[AMDGPU] Assembler: Support DPP instructions.

Supprot DPP syntax as used in SP3 (except several operands syntax).
Added dpp-specific operands in td-files.
Added DPP flag to TSFlags to determine if instruction is dpp in InstPrinter.
Support for VOP2 DPP instructions in td-files.
Some tests for DPP instructions.

ToDo:
  - VOP2bInst:
    - vcc is considered as operand
    - AsmMatcher doesn't apply mnemonic aliases when parsing operands
  - v_mac_f32
  - v_nop
  - disable instructions with 64-bit operands
  - change dpp_ctrl assembler representation to conform sp3

Review: http://reviews.llvm.org/D17804
llvm-svn: 263008
diff --git a/llvm/lib/Target/AMDGPU/InstPrinter/AMDGPUInstPrinter.h b/llvm/lib/Target/AMDGPU/InstPrinter/AMDGPUInstPrinter.h
index 13335a9..7a1e86b 100644
--- a/llvm/lib/Target/AMDGPU/InstPrinter/AMDGPUInstPrinter.h
+++ b/llvm/lib/Target/AMDGPU/InstPrinter/AMDGPUInstPrinter.h
@@ -33,8 +33,10 @@
                               const MCRegisterInfo &MRI);
 
 private:
+  void printU4ImmOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
   void printU8ImmOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
   void printU16ImmOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
+  void printU4ImmDecOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
   void printU8ImmDecOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
   void printU16ImmDecOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
   void printU32ImmOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
@@ -61,6 +63,10 @@
   void printImmediate64(uint64_t I, raw_ostream &O);
   void printOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
   void printOperandAndMods(const MCInst *MI, unsigned OpNo, raw_ostream &O);
+  void printDPPCtrlOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
+  void printRowMaskOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
+  void printBankMaskOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
+  void printBoundCtrlOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
   static void printInterpSlot(const MCInst *MI, unsigned OpNum, raw_ostream &O);
   void printMemOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
   static void printIfSet(const MCInst *MI, unsigned OpNo, raw_ostream &O,