mirror of
https://github.com/openhwgroup/cvw
synced 2025-02-11 06:05:49 +00:00
126 lines
4.7 KiB
C
126 lines
4.7 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 "specialize.h"
|
|
#include "softfloat.h"
|
|
|
|
#ifdef SOFTFLOAT_FAST_INT64
|
|
|
|
void extF80M_to_f128M( const extFloat80_t *aPtr, float128_t *zPtr )
|
|
{
|
|
|
|
*zPtr = extF80_to_f128( *aPtr );
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
void extF80M_to_f128M( const extFloat80_t *aPtr, float128_t *zPtr )
|
|
{
|
|
const struct extFloat80M *aSPtr;
|
|
uint32_t *zWPtr;
|
|
uint_fast16_t uiA64;
|
|
bool sign;
|
|
int32_t exp;
|
|
uint64_t sig;
|
|
struct commonNaN commonNaN;
|
|
uint32_t uiZ96;
|
|
|
|
/*------------------------------------------------------------------------
|
|
*------------------------------------------------------------------------*/
|
|
aSPtr = (const struct extFloat80M *) aPtr;
|
|
zWPtr = (uint32_t *) zPtr;
|
|
/*------------------------------------------------------------------------
|
|
*------------------------------------------------------------------------*/
|
|
uiA64 = aSPtr->signExp;
|
|
sign = signExtF80UI64( uiA64 );
|
|
exp = expExtF80UI64( uiA64 );
|
|
sig = aSPtr->signif;
|
|
/*------------------------------------------------------------------------
|
|
*------------------------------------------------------------------------*/
|
|
zWPtr[indexWord( 4, 0 )] = 0;
|
|
if ( exp == 0x7FFF ) {
|
|
if ( sig & UINT64_C( 0x7FFFFFFFFFFFFFFF ) ) {
|
|
softfloat_extF80MToCommonNaN( aSPtr, &commonNaN );
|
|
softfloat_commonNaNToF128M( &commonNaN, zWPtr );
|
|
return;
|
|
}
|
|
uiZ96 = packToF128UI96( sign, 0x7FFF, 0 );
|
|
goto uiZ;
|
|
}
|
|
/*------------------------------------------------------------------------
|
|
*------------------------------------------------------------------------*/
|
|
if ( exp ) --exp;
|
|
if ( ! (sig & UINT64_C( 0x8000000000000000 )) ) {
|
|
if ( ! sig ) {
|
|
uiZ96 = packToF128UI96( sign, 0, 0 );
|
|
goto uiZ;
|
|
}
|
|
exp += softfloat_normExtF80SigM( &sig );
|
|
}
|
|
/*------------------------------------------------------------------------
|
|
*------------------------------------------------------------------------*/
|
|
zWPtr[indexWord( 4, 1 )] = (uint32_t) sig<<17;
|
|
sig >>= 15;
|
|
zWPtr[indexWord( 4, 2 )] = sig;
|
|
if ( exp < 0 ) {
|
|
zWPtr[indexWordHi( 4 )] = sig>>32;
|
|
softfloat_shiftRight96M(
|
|
&zWPtr[indexMultiwordHi( 4, 3 )],
|
|
-exp,
|
|
&zWPtr[indexMultiwordHi( 4, 3 )]
|
|
);
|
|
exp = 0;
|
|
sig = (uint64_t) zWPtr[indexWordHi( 4 )]<<32;
|
|
}
|
|
zWPtr[indexWordHi( 4 )] = packToF128UI96( sign, exp, sig>>32 );
|
|
return;
|
|
/*------------------------------------------------------------------------
|
|
*------------------------------------------------------------------------*/
|
|
uiZ:
|
|
zWPtr[indexWord( 4, 3 )] = uiZ96;
|
|
zWPtr[indexWord( 4, 2 )] = 0;
|
|
zWPtr[indexWord( 4, 1 )] = 0;
|
|
|
|
}
|
|
|
|
#endif
|
|
|