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math: Remove erfcf fma usage

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The fma is not required to provide correctly rounded and it helps
on !__FP_FAST_FMA ISAs.
Reviewed-by: Paul Zimmermann <Paul.Zimmermann@inria.fr>
This commit is contained in:
Adhemerval Zanella
2025-10-10 14:49:23 -03:00
parent 68cb78eccc
commit fab32b6526
1 changed files with 1 additions and 1 deletions
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sysdeps/ieee754/flt-32/s_erfcf.c
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@@ -140,7 +140,7 @@ __erfcf (float xf)
const double iln2 = 0x1.71547652b82fep+0;
const double ln2h = 0x1.62e42fefap-8;
const double ln2l = 0x1.cf79abd6f5dc8p-47;
uint64_t jt = asuint64 (fma (x2, iln2, -(1024 + 0x1p-8)));
uint64_t jt = asuint64 (x2 * iln2 + -(1024 + 0x1p-8));
int64_t j = (int64_t) (jt << 12) >> 48;
double S = asdouble ((uint64_t)((j >> 7) + (0x3ff | sgn << 11)) << 52);
static const double ch[] =