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author | H.J. Lu <hjl.tools@gmail.com> | 2018-01-08 08:04:26 -0800 |
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committer | H.J. Lu <hjl.tools@gmail.com> | 2018-01-08 08:04:40 -0800 |
commit | c70e4e9c9efff9df4c847dd7cfd81bae674219ab (patch) | |
tree | 46cbbfb74a8c03e933fc4245c66559def374b1a8 /sysdeps/x86_64/fpu/multiarch/svml_d_pow8_core.c | |
parent | 579396ee082565ab5f42ff166a264891223b7b82 (diff) | |
download | glibc-c70e4e9c9efff9df4c847dd7cfd81bae674219ab.tar.gz glibc-c70e4e9c9efff9df4c847dd7cfd81bae674219ab.tar.xz glibc-c70e4e9c9efff9df4c847dd7cfd81bae674219ab.zip |
x86-64: Add sincosf with vector FMA
Since the x86-64 assembly version of sincosf is higly optimized with vector instructions, there isn't much room for improvement. However s_sincosf.c written in C with vector math and intrinsics can be optimized by GCC with FMA. On Skylake, bench-sincosf reports performance improvement: Assembly FMA improvement max 104.042 101.008 3% min 9.426 8.586 10% mean 20.6209 18.2238 13% * sysdeps/x86_64/fpu/multiarch/Makefile (libm-sysdep_routines): Add s_sincosf-sse2 and s_sincosf-fma. (CFLAGS-s_sincosf-fma.c): New. * sysdeps/x86_64/fpu/multiarch/s_sincosf-fma.c: New file. * sysdeps/x86_64/fpu/multiarch/s_sincosf-sse2.S: Likewise. * sysdeps/x86_64/fpu/multiarch/s_sincosf.c: Likewise. * sysdeps/x86_64/fpu/s_sincosf.S: Don't add alias if __sincosf is defined.
Diffstat (limited to 'sysdeps/x86_64/fpu/multiarch/svml_d_pow8_core.c')
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