/*	$NetBSD: fpsetmask.c,v 1.5 2005/12/24 23:10:08 perry Exp $	*/

/*
 * Written by J.T. Conklin, Apr 11, 1995
 * Public domain.
 */

#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: fpsetmask.c,v 1.5 2005/12/24 23:10:08 perry Exp $");
#endif /* LIBC_SCCS and not lint */

#include "namespace.h"

#include <ieeefp.h>

#ifdef __weak_alias
__weak_alias(fpsetmask,_fpsetmask)
#endif

fp_except_t
fpsetmask(mask)
	fp_except_t mask;
{
	fp_except_t old;
	fp_except_t new;

	__asm("cfc1 %0,$31" : "=r" (old));

	new = old;
	new &= ~(0x1f << 7); 
	new |= ((mask & 0x1f) << 7);

	__asm("ctc1 %0,$31" : : "r" (new));

	return (old >> 7) & 0x1f;
}