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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:23:18 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:23:18 +0000 |
| commit | 43a123c1ae6613b3efeed291fa552ecd909d3acf (patch) | |
| tree | fd92518b7024bc74031f78a1cf9e454b65e73665 /src/hash/crc32/crc32_arm64.s | |
| parent | Initial commit. (diff) | |
| download | golang-1.20-43a123c1ae6613b3efeed291fa552ecd909d3acf.tar.xz golang-1.20-43a123c1ae6613b3efeed291fa552ecd909d3acf.zip | |
Adding upstream version 1.20.14.upstream/1.20.14upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/hash/crc32/crc32_arm64.s')
| -rw-r--r-- | src/hash/crc32/crc32_arm64.s | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/src/hash/crc32/crc32_arm64.s b/src/hash/crc32/crc32_arm64.s new file mode 100644 index 0000000..85a113f --- /dev/null +++ b/src/hash/crc32/crc32_arm64.s @@ -0,0 +1,97 @@ +// 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. + +#include "textflag.h" + +// castagnoliUpdate updates the non-inverted crc with the given data. + +// func castagnoliUpdate(crc uint32, p []byte) uint32 +TEXT ·castagnoliUpdate(SB),NOSPLIT,$0-36 + MOVWU crc+0(FP), R9 // CRC value + MOVD p+8(FP), R13 // data pointer + MOVD p_len+16(FP), R11 // len(p) + +update: + CMP $16, R11 + BLT less_than_16 + LDP.P 16(R13), (R8, R10) + CRC32CX R8, R9 + CRC32CX R10, R9 + SUB $16, R11 + + JMP update + +less_than_16: + TBZ $3, R11, less_than_8 + + MOVD.P 8(R13), R10 + CRC32CX R10, R9 + +less_than_8: + TBZ $2, R11, less_than_4 + + MOVWU.P 4(R13), R10 + CRC32CW R10, R9 + +less_than_4: + TBZ $1, R11, less_than_2 + + MOVHU.P 2(R13), R10 + CRC32CH R10, R9 + +less_than_2: + TBZ $0, R11, done + + MOVBU (R13), R10 + CRC32CB R10, R9 + +done: + MOVWU R9, ret+32(FP) + RET + +// ieeeUpdate updates the non-inverted crc with the given data. + +// func ieeeUpdate(crc uint32, p []byte) uint32 +TEXT ·ieeeUpdate(SB),NOSPLIT,$0-36 + MOVWU crc+0(FP), R9 // CRC value + MOVD p+8(FP), R13 // data pointer + MOVD p_len+16(FP), R11 // len(p) + +update: + CMP $16, R11 + BLT less_than_16 + LDP.P 16(R13), (R8, R10) + CRC32X R8, R9 + CRC32X R10, R9 + SUB $16, R11 + + JMP update + +less_than_16: + TBZ $3, R11, less_than_8 + + MOVD.P 8(R13), R10 + CRC32X R10, R9 + +less_than_8: + TBZ $2, R11, less_than_4 + + MOVWU.P 4(R13), R10 + CRC32W R10, R9 + +less_than_4: + TBZ $1, R11, less_than_2 + + MOVHU.P 2(R13), R10 + CRC32H R10, R9 + +less_than_2: + TBZ $0, R11, done + + MOVBU (R13), R10 + CRC32B R10, R9 + +done: + MOVWU R9, ret+32(FP) + RET |