PATCH: optimized libm single precision routines: erfcf, erff, expf for x86_64.

Quentin Neill quentin.neill.gnu@gmail.com
Wed Feb 22 16:47:00 GMT 2012


On Mon, Feb 06, 2012; 03:28am, Dmitrieva Liubov
<liubov.dmitrieva@gmail.com> wrote:
> Our performance tests show (in the table here is a ratio: time of test
> with libm from current master branch / time of test with libm from
> current master branch after applying the patch.)
>
>  	on Istanbul	on    on Atom   on Neha-lem     on AVX
> erfcf  1.53	                1.26        1.81                  1.06
> erff    1.52	                1.32        2.02                  1.08
> expf   2.33                 1.40        2.57                  6.55


On Tue, Feb 21, 2012 at 15:32, Dmitrieva Liubov
<liubov.dmitrieva@gmail.com> wrote:
> Performance of the benchmark we use (time):
> Istanbul/Atom/Nehalem/AVX
>
> GLIBC-master:       148         224         122         246
> Attached version:    51.93      97.23      33.12      26.71

To be clear, what benchmark is being run above?

-- 
Quentin



More information about the Libc-alpha mailing list