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| author | H.J. Lu <hjl.tools@gmail.com> | 2017-10-22 08:03:46 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-10-22 08:05:15 -0700 |
| commit | 0ccc7153ccd8fbecefb0793a65cd5a85cdb099fc (patch) | |
| tree | e1e3035d3f0048d9b822ce6a4c9128f90ce5e946 /sysdeps/x86_64/fpu/multiarch/e_logf-fma.c | |
| parent | fe596486d694e657413d0d4c5a04598674ff71b1 (diff) | |
| download | glibc-0ccc7153ccd8fbecefb0793a65cd5a85cdb099fc.tar.gz glibc-0ccc7153ccd8fbecefb0793a65cd5a85cdb099fc.tar.xz glibc-0ccc7153ccd8fbecefb0793a65cd5a85cdb099fc.zip | |
x86-64: Add logf with FMA
For workload-spec2017.wrf, on Skylake, it improves performance by:
Before After Improvement
reciprocal-throughput 16.1534 13.8874 16%
latency 41.9642 34.3072 22%
* sysdeps/x86_64/fpu/multiarch/Makefile (libm-sysdep_routines):
Add e_logf-fma.
(CFLAGS-e_logf-fma.c): New.
* sysdeps/x86_64/fpu/multiarch/e_logf-fma.c: New file.
* sysdeps/x86_64/fpu/multiarch/e_logf.c: Likewise.
Diffstat (limited to 'sysdeps/x86_64/fpu/multiarch/e_logf-fma.c')
| -rw-r--r-- | sysdeps/x86_64/fpu/multiarch/e_logf-fma.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sysdeps/x86_64/fpu/multiarch/e_logf-fma.c b/sysdeps/x86_64/fpu/multiarch/e_logf-fma.c new file mode 100644 index 0000000000..a47fd8195f --- /dev/null +++ b/sysdeps/x86_64/fpu/multiarch/e_logf-fma.c @@ -0,0 +1,3 @@ +#define __logf __logf_fma + +#include <sysdeps/ieee754/flt-32/e_logf.c> |