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[Bug math/6406] Improve performance of libm wrapper functions.
- From: "sjmunroe at us dot ibm dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: 15 Apr 2008 02:27:17 -0000
- Subject: [Bug math/6406] Improve performance of libm wrapper functions.
- References: <20080415015106.6406.sjmunroe@us.ibm.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From sjmunroe at us dot ibm dot com 2008-04-15 02:27 -------
Created an attachment (id=2692)
--> (http://sourceware.org/bugzilla/attachment.cgi?id=2692&action=view)
Example implementation of the x86_64 platform
This is an example for x86_64. So far it returns mixed results. the results are
disappointing for w_exp and w_log but an impressive 43% improvement for w_pow.
Not sure why the simpler w_exp and w_log case do not improve. As far as I can
tell the total path is shorter with this test patch.
This is only test and without this patch ./math/math_privated.h from the
previous patch maintains the existing implementation.
I am sure someone more skilled in x86_64 can devise a solution that retains the
gains for w_pow and resolves the problems with w_exp and w_log.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=6406
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