glibc/e_log2f-fma.c at a9f782823f211333409e3f39d3e29240693c9df1 - glibc - Gitea: Git with a cup of tea

AuroraMiddleware/glibc

mirror of https://sourceware.org/git/glibc.git synced 2024-11-30 00:31:08 +00:00

H.J. Lu 5c7adbd8ed 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.

2017-10-22 08:06:58 -07:00

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	`#define __log2f __log2f_fma`

	`#include <sysdeps/ieee754/flt-32/e_log2f.c>`