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60 lines
2.7 KiB
C
60 lines
2.7 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 3, by John R. Hauser.
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Copyright 2011, 2012, 2013, 2014 The Regents of the University of California
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(Regents). All Rights Reserved. Redistribution and use in source and binary
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forms, with or without modification, are permitted provided that the following
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conditions are met:
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Redistributions of source code must retain the above copyright notice,
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this list of conditions, and the following two paragraphs of disclaimer.
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Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions, and the following two paragraphs of disclaimer in the
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documentation and/or other materials provided with the distribution. Neither
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the name of the Regents nor the names of its contributors may be used to
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endorse or promote products derived from this software without specific prior
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written permission.
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IN NO EVENT SHALL REGENTS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
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SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING
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OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF REGENTS HAS
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BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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REGENTS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED
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TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE. THE SOFTWARE AND ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED
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HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION TO PROVIDE
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MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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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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