mirror of https://gitee.com/bigwinds/arangodb
65 lines
1.9 KiB
ArmAsm
65 lines
1.9 KiB
ArmAsm
/////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2016-2016 ArangoDB GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Richard Parker
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////////////////////////////////////////////////////////////////////////////////
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/* TRI_BlockCrc32_SSE42 assembler */
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/* assumes presence of SSE4.2 */
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/* %rax uint32_t */
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/* TRI_BlockCrc32_SSE42 */
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/* %rdi uint32_t */
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/* %rsi char const* data */
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/* %rdx size_t length */
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.text
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.globl TRI_BlockCrc32_SSE42
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.globl _TRI_BlockCrc32_SSE42
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#ifndef __APPLE__
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.type TRI_BlockCrc32_SSE42, @function
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.type _TRI_BlockCrc32_SSE42, @function
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#endif
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TRI_BlockCrc32_SSE42:
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_TRI_BlockCrc32_SSE42:
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movl %edi,%eax
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crca1:
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cmpq $8,%rdx
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jb crca4
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movq (%rsi),%rcx
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crc32 %rcx,%rax
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subq $8,%rdx
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addq $8,%rsi
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jmp crca1
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crca4:
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cmpq $0,%rdx
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je crca9
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movb (%rsi),%cl
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crc32 %cl,%eax
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subq $1,%rdx
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addq $1,%rsi
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jmp crca4
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crca9:
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ret
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#ifndef __APPLE__
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.size TRI_BlockCrc32_SSE42, .-TRI_BlockCrc32_SSE42
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.size _TRI_BlockCrc32_SSE42, .-_TRI_BlockCrc32_SSE42
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#endif
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/* end of TRI_BlockCrc32_SSE42 */
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