MIPS: Add support for arch. revision 6 to mips32 port.

src/mips/constants-mips.cc

Index: src/mips/constants-mips.cc
diff --git a/src/mips/constants-mips.cc b/src/mips/constants-mips.cc
index f14992719dbf8a89c84e5dfac0070f7746cc8b3c..30e4b2e003bce967e7c2ce868b6150797b529c02 100644
--- a/src/mips/constants-mips.cc
+++ b/src/mips/constants-mips.cc
@@ -278,6 +278,8 @@ Instruction::Type Instruction::InstructionType() const {
     case COP1:    // Coprocessor instructions.
       switch (RsFieldRawNoAssert()) {
         case BC1:   // Branch on coprocessor condition.
+        case BC1EQZ:
+        case BC1NEZ:
           return kImmediateType;
         default:
           return kRegisterType;
@@ -292,6 +294,7 @@ Instruction::Type Instruction::InstructionType() const {
     case BLEZ:
     case BGTZ:
     case ADDI:
+    case DADDI:
     case ADDIU:
     case SLTI:
     case SLTIU:
@@ -303,6 +306,8 @@ Instruction::Type Instruction::InstructionType() const {
     case BNEL:
     case BLEZL:
     case BGTZL:
+    case BEQZC:
+    case BNEZC:
     case LB:
     case LH:
     case LWL: