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63 lines
2.8 KiB
C
63 lines
2.8 KiB
C
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/*============================================================================
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This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
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Package, Release 3e, by John R. Hauser.
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Copyright 2011, 2012, 2013, 2014, 2017 The Regents of the University of
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California. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions, and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions, and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the University nor the names of its contributors may
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be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
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DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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=============================================================================*/
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#include <stdint.h>
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#include "platform.h"
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#include "primitives.h"
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#include "specialize.h"
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#include "softfloat.h"
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/*----------------------------------------------------------------------------
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| Assuming the 128-bit floating-point value pointed to by 'aWPtr' is a NaN,
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| converts this NaN to the common NaN form, and stores the resulting common
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| NaN at the location pointed to by 'zPtr'. If the NaN is a signaling NaN,
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| the invalid exception is raised. Argument 'aWPtr' points to an array of
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| four 32-bit elements that concatenate in the platform's normal endian order
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| to form a 128-bit floating-point value.
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*----------------------------------------------------------------------------*/
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void
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softfloat_f128MToCommonNaN( const uint32_t *aWPtr, struct commonNaN *zPtr )
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{
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if ( f128M_isSignalingNaN( (const float128_t *) aWPtr ) ) {
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softfloat_raiseFlags( softfloat_flag_invalid );
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}
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zPtr->sign = aWPtr[indexWordHi( 4 )]>>31;
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softfloat_shortShiftLeft128M( aWPtr, 16, (uint32_t *) &zPtr->v0 );
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}
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