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29 lines
749 B
29 lines
749 B
/* adler32_ssse3_p.h -- adler32 ssse3 utility functions |
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* Copyright (C) 2022 Adam Stylinski |
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* For conditions of distribution and use, see copyright notice in zlib.h |
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*/ |
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#ifndef ADLER32_SSSE3_P_H_ |
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#define ADLER32_SSSE3_P_H_ |
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#ifdef X86_SSSE3 |
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#include <immintrin.h> |
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#include <stdint.h> |
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static inline uint32_t partial_hsum(__m128i x) { |
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__m128i second_int = _mm_srli_si128(x, 8); |
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__m128i sum = _mm_add_epi32(x, second_int); |
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return _mm_cvtsi128_si32(sum); |
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} |
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static inline uint32_t hsum(__m128i x) { |
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__m128i sum1 = _mm_unpackhi_epi64(x, x); |
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__m128i sum2 = _mm_add_epi32(x, sum1); |
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__m128i sum3 = _mm_shuffle_epi32(sum2, 0x01); |
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__m128i sum4 = _mm_add_epi32(sum2, sum3); |
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return _mm_cvtsi128_si32(sum4); |
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} |
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#endif |
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#endif
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