1/*	$NetBSD: fpsetmask.c,v 1.4 2005/12/24 23:10:08 perry Exp $	*/
2
3/*
4 * Written by J.T. Conklin, Apr 10, 1995
5 * Public domain.
6 */
7
8#include <sys/cdefs.h>
9#if defined(LIBC_SCCS) && !defined(lint)
10__RCSID("$NetBSD: fpsetmask.c,v 1.4 2005/12/24 23:10:08 perry Exp $");
11#endif /* LIBC_SCCS and not lint */
12
13#include "namespace.h"
14
15#include <ieeefp.h>
16
17#ifdef __weak_alias
18__weak_alias(fpsetmask,_fpsetmask)
19#endif
20
21#ifdef EXCEPTIONS_WITH_SOFTFLOAT
22extern fp_except _softfloat_float_exception_mask;
23#endif
24
25fp_except
26fpsetmask(mask)
27	fp_except mask;
28{
29	fp_except old;
30	fp_except new;
31
32	__asm("st %%fsr,%0" : "=m" (*&old));
33
34	new = old;
35	new &= ~(0x1f << 23);
36	new |= ((mask & 0x1f) << 23);
37
38	__asm("ld %0,%%fsr" : : "m" (*&new));
39
40	old = (old >> 23) & 0x1f;
41
42#ifdef EXCEPTIONS_WITH_SOFTFLOAT
43	/* update softfloat mask as well */
44	old |= _softfloat_float_exception_mask;
45	_softfloat_float_exception_mask = mask;
46#endif
47
48	return old;
49}
50