ps][microMIPS] Implement ADDIUR2 instruction

Differential Revision: http://reviews.llvm.org/D5151

llvm-svn: 220476

5 files changed, 53 insertions, 0 deletions

diff --git a/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp b/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
index 501b1d276a7..ee67f74ce30 100644
--- a/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
+++ b/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
@@ -1178,6 +1178,15 @@ bool MipsAsmParser::processInstruction(MCInst &Inst, SMLoc IDLoc,
         if (Imm < -1 || Imm > 126)
           return Error(IDLoc, "immediate operand value out of range");
         break;
+      case Mips::ADDIUR2_MM:
+        Opnd = Inst.getOperand(2);
+        if (!Opnd.isImm())
+          return Error(IDLoc, "expected immediate operand kind");
+        Imm = Opnd.getImm();
+        if (!(Imm == 1 || Imm == -1 ||
+              ((Imm % 4 == 0) && Imm < 28 && Imm > 0)))
+          return Error(IDLoc, "immediate operand value out of range");
+        break;
     }
   }
 
diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp b/llvm/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
index 020c3f6d8c6..ddb52f6d4e1 100644
--- a/llvm/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
+++ b/llvm/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
@@ -364,6 +364,20 @@ getUImm5Lsl2Encoding(const MCInst &MI, unsigned OpNo,
 }
 
 unsigned MipsMCCodeEmitter::
+getSImm3Lsa2Value(const MCInst &MI, unsigned OpNo,
+                  SmallVectorImpl<MCFixup> &Fixups,
+                  const MCSubtargetInfo &STI) const {
+
+  const MCOperand &MO = MI.getOperand(OpNo);
+  if (MO.isImm()) {
+    int Value = MO.getImm();
+    return Value >> 2;
+  }
+
+  return 0;
+}
+
+unsigned MipsMCCodeEmitter::
 getSImm9AddiuspValue(const MCInst &MI, unsigned OpNo,
                      SmallVectorImpl<MCFixup> &Fixups,
                      const MCSubtargetInfo &STI) const {
diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.h b/llvm/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.h
index 32ed5cc9d18..3bb9f2b7a03 100644
--- a/llvm/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.h
+++ b/llvm/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.h
@@ -80,6 +80,10 @@ public:
                                 SmallVectorImpl<MCFixup> &Fixups,
                                 const MCSubtargetInfo &STI) const;
 
+  unsigned getSImm3Lsa2Value(const MCInst &MI, unsigned OpNo,
+                             SmallVectorImpl<MCFixup> &Fixups,
+                             const MCSubtargetInfo &STI) const;
+
   // getSImm9AddiuspValue - Return binary encoding of the microMIPS addiusp
   // instruction immediate operand.
   unsigned getSImm9AddiuspValue(const MCInst &MI, unsigned OpNo,
diff --git a/llvm/lib/Target/Mips/MicroMipsInstrFormats.td b/llvm/lib/Target/Mips/MicroMipsInstrFormats.td
index ae80b4f7e6d..23c8dd6d1b2 100644
--- a/llvm/lib/Target/Mips/MicroMipsInstrFormats.td
+++ b/llvm/lib/Target/Mips/MicroMipsInstrFormats.td
@@ -81,6 +81,20 @@ class SHIFT_FM_MM16<bits<1> funct> {
   let Inst{0}     = funct;
 }
 
+class ADDIUR2_FM_MM16 {
+  bits<3> rd;
+  bits<3> rs;
+  bits<3> imm;
+
+  bits<16> Inst;
+
+  let Inst{15-10} = 0x1b;
+  let Inst{9-7}   = rd;
+  let Inst{6-4}   = rs;
+  let Inst{3-1}   = imm;
+  let Inst{0}     = 0;
+}
+
 class ADDIUS5_FM_MM16 {
   bits<5> rd;
   bits<4> imm;
diff --git a/llvm/lib/Target/Mips/MicroMipsInstrInfo.td b/llvm/lib/Target/Mips/MicroMipsInstrInfo.td
index 3efa17cdc8c..2cd59224a92 100644
--- a/llvm/lib/Target/Mips/MicroMipsInstrInfo.td
+++ b/llvm/lib/Target/Mips/MicroMipsInstrInfo.td
@@ -19,6 +19,10 @@ def uimm3_shift : Operand<i32> {
   let EncoderMethod = "getUImm3Mod8Encoding";
 }
 
+def simm3_lsa2 : Operand<i32> {
+  let EncoderMethod = "getSImm3Lsa2Value";
+}
+
 def immZExt2Shift : ImmLeaf<i32, [{return Imm >= 1 && Imm <= 8;}]>;
 
 def immLi16 : ImmLeaf<i32, [{return Imm >= -1 && Imm <= 126;}]>;
@@ -131,6 +135,13 @@ class ShiftIMM16<string opstr, Operand ImmOpnd,
                   !strconcat(opstr, "\t$rd, $rt, $shamt"),
                   [(set RO:$rd, (OpNode RO:$rt, PF:$shamt))], Itin, FrmR>;
 
+class AddImmUR2<string opstr, RegisterOperand RO> :
+  MicroMipsInst16<(outs RO:$rd), (ins RO:$rs, simm3_lsa2:$imm),
+                  !strconcat(opstr, "\t$rd, $rs, $imm"),
+                  [], NoItinerary, FrmR> {
+  let isCommutable = 1;
+}
+
 class AddImmUS5<string opstr, RegisterOperand RO> :
   MicroMipsInst16<(outs RO:$dst), (ins RO:$rd, simm4:$imm),
                   !strconcat(opstr, "\t$rd, $imm"), [], NoItinerary, FrmR> {
@@ -245,6 +256,7 @@ def SLL16_MM : ShiftIMM16<"sll16", uimm3_shift, GPRMM16Opnd, shl,
                           immZExt2Shift, II_SLL>, SHIFT_FM_MM16<0>;
 def SRL16_MM : ShiftIMM16<"srl16", uimm3_shift, GPRMM16Opnd, srl,
                           immZExt2Shift, II_SRL>, SHIFT_FM_MM16<1>;
+def ADDIUR2_MM : AddImmUR2<"addiur2", GPRMM16Opnd>, ADDIUR2_FM_MM16;
 def ADDIUS5_MM : AddImmUS5<"addius5", GPR32Opnd>, ADDIUS5_FM_MM16;
 def ADDIUSP_MM : AddImmUSP<"addiusp">, ADDIUSP_FM_MM16;
 def MFHI16_MM : MoveFromHILOMM<"mfhi", GPR32Opnd, AC0>, MFHILO_FM_MM16<0x10>;