mirror of
https://github.com/opencloud-eu/opencloud.git
synced 2026-05-04 18:14:53 -05:00
Ralf Haferkamp
98 lines
1.7 KiB
ArmAsm
98 lines
1.7 KiB
ArmAsm
// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include "textflag.h"
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// castagnoliUpdate updates the non-inverted crc with the given data.
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// func castagnoliUpdate(crc uint32, p []byte) uint32
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TEXT ·castagnoliUpdate(SB), NOSPLIT, $0-36
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MOVWU crc+0(FP), R9 // CRC value
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MOVD p+8(FP), R13 // data pointer
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MOVD p_len+16(FP), R11 // len(p)
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update:
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CMP $16, R11
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BLT less_than_16
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LDP.P 16(R13), (R8, R10)
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CRC32CX R8, R9
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CRC32CX R10, R9
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SUB $16, R11
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JMP update
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less_than_16:
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TBZ $3, R11, less_than_8
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MOVD.P 8(R13), R10
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CRC32CX R10, R9
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less_than_8:
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TBZ $2, R11, less_than_4
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MOVWU.P 4(R13), R10
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CRC32CW R10, R9
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less_than_4:
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TBZ $1, R11, less_than_2
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MOVHU.P 2(R13), R10
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CRC32CH R10, R9
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less_than_2:
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TBZ $0, R11, done
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MOVBU (R13), R10
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CRC32CB R10, R9
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done:
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MOVWU R9, ret+32(FP)
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RET
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// ieeeUpdate updates the non-inverted crc with the given data.
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// func ieeeUpdate(crc uint32, p []byte) uint32
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TEXT ·ieeeUpdate(SB), NOSPLIT, $0-36
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MOVWU crc+0(FP), R9 // CRC value
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MOVD p+8(FP), R13 // data pointer
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MOVD p_len+16(FP), R11 // len(p)
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update:
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CMP $16, R11
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BLT less_than_16
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LDP.P 16(R13), (R8, R10)
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CRC32X R8, R9
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CRC32X R10, R9
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SUB $16, R11
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JMP update
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less_than_16:
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TBZ $3, R11, less_than_8
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MOVD.P 8(R13), R10
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CRC32X R10, R9
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less_than_8:
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TBZ $2, R11, less_than_4
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MOVWU.P 4(R13), R10
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CRC32W R10, R9
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less_than_4:
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TBZ $1, R11, less_than_2
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MOVHU.P 2(R13), R10
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CRC32H R10, R9
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less_than_2:
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TBZ $0, R11, done
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MOVBU (R13), R10
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CRC32B R10, R9
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done:
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MOVWU R9, ret+32(FP)
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RET
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