| // 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 |
| |
| func supportsCRC32() bool |
| func castagnoliUpdate(crc uint32, p []byte) uint32 |
| func ieeeUpdate(crc uint32, p []byte) uint32 |
| |
| var hasCRC32 = supportsCRC32() |
| |
| func archAvailableCastagnoli() bool { |
| return hasCRC32 |
| } |
| |
| func archInitCastagnoli() { |
| if !hasCRC32 { |
| panic("arch-specific crc32 instruction for Catagnoli not available") |
| } |
| } |
| |
| func archUpdateCastagnoli(crc uint32, p []byte) uint32 { |
| if !hasCRC32 { |
| panic("arch-specific crc32 instruction for Castagnoli not available") |
| } |
| |
| return ^castagnoliUpdate(^crc, p) |
| } |
| |
| func archAvailableIEEE() bool { |
| return hasCRC32 |
| } |
| |
| func archInitIEEE() { |
| if !hasCRC32 { |
| panic("arch-specific crc32 instruction for IEEE not available") |
| } |
| } |
| |
| func archUpdateIEEE(crc uint32, p []byte) uint32 { |
| if !hasCRC32 { |
| panic("arch-specific crc32 instruction for IEEE not available") |
| } |
| |
| return ^ieeeUpdate(^crc, p) |
| } |