Allow div and cmp to work in uint32 mode

src/ia32/disasm-ia32.cc

Index: src/ia32/disasm-ia32.cc
diff --git a/src/ia32/disasm-ia32.cc b/src/ia32/disasm-ia32.cc
index 9eb0d292c74001159c74ad64b7f868e69b96c220..8f22df18aecdc6dbb1f599dfc24a27ac1967df40 100644
--- a/src/ia32/disasm-ia32.cc
+++ b/src/ia32/disasm-ia32.cc
@@ -554,6 +554,7 @@ int DisassemblerIA32::F7Instruction(byte* data) {
       case 3: mnem = "neg"; break;
       case 4: mnem = "mul"; break;
       case 5: mnem = "imul"; break;
+      case 6: mnem = "div"; break;
       case 7: mnem = "idiv"; break;
       default: UnimplementedInstruction();
     }
@@ -605,7 +606,7 @@ int DisassemblerIA32::D1D3C1Instruction(byte* data) {
     }
     ASSERT_NE(NULL, mnem);
     AppendToBuffer("%s %s,", mnem, NameOfCPURegister(rm));
-    if (imm8 > 0) {
+    if (imm8 >= 0) {
       AppendToBuffer("%d", imm8);
     } else {
       AppendToBuffer("cl");