mirror of
https://github.com/ilyakooo0/urbit.git
synced 2024-12-20 05:11:46 +03:00
98 lines
3.5 KiB
C
98 lines
3.5 KiB
C
|
|
/*============================================================================
|
|
|
|
This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
|
|
Package, Release 3, by John R. Hauser.
|
|
|
|
Copyright 2011, 2012, 2013, 2014 The Regents of the University of California
|
|
(Regents). All Rights Reserved. Redistribution and use in source and binary
|
|
forms, with or without modification, are permitted provided that the following
|
|
conditions are met:
|
|
|
|
Redistributions of source code must retain the above copyright notice,
|
|
this list of conditions, and the following two paragraphs of disclaimer.
|
|
Redistributions in binary form must reproduce the above copyright notice,
|
|
this list of conditions, and the following two paragraphs of disclaimer in the
|
|
documentation and/or other materials provided with the distribution. Neither
|
|
the name of the Regents nor the names of its contributors may be used to
|
|
endorse or promote products derived from this software without specific prior
|
|
written permission.
|
|
|
|
IN NO EVENT SHALL REGENTS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
|
|
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING
|
|
OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF REGENTS HAS
|
|
BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
REGENTS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
PURPOSE. THE SOFTWARE AND ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED
|
|
HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION TO PROVIDE
|
|
MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
|
|
|
|
=============================================================================*/
|
|
|
|
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
#include "platform.h"
|
|
#include "internals.h"
|
|
#include "specialize.h"
|
|
#include "softfloat.h"
|
|
|
|
#ifdef SOFTFLOAT_FAST_INT64
|
|
|
|
bool f128M_eq( const float128_t *aPtr, const float128_t *bPtr )
|
|
{
|
|
|
|
return f128_eq( *aPtr, *bPtr );
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
bool f128M_eq( const float128_t *aPtr, const float128_t *bPtr )
|
|
{
|
|
const uint32_t *aWPtr, *bWPtr;
|
|
uint32_t wordA, wordB, uiA96, uiB96;
|
|
bool possibleOppositeZeros;
|
|
uint32_t mashWord;
|
|
|
|
aWPtr = (const uint32_t *) aPtr;
|
|
bWPtr = (const uint32_t *) bPtr;
|
|
wordA = aWPtr[indexWord( 4, 2 )];
|
|
wordB = bWPtr[indexWord( 4, 2 )];
|
|
if ( wordA != wordB ) goto false_checkSigNaNs;
|
|
uiA96 = aWPtr[indexWordHi( 4 )];
|
|
uiB96 = bWPtr[indexWordHi( 4 )];
|
|
possibleOppositeZeros = false;
|
|
if ( uiA96 != uiB96 ) {
|
|
possibleOppositeZeros = (((uiA96 | uiB96) & 0x7FFFFFFF) == 0);
|
|
if ( ! possibleOppositeZeros ) goto false_checkSigNaNs;
|
|
}
|
|
mashWord = wordA | wordB;
|
|
wordA = aWPtr[indexWord( 4, 1 )];
|
|
wordB = bWPtr[indexWord( 4, 1 )];
|
|
if ( wordA != wordB ) goto false_checkSigNaNs;
|
|
mashWord |= wordA | wordB;
|
|
wordA = aWPtr[indexWord( 4, 0 )];
|
|
wordB = bWPtr[indexWord( 4, 0 )];
|
|
if ( wordA != wordB ) goto false_checkSigNaNs;
|
|
if ( possibleOppositeZeros && ((mashWord | wordA | wordB) != 0) ) {
|
|
goto false_checkSigNaNs;
|
|
}
|
|
if ( ! softfloat_isNaNF128M( aWPtr ) && ! softfloat_isNaNF128M( bWPtr ) ) {
|
|
return true;
|
|
}
|
|
false_checkSigNaNs:
|
|
if (
|
|
f128M_isSignalingNaN( (const float128_t *) aWPtr )
|
|
|| f128M_isSignalingNaN( (const float128_t *) bWPtr )
|
|
) {
|
|
softfloat_raiseFlags( softfloat_flag_invalid );
|
|
}
|
|
return false;
|
|
|
|
}
|
|
|
|
#endif
|
|
|