1*840b91ccSNathan Whitehorn /* $NetBSD: fpsetmask.c,v 1.3 2002/01/13 21:45:48 thorpej Exp $ */ 2*840b91ccSNathan Whitehorn 3*840b91ccSNathan Whitehorn /* 4*840b91ccSNathan Whitehorn * Copyright (c) 1999 The NetBSD Foundation, Inc. 5*840b91ccSNathan Whitehorn * All rights reserved. 6*840b91ccSNathan Whitehorn * 7*840b91ccSNathan Whitehorn * This code is derived from software contributed to The NetBSD Foundation 8*840b91ccSNathan Whitehorn * by Dan Winship. 9*840b91ccSNathan Whitehorn * 10*840b91ccSNathan Whitehorn * Redistribution and use in source and binary forms, with or without 11*840b91ccSNathan Whitehorn * modification, are permitted provided that the following conditions 12*840b91ccSNathan Whitehorn * are met: 13*840b91ccSNathan Whitehorn * 1. Redistributions of source code must retain the above copyright 14*840b91ccSNathan Whitehorn * notice, this list of conditions and the following disclaimer. 15*840b91ccSNathan Whitehorn * 2. Redistributions in binary form must reproduce the above copyright 16*840b91ccSNathan Whitehorn * notice, this list of conditions and the following disclaimer in the 17*840b91ccSNathan Whitehorn * documentation and/or other materials provided with the distribution. 18*840b91ccSNathan Whitehorn * 3. All advertising materials mentioning features or use of this software 19*840b91ccSNathan Whitehorn * must display the following acknowledgement: 20*840b91ccSNathan Whitehorn * This product includes software developed by the NetBSD 21*840b91ccSNathan Whitehorn * Foundation, Inc. and its contributors. 22*840b91ccSNathan Whitehorn * 4. Neither the name of The NetBSD Foundation nor the names of its 23*840b91ccSNathan Whitehorn * contributors may be used to endorse or promote products derived 24*840b91ccSNathan Whitehorn * from this software without specific prior written permission. 25*840b91ccSNathan Whitehorn * 26*840b91ccSNathan Whitehorn * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27*840b91ccSNathan Whitehorn * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28*840b91ccSNathan Whitehorn * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29*840b91ccSNathan Whitehorn * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30*840b91ccSNathan Whitehorn * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31*840b91ccSNathan Whitehorn * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32*840b91ccSNathan Whitehorn * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33*840b91ccSNathan Whitehorn * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34*840b91ccSNathan Whitehorn * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35*840b91ccSNathan Whitehorn * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36*840b91ccSNathan Whitehorn * POSSIBILITY OF SUCH DAMAGE. 37*840b91ccSNathan Whitehorn * 38*840b91ccSNathan Whitehorn */ 39*840b91ccSNathan Whitehorn 40*840b91ccSNathan Whitehorn #include <sys/cdefs.h> 41*840b91ccSNathan Whitehorn __FBSDID("$FreeBSD$"); 42*840b91ccSNathan Whitehorn 43*840b91ccSNathan Whitehorn #include <sys/types.h> 44*840b91ccSNathan Whitehorn #include <ieeefp.h> 45*840b91ccSNathan Whitehorn 46*840b91ccSNathan Whitehorn #ifndef _SOFT_FLOAT 47*840b91ccSNathan Whitehorn fp_except_t 48*840b91ccSNathan Whitehorn fpsetmask(fp_except_t mask) 49*840b91ccSNathan Whitehorn { 50*840b91ccSNathan Whitehorn u_int64_t fpscr; 51*840b91ccSNathan Whitehorn fp_rnd_t old; 52*840b91ccSNathan Whitehorn 53*840b91ccSNathan Whitehorn __asm__("mffs %0" : "=f"(fpscr)); 54*840b91ccSNathan Whitehorn old = (fp_rnd_t)((fpscr >> 3) & 0x1f); 55*840b91ccSNathan Whitehorn fpscr = (fpscr & 0xffffff07) | (mask << 3); 56*840b91ccSNathan Whitehorn __asm__ __volatile("mtfsf 0xff,%0" :: "f"(fpscr)); 57*840b91ccSNathan Whitehorn return (old); 58*840b91ccSNathan Whitehorn } 59*840b91ccSNathan Whitehorn #endif 60