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[Bug target/68609] PowerPC reciprocal estimate missed opportunities
- From: "dje at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 15 Jan 2016 16:38:40 +0000
- Subject: [Bug target/68609] PowerPC reciprocal estimate missed opportunities
- Auto-submitted: auto-generated
- References: <bug-68609-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68609
--- Comment #4 from David Edelsohn <dje at gcc dot gnu.org> ---
Author: dje
Date: Fri Jan 15 16:38:08 2016
New Revision: 232439
URL: https://gcc.gnu.org/viewcvs?rev=232439&root=gcc&view=rev
Log:
PR target/68609
* config/rs6000/rs6000.c (rs6000_emit_msub): Delete.
(rs6000_emit_swsqrt): Convert to Goldschmidt's Algorithm
* config/rs6000/rs6000.md (sqrt<mode>2): Limit swsqrt to high
precision estimate.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
trunk/gcc/config/rs6000/rs6000.md