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Re: j0_downward failures on i686 with gcc 6.
- From: Joseph Myers <joseph at codesourcery dot com>
- To: Szabolcs Nagy <szabolcs dot nagy at arm dot com>
- Cc: Carlos O'Donell <carlos at redhat dot com>, GNU C Library <libc-alpha at sourceware dot org>, <nd at arm dot com>
- Date: Tue, 1 Mar 2016 18:39:06 +0000
- Subject: Re: j0_downward failures on i686 with gcc 6.
- Authentication-results: sourceware.org; auth=none
- References: <56D5B757 dot 3070900 at redhat dot com> <alpine dot DEB dot 2 dot 10 dot 1603011542160 dot 13931 at digraph dot polyomino dot org dot uk> <56D5C546 dot 6040509 at arm dot com>
On Tue, 1 Mar 2016, Szabolcs Nagy wrote:
> > Yes - on i686, different register allocation choices affecting which
> > intermediate values are stored in excess precision.
> >
>
> i think that should not happen with -std=c99, if
That's irrelevant to building glibc, which uses -std=gnu99 plus macros to
eliminate excess range and precision in cases where it is actually a
problem.
--
Joseph S. Myers
joseph@codesourcery.com