From: Jonathan Wakely <jwakely.gcc@gmail.com>
To: Mathieu Malaterre <mathieu.malaterre@gmail.com>
Cc: gcc-help <gcc-help@gcc.gnu.org>
Subject: Re: FLT_EVAL_METHOD vs fexcess-precision
Date: Fri, 1 Sep 2023 11:28:57 +0100 [thread overview]
Message-ID: <CAH6eHdRbkiNzCERgDe5HH+5pER9967dNqjt8VowhRFs1VFw5zw@mail.gmail.com> (raw)
In-Reply-To: <CA+7wUszxSM=ikux0wYb=WyWo2EmBEPodpfYS651JS+QE3U=r4g@mail.gmail.com>
On Fri, 1 Sept 2023 at 10:57, Mathieu Malaterre via Gcc-help
<gcc-help@gcc.gnu.org> wrote:
>
> Hi all,
>
> I am reading a previous post from Pascal Cuoq(*), and it seems things
> have changed quite a bit in GCC nowadays. I fail to understand how
> FLT_EVAL_METHOD relates to fexcess-precision. Did I miss something?
>
> ---
>
> Here is what I see on my Debian/sid/i386 system:
It looks to me like the difference is that you're using i386 (welcome,
time traveller!) where -mfpmath=i387 is the default, so
FLT_EVAL_METHOD=2. I think Pascal's SO answer uses x86_64, where the
default is -mfpmath=sse and so FLT_EVAL_METHOD=0, but changes to 2
when he uses -mfpmath=i387.
next prev parent reply other threads:[~2023-09-01 10:29 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-01 9:55 Mathieu Malaterre
2023-09-01 10:14 ` Jonathan Wakely
2023-09-01 10:19 ` Jonathan Wakely
2023-09-01 10:28 ` Jonathan Wakely [this message]
2023-09-01 12:02 ` Mathieu Malaterre
2023-09-01 12:19 ` Jonathan Wakely
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