| /* adler32_ssse3_p.h -- adler32 ssse3 utility functions |
| * Copyright (C) 2022 Adam Stylinski |
| * For conditions of distribution and use, see copyright notice in zlib.h |
| */ |
| |
| #ifndef ADLER32_SSSE3_P_H_ |
| #define ADLER32_SSSE3_P_H_ |
| |
| #ifdef X86_SSSE3_ADLER32 |
| |
| #include <immintrin.h> |
| #include <stdint.h> |
| |
| static inline uint32_t partial_hsum(__m128i x) { |
| __m128i second_int = _mm_srli_si128(x, 8); |
| __m128i sum = _mm_add_epi32(x, second_int); |
| return _mm_cvtsi128_si32(sum); |
| } |
| |
| static inline uint32_t hsum(__m128i x) { |
| __m128i sum1 = _mm_unpackhi_epi64(x, x); |
| __m128i sum2 = _mm_add_epi32(x, sum1); |
| __m128i sum3 = _mm_shuffle_epi32(sum2, 0x01); |
| __m128i sum4 = _mm_add_epi32(sum2, sum3); |
| return _mm_cvtsi128_si32(sum4); |
| } |
| #endif |
| |
| #endif |
