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Re: [PATCH] x86-64: Add sinf with FMA


On 12/8/2017 8:02 AM, Nick Alcock wrote:
On 4 Dec 2017, H. J. Lu uttered the following:

On Skylake, bench-sinf reports performance improvement:

             Before        After         Improvement
max        153.996       100.094           54%
min        8.546         6.852             25%
mean       18.1223       14.4616           25%

Any comments?

Do we have any benchmark runs on older processors? They're not remotely
obsolete: Intel is still selling Broadwell server parts, and the vast
majority of SSE2-capable parts out there at present are not as new as
Skylake.

(oh and Haswell & Broadwell also support FMA already)


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