101 lines
3.6 KiB
C
101 lines
3.6 KiB
C
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/*============================================================================
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This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
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Package, Release 3e, by John R. Hauser.
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Copyright 2011, 2012, 2013, 2014 The Regents of the University of California.
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All rights reserved.
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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 are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions, and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions, and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the University nor the names of its contributors may
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be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
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DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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=============================================================================*/
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#include <stdbool.h>
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#include <stdint.h>
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#include "platform.h"
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#include "internals.h"
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#include "specialize.h"
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#include "softfloat.h"
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#ifdef SOFTFLOAT_FAST_INT64
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bool f128M_eq( const float128_t *aPtr, const float128_t *bPtr )
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{
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return f128_eq( *aPtr, *bPtr );
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}
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#else
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bool f128M_eq( const float128_t *aPtr, const float128_t *bPtr )
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{
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const uint32_t *aWPtr, *bWPtr;
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uint32_t wordA, wordB, uiA96, uiB96;
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bool possibleOppositeZeros;
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uint32_t mashWord;
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aWPtr = (const uint32_t *) aPtr;
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bWPtr = (const uint32_t *) bPtr;
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wordA = aWPtr[indexWord( 4, 2 )];
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wordB = bWPtr[indexWord( 4, 2 )];
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if ( wordA != wordB ) goto false_checkSigNaNs;
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uiA96 = aWPtr[indexWordHi( 4 )];
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uiB96 = bWPtr[indexWordHi( 4 )];
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possibleOppositeZeros = false;
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if ( uiA96 != uiB96 ) {
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possibleOppositeZeros = (((uiA96 | uiB96) & 0x7FFFFFFF) == 0);
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if ( ! possibleOppositeZeros ) goto false_checkSigNaNs;
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}
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mashWord = wordA | wordB;
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wordA = aWPtr[indexWord( 4, 1 )];
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wordB = bWPtr[indexWord( 4, 1 )];
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if ( wordA != wordB ) goto false_checkSigNaNs;
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mashWord |= wordA | wordB;
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wordA = aWPtr[indexWord( 4, 0 )];
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wordB = bWPtr[indexWord( 4, 0 )];
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if ( wordA != wordB ) goto false_checkSigNaNs;
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if ( possibleOppositeZeros && ((mashWord | wordA | wordB) != 0) ) {
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goto false_checkSigNaNs;
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}
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if ( ! softfloat_isNaNF128M( aWPtr ) && ! softfloat_isNaNF128M( bWPtr ) ) {
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return true;
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}
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false_checkSigNaNs:
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if (
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f128M_isSignalingNaN( (const float128_t *) aWPtr )
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|| f128M_isSignalingNaN( (const float128_t *) bWPtr )
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) {
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softfloat_raiseFlags( softfloat_flag_invalid );
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}
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return false;
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}
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#endif
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