mirror of
https://github.com/ilyakooo0/urbit.git
synced 2024-12-26 00:12:28 +03:00
63 lines
2.4 KiB
C
63 lines
2.4 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 "softfloat.h"
|
||
|
|
|
||
|
|
extFloat80_t i64_to_extF80( int64_t a )
|
||
|
|
{
|
||
|
|
uint_fast16_t uiZ64;
|
||
|
|
uint_fast64_t absA;
|
||
|
|
bool sign;
|
||
|
|
int_fast8_t shiftCount;
|
||
|
|
union { struct extFloat80M s; extFloat80_t f; } uZ;
|
||
|
|
|
||
|
|
uiZ64 = 0;
|
||
|
|
absA = 0;
|
||
|
|
if ( a ) {
|
||
|
|
sign = (a < 0);
|
||
|
|
absA = sign ? -(uint_fast64_t) a : (uint_fast64_t) a;
|
||
|
|
shiftCount = softfloat_countLeadingZeros64( absA );
|
||
|
|
uiZ64 = packToExtF80UI64( sign, 0x403E - shiftCount );
|
||
|
|
absA <<= shiftCount;
|
||
|
|
}
|
||
|
|
uZ.s.signExp = uiZ64;
|
||
|
|
uZ.s.signif = absA;
|
||
|
|
return uZ.f;
|
||
|
|
|
||
|
|
}
|
||
|
|
|