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File: [cvs.NetBSD.org] / src / lib / libc / arch / x86_64 / gen / fpgetround.S (download)

Revision 1.4, Fri Sep 30 17:42:34 2011 UTC (9 years, 1 month ago) by christos
Branch: MAIN
CVS Tags: yamt-pagecache-tag8, yamt-pagecache-base9, yamt-pagecache-base8, yamt-pagecache-base7, yamt-pagecache-base6, yamt-pagecache-base5, yamt-pagecache-base4, yamt-pagecache-base3, yamt-pagecache-base2, yamt-pagecache-base, yamt-pagecache, riastradh-xf86-video-intel-2-7-1-pre-2-21-15, riastradh-drm2-base3, riastradh-drm2-base2, riastradh-drm2-base1, riastradh-drm2-base, riastradh-drm2, netbsd-6-base, netbsd-6-1-RELEASE, netbsd-6-1-RC4, netbsd-6-1-RC3, netbsd-6-1-RC2, netbsd-6-1-RC1, netbsd-6-1-5-RELEASE, netbsd-6-1-4-RELEASE, netbsd-6-1-3-RELEASE, netbsd-6-1-2-RELEASE, netbsd-6-1-1-RELEASE, netbsd-6-1, netbsd-6-0-RELEASE, netbsd-6-0-RC2, netbsd-6-0-RC1, netbsd-6-0-6-RELEASE, netbsd-6-0-5-RELEASE, netbsd-6-0-4-RELEASE, netbsd-6-0-3-RELEASE, netbsd-6-0-2-RELEASE, netbsd-6-0-1-RELEASE, netbsd-6-0, netbsd-6, matt-nb6-plus-nbase, matt-nb6-plus-base, matt-nb6-plus, agc-symver-base, agc-symver
Branch point for: tls-maxphys, tls-earlyentropy
Changes since 1.3: +4 -5 lines

PR/44293: Paul Goyette: Fix the mess of the rounding code.

/*	$NetBSD: fpgetround.S,v 1.4 2011/09/30 17:42:34 christos Exp $	*/

/*
 * Written by J.T. Conklin, Apr 4, 1995
 * Public domain.
 */

#include <machine/asm.h>

/*
 * XXX load only x87 state. If an application only uses the fp*
 * interface, this should be in sync with the SSE mxcsr register.
 */

#ifdef WEAK_ALIAS
WEAK_ALIAS(fpgetround, _fpgetround)
ENTRY(_fpgetround)
#else
ENTRY(fpgetround)
#endif
	fnstcw -4(%rsp)
	movl -4(%rsp), %eax
	andl $0x00000c00, %eax
	ret