/*	$OpenBSD: fpsetsticky.c,v 1.2 2007/03/02 06:11:54 miod Exp $	*/
/*
 * Copyright (c) 2006 Miodrag Vallat.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice, this permission notice, and the disclaimer below
 * appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>
#include <ieeefp.h>

fp_except
fpsetsticky(fp_except mask)
{
	register_t fpscr, nfpscr;
#if defined(__SH4__) && !defined(__SH4_NOFPU__)
	extern register_t __fpscr_values[2];

	__fpscr_values[0] = (__fpscr_values[0] & ~(0x1f << 2)) | (mask << 2);
	__fpscr_values[1] = (__fpscr_values[1] & ~(0x1f << 2)) | (mask << 2);
#endif
	__asm__ __volatile__ ("sts fpscr, %0" : "=r" (fpscr));
	nfpscr = (fpscr & ~(0x1f << 2)) | (mask << 2);
	__asm__ __volatile__ ("lds %0, fpscr" : : "r" (nfpscr));
	return ((fpscr >> 2) & 0x1f);
}