STEP_C0 1165 ext/gd/libgd/gd_topal.c inc0 = inc0 * (2 * STEP_C0) + STEP_C0 * STEP_C0; STEP_C0 1196 ext/gd/libgd/gd_topal.c xx0 += 2 * STEP_C0 * STEP_C0;