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, 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"
|
|
|
|
|
|
|
|
|
|
/*----------------------------------------------------------------------------
|
|
|
|
|
| Interpreting `uiA' and `uiB' as the bit patterns of two 16-bit floating-
|
|
|
|
|
| point values, at least one of which is a NaN, returns the bit pattern of
|
|
|
|
|
| the combined NaN result. If either `uiA' or `uiB' has the pattern of a
|
|
|
|
|
| signaling NaN, the invalid exception is raised.
|
|
|
|
|
*----------------------------------------------------------------------------*/
|
|
|
|
|
uint_fast16_t
|
|
|
|
|
softfloat_propagateNaNF16UI( uint_fast16_t uiA, uint_fast16_t uiB )
|
|
|
|
|
{
|
|
|
|
|
bool isSigNaNA;
|
|
|
|
|
|
|
|
|
|
isSigNaNA = softfloat_isSigNaNF16UI( uiA );
|
|
|
|
|
if ( isSigNaNA || softfloat_isSigNaNF16UI( uiB ) ) {
|
|
|
|
|
softfloat_raiseFlags( softfloat_flag_invalid );
|
|
|
|
|
if ( isSigNaNA ) return uiA | 0x0200;
|
|
|
|
|
}
|
|
|
|
|
return (isNaNF16UI( uiA ) ? uiA : uiB) | 0x0200;
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
