mirror of
https://github.com/cuberite/libdeflate.git
synced 2025-08-04 10:16:44 -04:00
ff8634427b
Remove the ability of matchfinder_init() and matchfinder_rebase() to fail due to the matchfinder memory size being misaligned. Instead, require that the size always be 128-byte aligned -- which is already the case. Also, make the matchfinder memory always be 32-byte aligned -- which doesn't really have any downside.
118 lines
3.5 KiB
C
118 lines
3.5 KiB
C
/*
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* x86/matchfinder_impl.h - x86 implementations of matchfinder functions
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*
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* Copyright 2016 Eric Biggers
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifdef __AVX2__
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# include <immintrin.h>
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static forceinline void
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matchfinder_init_avx2(mf_pos_t *data, size_t size)
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{
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__m256i *p = (__m256i *)data;
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__m256i v = _mm256_set1_epi16(MATCHFINDER_INITVAL);
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STATIC_ASSERT(MATCHFINDER_MEM_ALIGNMENT % sizeof(*p) == 0);
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STATIC_ASSERT(MATCHFINDER_SIZE_ALIGNMENT % (4 * sizeof(*p)) == 0);
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STATIC_ASSERT(sizeof(mf_pos_t) == 2);
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do {
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p[0] = v;
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p[1] = v;
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p[2] = v;
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p[3] = v;
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p += 4;
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size -= 4 * sizeof(*p);
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} while (size != 0);
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}
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#define matchfinder_init matchfinder_init_avx2
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static forceinline void
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matchfinder_rebase_avx2(mf_pos_t *data, size_t size)
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{
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__m256i *p = (__m256i *)data;
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__m256i v = _mm256_set1_epi16((u16)-MATCHFINDER_WINDOW_SIZE);
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STATIC_ASSERT(MATCHFINDER_MEM_ALIGNMENT % sizeof(*p) == 0);
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STATIC_ASSERT(MATCHFINDER_SIZE_ALIGNMENT % (4 * sizeof(*p)) == 0);
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STATIC_ASSERT(sizeof(mf_pos_t) == 2);
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do {
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/* PADDSW: Add Packed Signed Integers With Signed Saturation */
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p[0] = _mm256_adds_epi16(p[0], v);
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p[1] = _mm256_adds_epi16(p[1], v);
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p[2] = _mm256_adds_epi16(p[2], v);
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p[3] = _mm256_adds_epi16(p[3], v);
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p += 4;
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size -= 4 * sizeof(*p);
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} while (size != 0);
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}
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#define matchfinder_rebase matchfinder_rebase_avx2
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#elif defined(__SSE2__)
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# include <emmintrin.h>
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static forceinline void
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matchfinder_init_sse2(mf_pos_t *data, size_t size)
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{
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__m128i *p = (__m128i *)data;
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__m128i v = _mm_set1_epi16(MATCHFINDER_INITVAL);
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STATIC_ASSERT(MATCHFINDER_MEM_ALIGNMENT % sizeof(*p) == 0);
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STATIC_ASSERT(MATCHFINDER_SIZE_ALIGNMENT % (4 * sizeof(*p)) == 0);
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STATIC_ASSERT(sizeof(mf_pos_t) == 2);
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do {
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p[0] = v;
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p[1] = v;
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p[2] = v;
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p[3] = v;
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p += 4;
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size -= 4 * sizeof(*p);
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} while (size != 0);
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}
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#define matchfinder_init matchfinder_init_sse2
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static forceinline void
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matchfinder_rebase_sse2(mf_pos_t *data, size_t size)
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{
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__m128i *p = (__m128i *)data;
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__m128i v = _mm_set1_epi16((u16)-MATCHFINDER_WINDOW_SIZE);
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STATIC_ASSERT(MATCHFINDER_MEM_ALIGNMENT % sizeof(*p) == 0);
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STATIC_ASSERT(MATCHFINDER_SIZE_ALIGNMENT % (4 * sizeof(*p)) == 0);
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STATIC_ASSERT(sizeof(mf_pos_t) == 2);
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do {
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/* PADDSW: Add Packed Signed Integers With Signed Saturation */
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p[0] = _mm_adds_epi16(p[0], v);
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p[1] = _mm_adds_epi16(p[1], v);
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p[2] = _mm_adds_epi16(p[2], v);
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p[3] = _mm_adds_epi16(p[3], v);
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p += 4;
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size -= 4 * sizeof(*p);
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} while (size != 0);
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}
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#define matchfinder_rebase matchfinder_rebase_sse2
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#endif /* __SSE2__ */
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