/usr/share/gocode/src/github.com/klauspost/compress/snappy/asm_amd64.go is in golang-github-klauspost-compress-dev 1.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 | //+build !noasm
//+build !appengine
// Copyright 2015, Klaus Post, see LICENSE for details.
package snappy
import (
"github.com/klauspost/cpuid"
)
// matchLenSSE4 returns the number of matching bytes in a and b
// up to length 'max'. Both slices must be at least 'max'
// bytes in size.
// It uses the PCMPESTRI SSE 4.2 instruction.
//go:noescape
func matchLenSSE4(a, b []byte, max int) int
// Detect SSE 4.2 feature.
func init() {
useSSE42 = cpuid.CPU.SSE42()
}
// matchLenSSE4Ref is a reference matcher.
func matchLenSSE4Ref(a, b []byte, max int) int {
for i := 0; i < max; i++ {
if a[i] != b[i] {
return i
}
}
return max
}
|