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This commit is contained in:
Justine Tunney 2020-12-01 03:43:40 -08:00
parent 3e4fd4b0ad
commit e44a0cf6f8
256 changed files with 23100 additions and 2294 deletions
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8
libc/intrin/pext.h
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@ -3,14 +3,18 @@
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
/* TODO(jart): Implement polyfill. */
#define pext(NUMBER, BITMASK) \
uint64_t pext(uint64_t, uint64_t) pureconst;
#define PEXT(NUMBER, BITMASK) \
({ \
typeof(BITMASK) ShuffledBits, Number = (NUMBER); \
asm("pext\t%2,%1,%0" : "=r"(ShuffledBits) : "r"(Number), "rm"(BITMASK)); \
ShuffledBits; \
})
#define pext(NUMBER, BITMASK) \
(!X86_HAVE(BMI2) ? pext(NUMBER, BITMASK) : PEXT(NUMBER, BITMASK))
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_INTRIN_PEXT_H_ */