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Fix SHUFPD and SHUFPS and add fuzz tests

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See: https://github.com/jart/blink/issues/72
See: https://github.com/jart/blink/issues/68
This commit is contained in:
Justine Tunney 2023-03-05 16:12:28 -08:00
parent 2aa044cb0c
commit 2112fb1736
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GPG key ID: BE714B4575D6E328
6 changed files with 182 additions and 2 deletions
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31
libc/intrin/shufpd.h
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@ -5,6 +5,37 @@ COSMOPOLITAN_C_START_
void shufpd(double[2], const double[2], const double[2], uint8_t);
#if !defined(__STRICT_ANSI__) && !defined(__chibicc__)
typedef double shufpd_t _Vector_size(16) forcealign(16) mayalias;
shufpd_t shufpdjt(shufpd_t, shufpd_t);
#define shufpd(C, B, A, I) \
do { \
if (__builtin_expect(X86_NEED(SSE) && X86_HAVE(SSSE3), 1)) { \
shufpd_t *Xmm0 = (void *)(C); \
const shufpd_t *Xmm1 = (const shufpd_t *)(B); \
const shufpd_t *Xmm2 = (const shufpd_t *)(A); \
if (__builtin_constant_p(I)) { \
if (!X86_NEED(AVX)) { \
asm("shufpd\t%2,%1,%0" \
: "=x"(*Xmm0) \
: "x"(*Xmm2), "i"(I), "0"(*Xmm1)); \
} else { \
asm("vshufpd\t%3,%2,%1,%0" \
: "=x"(*Xmm0) \
: "x"(*Xmm1), "x"(*Xmm2), "i"(I)); \
} \
} else { \
uint8_t Vimm = (I); \
typeof(shufpdjt) *Fn; \
Fn = (typeof(shufpdjt) *)((uintptr_t)&shufpdjt + Vimm * 8); \
*Xmm0 = Fn(*Xmm1, *Xmm2); \
} \
} else { \
shufpd(C, B, A, I); \
} \
} while (0)
#endif
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_INTRIN_SHUFPD_H_ */