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Re: [PATCH] Optimized generic expf and exp2f
- From: Szabolcs Nagy <szabolcs dot nagy at arm dot com>
- To: Joseph Myers <joseph at codesourcery dot com>, Arjan van de Ven <arjan at linux dot intel dot com>
- Cc: nd at arm dot com, GNU C Library <libc-alpha at sourceware dot org>
- Date: Wed, 06 Sep 2017 10:23:30 +0100
- Subject: Re: [PATCH] Optimized generic expf and exp2f
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On 05/09/17 21:58, Joseph Myers wrote:
> On Tue, 5 Sep 2017, Arjan van de Ven wrote:
>
>> you mentioned x86 data.. is that based on current git after
>> the recent optimizations (on a cpu with fma)?
>
> Really you need to compare with both the fma and non-fma versions (and
> compare the C version built both with and without fma, since one
> possibility would be that the C version can replace the x86_64 ones but
> should be built twice, with and without fma, to achieve that replacement).
>
i don't have a machine with fma, i tested it on
an older cpu (but i did test against git tip,
using gcc-7).