Bug 430208 (PR54077)

Summary:	sys-devel/gcc-4.7.1: integer performance is 30% slower than gcc 4.6
Product:	Gentoo Linux	Reporter:	wbrana
Component:	[OLD] Core system	Assignee:	Gentoo Toolchain Maintainers <toolchain>
Status:	RESOLVED UPSTREAM
Severity:	normal	Keywords:	REGRESSION
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	http://gcc.gnu.org/PR54077
See Also:	http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54077
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	reverse patch which restores performance

Description wbrana 2012-08-06 18:01:19 UTC

Created attachment 320576 [details, diff]
reverse patch which restores performance

gcc 4.7 is 30% slower than 4.6 in Bytemark FP EMU
upstream bug http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54077

Comment 1 SpanKY gentoo-dev

2012-08-06 22:23:53 UTC

we'll wait to see what upstream merges before adding it to our patchset

Comment 2 wbrana 2012-08-06 22:27:53 UTC

floating point emulation using integer is slower not floating point