source/ARM-VFPv2-defaultNaN/s_propagateNaNF128M.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, 2015, 2017 The Regents of the University of
California.  All rights reserved.

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 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
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 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
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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=============================================================================*/

#include <stdint.h>
#include "platform.h"
#include "primitiveTypes.h"
#include "specialize.h"
#include "softfloat.h"

/*----------------------------------------------------------------------------
| Assuming at least one of the two 128-bit floating-point values pointed to by
| 'aWPtr' and 'bWPtr' is a NaN, stores the combined NaN result at the location
| pointed to by 'zWPtr'.  If either original floating-point value is a
| signaling NaN, the invalid exception is raised.  Each of 'aWPtr', 'bWPtr',
| and 'zWPtr' points to an array of four 32-bit elements that concatenate in
| the platform's normal endian order to form a 128-bit floating-point value.
*----------------------------------------------------------------------------*/
void
 softfloat_propagateNaNF128M(
     const uint32_t *aWPtr, const uint32_t *bWPtr, uint32_t *zWPtr )
{

    if (
        f128M_isSignalingNaN( (const float128_t *) aWPtr )
            || (bWPtr && f128M_isSignalingNaN( (const float128_t *) bWPtr ))
    ) {
        softfloat_raiseFlags( softfloat_flag_invalid );
    }
    zWPtr[indexWord( 4, 3 )] = defaultNaNF128UI96;
    zWPtr[indexWord( 4, 2 )] = defaultNaNF128UI64;
    zWPtr[indexWord( 4, 1 )] = defaultNaNF128UI32;
    zWPtr[indexWord( 4, 0 )] = defaultNaNF128UI0;

}