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author | H.J. Lu <hjl.tools@gmail.com> | 2017-10-22 08:06:46 -0700 |
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committer | H.J. Lu <hjl.tools@gmail.com> | 2017-10-22 08:06:58 -0700 |
commit | 5c7adbd8eded546eb6e17a82f5ab3b35def47f38 (patch) | |
tree | 028268e2e0619f90ed85bd1444421ab7ceabb3ff /sysdeps/x86_64/fpu/multiarch/e_log2f-fma.c | |
parent | 0ccc7153ccd8fbecefb0793a65cd5a85cdb099fc (diff) | |
download | glibc-5c7adbd8eded546eb6e17a82f5ab3b35def47f38.tar.gz glibc-5c7adbd8eded546eb6e17a82f5ab3b35def47f38.tar.xz glibc-5c7adbd8eded546eb6e17a82f5ab3b35def47f38.zip |
x86-64: Add log2f with FMA
For workload-spec2017.wrf, on Skylake, it improves performance by: Before After Improvement reciprocal-throughput 16.5937 14.0789 17% latency 41.7755 35.3586 18% * sysdeps/x86_64/fpu/multiarch/Makefile (libm-sysdep_routines): Add e_log2f-fma. (CFLAGS-e_log2f-fma.c): New. * sysdeps/x86_64/fpu/multiarch/e_log2f-fma.c: New file. * sysdeps/x86_64/fpu/multiarch/e_log2f.c: Likewise.
Diffstat (limited to 'sysdeps/x86_64/fpu/multiarch/e_log2f-fma.c')
-rw-r--r-- | sysdeps/x86_64/fpu/multiarch/e_log2f-fma.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sysdeps/x86_64/fpu/multiarch/e_log2f-fma.c b/sysdeps/x86_64/fpu/multiarch/e_log2f-fma.c new file mode 100644 index 0000000000..8a76b836fb --- /dev/null +++ b/sysdeps/x86_64/fpu/multiarch/e_log2f-fma.c @@ -0,0 +1,3 @@ +#define __log2f __log2f_fma + +#include <sysdeps/ieee754/flt-32/e_log2f.c> |