08:00
f41b7a312a
- Add UNDIAGONALIZE define - Add DIAGONALIZE define - Add G1 define - Add G2 define - Add LOAD_SHUFFLE define Additionally check for AVX support.
38 lines
1.1 KiB
Go
38 lines
1.1 KiB
Go
// +build 386,!gccgo amd64,!gccgo
|
|
|
|
// Copyright 2016 Frank Wessels <fwessels@xs4all.nl>
|
|
//
|
|
// 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 blake2b
|
|
|
|
func cpuid(op uint32) (eax, ebx, ecx, edx uint32)
|
|
func xgetbv(index uint32) (eax, edx uint32)
|
|
|
|
// True when SIMD instructions are available.
|
|
var avx = haveAVX()
|
|
|
|
// haveSSE returns true if we have streaming SIMD instructions.
|
|
func haveAVX() bool {
|
|
_, _, c, _ := cpuid(1)
|
|
|
|
// Check XGETBV, OXSAVE and AVX bits
|
|
if c&(1<<26) != 0 && c&(1<<27) != 0 && c&(1<<28) != 0 {
|
|
// Check for OS support
|
|
eax, _ := xgetbv(0)
|
|
return (eax & 0x6) == 0x6
|
|
}
|
|
return false
|
|
}
|