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Relaxed SIMD.

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Nuno Cruces
2025-05-12 17:30:32 +01:00
parent 6bad547d3d
commit a0771f2363
1 changed files with 19 additions and 8 deletions
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27
sqlite3/libc/string.h
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@@ -333,10 +333,17 @@ char *strrchr(const char *s, int c) {
// http://0x80.pl/notesen/2018-10-18-simd-byte-lookup.html
#define _WASM_SIMD128_BITMAP256_T \
struct { \
uint8_t l __attribute__((__vector_size__(16), __aligned__(16))); \
uint8_t h __attribute__((__vector_size__(16), __aligned__(16))); \
#ifndef __wasm_relaxed_simd__
#define wasm_i8x16_relaxed_laneselect wasm_v128_bitselect
#define wasm_i8x16_relaxed_swizzle wasm_i8x16_swizzle
#endif // __wasm_relaxed_simd__
#define _WASM_SIMD128_BITMAP256_T \
struct { \
__u8x16 l; \
__u8x16 h; \
}
#define _WASM_SIMD128_SETBIT(bitmap, i) \
@@ -367,10 +374,11 @@ char *strrchr(const char *s, int c) {
v128_t _bitmask_lookup = wasm_u8x16_const(1, 2, 4, 8, 16, 32, 64, 128, \
1, 2, 4, 8, 16, 32, 64, 128); \
\
v128_t _bitmask = wasm_i8x16_swizzle(_bitmask_lookup, _hi_nibbles); \
v128_t _bitsets = wasm_v128_bitselect( \
wasm_i8x16_swizzle(bitmap.l, _lo_nibbles), \
wasm_i8x16_swizzle(bitmap.h, _lo_nibbles), \
v128_t _bitmask = \
wasm_i8x16_relaxed_swizzle(_bitmask_lookup, _hi_nibbles); \
v128_t _bitsets = wasm_i8x16_relaxed_laneselect( \
wasm_i8x16_relaxed_swizzle(bitmap.l, _lo_nibbles), \
wasm_i8x16_relaxed_swizzle(bitmap.h, _lo_nibbles), \
wasm_i8x16_lt(_hi_nibbles, wasm_u8x16_const_splat(8))); \
\
wasm_i8x16_eq(_bitsets & _bitmask, _bitmask); \
@@ -458,6 +466,9 @@ size_t strcspn(const char *s, const char *c) {
return s - a;
}
#undef wasm_i8x16_relaxed_laneselect
#undef wasm_i8x16_relaxed_swizzle
#undef _WASM_SIMD128_SETBIT
#undef _WASM_SIMD128_CHKBIT
#undef _WASM_SIMD128_CHKBITS