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/*
* Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "inner.h"
/* see inner.h */
void
br_i32_mulacc(uint32_t *d, const uint32_t *a, const uint32_t *b)
{
size_t alen, blen, u;
alen = (a[0] + 31) >> 5;
blen = (b[0] + 31) >> 5;
d[0] = a[0] + b[0];
for (u = 0; u < blen; u ++) {
uint32_t f;
size_t v;
#if BR_64
uint64_t cc;
#else
uint32_t cc;
#endif
f = b[1 + u];
cc = 0;
for (v = 0; v < alen; v ++) {
uint64_t z;
z = (uint64_t)d[1 + u + v] + MUL(f, a[1 + v]) + cc;
cc = z >> 32;
d[1 + u + v] = (uint32_t)z;
}
d[1 + u + alen] = (uint32_t)cc;
}
}
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