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| author | H.J. Lu <hjl.tools@gmail.com> | 2017-08-16 08:43:35 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-08-16 08:46:05 -0700 |
| commit | 6d5f5b16bc4bd3945e138509d7986a5231ab5ee6 (patch) | |
| tree | adbaec0e7ea9b1ba01b4cff58431e25bd3d0d091 /misc/preadv.c | |
| parent | ce3e7f4136a9f5943328c74511542834ca05811b (diff) | |
| download | glibc-hjl/fma/2.26.tar.gz glibc-hjl/fma/2.26.tar.xz glibc-hjl/fma/2.26.zip | |
x86-64: Optimize e_expf with FMA [BZ #21912] hjl/fma/2.26
FMA optimized e_expf improves performance by more than 50% on Skylake. [BZ #21912] * sysdeps/x86_64/fpu/multiarch/Makefile (libm-sysdep_routines): Add e_expf-fma. * sysdeps/x86_64/fpu/multiarch/e_expf-fma.S: New file. * sysdeps/x86_64/fpu/multiarch/e_expf.c: Likewise. * sysdeps/x86_64/fpu/multiarch/ifunc-fma.h: Likewise. (cherry picked from commit 24a2e6588d2e0c91b4003878b0625d4a9360e8f3)
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