10SN/A/* $NetBSD: flt_rounds.c,v 1.4.10.3 2002/03/22 20:41:53 nathanw Exp $ */ 20SN/A 30SN/A/* 40SN/A * Copyright (c) 1996 Mark Brinicombe 50SN/A * All rights reserved. 6662Savstepan * 70SN/A * Redistribution and use in source and binary forms, with or without 80SN/A * modification, are permitted provided that the following conditions 90SN/A * are met: 100SN/A * 1. Redistributions of source code must retain the above copyright 11157SN/A * notice, this list of conditions and the following disclaimer. 120SN/A * 2. Redistributions in binary form must reproduce the above copyright 13157SN/A * notice, this list of conditions and the following disclaimer in the 140SN/A * documentation and/or other materials provided with the distribution. 150SN/A * 3. All advertising materials mentioning features or use of this software 160SN/A * must display the following acknowledgement: 170SN/A * This product includes software developed by Mark Brinicombe 180SN/A * for the NetBSD Project. 190SN/A * 4. The name of the author may not be used to endorse or promote products 200SN/A * derived from this software without specific prior written permission 210SN/A * 220SN/A * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 230SN/A * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 240SN/A * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25157SN/A * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26157SN/A * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27157SN/A * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 280SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 290SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 300SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 310SN/A * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 320SN/A */ 330SN/A 340SN/A#include <sys/cdefs.h> 350SN/A__FBSDID("$FreeBSD$"); 36662Savstepan 370SN/A#include <sys/types.h> 380SN/A#include <machine/float.h> 390SN/A 400SN/A#ifndef _SOFT_FLOAT 41static const int map[] = { 42 1, /* round to nearest */ 43 0, /* round to zero */ 44 2, /* round to positive infinity */ 45 3 /* round to negative infinity */ 46}; 47 48int 49__flt_rounds() 50{ 51 uint64_t fpscr; 52 53 __asm__ __volatile("mffs %0" : "=f"(fpscr)); 54 return map[(fpscr & 0x03)]; 55} 56#endif 57