glibc/e_logf-fma.c at 2682b2720068a0f126135abd6724534ba3eca242 - 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 0ccc7153cc x86-64: Add logf with FMA

For workload-spec2017.wrf, on Skylake, it improves performance by:

                           Before            After     Improvement
reciprocal-throughput      16.1534          13.8874       16%
latency                    41.9642          34.3072       22%

	* 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.
	* sysdeps/x86_64/fpu/multiarch/e_logf.c: Likewise.

2017-10-22 08:05:15 -07:00

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	`#define __logf __logf_fma`

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