Long support in optimizing compiler.
- Add stack locations to the Location class.
- Change logic of parameter passing/setup by setting the
location of such instructions the ones for the calling
convention.
Change-Id: I4730ad58732813dcb9c238f44f55dfc0baa18799
diff --git a/runtime/base/bit_field.h b/runtime/base/bit_field.h
new file mode 100644
index 0000000..e041bd0
--- /dev/null
+++ b/runtime/base/bit_field.h
@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_RUNTIME_BASE_BIT_FIELD_H_
+#define ART_RUNTIME_BASE_BIT_FIELD_H_
+
+#include "globals.h"
+#include "logging.h"
+
+namespace art {
+
+static const uword kUwordOne = 1U;
+
+// BitField is a template for encoding and decoding a bit field inside
+// an unsigned machine word.
+template<typename T, int position, int size>
+class BitField {
+ public:
+ // Tells whether the provided value fits into the bit field.
+ static bool IsValid(T value) {
+ return (static_cast<uword>(value) & ~((kUwordOne << size) - 1)) == 0;
+ }
+
+ // Returns a uword mask of the bit field.
+ static uword Mask() {
+ return (kUwordOne << size) - 1;
+ }
+
+ // Returns a uword mask of the bit field which can be applied directly to
+ // the raw unshifted bits.
+ static uword MaskInPlace() {
+ return ((kUwordOne << size) - 1) << position;
+ }
+
+ // Returns the shift count needed to right-shift the bit field to
+ // the least-significant bits.
+ static int Shift() {
+ return position;
+ }
+
+ // Returns the size of the bit field.
+ static int BitSize() {
+ return size;
+ }
+
+ // Returns a uword with the bit field value encoded.
+ static uword Encode(T value) {
+ DCHECK(IsValid(value));
+ return static_cast<uword>(value) << position;
+ }
+
+ // Extracts the bit field from the value.
+ static T Decode(uword value) {
+ return static_cast<T>((value >> position) & ((kUwordOne << size) - 1));
+ }
+
+ // Returns a uword with the bit field value encoded based on the
+ // original value. Only the bits corresponding to this bit field
+ // will be changed.
+ static uword Update(T value, uword original) {
+ DCHECK(IsValid(value));
+ return (static_cast<uword>(value) << position) |
+ (~MaskInPlace() & original);
+ }
+};
+
+} // namespace art
+
+#endif // ART_RUNTIME_BASE_BIT_FIELD_H_
diff --git a/runtime/base/bit_field_test.cc b/runtime/base/bit_field_test.cc
new file mode 100644
index 0000000..afeb2c4
--- /dev/null
+++ b/runtime/base/bit_field_test.cc
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "bit_field.h"
+#include "globals.h"
+
+#include "gtest/gtest.h"
+
+namespace art {
+
+TEST(BitFields, Test1) {
+ class TestBitFields : public BitField<int32_t, 1, 8> {};
+ ASSERT_TRUE(TestBitFields::IsValid(16));
+ ASSERT_TRUE(!TestBitFields::IsValid(256));
+ ASSERT_EQ(0x00ffU, TestBitFields::Mask());
+ ASSERT_EQ(0x001feU, TestBitFields::MaskInPlace());
+ ASSERT_EQ(1, TestBitFields::Shift());
+ ASSERT_EQ(8, TestBitFields::BitSize());
+ ASSERT_EQ(32U, TestBitFields::Encode(16));
+ ASSERT_EQ(16, TestBitFields::Decode(32));
+ ASSERT_EQ(2U, TestBitFields::Update(1, 16));
+}
+
+} // namespace art