Port jump and call instruction decoding and patching for x64.

runtime/vm/instructions_x64_test.cc

Index: runtime/vm/instructions_x64_test.cc
===================================================================
--- runtime/vm/instructions_x64_test.cc	(revision 0)
+++ runtime/vm/instructions_x64_test.cc	(revision 0)
@@ -0,0 +1,55 @@
+// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#include "vm/globals.h"
+#if defined(TARGET_ARCH_X64)
+
+#include "vm/assembler.h"
+#include "vm/instructions.h"
+#include "vm/stub_code.h"
+#include "vm/unit_test.h"
+
+namespace dart {
+
+#define __ assembler->
+
+ASSEMBLER_TEST_GENERATE(Call, assembler) {
+  __ call(&StubCode::MegamorphicLookupLabel());
+  __ ret();
+}
+
+
+ASSEMBLER_TEST_RUN(Call, entry) {
+  Call call(entry);
+  EXPECT_EQ(StubCode::MegamorphicLookupLabel().address(), call.TargetAddress());
+}
+
+
+ASSEMBLER_TEST_GENERATE(Jump, assembler) {
+  __ jmp(&StubCode::MegamorphicLookupLabel());
+  __ jmp(&StubCode::OptimizeInvokedFunctionLabel());
+  __ ret();
+}
+
+
+ASSEMBLER_TEST_RUN(Jump, entry) {
+  Jump jump1(entry);
+  EXPECT_EQ(StubCode::MegamorphicLookupLabel().address(),
+            jump1.TargetAddress());
+  Jump jump2(entry + jump1.pattern_length_in_bytes());
+  EXPECT_EQ(StubCode::OptimizeInvokedFunctionLabel().address(),
+            jump2.TargetAddress());
+  uword target1 = jump1.TargetAddress();
+  uword target2 = jump2.TargetAddress();
+  jump1.SetTargetAddress(target2);
+  jump2.SetTargetAddress(target1);
+  EXPECT_EQ(StubCode::OptimizeInvokedFunctionLabel().address(),
+            jump1.TargetAddress());
+  EXPECT_EQ(StubCode::MegamorphicLookupLabel().address(),
+            jump2.TargetAddress());
+}
+
+}  // namespace dart
+
+#endif  // defined TARGET_ARCH_X64