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Re: Fix x86_64 -mfpmath=387 float_t, double_t (bug 20787) [committed]

From: Florian Weimer <fweimer at redhat dot com>
To: libc-alpha at sourceware dot org
Date: Wed, 23 Nov 2016 20:15:36 +0100
Subject: Re: Fix x86_64 -mfpmath=387 float_t, double_t (bug 20787) [committed]
Authentication-results: sourceware.org; auth=none
References: <alpine.DEB.2.20.1611231756530.31292@digraph.polyomino.org.uk>

On 11/23/2016 06:57 PM, Joseph Myers wrote:

Bug 20787 reports that, while float_t and double_t for 32-bit x86
properly respect -mfpmath=sse, for x86_64 they fail to reflect
-mfpmath=387, which is valid if unusual and results in FLT_EVAL_METHOD
being 2.  This patch fixes the definitions to respect
__FLT_EVAL_METHOD__ in that case, arranging for the test that the
types correspond with FLT_EVAL_METHOD to be run with both -mfpmath=387
and -mfpmath=sse.

If I read the patch correctly, this changes the float_t type for those(obscure) configurations. Doesn't this warrant a NEWS entry?


Thanks,
Florian

Follow-Ups:
- Re: Fix x86_64 -mfpmath=387 float_t, double_t (bug 20787) [committed]
  - From: Joseph Myers

References:
- Fix x86_64 -mfpmath=387 float_t, double_t (bug 20787) [committed]
  - From: Joseph Myers

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