golang crc32_arm64 代码
文件路径：/src/hash/crc32/crc32_arm64.go
/ Copyright 2017 The Go Authors. All rights reserved.
/ Use of this source code is governed by a BSD-style
/ license that can be found in the LICENSE file.
/ ARM64-specific hardware-assisted CRC32 algorithms. See crc32.go for a
/ description of the interface that each architecture-specific file
/ implements.
package crc32
import "internal/cpu"
func castagnoliUpdate(crc uint32, p []byte) uint32
func ieeeUpdate(crc uint32, p []byte) uint32
func archAvailableCastagnoli() bool {
return cpu.ARM64.HasCRC32
}
func archInitCastagnoli() {
if !cpu.ARM64.HasCRC32 {
panic("arch-specific crc32 instruction for Castagnoli not available")
}
}
func archUpdateCastagnoli(crc uint32, p []byte) uint32 {
if !cpu.ARM64.HasCRC32 {
panic("arch-specific crc32 instruction for Castagnoli not available")
}
return ^castagnoliUpdate(^crc, p)
}
func archAvailableIEEE() bool {
return cpu.ARM64.HasCRC32
}
func archInitIEEE() {
if !cpu.ARM64.HasCRC32 {
panic("arch-specific crc32 instruction for IEEE not available")
}
}
func archUpdateIEEE(crc uint32, p []byte) uint32 {
if !cpu.ARM64.HasCRC32 {
panic("arch-specific crc32 instruction for IEEE not available")
}
return ^ieeeUpdate(^crc, p)
}