xref: /openbsd/lib/libc/arch/arm/gen/fpgetround.c (revision 09467b48)
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
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