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68 lines
2.1 KiB
68 lines
2.1 KiB
/* |
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* |
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* memcpy16.cpp |
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* |
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* Simple SSE-optimized memcpy routine. Requires that the input |
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* pointers and byte count be 16-byte aligned. |
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* |
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* Copyright (c) 2011-2012, Archaea Software, LLC. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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#ifndef _WIN32 |
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#include <stdint.h> |
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#endif |
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#include <xmmintrin.h> |
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bool |
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memcpy16( void *_dst, const void *_src, size_t N ) |
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{ |
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float *dst = (float *) _dst; |
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const float *src = (const float *) _src; |
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// return failure if size, source or destination |
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// is not 16 byte aligned |
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if ( N & 0xf ) { |
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return false; |
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} |
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if ( (uintptr_t) dst & 0xf ) { |
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return false; |
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} |
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if ( (uintptr_t) src & 0xf ) { |
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return false; |
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} |
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while ( N ) { |
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_mm_store_ps( dst, _mm_load_ps( src ) ); |
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src += 4; |
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dst += 4; |
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N -= 16; |
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} |
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return true; |
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} |
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