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| author | H.J. Lu <hjl.tools@gmail.com> | 2017-10-22 08:06:46 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-10-22 08:06:58 -0700 |
| commit | 5c7adbd8eded546eb6e17a82f5ab3b35def47f38 (patch) | |
| tree | 028268e2e0619f90ed85bd1444421ab7ceabb3ff /ChangeLog | |
| 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 'ChangeLog')
| -rw-r--r-- | ChangeLog | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index 603cdae049..7e904dbdd4 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,6 +1,14 @@ 2017-10-22 H.J. Lu <hongjiu.lu@intel.com> * 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. + +2017-10-22 H.J. Lu <hongjiu.lu@intel.com> + + * 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. |