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/*
* Copyright (c) 2014, STMicroelectronics International N.V.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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 "mpa.h"
/*------------------------------------------------------------
*
* mpa_set_S32
*
*/
void mpa_set_S32(mpanum dest, int32_t short_val)
{
#if (MPA_WORD_SIZE == 32)
if (short_val != 0)
dest->size = (short_val < 0) ? -1 : 1;
else
dest->size = 0;
dest->d[0] = (short_val < 0) ? -short_val : short_val;
#else
#error "Write code for digit size != 32"
#endif
}
/*------------------------------------------------------------
*
* mpa_get_S32
*
* Returns zero if the src fits within an int32_t
* otherwise it returns non-zero and the dest value is undefined.
*/
int32_t mpa_get_S32(int32_t *dest, mpanum src)
{
#if (MPA_WORD_SIZE == 32)
if (__mpanum_size(src) > 1)
return -1;
if (__mpanum_lsw(src) > INT32_MIN && __mpanum_sign(src) == MPA_NEG_SIGN)
return -1;
if (__mpanum_lsw(src) > INT32_MAX && __mpanum_sign(src) == MPA_POS_SIGN)
return -1;
*dest = __mpanum_get_word(0, src) * __mpanum_sign(src);
return 0;
#else
#error "Write code for digit size != 32"
#endif
}
/*------------------------------------------------------------
*
* mpa_set_word
*
*/
void mpa_set_word(mpanum dest, mpa_word_t src)
{
dest->d[0] = src;
dest->size = (src == 0) ? 0 : 1;
}
/*------------------------------------------------------------
*
* mpa_get_word
*
* Returns the absolute value of the least significant word of src
*/
mpa_word_t mpa_get_word(mpanum src)
{
return __mpanum_get_word(0, src);
}
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