mirror of
https://github.com/urbit/shrub.git
synced 2024-12-18 15:55:00 +03:00
71 lines
2.6 KiB
C
71 lines
2.6 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"
|
||
|
|
|
||
|
|
bool f128_eq( float128_t a, float128_t b )
|
||
|
|
{
|
||
|
|
union ui128_f128 uA;
|
||
|
|
uint_fast64_t uiA64, uiA0;
|
||
|
|
union ui128_f128 uB;
|
||
|
|
uint_fast64_t uiB64, uiB0;
|
||
|
|
|
||
|
|
uA.f = a;
|
||
|
|
uiA64 = uA.ui.v64;
|
||
|
|
uiA0 = uA.ui.v0;
|
||
|
|
uB.f = b;
|
||
|
|
uiB64 = uB.ui.v64;
|
||
|
|
uiB0 = uB.ui.v0;
|
||
|
|
if ( isNaNF128UI( uiA64, uiA0 ) || isNaNF128UI( uiB64, uiB0 ) ) {
|
||
|
|
if (
|
||
|
|
softfloat_isSigNaNF128UI( uiA64, uiA0 )
|
||
|
|
|| softfloat_isSigNaNF128UI( uiB64, uiB0 )
|
||
|
|
) {
|
||
|
|
softfloat_raiseFlags( softfloat_flag_invalid );
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
return
|
||
|
|
(uiA0 == uiB0)
|
||
|
|
&& ( (uiA64 == uiB64)
|
||
|
|
|| (! uiA0 && ! ((uiA64 | uiB64) & UINT64_C( 0x7FFFFFFFFFFFFFFF )))
|
||
|
|
);
|
||
|
|
|
||
|
|
}
|
||
|
|
|