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Re: Fix powerpc round, roundf spurious "inexact" (bug 19238) [committed]
- From: Joseph Myers <joseph at codesourcery dot com>
- To: Steven Munroe <munroesj at linux dot vnet dot ibm dot com>
- Cc: Tulio Magno Quites Machado Filho <tuliom at linux dot vnet dot ibm dot com>, Carlos Eduardo Seo <cseo at linux dot vnet dot ibm dot com>, <libc-alpha at sourceware dot org>
- Date: Thu, 17 Dec 2015 16:55:52 +0000
- Subject: Re: Fix powerpc round, roundf spurious "inexact" (bug 19238) [committed]
- Authentication-results: sourceware.org; auth=none
- References: <alpine dot DEB dot 2 dot 10 dot 1511121900250 dot 6391 at digraph dot polyomino dot org dot uk> <1450369489 dot 7571 dot 10 dot camel at oc7878010663>
On Thu, 17 Dec 2015, Steven Munroe wrote:
> > This issue and fix do not apply to builds using power5+ versions of
> > round and roundf, which use the frin instruction and avoid "inexact"
> > exceptions that way.
> >
> Joseph this gets confusing when we introduce the multiarch IFUNC
> support. In a modern system (POWER6/7/8 the code below should never be
> used. The code from:
Yes, I already said this code isn't used when the power5+ versions are
used. My 64-bit powerpc testing is on a POWER4 system and my 32-bit
testing is on a 476 system; although I now have access to a little-endian
POWER8 system I haven't tried glibc testing there.
--
Joseph S. Myers
joseph@codesourcery.com