1/*	$NetBSD: fpsetmask.c,v 1.5 2005/12/24 23:10:08 perry Exp $	*/
2
3/*
4 * Written by J.T. Conklin, Apr 11, 1995
5 * Public domain.
6 */
7
8#include <sys/cdefs.h>
9__FBSDID("$FreeBSD$");
10#if defined(LIBC_SCCS) && !defined(lint)
11__RCSID("$NetBSD: fpsetmask.c,v 1.5 2005/12/24 23:10:08 perry Exp $");
12#endif /* LIBC_SCCS and not lint */
13
14#include "namespace.h"
15
16#include <ieeefp.h>
17
18#ifdef __weak_alias
19__weak_alias(fpsetmask,_fpsetmask)
20#endif
21
22fp_except_t
23fpsetmask(mask)
24	fp_except_t mask;
25{
26	fp_except_t old;
27	fp_except_t new;
28
29	__asm("cfc1 %0,$31" : "=r" (old));
30
31	new = old;
32	new &= ~(0x1f << 7);
33	new |= ((mask & 0x1f) << 7);
34
35	__asm("ctc1 %0,$31" : : "r" (new));
36
37	return (old >> 7) & 0x1f;
38}
39