u16g_sub 3812 ext/uvector/uvector.c r = u16g_sub(v0, v1, clamp); u16g_sub 3827 ext/uvector/uvector.c r = u16g_sub(v0, v1, clamp); u16g_sub 3841 ext/uvector/uvector.c r = u16g_sub(v0, v1, clamp);