From 9b25131b4f7845ec67d5a5d3d969a508dd3695c9 Mon Sep 17 00:00:00 2001
From: "whesse@chromium.org"
 <whesse@chromium.org@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Date: Mon, 27 Jul 2009 10:39:46 +0000
Subject: [PATCH] X64: Add mov rax,(mem64) to disassembler. Review URL:
 http://codereview.chromium.org/159397

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2540 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
---
 src/x64/disasm-x64.cc | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/src/x64/disasm-x64.cc b/src/x64/disasm-x64.cc
index 8b746c4ba4..4e91f3111c 100644
--- a/src/x64/disasm-x64.cc
+++ b/src/x64/disasm-x64.cc
@@ -1343,6 +1343,39 @@ int DisassemblerX64::InstructionDecode(v8::internal::Vector<char> out_buffer,
         data += 2;
         break;
 
+      case 0xA1:  // Fall through.
+      case 0xA3:
+        switch (operand_size()) {
+          case DOUBLEWORD_SIZE: {
+            const char* memory_location = NameOfAddress(
+                reinterpret_cast<byte*>(
+                    *reinterpret_cast<int32_t*>(data + 1)));
+            if (*data & 0x2 == 0x2) {  // Opcode 0xA3
+              AppendToBuffer("movzxlq rax,(%s)", memory_location);
+            } else {  // Opcode 0xA1
+              AppendToBuffer("movzxlq (%s),rax", memory_location);
+            }
+            data += 5;
+            break;
+          }
+          case QUADWORD_SIZE: {
+            // New x64 instruction mov rax,(imm_64).
+            const char* memory_location = NameOfAddress(
+                *reinterpret_cast<byte**>(data + 1));
+            if (*data & 0x2 == 0x2) {  // Opcode 0xA3
+              AppendToBuffer("movq rax,(%s)", memory_location);
+            } else {  // Opcode 0xA1
+              AppendToBuffer("movq (%s),rax", memory_location);
+            }
+            data += 9;
+            break;
+          }
+          default:
+            UnimplementedInstruction();
+            data += 2;
+        }
+        break;
+
       case 0xA8:
         AppendToBuffer("test al,0x%x", *reinterpret_cast<uint8_t*>(data + 1));
         data += 2;