1 /* $OpenBSD: fpgetround.c,v 1.1 2018/02/28 11:16:54 kettenis Exp $ */
2 /*
3 * Copyright (c) 2018 Mark Kettenis <kettenis@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include <ieeefp.h>
19 #ifdef SOFTFLOAT_FOR_GCC
20 #include "softfloat-for-gcc.h"
21 #endif
22 #include "milieu.h"
23 #include <softfloat.h>
24 #include <stdint.h>
25
26 __weak_alias(_fpgetround,fpgetround);
27
28 fp_rnd
fpgetround(void)29 fpgetround(void)
30 {
31 uint32_t fpscr;
32
33 __asm volatile("vmrs %0, fpscr" : "=r" (fpscr));
34
35 return ((fpscr >> 22) & 3);
36 }
37 DEF_WEAK(fpgetround);
38