1 /* 2 * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org> 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining 5 * a copy of this software and associated documentation files (the 6 * "Software"), to deal in the Software without restriction, including 7 * without limitation the rights to use, copy, modify, merge, publish, 8 * distribute, sublicense, and/or sell copies of the Software, and to 9 * permit persons to whom the Software is furnished to do so, subject to 10 * the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be 13 * included in all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 22 * SOFTWARE. 23 */ 24 25 #include "inner.h" 26 27 /* see inner.h */ 28 void 29 br_i32_mulacc(uint32_t *d, const uint32_t *a, const uint32_t *b) 30 { 31 size_t alen, blen, u; 32 33 alen = (a[0] + 31) >> 5; 34 blen = (b[0] + 31) >> 5; 35 d[0] = a[0] + b[0]; 36 for (u = 0; u < blen; u ++) { 37 uint32_t f; 38 size_t v; 39 #if BR_64 40 uint64_t cc; 41 #else 42 uint32_t cc; 43 #endif 44 45 f = b[1 + u]; 46 cc = 0; 47 for (v = 0; v < alen; v ++) { 48 uint64_t z; 49 50 z = (uint64_t)d[1 + u + v] + MUL(f, a[1 + v]) + cc; 51 cc = z >> 32; 52 d[1 + u + v] = (uint32_t)z; 53 } 54 d[1 + u + alen] = (uint32_t)cc; 55 } 56 } 57