mirror of
https://github.com/ilyakooo0/urbit.git
synced 2024-12-20 21:31:32 +03:00
116 lines
4.1 KiB
C
116 lines
4.1 KiB
C
|
|
/*============================================================================
|
|
|
|
This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
|
|
Package, Release 3c, by John R. Hauser.
|
|
|
|
Copyright 2011, 2012, 2013, 2014, 2015 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 f32_to_f128M( float32_t a, float128_t *zPtr )
|
|
{
|
|
|
|
*zPtr = f32_to_f128( a );
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
void f32_to_f128M( float32_t a, float128_t *zPtr )
|
|
{
|
|
uint32_t *zWPtr;
|
|
union ui32_f32 uA;
|
|
uint32_t uiA;
|
|
bool sign;
|
|
int_fast16_t exp;
|
|
uint32_t frac, uiZ64;
|
|
struct commonNaN commonNaN;
|
|
uint32_t uiZ96;
|
|
struct exp16_sig32 normExpSig;
|
|
uint64_t frac64;
|
|
|
|
/*------------------------------------------------------------------------
|
|
*------------------------------------------------------------------------*/
|
|
zWPtr = (uint32_t *) zPtr;
|
|
/*------------------------------------------------------------------------
|
|
*------------------------------------------------------------------------*/
|
|
uA.f = a;
|
|
uiA = uA.ui;
|
|
sign = signF32UI( uiA );
|
|
exp = expF32UI( uiA );
|
|
frac = fracF32UI( uiA );
|
|
/*------------------------------------------------------------------------
|
|
*------------------------------------------------------------------------*/
|
|
uiZ64 = 0;
|
|
if ( exp == 0xFF ) {
|
|
if ( frac ) {
|
|
softfloat_f32UIToCommonNaN( uiA, &commonNaN );
|
|
softfloat_commonNaNToF128M( &commonNaN, zWPtr );
|
|
return;
|
|
}
|
|
uiZ96 = packToF128UI96( sign, 0x7FFF, 0 );
|
|
goto uiZ;
|
|
}
|
|
/*------------------------------------------------------------------------
|
|
*------------------------------------------------------------------------*/
|
|
if ( ! exp ) {
|
|
if ( ! frac ) {
|
|
uiZ96 = packToF128UI96( sign, 0, 0 );
|
|
goto uiZ;
|
|
}
|
|
normExpSig = softfloat_normSubnormalF32Sig( frac );
|
|
exp = normExpSig.exp - 1;
|
|
frac = normExpSig.sig;
|
|
}
|
|
/*------------------------------------------------------------------------
|
|
*------------------------------------------------------------------------*/
|
|
frac64 = (uint64_t) frac<<25;
|
|
uiZ96 = packToF128UI96( sign, exp + 0x3F80, frac64>>32 );
|
|
uiZ64 = frac64;
|
|
uiZ:
|
|
zWPtr[indexWord( 4, 3 )] = uiZ96;
|
|
zWPtr[indexWord( 4, 2 )] = uiZ64;
|
|
zWPtr[indexWord( 4, 1 )] = 0;
|
|
zWPtr[indexWord( 4, 0 )] = 0;
|
|
|
|
}
|
|
|
|
#endif
|
|
|