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aarch64: Improve special-case handling in AdvSIMD double-precision libmvec routines

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Avoids emitting many saves/restores of vector registers, reduces the
amount of code generated around the scalar fallback.
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Joe Ramsay 2023-11-27 17:02:55 +00:00 • committed by Szabolcs Nagy
parent bc6d79f4ae
commit 7b12776584
1 changed files with 7 additions and 1 deletions
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8
sysdeps/aarch64/fpu/v_math.h
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@ -137,7 +137,13 @@ v_lookup_u64 (const uint64_t *tab, uint64x2_t idx)
static inline float64x2_t
v_call_f64 (double (*f) (double), float64x2_t x, float64x2_t y, uint64x2_t p)
{
return (float64x2_t){ p[0] ? f (x[0]) : y[0], p[1] ? f (x[1]) : y[1] };
double p1 = p[1];
double x1 = x[1];
if (__glibc_likely (p[0]))
y[0] = f (x[0]);
if (__glibc_likely (p1))
y[1] = f (x1);
return y;
}
static inline float64x2_t
v_call2_f64 (double (*f) (double, double), float64x2_t x1, float64x2_t x2,