[Hexagon] Adding DoubleRegs decoder. Moving C2_mux and A2_nop. Adding combine imm-imm form.

llvm-svn: 223494

1 files changed, 24 insertions, 0 deletions

diff --git a/llvm/lib/Target/Hexagon/Disassembler/HexagonDisassembler.cpp b/llvm/lib/Target/Hexagon/Disassembler/HexagonDisassembler.cpp
index 72ba2f5..26640c5 100644
--- a/llvm/lib/Target/Hexagon/Disassembler/HexagonDisassembler.cpp
+++ b/llvm/lib/Target/Hexagon/Disassembler/HexagonDisassembler.cpp
@@ -61,6 +61,16 @@ static const uint16_t IntRegDecoderTable[] = {
 static const uint16_t PredRegDecoderTable[] = { Hexagon::P0, Hexagon::P1,
 Hexagon::P2, Hexagon::P3 };
 
+static DecodeStatus DecodeRegisterClass(MCInst &Inst, unsigned RegNo,
+  const uint16_t Table[], size_t Size) {
+  if (RegNo < Size) {
+    Inst.addOperand(MCOperand::CreateReg(Table[RegNo]));
+    return MCDisassembler::Success;
+  }
+  else
+    return MCDisassembler::Fail;
+}
+
 static DecodeStatus DecodeIntRegsRegisterClass(MCInst &Inst, unsigned RegNo,
   uint64_t /*Address*/,
   void const *Decoder) {
@@ -72,6 +82,20 @@ static DecodeStatus DecodeIntRegsRegisterClass(MCInst &Inst, unsigned RegNo,
   return MCDisassembler::Success;
 }
 
+static DecodeStatus DecodeDoubleRegsRegisterClass(MCInst &Inst, unsigned RegNo,
+  uint64_t /*Address*/, const void *Decoder) {
+  static const uint16_t DoubleRegDecoderTable[] = {
+    Hexagon::D0, Hexagon::D1, Hexagon::D2, Hexagon::D3,
+    Hexagon::D4, Hexagon::D5, Hexagon::D6, Hexagon::D7,
+    Hexagon::D8, Hexagon::D9, Hexagon::D10, Hexagon::D11,
+    Hexagon::D12, Hexagon::D13, Hexagon::D14, Hexagon::D15
+  };
+
+  return (DecodeRegisterClass(Inst, RegNo >> 1,
+    DoubleRegDecoderTable,
+    sizeof (DoubleRegDecoderTable)));
+}
+
 static DecodeStatus DecodePredRegsRegisterClass(MCInst &Inst, unsigned RegNo,
   uint64_t /*Address*/,
   void const *Decoder) {