4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/* $NetBSD: flt_rounds.c,v 1.3 2006/02/25 00:58:35 wiz Exp $ */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Copyright (c) 1996 Mark Brinicombe
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * All rights reserved.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Redistribution and use in source and binary forms, with or without
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * modification, are permitted provided that the following conditions
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 1. Redistributions of source code must retain the above copyright
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * notice, this list of conditions and the following disclaimer.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 2. Redistributions in binary form must reproduce the above copyright
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * notice, this list of conditions and the following disclaimer in the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * documentation and/or other materials provided with the distribution.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 3. All advertising materials mentioning features or use of this software
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * must display the following acknowledgement:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * This product includes software developed by Mark Brinicombe
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * for the NetBSD Project.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 4. The name of the author may not be used to endorse or promote products
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * derived from this software without specific prior written permission
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync__RCSID("$NetBSD: flt_rounds.c,v 1.3 2006/02/25 00:58:35 wiz Exp $");
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif /* LIBC_SCCS and not lint */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync 0 /* round to zero */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Return the current FP rounding mode
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 0 - round to zero
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 1 - round to nearest
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 2 - round to postive infinity
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 3 - round to negative infinity
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * ok all we need to do is get the current FP rounding mode
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * index our map table and return the appropriate value.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * The ARM FPA codes the rounding mode into the actual FP instructions
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * so there is no such thing as a global rounding mode.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * The default is round to nearest if rounding is not explicitly specified.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * FP instructions generated by GCC will not explicitly specify a rounding
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * So the best we can do it to return the rounding mode FP instructions
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * use if rounding is not specified which is round to nearest.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * This could change in the future with new floating point emulators or
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * soft float FP libraries.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync //return(map[fpgetround()]);