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0de26fd78e
Zlib-ng is zlib replacement with optimizations for "next generation" systems. Its optimization may benifits image library decode and encode speed such as libpng. In our tests, if using zlib-ng and libpng combination on a x86_64 machine with AVX2, the time of `imdecode` amd `imencode` will drop 20% approximately. This patch enables zlib-ng's optimization if `CV_DISABLE_OPTIMIZATION` is OFF. Since Zlib-ng can dispatch intrinsics on the fly, port work is much easier. Related discussion: https://github.com/opencv/opencv/issues/22573
116 lines
3.5 KiB
C
116 lines
3.5 KiB
C
/* adler32_avx512.c -- compute the Adler-32 checksum of a data stream
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* Copyright (C) 1995-2011 Mark Adler
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* Authors:
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* Adam Stylinski <kungfujesus06@gmail.com>
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* Brian Bockelman <bockelman@gmail.com>
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* For conditions of distribution and use, see copyright notice in zlib.h
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*/
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#ifdef X86_AVX512
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#include "../../zbuild.h"
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#include "../../adler32_p.h"
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#include "../../adler32_fold.h"
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#include "../../cpu_features.h"
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#include <immintrin.h>
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#include "x86_intrins.h"
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#include "adler32_avx512_p.h"
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static inline uint32_t adler32_fold_copy_impl(uint32_t adler, uint8_t *dst, const uint8_t *src, size_t len, const int COPY) {
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if (src == NULL) return 1L;
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if (len == 0) return adler;
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uint32_t adler0, adler1;
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adler1 = (adler >> 16) & 0xffff;
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adler0 = adler & 0xffff;
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rem_peel:
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if (len < 64) {
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/* This handles the remaining copies, just call normal adler checksum after this */
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if (COPY) {
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__mmask64 storemask = (0xFFFFFFFFFFFFFFFFUL >> (64 - len));
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__m512i copy_vec = _mm512_maskz_loadu_epi8(storemask, src);
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_mm512_mask_storeu_epi8(dst, storemask, copy_vec);
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}
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#ifdef X86_AVX2
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return adler32_avx2(adler, src, len);
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#elif defined(X86_SSSE3)
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return adler32_ssse3(adler, src, len);
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#else
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return adler32_len_16(adler0, src, len, adler1);
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#endif
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}
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__m512i vbuf, vs1_0, vs3;
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const __m512i dot2v = _mm512_set_epi8(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
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20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37,
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38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55,
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56, 57, 58, 59, 60, 61, 62, 63, 64);
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const __m512i dot3v = _mm512_set1_epi16(1);
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const __m512i zero = _mm512_setzero_si512();
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size_t k;
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while (len >= 64) {
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__m512i vs1 = _mm512_zextsi128_si512(_mm_cvtsi32_si128(adler0));
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__m512i vs2 = _mm512_zextsi128_si512(_mm_cvtsi32_si128(adler1));
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vs1_0 = vs1;
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vs3 = _mm512_setzero_si512();
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k = MIN(len, NMAX);
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k -= k % 64;
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len -= k;
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while (k >= 64) {
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/*
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vs1 = adler + sum(c[i])
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vs2 = sum2 + 64 vs1 + sum( (64-i+1) c[i] )
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*/
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vbuf = _mm512_loadu_si512(src);
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if (COPY) {
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_mm512_storeu_si512(dst, vbuf);
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dst += 64;
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}
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src += 64;
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k -= 64;
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__m512i vs1_sad = _mm512_sad_epu8(vbuf, zero);
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__m512i v_short_sum2 = _mm512_maddubs_epi16(vbuf, dot2v);
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vs1 = _mm512_add_epi32(vs1_sad, vs1);
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vs3 = _mm512_add_epi32(vs3, vs1_0);
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__m512i vsum2 = _mm512_madd_epi16(v_short_sum2, dot3v);
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vs2 = _mm512_add_epi32(vsum2, vs2);
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vs1_0 = vs1;
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}
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vs3 = _mm512_slli_epi32(vs3, 6);
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vs2 = _mm512_add_epi32(vs2, vs3);
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adler0 = partial_hsum(vs1) % BASE;
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adler1 = _mm512_reduce_add_epu32(vs2) % BASE;
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}
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adler = adler0 | (adler1 << 16);
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/* Process tail (len < 64). */
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if (len) {
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goto rem_peel;
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}
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return adler;
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}
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Z_INTERNAL uint32_t adler32_fold_copy_avx512(uint32_t adler, uint8_t *dst, const uint8_t *src, size_t len) {
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return adler32_fold_copy_impl(adler, dst, src, len, 1);
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}
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Z_INTERNAL uint32_t adler32_avx512(uint32_t adler, const uint8_t *src, size_t len) {
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return adler32_fold_copy_impl(adler, NULL, src, len, 0);
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}
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#endif
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