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diff --git a/sys/vops/lz/aupxx.x b/sys/vops/lz/aupxx.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+# AUPX -- Unpack the real and imaginary components of a complex vector into
+# two output vectors of some other type.
+
+procedure aupxx (a, b, c, npix)
+
+complex	a[ARB]			# input vector
+complex	b[ARB], c[ARB]	# output vectors
+int	npix
+int	i
+
+begin
+	do i = 1, npix {
+		b[i] = complex (real(a[i]), 0.0)
+		c[i] = complex (0.0, aimag(a[i]))
+	}
+end