92 lines
3.1 KiB
C
92 lines
3.1 KiB
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, 2016 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 <stdint.h>
|
|
#include "platform.h"
|
|
|
|
#ifndef softfloat_shiftLeftM
|
|
|
|
#define softfloat_shiftLeftM softfloat_shiftLeftM
|
|
#include "primitives.h"
|
|
|
|
void
|
|
softfloat_shiftLeftM(
|
|
uint_fast8_t size_words,
|
|
const uint32_t *aPtr,
|
|
uint32_t dist,
|
|
uint32_t *zPtr
|
|
)
|
|
{
|
|
uint32_t wordDist;
|
|
uint_fast8_t innerDist;
|
|
uint32_t *destPtr;
|
|
uint_fast8_t i;
|
|
|
|
wordDist = dist>>5;
|
|
if ( wordDist < size_words ) {
|
|
aPtr += indexMultiwordLoBut( size_words, wordDist );
|
|
innerDist = dist & 31;
|
|
if ( innerDist ) {
|
|
softfloat_shortShiftLeftM(
|
|
size_words - wordDist,
|
|
aPtr,
|
|
innerDist,
|
|
zPtr + indexMultiwordHiBut( size_words, wordDist )
|
|
);
|
|
if ( ! wordDist ) return;
|
|
} else {
|
|
aPtr += indexWordHi( size_words - wordDist );
|
|
destPtr = zPtr + indexWordHi( size_words );
|
|
for ( i = size_words - wordDist; i; --i ) {
|
|
*destPtr = *aPtr;
|
|
aPtr -= wordIncr;
|
|
destPtr -= wordIncr;
|
|
}
|
|
}
|
|
zPtr += indexMultiwordLo( size_words, wordDist );
|
|
} else {
|
|
wordDist = size_words;
|
|
}
|
|
do {
|
|
*zPtr++ = 0;
|
|
--wordDist;
|
|
} while ( wordDist );
|
|
|
|
}
|
|
|
|
#endif
|
|
|