Add lswi / stswi for assembler use with a warning to not add patterns

for them.

llvm-svn: 214862

llvm/lib/Target/PowerPC/PPCInstrInfo.td

@@ -3037,6 +3037,16 @@ def : Pat<(i1 (not (trunc i64:$in))),
 // PowerPC Instructions used for assembler/disassembler only
 //
 
+// FIXME: For B=0 or B > 8, the registers following RT are used.
+// WARNING: Do not add patterns for this instruction without fixing this.
+def LSWI  : XForm_base_r3xo<31, 597, (outs gprc:$RT), (ins gprc:$A, u5imm:$B),
+                            "lswi $RT, $A, $B", IIC_LdStLoad, []>;
+
+// FIXME: For B=0 or B > 8, the registers following RT are used.
+// WARNING: Do not add patterns for this instruction without fixing this.
+def STSWI : XForm_base_r3xo<31, 725, (outs), (ins gprc:$RT, gprc:$A, u5imm:$B),
+                            "stswi $RT, $A, $B", IIC_LdStLoad, []>;
+
 def ISYNC : XLForm_2_ext<19, 150, 0, 0, 0, (outs), (ins),
                          "isync", IIC_SprISYNC, []>;
 

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

@@ -2266,3 +2266,8 @@
 
 # CHECK: tlbia
 0x7c 0x00 0x02 0xe4
+
+# CHECK: lswi 8, 6, 7
+0x7d 0x06 0x3c 0xaa
+# CHECK: stswi 8, 6, 7
+0x7d 0x06 0x3d 0xaa

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

@@ -3609,3 +3609,10 @@
 # CHECK-BE: tlbia                            # encoding: [0x7c,0x00,0x02,0xe4]
 # CHECK-LE: tlbia                            # encoding: [0xe4,0x02,0x00,0x7c]
             tlbia
+
+# CHECK-BE: lswi 8, 6, 7                     # encoding: [0x7d,0x06,0x3c,0xaa]
+# CHECK-LE: lswi 8, 6, 7                     # encoding: [0xaa,0x3c,0x06,0x7d]
+            lswi %r8, %r6, 7
+# CHECK-BE: stswi 8, 6, 7                    # encoding: [0x7d,0x06,0x3d,0xaa]
+# CHECK-LE: stswi 8, 6, 7                    # encoding: [0xaa,0x3d,0x06,0x7d]
+            stswi %r8, %r6, 7