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

src/mips/simulator-mips.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <limits.h>
 #include <stdarg.h>
 #include <stdlib.h>
 #include <cmath>
 
 #if V8_TARGET_ARCH_MIPS
@@ skipping 4021 matching lines @@
       break;
     case ANDI:
       SetResult(rt_reg, rs & oe_imm16);
       break;
     case ORI:
       SetResult(rt_reg, rs | oe_imm16);
       break;
     case XORI:
       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:
       set_register(rt_reg, ReadB(rs + se_imm16));
       break;
     case LH:
       set_register(rt_reg, ReadH(rs + se_imm16, instr));
       break;
     case LWL: {
       // al_offset is offset of the effective address within an aligned word.
@@ skipping 377 matching lines @@
 
 
 #undef UNSUPPORTED
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // USE_SIMULATOR
 
 #endif  // V8_TARGET_ARCH_MIPS