275 lines
7.1 KiB
C
275 lines
7.1 KiB
C
/* $NetBSD: fplib_glue.c,v 1.2 2000/02/22 01:18:28 mycroft 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 "milieu.h"
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#include "softfloat.h"
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int __eqsf2(float32 a,float32 b);
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int __eqdf2(float64 a,float64 b);
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int __nesf2(float32 a,float32 b);
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int __nedf2(float64 a,float64 b);
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int __gtsf2(float32 a,float32 b);
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int __gtdf2(float64 a,float64 b);
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int __gesf2(float32 a,float32 b);
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int __gedf2(float64 a,float64 b);
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int __ltsf2(float32 a,float32 b);
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int __ltdf2(float64 a,float64 b);
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int __lesf2(float32 a,float32 b);
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int __ledf2(float64 a,float64 b);
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float32 __negsf2(float32 a);
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float64 __negdf2(float64 a);
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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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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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a.high ^= 0x80000000;
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return a;
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}
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/*
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* 32-bit operations. This is not BSD code.
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*/
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float32 __addsf3(float32 a, float32 b);
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float32 __addsf3(float32 a, float32 b)
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{
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return float32_add(a, b);
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}
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float32 __subsf3(float32 a, float32 b);
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float32 __subsf3(float32 a, float32 b)
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{
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return float32_sub(a, b);
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}
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float32 __mulsf3(float32 a, float32 b);
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float32 __mulsf3(float32 a, float32 b)
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{
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return float32_mul(a, b);
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}
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float32 __divsf3(float32 a, float32 b);
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float32 __divsf3(float32 a, float32 b)
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{
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return float32_div(a, b);
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}
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float32 __floatsisf(int32 x);
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float32 __floatsisf(int32 x)
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{
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return int32_to_float32(x);
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}
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float32 __floatunsisf(int32 x);
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float32 __floatunsisf(int32 x)
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{
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return int32_to_float32(x); // XXX
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}
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int32 __fixsfsi(float32 x);
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int32 __fixsfsi(float32 x)
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{
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return float32_to_int32_round_to_zero(x);
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}
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uint32 __fixunssfsi(float32 x);
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uint32 __fixunssfsi(float32 x)
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{
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return float32_to_int32_round_to_zero(x); // XXX
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}
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flag __unordsf2(float32 a, float32 b);
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flag __unordsf2(float32 a, float32 b)
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{
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/*
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* The comparison is unordered if either input is a NaN.
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* Test for this by comparing each operand with itself.
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* We must perform both comparisons to correctly check for
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* signalling NaNs.
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*/
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return 1 ^ (float32_eq(a, a) & float32_eq(b, b));
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}
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/*
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* 64-bit operations. This is not BSD code.
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*/
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float64 __adddf3(float64 a, float64 b);
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float64 __adddf3(float64 a, float64 b)
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{
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return float64_add(a, b);
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}
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float64 __subdf3(float64 a, float64 b);
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float64 __subdf3(float64 a, float64 b)
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{
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return float64_sub(a, b);
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}
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float64 __muldf3(float64 a, float64 b);
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float64 __muldf3(float64 a, float64 b)
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{
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return float64_mul(a, b);
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}
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float64 __divdf3(float64 a, float64 b);
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float64 __divdf3(float64 a, float64 b)
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{
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return float64_div(a, b);
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}
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float64 __floatsidf(int32 x);
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float64 __floatsidf(int32 x)
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{
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return int32_to_float64(x);
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}
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float64 __floatunsidf(int32 x);
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float64 __floatunsidf(int32 x)
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{
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return int32_to_float64(x); // XXX
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}
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int32 __fixdfsi(float64 x);
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int32 __fixdfsi(float64 x)
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{
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return float64_to_int32_round_to_zero(x);
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}
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uint32 __fixunsdfsi(float64 x);
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uint32 __fixunsdfsi(float64 x)
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{
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return float64_to_int32_round_to_zero(x); // XXX
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}
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flag __unorddf2(float64 a, float64 b);
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flag __unorddf2(float64 a, float64 b)
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{
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/*
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* The comparison is unordered if either input is a NaN.
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* Test for this by comparing each operand with itself.
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* We must perform both comparisons to correctly check for
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* signalling NaNs.
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*/
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return 1 ^ (float64_eq(a, a) & float64_eq(b, b));
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}
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