10SN/A/*	$NetBSD: flt_rounds.c,v 1.4.10.3 2002/03/22 20:41:53 nathanw Exp $	*/
20SN/A
30SN/A/*
40SN/A * Copyright (c) 1996 Mark Brinicombe
50SN/A * All rights reserved.
6662Savstepan *
70SN/A * Redistribution and use in source and binary forms, with or without
80SN/A * modification, are permitted provided that the following conditions
90SN/A * are met:
100SN/A * 1. Redistributions of source code must retain the above copyright
11157SN/A *    notice, this list of conditions and the following disclaimer.
120SN/A * 2. Redistributions in binary form must reproduce the above copyright
13157SN/A *    notice, this list of conditions and the following disclaimer in the
140SN/A *    documentation and/or other materials provided with the distribution.
150SN/A * 3. All advertising materials mentioning features or use of this software
160SN/A *    must display the following acknowledgement:
170SN/A *      This product includes software developed by Mark Brinicombe
180SN/A *	for the NetBSD Project.
190SN/A * 4. The name of the author may not be used to endorse or promote products
200SN/A *    derived from this software without specific prior written permission
210SN/A *
220SN/A * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
230SN/A * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
240SN/A * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25157SN/A * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26157SN/A * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27157SN/A * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
280SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
290SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
300SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
310SN/A * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
320SN/A */
330SN/A
340SN/A#include <sys/cdefs.h>
350SN/A__FBSDID("$FreeBSD$");
36662Savstepan
370SN/A#include <sys/types.h>
380SN/A#include <machine/float.h>
390SN/A
400SN/A#ifndef _SOFT_FLOAT
41static const int map[] = {
42	1,	/* round to nearest */
43	0,	/* round to zero */
44	2,	/* round to positive infinity */
45	3	/* round to negative infinity */
46};
47
48int
49__flt_rounds()
50{
51	uint64_t fpscr;
52
53	__asm__ __volatile("mffs %0" : "=f"(fpscr));
54	return map[(fpscr & 0x03)];
55}
56#endif
57