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[PATCH, i386]: Use mxcsr register to set SFP rounding mode for 64bit targets

From: Uros Bizjak <ubizjak at gmail dot com>
To: gcc-patches at gcc dot gnu dot org
Date: Wed, 10 Oct 2012 20:34:31 +0200
Subject: [PATCH, i386]: Use mxcsr register to set SFP rounding mode for 64bit targets

Hello!

For 64bit targets, we can use mxcsr register to set soft-FP rounding mode.

2012-10-10  Uros Bizjak  <ubizjak@gmail.com>

	* config/i386/sfp-machine.h (FP_RND_NEAREST, FP_RND_ZERO, FP_RND_PINF,
	FP_RND_MINF, FP_RND_MASK, FP_INIT_ROUNDMODE, _FP_DECL_EX): Move to ...
	* config/i386/32/sfp-machine.h: ... here.
	* config/i386/64/sfp-machine.h (FP_RND_NEAREST, FP_RND_ZERO,
	FP_RND_PINF, FP_RND_MINF, FP_RND_MASK, FP_INIT_ROUNDMODE, _FP_DECL_EX):
	New defines.

Bootstrapped and regression tested on x86_64-pc-linux-gnu {,-m32},
committed to mainline SVN.

Uros.

Attachment: g.diff.txt
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