xp1               534 ext/gd/libgd/gd_interpolation.c 		const double xp1 = x + 1.0f;
xp1               538 ext/gd/libgd/gd_interpolation.c 		if ((xp1) <= 0.0f) b = 0.0f; else b = xp1*xp1*xp1;