source/s_shortShiftLeftM.c

/*============================================================================

This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
Package, Release 3, by John R. Hauser.

Copyright 2011, 2012, 2013, 2014 The Regents of the University of California
(Regents).  All Rights Reserved.  Redistribution and use in source and binary
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conditions are met:

Redistributions of source code must retain the above copyright notice,
this list of conditions, and the following two paragraphs of disclaimer.
Redistributions in binary form must reproduce the above copyright notice,
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the name of the Regents nor the names of its contributors may be used to
endorse or promote products derived from this software without specific prior
written permission.

IN NO EVENT SHALL REGENTS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
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TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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=============================================================================*/

#include <stdint.h>
#include "platform.h"
#include "primitives.h"

#ifndef softfloat_shortShiftLeftM

void
 softfloat_shortShiftLeftM(
     uint_fast8_t size_words,
     const uint32_t *aPtr,
     uint_fast8_t count,
     uint32_t *zPtr
 )
{
    uint_fast8_t negCount;
    unsigned int index, lastIndex;
    uint32_t partWordZ, wordA;

    negCount = -count;
    index = indexWordHi( size_words );
    lastIndex = indexWordLo( size_words );
    partWordZ = aPtr[index]<<count;
    while ( index != lastIndex ) {
        wordA = aPtr[index - wordIncr];
        zPtr[index] = partWordZ | wordA>>(negCount & 31);
        index -= wordIncr;
        partWordZ = wordA<<count;
    }
    zPtr[index] = partWordZ;

}

#endif