diff options
Diffstat (limited to 'softfloat/s_shiftLeftM.c')
-rw-r--r-- | softfloat/s_shiftLeftM.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/softfloat/s_shiftLeftM.c b/softfloat/s_shiftLeftM.c new file mode 100644 index 0000000..feafc67 --- /dev/null +++ b/softfloat/s_shiftLeftM.c @@ -0,0 +1,91 @@ + +/*============================================================================ + +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 + |