u8g_sub 3658 ext/uvector/uvector.c r = u8g_sub(v0, v1, clamp); u8g_sub 3673 ext/uvector/uvector.c r = u8g_sub(v0, v1, clamp); u8g_sub 3687 ext/uvector/uvector.c r = u8g_sub(v0, v1, clamp);