summaryrefslogtreecommitdiff
path: root/usr/src/lib/libmvec/common/__vc_pow.c
diff options
context:
space:
mode:
Diffstat (limited to 'usr/src/lib/libmvec/common/__vc_pow.c')
-rw-r--r--usr/src/lib/libmvec/common/__vc_pow.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/usr/src/lib/libmvec/common/__vc_pow.c b/usr/src/lib/libmvec/common/__vc_pow.c
new file mode 100644
index 0000000000..b483ffe896
--- /dev/null
+++ b/usr/src/lib/libmvec/common/__vc_pow.c
@@ -0,0 +1,56 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
+ */
+/*
+ * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifdef __RESTRICT
+#define restrict _Restrict
+#else
+#define restrict
+#endif
+
+extern void __vc_exp(int, float *, int, float *, int, float *);
+extern void __vc_log(int, float *, int, float *, int);
+
+void
+__vc_pow(int n, float * restrict x, int stridex, float * restrict y,
+ int stridey, float * restrict z, int stridez, float * restrict tmp)
+{
+ float r;
+ int i, j, k;
+
+ __vc_log(n, x, stridex, tmp, 1);
+ stridey <<= 1;
+ for (i = j = 0; i < n; i++, j += stridey)
+ {
+ k = i << 1;
+ r = y[j] * tmp[k] - y[j+1] * tmp[k+1];
+ tmp[k+1] = y[j+1] * tmp[k] + y[j] * tmp[k+1];
+ tmp[k] = r;
+ }
+ __vc_exp(n, tmp, 1, z, stridez, tmp + n + n);
+}