From 82539ad8d59729fb45b0bb0edda8f2bddb719eb1 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 15:15:26 +0200 Subject: Adding upstream version 1.17.13. Signed-off-by: Daniel Baumann --- src/hash/crc32/crc32_arm64.go | 50 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 src/hash/crc32/crc32_arm64.go (limited to 'src/hash/crc32/crc32_arm64.go') diff --git a/src/hash/crc32/crc32_arm64.go b/src/hash/crc32/crc32_arm64.go new file mode 100644 index 0000000..0242d1d --- /dev/null +++ b/src/hash/crc32/crc32_arm64.go @@ -0,0 +1,50 @@ +// 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 Catagnoli 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) +} -- cgit v1.2.3