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Diffstat (limited to 'softfloat/s_negXM.c')
-rw-r--r-- | softfloat/s_negXM.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/softfloat/s_negXM.c b/softfloat/s_negXM.c new file mode 100644 index 0000000..bb1c5a1 --- /dev/null +++ b/softfloat/s_negXM.c @@ -0,0 +1,63 @@ + +/*============================================================================ + +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 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" +#include "primitiveTypes.h" + +#ifndef softfloat_negXM + +void softfloat_negXM( uint_fast8_t size_words, uint32_t *zPtr ) +{ + unsigned int index, lastIndex; + uint_fast8_t carry; + uint32_t word; + + index = indexWordLo( size_words ); + lastIndex = indexWordHi( size_words ); + carry = 1; + for (;;) { + word = ~zPtr[index] + carry; + zPtr[index] = word; + if ( index == lastIndex ) break; + index += wordIncr; + if ( word ) carry = 0; + } + +} + +#endif + |