1 files changed, 126 insertions, 0 deletions
diff --git a/post/cpu/complex.c b/post/cpu/complex.c
new file mode 100644
index 0000000..dc8b080
--- /dev/null
+++ b/post/cpu/complex.c
@@ -0,0 +1,126 @@
+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+
+/*
+ * CPU test
+ * Complex calculations
+ *
+ * The calculations in this test are just a combination of simpler
+ * calculations, but probably under different timing conditions, etc.
+ */
+
+#ifdef CONFIG_POST
+
+#include <post.h>
+#include "cpu_asm.h"
+
+#if CONFIG_POST & CFG_POST_CPU
+
+extern int cpu_post_complex_1_asm (int a1, int a2, int a3, int a4, int n);
+extern int cpu_post_complex_2_asm (int x, int n);
+
+  /*
+   *     n
+   *	SUM (a1 * a2 - a3) / a4 = n * result
+   *    i=1
+   */
+static int cpu_post_test_complex_1 (void)
+{
+    int a1 = 666;
+    int a2 = 667;
+    int a3 = 668;
+    int a4 = 66;
+    int n = 100;
+    int result = 6720; /* (a1 * a2 - a3) / a4 */
+
+    if (cpu_post_complex_1_asm(a1, a2, a3, a4, n) != n * result)
+    {
+	return -1;
+    }
+
+    return 0;
+}
+
+  /*	(1 + x + x^2 + ... + x^n) * (1 - x) = 1 - x^(n+1)
+   */
+static int cpu_post_test_complex_2 (void)
+{
+    int ret = -1;
+    int x;
+    int n;
+    int k;
+    int left;
+    int right;
+
+    for (x = -8; x <= 8; x ++)
+    {
+	n = 9;
+
+	left = cpu_post_complex_2_asm(x, n);
+	left *= 1 - x;
+
+	right = 1;
+	for (k = 0; k <= n; k ++)
+	{
+	    right *= x;
+	}
+	right = 1 - right;
+
+	if (left != right)
+	{
+	    goto Done;
+	}
+    }
+
+    ret = 0;
+    Done:
+
+    return ret;
+}
+
+int cpu_post_test_complex (void)
+{
+    int ret = 0;
+
+    if (ret == 0)
+    {
+	ret = cpu_post_test_complex_1();
+    }
+
+    if (ret == 0)
+    {
+	ret = cpu_post_test_complex_2();
+    }
+
+    if (ret != 0)
+    {
+        post_log ("Error at complex test !\n");
+    }
+
+    return ret;
+}
+
+#endif
+#endif