mirror of
https://github.com/urbit/shrub.git
synced 2024-12-18 15:55:00 +03:00
79 lines
2.6 KiB
C
79 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 <stdint.h>
|
|
#include "platform.h"
|
|
#include "internals.h"
|
|
#include "softfloat.h"
|
|
|
|
#ifdef SOFTFLOAT_FAST_INT64
|
|
|
|
void i32_to_f128M( int32_t a, float128_t *zPtr )
|
|
{
|
|
|
|
*zPtr = i32_to_f128( a );
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
void i32_to_f128M( int32_t a, float128_t *zPtr )
|
|
{
|
|
uint32_t *zWPtr;
|
|
uint32_t uiZ96, uiZ64;
|
|
bool sign;
|
|
uint32_t absA;
|
|
int_fast8_t shiftCount;
|
|
uint64_t normAbsA;
|
|
|
|
zWPtr = (uint32_t *) zPtr;
|
|
uiZ96 = 0;
|
|
uiZ64 = 0;
|
|
if ( a ) {
|
|
sign = (a < 0);
|
|
absA = sign ? -(uint32_t) a : (uint32_t) a;
|
|
shiftCount = softfloat_countLeadingZeros32( absA ) + 17;
|
|
normAbsA = (uint64_t) absA<<shiftCount;
|
|
uiZ96 = packToF128UI96( sign, 0x402E - shiftCount, normAbsA>>32 );
|
|
uiZ64 = normAbsA;
|
|
}
|
|
zWPtr[indexWord( 4, 3 )] = uiZ96;
|
|
zWPtr[indexWord( 4, 2 )] = uiZ64;
|
|
zWPtr[indexWord( 4, 1 )] = 0;
|
|
zWPtr[indexWord( 4, 0 )] = 0;
|
|
|
|
}
|
|
|
|
#endif
|
|
|