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Re: j0_downward failures on i686 with gcc 6.
- From: Joseph Myers <joseph at codesourcery dot com>
- To: Carlos O'Donell <carlos at redhat dot com>
- Cc: GNU C Library <libc-alpha at sourceware dot org>
- Date: Tue, 1 Mar 2016 15:42:56 +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>
On Tue, 1 Mar 2016, Carlos O'Donell wrote:
> Joseph,
>
> On i686 using GCC 6.0 I see some additional +1 ULP changes in j0.
>
> Does this seem like normal compiler-induced changed in precision?
Yes - on i686, different register allocation choices affecting which
intermediate values are stored in excess precision.
--
Joseph S. Myers
joseph@codesourcery.com