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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
25 lines
733 B
C
25 lines
733 B
C
/* insert_string_roll.c -- insert_string rolling hash variant
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*
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* Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler
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* For conditions of distribution and use, see copyright notice in zlib.h
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*
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*/
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#include "zbuild.h"
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#include "deflate.h"
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#define HASH_SLIDE 5
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#define HASH_CALC(s, h, val) h = ((h << HASH_SLIDE) ^ ((uint8_t)val))
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#define HASH_CALC_VAR s->ins_h
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#define HASH_CALC_VAR_INIT
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#define HASH_CALC_READ val = strstart[0]
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#define HASH_CALC_MASK (32768u - 1u)
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#define HASH_CALC_OFFSET (STD_MIN_MATCH-1)
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#define UPDATE_HASH update_hash_roll
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#define INSERT_STRING insert_string_roll
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#define QUICK_INSERT_STRING quick_insert_string_roll
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#include "insert_string_tpl.h"
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