diff options
Diffstat (limited to 'neozip/arch/x86/adler32_ssse3_p.h')
| -rw-r--r-- | neozip/arch/x86/adler32_ssse3_p.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/neozip/arch/x86/adler32_ssse3_p.h b/neozip/arch/x86/adler32_ssse3_p.h new file mode 100644 index 0000000000..d7ec3fe0d5 --- /dev/null +++ b/neozip/arch/x86/adler32_ssse3_p.h @@ -0,0 +1,29 @@ +/* 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 + +#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 |