Add several new instructions supported by the latest MicroBlaze.

These instructions are not generated by the backend yet, this will come in a later commit.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145161 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/MBlaze/Disassembler/MBlazeDisassembler.cpp

@@ -123,6 +123,7 @@ static unsigned decodeSEXT(uint32_t insn) {
     case 0x41: return MBlaze::SRL;
     case 0x21: return MBlaze::SRC;
     case 0x01: return MBlaze::SRA;
+    case 0xE0: return MBlaze::CLZ;
     }
 }
 
@@ -176,6 +177,13 @@ static unsigned decodeBR(uint32_t insn) {
 }
 
 static unsigned decodeBRI(uint32_t insn) {
+    switch (insn&0x3FFFFFF) {
+    default:        break;
+    case 0x0020004: return MBlaze::IDMEMBAR;
+    case 0x0220004: return MBlaze::DMEMBAR;
+    case 0x0420004: return MBlaze::IMEMBAR;
+    }
+
     switch ((insn>>16)&0x1F) {
     default:   return UNSUPPORTED;
     case 0x00: return MBlaze::BRI;
@@ -531,6 +539,9 @@ MCDisassembler::DecodeStatus MBlazeDisassembler::getInstruction(MCInst &instr,
   default: 
     return Fail;
 
+  case MBlazeII::FC:
+    break;
+
   case MBlazeII::FRRRR:
     if (RD == UNSUPPORTED || RA == UNSUPPORTED || RB == UNSUPPORTED)
       return Fail;
@@ -547,6 +558,13 @@ MCDisassembler::DecodeStatus MBlazeDisassembler::getInstruction(MCInst &instr,
     instr.addOperand(MCOperand::CreateReg(RB));
     break;
 
+  case MBlazeII::FRR:
+    if (RD == UNSUPPORTED || RA == UNSUPPORTED)
+      return Fail;
+    instr.addOperand(MCOperand::CreateReg(RD));
+    instr.addOperand(MCOperand::CreateReg(RA));
+    break;
+
   case MBlazeII::FRI:
     switch (opcode) {
     default: 

lib/Target/MBlaze/MBlazeInstrFormats.td

@@ -35,6 +35,7 @@ def FRIR    : Format<17>; // RSUBI
 def FRRRR   : Format<18>; // RSUB, FRSUB
 def FRI     : Format<19>; // RSUB, FRSUB
 def FC      : Format<20>; // NOP
+def FRR     : Format<21>; // CLZ
 
 //===----------------------------------------------------------------------===//
 //  Describe MBlaze instructions format
@@ -202,3 +203,26 @@ class MSR<bits<6> op, bits<6> flags, dag outs, dag ins, string asmstr,
   let Inst{11-16} = flags;
   let Inst{17-31} = imm15;
 }
+
+//===----------------------------------------------------------------------===//
+// TCLZ instruction class in MBlaze : <|opcode|rd|imm15|>
+//===----------------------------------------------------------------------===//
+class TCLZ<bits<6> op, bits<16> flags, dag outs, dag ins, string asmstr,
+           list<dag> pattern, InstrItinClass itin> :
+           MBlazeInst<op, FRR, outs, ins, asmstr, pattern, itin> {
+  bits<5>  rd;
+  bits<5>  ra;
+
+  let Inst{6-10}  = rd;
+  let Inst{11-15}  = ra;
+  let Inst{16-31}  = flags;
+}
+
+//===----------------------------------------------------------------------===//
+// MBAR instruction class in MBlaze : <|opcode|rd|imm15|>
+//===----------------------------------------------------------------------===//
+class MBAR<bits<6> op, bits<26> flags, dag outs, dag ins, string asmstr,
+           list<dag> pattern, InstrItinClass itin> :
+           MBlazeInst<op, FC, outs, ins, asmstr, pattern, itin> {
+  let Inst{6-31}  = flags;
+}

lib/Target/MBlaze/MBlazeInstrInfo.td

@@ -594,9 +594,18 @@ let isReturn=1, isTerminator=1, hasDelaySlot=1, isBarrier=1,
 //===----------------------------------------------------------------------===//
 
 let neverHasSideEffects = 1 in {
-  def NOP :  MBlazeInst< 0x20, FC, (outs), (ins), "nop    ", [], IIC_ALU>;
+  def NOP :  MBlazeInst<0x20, FC, (outs), (ins), "nop    ", [], IIC_ALU>;
 }
 
+let Predicates=[HasPatCmp] in {
+  def CLZ :  TCLZ<0x24, 0x00E0, (outs GPR:$dst), (ins GPR:$src),
+                  "clz    $dst, $src", [], IIC_ALU>;
+}
+
+def IMEMBAR  : MBAR<0x2E, 0x0420004, (outs), (ins), "mbar   2", [], IIC_ALU>;
+def DMEMBAR  : MBAR<0x2E, 0x0220004, (outs), (ins), "mbar   1", [], IIC_ALU>;
+def IDMEMBAR : MBAR<0x2E, 0x0020004, (outs), (ins), "mbar   0", [], IIC_ALU>;
+
 let usesCustomInserter = 1 in {
   def Select_CC : MBlazePseudo<(outs GPR:$dst),
     (ins GPR:$T, GPR:$F, GPR:$CMP, i32imm:$CC), // F T reversed

lib/Target/MBlaze/MCTargetDesc/MBlazeBaseInfo.h

@@ -51,6 +51,7 @@ namespace MBlazeII {
     FRRRR,
     FRI,
     FC,
+    FRR,
     FormMask = 63
 
     //===------------------------------------------------------------------===//

test/MC/Disassembler/MBlaze/mblaze_mbar.txt

@@ -0,0 +1,14 @@
+# RUN: llvm-mc --disassemble %s -triple=mblaze-unknown-unknown | FileCheck %s
+
+################################################################################
+# Memory Barrier instructions
+################################################################################
+
+# CHECK:    mbar        0
+0xB8 0x02 0x00 0x04
+
+# CHECK:    mbar        1
+0xB8 0x22 0x00 0x04
+
+# CHECK:    mbar        2
+0xB8 0x42 0x00 0x04

test/MC/Disassembler/MBlaze/mblaze_pattern.txt

@@ -12,3 +12,6 @@
 
 # CHECK:    pcmpeq      r0, r1, r2
 0x88 0x01 0x14 0x00
+
+# CHECK:    clz         r0, r1
+0x90 0x01 0x00 0xE0