mirror of
https://github.com/go-gitea/gitea
synced 2024-11-01 07:44:25 +00:00
42 lines
1.0 KiB
Go
42 lines
1.0 KiB
Go
//+build !noasm
|
|
//+build !appengine
|
|
|
|
// Copyright 2015, Klaus Post, see LICENSE for details.
|
|
|
|
package flate
|
|
|
|
import (
|
|
"github.com/klauspost/cpuid"
|
|
)
|
|
|
|
// crc32sse returns a hash for the first 4 bytes of the slice
|
|
// len(a) must be >= 4.
|
|
//go:noescape
|
|
func crc32sse(a []byte) uint32
|
|
|
|
// crc32sseAll calculates hashes for each 4-byte set in a.
|
|
// dst must be east len(a) - 4 in size.
|
|
// The size is not checked by the assembly.
|
|
//go:noescape
|
|
func crc32sseAll(a []byte, dst []uint32)
|
|
|
|
// 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.
|
|
//
|
|
// TODO: drop the "SSE4" name, since it doesn't use any SSE instructions.
|
|
//
|
|
//go:noescape
|
|
func matchLenSSE4(a, b []byte, max int) int
|
|
|
|
// histogram accumulates a histogram of b in h.
|
|
// h must be at least 256 entries in length,
|
|
// and must be cleared before calling this function.
|
|
//go:noescape
|
|
func histogram(b []byte, h []int32)
|
|
|
|
// Detect SSE 4.2 feature.
|
|
func init() {
|
|
useSSE42 = cpuid.CPU.SSE42()
|
|
}
|