MIPS: Implemented PC-relative instructions for R6.

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 9facbda94d4810a39c7f7695ab0351d7096db893..b834007007a1da9226a4c5d4c2ec926e8b10357e 100644
--- a/src/mips/constants-mips.cc
+++ b/src/mips/constants-mips.cc
@@ -141,6 +141,8 @@ bool Instruction::IsForbiddenInBranchDelay() const {
     case BNEL:
     case BLEZL:
     case BGTZL:
+    case BC:
+    case BALC:
       return true;
     case REGIMM:
       switch (RtFieldRaw()) {
@@ -173,6 +175,11 @@ bool Instruction::IsLinkingInstruction() const {
   switch (op) {
     case JAL:
       return true;
+    case POP76:
+      if (RsFieldRawNoAssert() == JIALC)
+        return true;  // JIALC
+      else
+        return false;  // BNEZC
     case REGIMM:
       switch (RtFieldRaw()) {
         case BGEZAL:
@@ -272,8 +279,25 @@ Instruction::Type Instruction::InstructionType() const {
       switch (FunctionFieldRaw()) {
         case INS:
         case EXT:
-        case BITSWAP:
           return kRegisterType;
+        case BSHFL: {
+          int sa = SaFieldRaw() >> kSaShift;
+          switch (sa) {
+            case BITSWAP:
+              return kRegisterType;
+            case WSBH:
+            case SEB:
+            case SEH:
+              return kUnsupported;
+          }
+          sa >>= kBp2Bits;
+          switch (sa) {
+            case ALIGN:
+              return kRegisterType;
+            default:
+              return kUnsupported;
+          }
+        }
         default:
           return kUnsupported;
       }
@@ -309,8 +333,8 @@ Instruction::Type Instruction::InstructionType() const {
     case BNEL:
     case BLEZL:
     case BGTZL:
-    case BEQZC:
-    case BNEZC:
+    case POP66:
+    case POP76:
     case LB:
     case LH:
     case LWL:
@@ -327,6 +351,9 @@ Instruction::Type Instruction::InstructionType() const {
     case LDC1:
     case SWC1:
     case SDC1:
+    case PCREL:
+    case BC:
+    case BALC:
       return kImmediateType;
     // 26 bits immediate type instructions. e.g.: j imm26.
     case J: