1/*-
2 * Copyright (c) 2012 Ian Lepore <freebsd@damnhippie.dyndns.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <fenv.h>
31#include <float.h>
32
33#include "softfloat-for-gcc.h"
34#include "milieu.h"
35#include "softfloat.h"
36
37int
38__flt_rounds(void)
39{
40
41#ifndef ARM_HARD_FLOAT
42	/*
43	 * Translate our rounding modes to the unnamed
44	 * manifest constants required by C99 et. al.
45	 */
46	switch (__softfloat_float_rounding_mode) {
47	case FE_TOWARDZERO:
48		return (0);
49	case FE_TONEAREST:
50		return (1);
51	case FE_UPWARD:
52		return (2);
53	case FE_DOWNWARD:
54		return (3);
55	}
56	return (-1);
57#else /* ARM_HARD_FLOAT */
58	/*
59	 * Apparently, the rounding mode is specified as part of the
60	 * instruction format on ARM, so the dynamic rounding mode is
61	 * indeterminate.  Some FPUs may differ.
62	 */
63	return (-1);
64#endif /* ARM_HARD_FLOAT */
65}
66