/* * GENz (triple parity with powers of 2^-1) 32bit C implementation */ void raid_genz_int32(int nd, size_t size, void **vv) { uint8_t **v = (uint8_t **)vv; uint8_t *p; uint8_t *q; uint8_t *r; int d, l; size_t i; uint32_t d0, r0, q0, p0; uint32_t d1, r1, q1, p1; l = nd - 1; p = v[nd]; q = v[nd+1]; r = v[nd+2]; for (i = 0; i < size; i += 8) { r0 = q0 = p0 = v_32(v[l][i]); r1 = q1 = p1 = v_32(v[l][i+4]); for (d = l-1; d >= 0; --d) { d0 = v_32(v[d][i]); d1 = v_32(v[d][i+4]); p0 ^= d0; p1 ^= d1; q0 = x2_32(q0); q1 = x2_32(q1); q0 ^= d0; q1 ^= d1; r0 = d2_32(r0); r1 = d2_32(r1); r0 ^= d0; r1 ^= d1; } v_32(p[i]) = p0; v_32(p[i+4]) = p1; v_32(q[i]) = q0; v_32(q[i+4]) = q1; v_32(r[i]) = r0; v_32(r[i+4]) = r1; } }
/* * GEN1 (RAID5 with xor) 32bit C implementation */ void raid_gen1_int32(int nd, size_t size, void **vv) { uint8_t **v = (uint8_t **)vv; uint8_t *p; int d, l; size_t i; uint32_t p0; uint32_t p1; l = nd - 1; p = v[nd]; for (i = 0; i < size; i += 8) { p0 = v_32(v[l][i]); p1 = v_32(v[l][i + 4]); for (d = l - 1; d >= 0; --d) { p0 ^= v_32(v[d][i]); p1 ^= v_32(v[d][i + 4]); } v_32(p[i]) = p0; v_32(p[i + 4]) = p1; } }