[PowerPC] Implement Context Switch Instr mtlpl (llvm#160593)

Add new instruction `mtlpl`.

Author: lei137

llvm/lib/Target/PowerPC/PPCInstrFuture.td

@@ -194,6 +194,22 @@ class XX3Form_XTAB6<bits<6> opcode, bits<8> xo, dag OOL, dag IOL, string asmstr,
   let Inst{31} = XT{5};
 }
 
+class XForm_RBS5<bits<6> opCode, bits<10> xo, dag OOL, dag IOL, string asmstr,
+                 InstrItinClass itin, list<dag> pattern>
+    : I<opCode, OOL, IOL, asmstr, itin> {
+
+  bits<5> RB;
+  bits<5> RS;
+
+  let Pattern = pattern;
+
+  let Inst{6...10} = RS;
+  let Inst{11...15} = 0;
+  let Inst{16...20} = RB;
+  let Inst{21...30} = xo;
+  let Inst{31} = 0;
+}
+
 class XX3Form_XTAB6_S<bits<5> xo, dag OOL, dag IOL, string asmstr,
                        list<dag> pattern>
     : I<59, OOL, IOL, asmstr, NoItinerary> {
@@ -317,12 +333,16 @@ let Predicates = [IsISAFuture] in {
   def TLBIEIO
       : XForm_RSB5_UIMM2<31, 18, (outs), (ins g8rc:$RB, g8rc:$RS, u2imm:$RIC),
                          "tlbieio $RB, $RS, $RIC", []>;
+  def MTLPL : XForm_RBS5<31, 275, (outs), (ins gprc:$RB, gprc:$RS),
+                         "mtlpl $RB, $RS", IIC_SprMTSPR, []>;
   let Interpretation64Bit = 1, isCodeGenOnly = 1 in {
     def TLBIEP8
         : XForm_RSB5_UIMM2_2UIMM1<31, 50, (outs),
                                   (ins g8rc:$RB, g8rc:$RS, u2imm:$RIC,
                                       u1imm:$PRS, u1imm:$R),
                                   "tlbiep $RB, $RS, $RIC, $PRS, $R", []>;
+    def MTLPL8 : XForm_RBS5<31, 275, (outs), (ins g8rc:$RB, g8rc:$RS),
+                            "mtlpl $RB, $RS", IIC_SprMTSPR, []>, isPPC64;
   }
 }
 

llvm/test/MC/Disassembler/PowerPC/ppc-encoding-ISAFuture.txt

@@ -286,6 +286,9 @@
 #CHECK: xvmulhuh  4, 5, 7
 0xf0,0x85,0x3b,0xd0
 
+#CHECK: mtlpl 3, 4
+0x7c,0x80,0x1a,0x26
+
 #CHECK: xxmulmul 8, 3, 4, 2
 0xed,0x03,0x22,0x08
 

llvm/test/MC/Disassembler/PowerPC/ppc64le-encoding-ISAFuture.txt

@@ -280,6 +280,9 @@
 #CHECK: xvmulhuh  4, 5, 7
 0xd0,0x3b,0x85,0xf0
 
+#CHECK: mtlpl 3, 4
+0x26,0x1a,0x80,0x7c
+
 #CHECK: xxmulmul 8, 3, 4, 2
 0x08,0x22,0x03,0xed
 

llvm/test/MC/PowerPC/ppc-encoding-ISAFuture.s

@@ -403,6 +403,10 @@
 #CHECK-BE: xvmulhuh 4, 5, 7              # encoding: [0xf0,0x85,0x3b,0xd0]
 #CHECK-LE: xvmulhuh 4, 5, 7              # encoding: [0xd0,0x3b,0x85,0xf0]
 
+           mtlpl 3, 4
+#CHECK-BE: mtlpl 3, 4                     # encoding: [0x7c,0x80,0x1a,0x26]
+#CHECK-LE: mtlpl 3, 4                     # encoding: [0x26,0x1a,0x80,0x7c]
+
            xxmulmul 8, 3, 4, 2
 #CHECK-BE: xxmulmul 8, 3, 4, 2          # encoding: [0xed,0x03,0x22,0x08]
 #CHECK-LE: xxmulmul 8, 3, 4, 2          # encoding: [0x08,0x22,0x03,0xed]