mirror of
https://github.com/urbit/shrub.git
synced 2024-12-23 19:05:48 +03:00
71 lines
2.7 KiB
C
71 lines
2.7 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 extF80_le( extFloat80_t a, extFloat80_t b )
|
|
{
|
|
union { struct extFloat80M s; extFloat80_t f; } uA;
|
|
uint_fast16_t uiA64;
|
|
uint_fast64_t uiA0;
|
|
union { struct extFloat80M s; extFloat80_t f; } uB;
|
|
uint_fast16_t uiB64;
|
|
uint_fast64_t uiB0;
|
|
bool signA, signB;
|
|
|
|
uA.f = a;
|
|
uiA64 = uA.s.signExp;
|
|
uiA0 = uA.s.signif;
|
|
uB.f = b;
|
|
uiB64 = uB.s.signExp;
|
|
uiB0 = uB.s.signif;
|
|
if ( isNaNExtF80UI( uiA64, uiA0 ) || isNaNExtF80UI( uiB64, uiB0 ) ) {
|
|
softfloat_raiseFlags( softfloat_flag_invalid );
|
|
return false;
|
|
}
|
|
signA = signExtF80UI64( uiA64 );
|
|
signB = signExtF80UI64( uiB64 );
|
|
return
|
|
(signA != signB)
|
|
? signA || ! (((uiA64 | uiB64) & 0x7FFF) | uiA0 | uiB0)
|
|
: ((uiA64 == uiB64) && (uiA0 == uiB0))
|
|
|| (signA ^ softfloat_lt128( uiA64, uiA0, uiB64, uiB0 ));
|
|
|
|
}
|
|
|