[PowerPC] Implement xscmpeqqp, xscmpgeqp, xscmpgtqp instructions

[maryammo]

Summary

This patch adds 3 Power10 VSX Scalar compare for quad precision
instructions including xscmpeqqp, xscmpgeqp, xscmpgtqp

[amyk]

LGTM.

llvm/lib/Target/PowerPC/P10InstrResources.td

def : InstRW<[P10W_DX_5C, P10W_DISP_ANY, P10DX_Read, P10DX_Read],
     BCDUS_rec,
     BCDUTRUNC_rec,
     VADDCUQ,
     VADDUQM,
     VMUL10ECUQ,
     VMUL10EUQ,
     VSUBCUQ,
     VSUBUQM,
+    XSCMPEQQP,
     XSCMPEXPQP,
+    XSCMPGEQP,
+    XSCMPGTQP,
     XSCMPOQP,
     XSCMPUQP,
     XSMAXCQP,
     XSMINCQP,
     XSTSTDCQP,
     XXGENPCVBM
 )>;
 

llvm/lib/Target/PowerPC/PPCInstrP10.td

let Predicates = [PairedVectorMemops] in {
   def : Pat<(int_ppc_vsx_stxvp v256i1:$XSp, XForm:$dst),
             (STXVPX $XSp, XForm:$dst)>;
   let Predicates = [PairedVectorMemops, PrefixInstrs] in {
     def : Pat<(int_ppc_vsx_stxvp v256i1:$XSp, PDForm:$dst),
               (PSTXVP $XSp, memri34:$dst)>;
   }
 }
 
+let Predicates = [IsISA3_1] in {
+  def XSCMPEQQP : X_VT5_VA5_VB5<63, 68, "xscmpeqqp", []>;
+  def XSCMPGEQP : X_VT5_VA5_VB5<63, 196, "xscmpgeqp", []>;
+  def XSCMPGTQP : X_VT5_VA5_VB5<63, 228, "xscmpgtqp", []>;
+}
+
 let Predicates = [PCRelativeMemops] in {
   // Load i32
   def : Pat<(i32 (zextloadi1  (PPCmatpcreladdr PCRelForm:$ga))),
             (PLBZpc $ga, 0)>;
   def : Pat<(i32 (extloadi1  (PPCmatpcreladdr PCRelForm:$ga))),
             (PLBZpc $ga, 0)>;
   def : Pat<(i32 (zextloadi8  (PPCmatpcreladdr PCRelForm:$ga))),
             (PLBZpc $ga, 0)>;

llvm/test/MC/Disassembler/PowerPC/ppc64-encoding-ISA31.txt

 0xfd 0xb 0xe6 0x88
 
 # CHECK: xsmaxcqp 2, 2, 3
 0xfc 0x42 0x1d 0x48
 
 # CHECK: xsmincqp 2, 2, 3
 0xfc 0x42 0x1d 0xc8
 
+# CHECK: xscmpeqqp 1, 2, 2
+0xfc 0x22 0x10 0x88
+
+# CHECK: xscmpgeqp 1, 2, 3
+0xfc 0x22 0x19 0x88
+
+# CHECK: xscmpgtqp 1, 2, 4
+0xfc 0x22 0x21 0xc8
+
 # CHECK: vstribr 2, 2
 0x10 0x41 0x10 0x0d
 
 # CHECK: vstribl 2, 2
 0x10 0x40 0x10 0x0d
 
 # CHECK: vstrihr 2, 2
 0x10 0x43 0x10 0x0d

llvm/test/MC/PowerPC/ppc64-encoding-ISA31.s

 # CHECK-LE: xscvsqqp 8, 28                        # encoding: [0x88,0xe6,0x0b,0xfd]
             xscvsqqp 8, 28
 # CHECK-BE: xsmaxcqp 2, 2, 3                      # encoding: [0xfc,0x42,0x1d,0x48]
 # CHECK-LE: xsmaxcqp 2, 2, 3                      # encoding: [0x48,0x1d,0x42,0xfc]
             xsmaxcqp 2, 2, 3
 # CHECK-BE: xsmincqp 2, 2, 3                      # encoding: [0xfc,0x42,0x1d,0xc8]
 # CHECK-LE: xsmincqp 2, 2, 3                      # encoding: [0xc8,0x1d,0x42,0xfc]
             xsmincqp 2, 2, 3
+# CHECK-BE: xscmpeqqp 1, 2, 2                     # encoding: [0xfc,0x22,0x10,0x88]
+# CHECK-LE: xscmpeqqp 1, 2, 2                     # encoding: [0x88,0x10,0x22,0xfc]
+            xscmpeqqp 1, 2, 2
+# CHECK-BE: xscmpgeqp 1, 2, 3                     # encoding: [0xfc,0x22,0x19,0x88]
+# CHECK-LE: xscmpgeqp 1, 2, 3                     # encoding: [0x88,0x19,0x22,0xfc]
+            xscmpgeqp 1, 2, 3
+# CHECK-BE: xscmpgtqp 1, 2, 4                     # encoding: [0xfc,0x22,0x21,0xc8]
+# CHECK-LE: xscmpgtqp 1, 2, 4                     # encoding: [0xc8,0x21,0x22,0xfc]
+            xscmpgtqp 1, 2, 4
 # CHECK-BE: vstribr 2, 2                          # encoding: [0x10,0x41,0x10,0x0d]
 # CHECK-LE: vstribr 2, 2                          # encoding: [0x0d,0x10,0x41,0x10]
             vstribr 2, 2
 # CHECK-BE: vstribl 2, 2                          # encoding: [0x10,0x40,0x10,0x0d]
 # CHECK-LE: vstribl 2, 2                          # encoding: [0x0d,0x10,0x40,0x10]
             vstribl 2, 2
 # CHECK-BE: vstrihr 2, 2                          # encoding: [0x10,0x43,0x10,0x0d]
 # CHECK-LE: vstrihr 2, 2                          # encoding: [0x0d,0x10,0x43,0x10]