94 lines
3.3 KiB
C
94 lines
3.3 KiB
C
|
|
||
|
|
/*============================================================================
|
||
|
|
|
||
|
|
This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
|
||
|
|
Package, Release 3e, by John R. Hauser.
|
||
|
|
|
||
|
|
Copyright 2011, 2012, 2013, 2014 The Regents of the University of California.
|
||
|
|
All rights reserved.
|
||
|
|
|
||
|
|
Redistribution and use in source and binary forms, with or without
|
||
|
|
modification, are permitted provided that the following conditions are met:
|
||
|
|
|
||
|
|
1. Redistributions of source code must retain the above copyright notice,
|
||
|
|
this list of conditions, and the following disclaimer.
|
||
|
|
|
||
|
|
2. Redistributions in binary form must reproduce the above copyright notice,
|
||
|
|
this list of conditions, and the following disclaimer in the documentation
|
||
|
|
and/or other materials provided with the distribution.
|
||
|
|
|
||
|
|
3. Neither the name of the University nor the names of its contributors may
|
||
|
|
be used to endorse or promote products derived from this software without
|
||
|
|
specific prior written permission.
|
||
|
|
|
||
|
|
THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY
|
||
|
|
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
||
|
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
|
||
|
|
DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
|
||
|
|
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
||
|
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||
|
|
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
||
|
|
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
|
||
|
|
=============================================================================*/
|
||
|
|
|
||
|
|
#include <stdbool.h>
|
||
|
|
#include <stdint.h>
|
||
|
|
#include "platform.h"
|
||
|
|
#include "internals.h"
|
||
|
|
#include "softfloat.h"
|
||
|
|
|
||
|
|
#ifdef SOFTFLOAT_FAST_INT64
|
||
|
|
|
||
|
|
bool f128M_lt( const float128_t *aPtr, const float128_t *bPtr )
|
||
|
|
{
|
||
|
|
|
||
|
|
return f128_lt( *aPtr, *bPtr );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
bool f128M_lt( const float128_t *aPtr, const float128_t *bPtr )
|
||
|
|
{
|
||
|
|
const uint32_t *aWPtr, *bWPtr;
|
||
|
|
uint32_t uiA96, uiB96;
|
||
|
|
bool signA, signB;
|
||
|
|
uint32_t wordA, wordB;
|
||
|
|
|
||
|
|
aWPtr = (const uint32_t *) aPtr;
|
||
|
|
bWPtr = (const uint32_t *) bPtr;
|
||
|
|
if ( softfloat_isNaNF128M( aWPtr ) || softfloat_isNaNF128M( bWPtr ) ) {
|
||
|
|
softfloat_raiseFlags( softfloat_flag_invalid );
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
uiA96 = aWPtr[indexWordHi( 4 )];
|
||
|
|
uiB96 = bWPtr[indexWordHi( 4 )];
|
||
|
|
signA = signF128UI96( uiA96 );
|
||
|
|
signB = signF128UI96( uiB96 );
|
||
|
|
if ( signA != signB ) {
|
||
|
|
if ( signB ) return false;
|
||
|
|
if ( (uiA96 | uiB96) & 0x7FFFFFFF ) return true;
|
||
|
|
wordA = aWPtr[indexWord( 4, 2 )];
|
||
|
|
wordB = bWPtr[indexWord( 4, 2 )];
|
||
|
|
if ( wordA | wordB ) return true;
|
||
|
|
wordA = aWPtr[indexWord( 4, 1 )];
|
||
|
|
wordB = bWPtr[indexWord( 4, 1 )];
|
||
|
|
if ( wordA | wordB ) return true;
|
||
|
|
wordA = aWPtr[indexWord( 4, 0 )];
|
||
|
|
wordB = bWPtr[indexWord( 4, 0 )];
|
||
|
|
return ((wordA | wordB) != 0);
|
||
|
|
}
|
||
|
|
if ( signA ) {
|
||
|
|
aWPtr = (const uint32_t *) bPtr;
|
||
|
|
bWPtr = (const uint32_t *) aPtr;
|
||
|
|
}
|
||
|
|
return (softfloat_compare128M( aWPtr, bWPtr ) < 0);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|