From fa080de7afc95aa1c19a6e6fc0e0708ced2eadc4 Mon Sep 17 00:00:00 2001
From: Joseph Hunkeler <jhunkeler@gmail.com>
Date: Wed, 8 Jul 2015 20:46:52 -0400
Subject: Initial commit

---
 sys/vops/alut.gx | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 sys/vops/alut.gx

(limited to 'sys/vops/alut.gx')

diff --git a/sys/vops/alut.gx b/sys/vops/alut.gx
new file mode 100644
index 00000000..f4e01fb3
--- /dev/null
+++ b/sys/vops/alut.gx
@@ -0,0 +1,22 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+# ALUT -- Map an array using table lookup.  Note that an input value of zero
+# indexes the first element of the lookup table.  No bounds checking is
+# performed.
+
+procedure alut$t (a, b, npix, lut)
+
+$if (datatype == rd)
+int	a[ARB]				# input array of indices
+$else
+PIXEL	a[ARB]
+$endif
+
+PIXEL	b[ARB]				# output data array
+PIXEL	lut[ARB]			# lookup table
+int	npix, i
+
+begin
+	do i = 1, npix
+	    b[i] = lut[a[i]+1]
+end
-- 
cgit