Patchwork [v5,06/16] target-or32: Add int instruction helpers

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Submitter Jia Liu
Date June 18, 2012, 1:02 a.m.
Message ID <1339981384-9117-7-git-send-email-proljc@gmail.com>
Download mbox | patch
Permalink /patch/165366/
State New
Headers show

Comments

Jia Liu - June 18, 2012, 1:02 a.m.
Add OpenRISC int instruction helpers.

Signed-off-by: Jia Liu <proljc@gmail.com>
---
 target-openrisc/Makefile.objs |    2 +-
 target-openrisc/helper.h      |    4 ++++
 target-openrisc/int_helper.c  |   51 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 56 insertions(+), 1 deletion(-)
 create mode 100644 target-openrisc/int_helper.c

Patch

diff --git a/target-openrisc/Makefile.objs b/target-openrisc/Makefile.objs
index 382190a..4286462 100644
--- a/target-openrisc/Makefile.objs
+++ b/target-openrisc/Makefile.objs
@@ -1,3 +1,3 @@ 
 obj-$(CONFIG_SOFTMMU) += machine.o
 obj-y += cpu.o excp.o intrpt.o mmu.o translate.o
-obj-y += excp_helper.o intrpt_helper.o mmu_helper.o
+obj-y += excp_helper.o int_helper.o intrpt_helper.o mmu_helper.o
diff --git a/target-openrisc/helper.h b/target-openrisc/helper.h
index 4e2a49f..96840c0 100644
--- a/target-openrisc/helper.h
+++ b/target-openrisc/helper.h
@@ -22,6 +22,10 @@ 
 /* exception */
 DEF_HELPER_FLAGS_2(exception, 0, void, env, i32)
 
+/* int */
+DEF_HELPER_FLAGS_1(ff1, 0, tl, tl)
+DEF_HELPER_FLAGS_1(fl1, 0, tl, tl)
+
 /* interrupt */
 DEF_HELPER_FLAGS_1(rfe, 0, void, env)
 
diff --git a/target-openrisc/int_helper.c b/target-openrisc/int_helper.c
new file mode 100644
index 0000000..d1ffaa5
--- /dev/null
+++ b/target-openrisc/int_helper.c
@@ -0,0 +1,51 @@ 
+/*
+ *  OpenRISC int helper routines
+ *
+ *  Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
+ *                          Feng Gao <gf91597@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "cpu.h"
+#include "helper.h"
+#include "excp.h"
+
+target_ulong HELPER(ff1)(target_ulong x)
+{
+    target_ulong n = 0;
+
+    if (x == 0) {
+        return 0;
+    }
+
+    for (n = 32; x; n--) {
+        x <<= 1;
+    }
+    return n+1;
+}
+
+target_ulong HELPER(fl1)(target_ulong x)
+{
+    target_ulong n = 0;
+
+    if (x == 0) {
+        return 0;
+    }
+
+    for (n = 0; x; n++) {
+        x >>= 1;
+    }
+    return n;
+}