2024-07-29 15:33:50 +02:00
|
|
|
|
|
|
|
|
/*============================================================================
|
|
|
|
|
|
|
|
|
|
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 "softfloat.h"
|
|
|
|
|
|
|
|
|
|
float64_t i64_to_f64( int64_t a )
|
|
|
|
|
{
|
|
|
|
|
bool sign;
|
|
|
|
|
union ui64_f64 uZ;
|
|
|
|
|
uint_fast64_t absA;
|
|
|
|
|
|
|
|
|
|
sign = (a < 0);
|
|
|
|
|
if ( ! (a & UINT64_C( 0x7FFFFFFFFFFFFFFF )) ) {
|
|
|
|
|
uZ.ui = sign ? packToF64UI( 1, 0x43E, 0 ) : 0;
|
|
|
|
|
return uZ.f;
|
|
|
|
|
}
|
|
|
|
|
absA = sign ? -(uint_fast64_t) a : (uint_fast64_t) a;
|
|
|
|
|
return softfloat_normRoundPackToF64( sign, 0x43C, absA );
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
