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| author | H.J. Lu <hjl.tools@gmail.com> | 2023-08-11 08:04:08 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2023-08-14 08:14:19 -0700 |
| commit | 1b214630ce6f7e0099b8b6f87246246739b079cf (patch) | |
| tree | bed526aa9ce38f6c09e144cf27fc24128b0b12c0 /sysdeps/ieee754 | |
| parent | dd2794d6680d322754464448a25916ee199ce678 (diff) | |
| download | glibc-1b214630ce6f7e0099b8b6f87246246739b079cf.tar.gz glibc-1b214630ce6f7e0099b8b6f87246246739b079cf.tar.xz glibc-1b214630ce6f7e0099b8b6f87246246739b079cf.zip | |
x86_64: Add expm1 with FMA
On Skylake, it improves expm1 bench performance by:
Before After Improvement
max 70.204 68.054 3%
min 20.709 16.2 22%
mean 22.1221 16.7367 24%
NB: Add
extern long double __expm1l (long double);
extern long double __expm1f128 (long double);
for __typeof (__expm1l) and __typeof (__expm1f128) when __expm1 is
defined since __expm1 may be expanded in their declarations which
causes the build failure.
Diffstat (limited to 'sysdeps/ieee754')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/s_expm1.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_expm1.c b/sysdeps/ieee754/dbl-64/s_expm1.c index 8f1c95bd04..1cafeca9c0 100644 --- a/sysdeps/ieee754/dbl-64/s_expm1.c +++ b/sysdeps/ieee754/dbl-64/s_expm1.c @@ -130,6 +130,11 @@ static const double 4.00821782732936239552e-06, /* 3ED0CFCA 86E65239 */ -2.01099218183624371326e-07 }; /* BE8AFDB7 6E09C32D */ +#ifndef SECTION +# define SECTION +#endif + +SECTION double __expm1 (double x) { @@ -258,4 +263,6 @@ __expm1 (double x) } return y; } +#ifndef __expm1 libm_alias_double (__expm1, expm1) +#endif |