Initial commit

1 files changed, 34 insertions, 0 deletions

diff --git a/sys/vops/lz/apowkr.x b/sys/vops/lz/apowkr.x
new file mode 100644
index 00000000..b22be6b7
--- /dev/null
+++ b/sys/vops/lz/apowkr.x
@@ -0,0 +1,34 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+# APOWK -- Compute a ** b, where b is a constant of type INT (generic).
+
+procedure apowkr (a, b, c, npix)
+
+real	a[ARB], c[ARB]
+int	b
+int	npix, i
+
+begin
+	# Optimize the code for the various special cases.  We assume that the
+	# compiler is intelligent enough to recognize the special cases if the
+	# power is expressed as an integer constant.
+
+	switch (b) {
+	case 0:
+	    call amovkr (1.0, c, npix)
+	case 1:
+	    call amovr (a, c, npix)
+	case 2:
+	    do i = 1, npix
+		c[i] = a[i] ** 2
+	case 3:
+	    do i = 1, npix
+		c[i] = a[i] ** 3
+	case 4:
+	    do i = 1, npix
+		c[i] = a[i] ** 4
+	default:
+	    do i = 1, npix
+		c[i] = a[i] ** b
+	}
+end