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50e9ca06e2
So a lot of alterations had to be done to make this not worse and so far, it's not really better, either. I had to force inlining for the adler routine, I had to remove the x4 load instruction otherwise pipelining stalled, and I had to use restrict pointers with a copy idiom for GCC to inline a copy routine for the tail. Still, we see a small benefit in benchmarks, particularly when done with size of our window or larger. There's also an added benefit that this will fix #1824.
68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/* arm_functions.h -- ARM implementations for arch-specific functions.
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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 ARM_FUNCTIONS_H_
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#define ARM_FUNCTIONS_H_
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#ifdef ARM_NEON
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uint32_t adler32_neon(uint32_t adler, const uint8_t *buf, size_t len);
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uint32_t adler32_fold_copy_neon(uint32_t adler, uint8_t *dst, const uint8_t *src, size_t len);
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uint32_t chunksize_neon(void);
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uint8_t* chunkmemset_safe_neon(uint8_t *out, uint8_t *from, unsigned len, unsigned left);
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# ifdef HAVE_BUILTIN_CTZLL
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uint32_t compare256_neon(const uint8_t *src0, const uint8_t *src1);
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uint32_t longest_match_neon(deflate_state *const s, Pos cur_match);
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uint32_t longest_match_slow_neon(deflate_state *const s, Pos cur_match);
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# endif
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void slide_hash_neon(deflate_state *s);
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void inflate_fast_neon(PREFIX3(stream) *strm, uint32_t start);
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#endif
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#ifdef ARM_CRC32
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uint32_t crc32_armv8(uint32_t crc, const uint8_t *buf, size_t len);
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#endif
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#ifdef ARM_SIMD
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void slide_hash_armv6(deflate_state *s);
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#endif
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#ifdef DISABLE_RUNTIME_CPU_DETECTION
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// ARM - SIMD
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# if (defined(ARM_SIMD) && defined(__ARM_FEATURE_SIMD32)) || defined(ARM_NOCHECK_SIMD)
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# undef native_slide_hash
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# define native_slide_hash slide_hash_armv6
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# endif
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// ARM - NEON
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# if (defined(ARM_NEON) && (defined(__ARM_NEON__) || defined(__ARM_NEON))) || ARM_NOCHECK_NEON
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# undef native_adler32
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# define native_adler32 adler32_neon
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# define native_adler32_fold_copy adler32_fold_copy_neon
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# undef native_chunkmemset_safe
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# define native_chunkmemset_safe chunkmemset_safe_neon
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# undef native_chunksize
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# define native_chunksize chunksize_neon
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# undef native_inflate_fast
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# define native_inflate_fast inflate_fast_neon
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# undef native_slide_hash
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# define native_slide_hash slide_hash_neon
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# ifdef HAVE_BUILTIN_CTZLL
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# undef native_compare256
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# define native_compare256 compare256_neon
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# undef native_longest_match
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# define native_longest_match longest_match_neon
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# undef native_longest_match_slow
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# define native_longest_match_slow longest_match_slow_neon
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# endif
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# endif
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// ARM - CRC32
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# if (defined(ARM_CRC32) && defined(__ARM_FEATURE_CRC32))
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# undef native_crc32
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# define native_crc32 crc32_armv8
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# endif
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#endif
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#endif /* ARM_FUNCTIONS_H_ */
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