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56 lines
2.1 KiB
C
56 lines
2.1 KiB
C
/* functable.h -- Struct containing function pointers to optimized functions
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* Copyright (C) 2017 Hans Kristian Rosbach
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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 FUNCTABLE_H_
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#define FUNCTABLE_H_
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#include "deflate.h"
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#include "crc32.h"
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#ifdef DISABLE_RUNTIME_CPU_DETECTION
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# include "arch_functions.h"
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/* When compiling with native instructions it is not necessary to use functable.
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* Instead we use native_ macro indicating the best available variant of arch-specific
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* functions for the current platform.
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*/
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# define FUNCTABLE_INIT ((void)0)
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# define FUNCTABLE_CALL(name) native_ ## name
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# define FUNCTABLE_FPTR(name) &native_ ## name
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#else
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struct functable_s {
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void (* force_init) (void);
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uint32_t (* adler32) (uint32_t adler, const uint8_t *buf, size_t len);
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uint32_t (* adler32_fold_copy) (uint32_t adler, uint8_t *dst, const uint8_t *src, size_t len);
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uint8_t* (* chunkmemset_safe) (uint8_t *out, uint8_t *from, unsigned len, unsigned left);
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uint32_t (* chunksize) (void);
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uint32_t (* compare256) (const uint8_t *src0, const uint8_t *src1);
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uint32_t (* crc32) (uint32_t crc, const uint8_t *buf, size_t len);
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void (* crc32_fold) (struct crc32_fold_s *crc, const uint8_t *src, size_t len, uint32_t init_crc);
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void (* crc32_fold_copy) (struct crc32_fold_s *crc, uint8_t *dst, const uint8_t *src, size_t len);
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uint32_t (* crc32_fold_final) (struct crc32_fold_s *crc);
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uint32_t (* crc32_fold_reset) (struct crc32_fold_s *crc);
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void (* inflate_fast) (PREFIX3(stream) *strm, uint32_t start);
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uint32_t (* longest_match) (deflate_state *const s, Pos cur_match);
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uint32_t (* longest_match_slow) (deflate_state *const s, Pos cur_match);
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void (* slide_hash) (deflate_state *s);
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};
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Z_INTERNAL extern struct functable_s functable;
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/* Explicitly indicate functions are conditionally dispatched.
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*/
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# define FUNCTABLE_INIT functable.force_init()
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# define FUNCTABLE_CALL(name) functable.name
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# define FUNCTABLE_FPTR(name) functable.name
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#endif
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#endif
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