134 lines
4.2 KiB
C
134 lines
4.2 KiB
C
/* $NetBSD: fplib_glue.c,v 1.1.1.1 1999/09/16 12:18:25 takemura Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Neil A. Carson and Mark Brinicombe
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "environment.h"
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#include "softfloat.h"
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/********************************* COMPARISONS ********************************/
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/*
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* 'Equal' wrapper. This returns 0 if the numbers are equal, or (1 | -1)
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* otherwise. So we need to invert the output.
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*/
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int __eqsf2(float32 a,float32 b) {
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return float32_eq(a,b)?0:1;
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}
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int __eqdf2(float64 a,float64 b) {
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return float64_eq(a,b)?0:1;
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}
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/*
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* 'Not Equal' wrapper. This returns -1 or 1 (say, 1!) if the numbers are
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* not equal, 0 otherwise. However no not equal call is provided, so we have
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* to use an 'equal' call and invert the result. The result is already
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* inverted though! Confusing?!
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*/
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int __nesf2(float32 a,float32 b) {
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return float32_eq(a,b)?0:-1;
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}
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int __nedf2(float64 a,float64 b) {
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return float64_eq(a,b)?0:-1;
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}
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/*
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* 'Greater Than' wrapper. This returns 1 if the number is greater, 0
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* or -1 otherwise. Unfortunately, no such function exists. We have to
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* instead compare the numbers using the 'less than' calls in order to
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* make up our mind. This means that we can call 'less than or equal' and
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* invert the result.
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*/
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int __gtsf2(float32 a,float32 b) {
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return float32_le(a,b)?0:1;
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}
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int __gtdf2(float64 a,float64 b) {
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return float64_le(a,b)?0:1;
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}
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/*
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* 'Greater Than or Equal' wrapper. We emulate this by inverting the result
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* of a 'less than' call.
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*/
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int __gesf2(float32 a,float32 b) {
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return float32_lt(a,b)?-1:0;
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}
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int __gedf2(float64 a,float64 b) {
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return float64_lt(a,b)?-1:0;
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}
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/*
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* 'Less Than' wrapper. A 1 from the ARM code needs to be turned into -1.
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*/
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int __ltsf2(float32 a,float32 b) {
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return float32_lt(a,b)?-1:0;
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}
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int __ltdf2(float64 a,float64 b) {
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return float64_lt(a,b)?-1:0;
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}
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/*
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* 'Less Than or Equal' wrapper. A 0 must turn into a 1, and a 1 into a 0.
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*/
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int __lesf2(float32 a,float32 b) {
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return float32_le(a,b)?0:1;
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}
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int __ledf2(float64 a,float64 b) {
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return float64_le(a,b)?0:1;
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}
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/*
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* Float negate... This isn't provided by the library, but it's hardly the
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* hardest function in the world to write... :) In fact, because of the
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* position in the registers of arguments, the double precision version can
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* go here too ;-)
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*/
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#define SIGN_BIT_TWIDDLE
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float32 __negsf2(float32 a) {
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return (a ^ 0x80000000);
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}
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float64 __negdf2(float64 a) {
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return (a ^ 0x8000000000000000LL);
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}
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