ref: 1018d7a7091fd5e0433f501a3474cdc3fec322cc
dir: /libmp/port/mpvecadd.c/
#include "os.h" #include <mp.h> #include "dat.h" // prereq: alen >= blen, sum has at least blen+1 digits void mpvecadd(mpdigit *a, int alen, mpdigit *b, int blen, mpdigit *sum) { int i, carry; mpdigit x, y; carry = 0; for(i = 0; i < blen; i++){ x = *a++; y = *b++; x += carry; if(x < carry) carry = 1; else carry = 0; x += y; if(x < y) carry++; *sum++ = x; } for(; i < alen; i++){ x = *a++ + carry; if(x < carry) carry = 1; else carry = 0; *sum++ = x; } *sum = carry; }