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Re: [PATCH] Optimized generic expf and exp2f
- From: Arjan van de Ven <arjan at linux dot intel dot com>
- To: Szabolcs Nagy <szabolcs dot nagy at arm dot com>, GNU C Library <libc-alpha at sourceware dot org>
- Cc: nd at arm dot com
- Date: Tue, 5 Sep 2017 12:32:31 -0700
- Subject: Re: [PATCH] Optimized generic expf and exp2f
- Authentication-results: sourceware.org; auth=none
- References: <59AED6DA.6000509@arm.com>
On 9/5/2017 9:54 AM, Szabolcs Nagy wrote:
Based on new expf and exp2f code from
https://github.com/ARM-software/optimized-routines/
with https://sourceware.org/ml/libc-alpha/2017-08/msg01126.html
expf reciprocal-throughput: 3.3x faster
expf latency: 1.7x faster
libm.so size: -8byte data, -2140byte text
expf/exp2f worst case nearest rounding ulp error: 0.502
you mentioned x86 data.. is that based on current git after
the recent optimizations (on a cpu with fma)?