diff options
Diffstat (limited to 'src/zlib-ng/arch/x86/chunk_permute_table.h')
| -rw-r--r-- | src/zlib-ng/arch/x86/chunk_permute_table.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/src/zlib-ng/arch/x86/chunk_permute_table.h b/src/zlib-ng/arch/x86/chunk_permute_table.h new file mode 100644 index 0000000..c7b2d2d --- /dev/null +++ b/src/zlib-ng/arch/x86/chunk_permute_table.h @@ -0,0 +1,53 @@ +/* chunk_permute_table.h - shared AVX/SSE4 permutation table for use with chunkmemset family of functions. + * For conditions of distribution and use, see copyright notice in zlib.h + */ + +#ifndef CHUNK_PERMUTE_TABLE_H_ +#define CHUNK_PERMUTE_TABLE_H_ + +#include "zbuild.h" + +/* Need entries for all numbers not an even modulus for 1, 2, 4, 8, 16 & 32 */ +static const ALIGNED_(32) uint8_t permute_table[26*32] = { + 0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1, /* dist 3 */ + 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, /* dist 5 */ + 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, /* dist 6 */ + 0, 1, 2, 3, 4, 5, 6, 0, 1, 2, 3, 4, 5, 6, 0, 1, 2, 3, 4, 5, 6, 0, 1, 2, 3, 4, 5, 6, 0, 1, 2, 3, /* dist 7 */ + 0, 1, 2, 3, 4, 5, 6, 7, 8, 0, 1, 2, 3, 4, 5, 6, 7, 8, 0, 1, 2, 3, 4, 5, 6, 7, 8, 0, 1, 2, 3, 4, /* dist 9 */ + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, /* dist 10 */ + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, /* dist 11 */ + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 0, 1, 2, 3, 4, 5, 6, 7, /* dist 12 */ + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 0, 1, 2, 3, 4, 5, /* dist 13 */ + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 0, 1, 2, 3, /* dist 14 */ + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 0, 1, /* dist 15 */ + + /* Beyond dists of 15 means we have to permute from a vector > len(m128i). Because AVX couldn't permute + * beyond 128 bit lanes until AVX512 for sub 4-byte sequences, we have to do some math here for an eventual + * blend with a comparison. That means we need to wrap the indices with yet another derived table. For simplicity, + * we'll use absolute indexing here to derive a blend vector. This is actually a lot simpler with ARM's TBL, but, + * this is what we're dealt. + */ + + 16, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, /* dist 17 */ + 16, 17, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, /* dist 18 */ + 16, 17, 18, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, /* dist 19 */ + 16, 17, 18, 19, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, /* dist 20 */ + 16, 17, 18, 19, 20, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, /* dist 21 */ + 16, 17, 18, 19, 20, 21, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, /* dist 22 */ + 16, 17, 18, 19, 20, 21, 22, 0, 1, 2, 3, 4, 5, 6, 7, 8, /* dist 23 */ + 16, 17, 18, 19, 20, 21, 22, 23, 0, 1, 2, 3, 4, 5, 6, 7, /* dist 24 */ + 16, 17, 18, 19, 20, 21, 22, 23, 24, 0, 1, 2, 3, 4, 5, 6, /* dist 25 */ + 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 0, 1, 2, 3, 4, 5, /* dist 26 */ + 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 0, 1, 2, 3, 4, /* dist 27 */ + 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 0, 1, 2, 3, /* dist 28 */ + 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 0, 1, 2, /* dist 29 */ + 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 0, 1, /* dist 30 */ + 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 0, /* dist 31 */ +}; + +typedef struct lut_rem_pair_s { + uint16_t idx; + uint16_t remval; +} lut_rem_pair; + +#endif |