40 lines
850 B
Go
40 lines
850 B
Go
//go:build amd64 && !generic
|
|
// +build amd64,!generic
|
|
|
|
package tz
|
|
|
|
import (
|
|
"git.frostfs.info/TrueCloudLab/tzhash/gf127"
|
|
"golang.org/x/sys/cpu"
|
|
)
|
|
|
|
func write(d *digest, data []byte) (n int, err error) {
|
|
switch {
|
|
case cpu.X86.HasAVX && cpu.X86.HasAVX2:
|
|
return writeAVX2(d, data)
|
|
case cpu.X86.HasAVX:
|
|
return writeAVX(d, data)
|
|
default:
|
|
return writeGeneric(d, data)
|
|
}
|
|
}
|
|
|
|
func writeAVX2(d *digest, data []byte) (n int, err error) {
|
|
n = len(data)
|
|
if len(data) != 0 {
|
|
mulByteSliceRightx2(&d.x[0], &d.x[2], n, &data[0])
|
|
}
|
|
return
|
|
}
|
|
|
|
func writeAVX(d *digest, data []byte) (n int, err error) {
|
|
n = len(data)
|
|
for _, b := range data {
|
|
mulByteRight(&d.x[0], &d.x[1], &d.x[2], &d.x[3], b)
|
|
}
|
|
return
|
|
}
|
|
|
|
func mulByteRight(c00, c01, c10, c11 *GF127, b byte)
|
|
func mulByteSliceRightx2(c00c10 *gf127.GF127, c01c11 *gf127.GF127, n int, data *byte)
|