(mips) adding simulator support for AUI/DAUI/DAHI/DATI instructions.

src/mips/simulator-mips.cc

Index: src/mips/simulator-mips.cc
diff --git a/src/mips/simulator-mips.cc b/src/mips/simulator-mips.cc
index 22e4381bea08dcc05c6f60df51081e125398342e..38b7312f7fc2ffa2a53e32da6eb7fe3bee946932 100644
--- a/src/mips/simulator-mips.cc
+++ b/src/mips/simulator-mips.cc
@@ -4040,7 +4040,14 @@ void Simulator::DecodeTypeImmediate(Instruction* instr) {
       SetResult(rt_reg, rs ^ oe_imm16);
       break;
     case LUI:

[balazs.kilvady, 2015/11/26 17:10:50]

Please use this kind of comment (like at branches):
    case LUI:  // AUI, LUI (pre-r6)
In the next if else blocks on r6 both blocks are AUI's so those comments are
slightly miss-leading.

-      SetResult(rt_reg, oe_imm16 << 16);
+      if (rs_reg != 0) {
+        // AUI
+        DCHECK(IsMipsArchVariant(kMips32r6));
+        SetResult(rt_reg, rs + (se_imm16 << 16));
+      } else {
+        // LUI
+        SetResult(rt_reg, oe_imm16 << 16);
+      }
       break;
     // ------------- Memory instructions.
     case LB: