PPC: Implement VSX instructions

src/ppc/disasm-ppc.cc

Index: src/ppc/disasm-ppc.cc
diff --git a/src/ppc/disasm-ppc.cc b/src/ppc/disasm-ppc.cc
index c0a02a8b9c55d2552626e7cf33f6cdef48b07610..1bffc9885ece3f2be6e7ed1bae1513520068de09 100644
--- a/src/ppc/disasm-ppc.cc
+++ b/src/ppc/disasm-ppc.cc
@@ -82,6 +82,7 @@ class Decoder {
   void DecodeExt3(Instruction* instr);
   void DecodeExt4(Instruction* instr);
   void DecodeExt5(Instruction* instr);
+  void DecodeExt6(Instruction* instr);
 
   const disasm::NameConverter& converter_;
   Vector<char> out_buffer_;
@@ -1073,6 +1074,28 @@ void Decoder::DecodeExt5(Instruction* instr) {
   Unknown(instr);  // not used by V8
 }
 
+void Decoder::DecodeExt6(Instruction* instr) {
+  switch (instr->Bits(10, 3) << 3) {
+#define DECODE_XX3_INSTRUCTIONS(name, opcode_name, opcode_value) \
+  case opcode_name: {                                            \
+    Format(instr, #name" 'Dt, 'Da, 'Db");                        \
+    return;                                                      \
+  }
+    XX3_OPCODE_LIST(DECODE_XX3_INSTRUCTIONS)
+#undef DECODE_XX3_INSTRUCTIONS
+  }
+  switch (instr->Bits(10, 2) << 2) {
+#define DECODE_XX2_INSTRUCTIONS(name, opcode_name, opcode_value) \
+  case opcode_name: {                                            \
+    Format(instr, #name" 'Dt, 'Db");                             \
+    return;                                                      \
+  }
+    XX2_OPCODE_LIST(DECODE_XX2_INSTRUCTIONS)
+  }
+#undef DECODE_XX3_INSTRUCTIONS
+  Unknown(instr);  // not used by V8
+}
+
 #undef VERIFIY
 
 // Disassemble the instruction at *instr_ptr into the output buffer.
@@ -1360,6 +1383,10 @@ int Decoder::InstructionDecode(byte* instr_ptr) {
       DecodeExt5(instr);
       break;
     }
+    case EXT6: {
+      DecodeExt6(instr);
+      break;
+    }
 #if V8_TARGET_ARCH_PPC64
     case LD: {
       switch (instr->Bits(1, 0)) {