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/ak/ablekx.x | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 sys/vops/ak/ablekx.x

(limited to 'sys/vops/ak/ablekx.x')

diff --git a/sys/vops/ak/ablekx.x b/sys/vops/ak/ablekx.x
new file mode 100644
index 00000000..f29abb93
--- /dev/null
+++ b/sys/vops/ak/ablekx.x
@@ -0,0 +1,33 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+# ABLEK -- Vector boolean less than or equals constant.  C[i], type INT,
+# is set to 1 if A[i] is less than or equal to B, else C[i] is set to zero.
+
+procedure ablekx (a, b, c, npix)
+
+complex	a[ARB]
+complex	b
+int	c[ARB]
+int	npix
+int	i
+real	abs_b
+
+begin
+	# The case b==0 is perhaps worth optimizing.  On many machines this
+	# will save a memory fetch.
+
+	if (b == (0.0,0.0)) {
+	    do i = 1, npix
+		if (abs (a[i]) == 0)
+		    c[i] = 1
+		else
+		    c[i] = 0
+	} else {
+	    abs_b = abs (b)
+	    do i = 1, npix
+		if (abs (a[i]) <= abs_b)
+		    c[i] = 1
+		else
+		    c[i] = 0
+	}
+end
-- 
cgit