1 /*        $NetBSD: flt_rounds.c,v 1.9 2015/03/19 21:22:59 joerg Exp $ */
2 
3 /*
4  * Written by J.T. Conklin, Apr 11, 1995
5  * Public domain.
6  */
7 
8 #include <sys/cdefs.h>
9 #if defined(LIBC_SCCS) && !defined(lint)
10 __RCSID("$NetBSD: flt_rounds.c,v 1.9 2015/03/19 21:22:59 joerg Exp $");
11 #endif /* LIBC_SCCS and not lint */
12 
13 #include "namespace.h"
14 #include <machine/float.h>
15 #include <ieeefp.h>
16 
17 static const int map[] = {
18           1,        /* round to nearest */
19           0,        /* round to zero */
20           2,        /* round to positive infinity */
21           3         /* round to negative infinity */
22 };
23 
24 int
__flt_rounds(void)25 __flt_rounds(void)
26 {
27 #ifdef SOFTFLOAT_FOR_GCC
28           return map[fpgetround()];
29 #else
30           int x;
31 
32           __asm(".set push; .set noat; cfc1 %0,$31; .set pop" : "=r" (x));
33           return map[x & 0x03];
34 #endif
35 }
36