1 files changed, 133 insertions, 0 deletions
diff --git a/post/lib_ppc/cmp.c b/post/lib_ppc/cmp.c
new file mode 100644
index 0000000000..789a24cb7f
--- /dev/null
+++ b/post/lib_ppc/cmp.c
@@ -0,0 +1,133 @@
+/*
+ * (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
+ * Integer compare instructions:	cmpw, cmplw
+ *
+ * To verify these instructions the test runs them with
+ * different combinations of operands, reads the condition
+ * register value and compares it with the expected one.
+ * The test contains a pre-built table
+ * containing the description of each test case: the instruction,
+ * the values of the operands, the condition field to save
+ * the result in and the expected result.
+ */
+
+#ifdef CONFIG_POST
+
+#include <post.h>
+#include "cpu_asm.h"
+
+#if CONFIG_POST & CFG_POST_CPU
+
+extern void cpu_post_exec_12 (ulong *code, ulong *res, ulong op1, ulong op2);
+
+static struct cpu_post_cmp_s
+{
+    ulong cmd;
+    ulong op1;
+    ulong op2;
+    ulong cr;
+    ulong res;
+} cpu_post_cmp_table[] =
+{
+    {
+	OP_CMPW,
+	123,
+	123,
+	2,
+	0x02
+    },
+    {
+	OP_CMPW,
+	123,
+	133,
+	3,
+	0x08
+    },
+    {
+	OP_CMPW,
+	123,
+	-133,
+	4,
+	0x04
+    },
+    {
+	OP_CMPLW,
+	123,
+	123,
+	2,
+	0x02
+    },
+    {
+	OP_CMPLW,
+	123,
+	-133,
+	3,
+	0x08
+    },
+    {
+	OP_CMPLW,
+	123,
+	113,
+	4,
+	0x04
+    },
+};
+static unsigned int cpu_post_cmp_size =
+    sizeof (cpu_post_cmp_table) / sizeof (struct cpu_post_cmp_s);
+
+int cpu_post_test_cmp (void)
+{
+    int ret = 0;
+    unsigned int i;
+
+    for (i = 0; i < cpu_post_cmp_size && ret == 0; i++)
+    {
+	struct cpu_post_cmp_s *test = cpu_post_cmp_table + i;
+    	unsigned long code[] =
+	{
+	    ASM_2C(test->cmd, test->cr, 3, 4),
+	    ASM_MFCR(3),
+	    ASM_BLR
+	};
+	ulong res;
+
+	cpu_post_exec_12 (code, & res, test->op1, test->op2);
+
+	ret = ((res >> (28 - 4 * test->cr)) & 0xe) == test->res ? 0 : -1;
+
+	if (ret != 0)
+	{
+	    post_log ("Error at cmp test %d !\n", i);
+	}
+    }
+
+    return ret;
+}
+
+#endif
+#endif