static void add_bytes_l2_c(uint8_t *dst, uint8_t *src1, uint8_t *src2, int w) { long i; for (i = 0; i <= w - sizeof(long); i += sizeof(long)) { long a = *(long *)(src1 + i); long b = *(long *)(src2 + i); *(long *)(dst + i) = ((a & pb_7f) + (b & pb_7f)) ^ ((a ^ b) & pb_80); } for (; i < w; i++) dst[i] = src1[i] + src2[i]; }