Add m[tf]vscr instructions.

llvm-svn: 27421

2 files changed, 34 insertions, 0 deletions

diff --git a/llvm/lib/Target/PowerPC/PPCInstrAltivec.td b/llvm/lib/Target/PowerPC/PPCInstrAltivec.td
index 526523f0ccc..0569e47b2f0 100644
--- a/llvm/lib/Target/PowerPC/PPCInstrAltivec.td
+++ b/llvm/lib/Target/PowerPC/PPCInstrAltivec.td
@@ -93,6 +93,13 @@ class VX2_Int<bits<11> xo, string opc, Intrinsic IntID>
 def IMPLICIT_DEF_VRRC : Pseudo<(ops VRRC:$rD), "; $rD = IMPLICIT_DEF_VRRC",
                                [(set VRRC:$rD, (v4f32 (undef)))]>;
 
+def MFVSCR : VXForm_4<1540, (ops VRRC:$vD),
+                      "mfvcr $vD", LdStGeneral,
+                      [(set VRRC:$vD, (int_ppc_altivec_mfvscr))]>; 
+def MTVSCR : VXForm_5<1604, (ops VRRC:$vB),
+                      "mtvcr $vB", LdStGeneral,
+                      [(int_ppc_altivec_mtvscr VRRC:$vB)]>; 
+
 let isLoad = 1, PPC970_Unit = 2 in {  // Loads.
 def LVEBX: XForm_1<31,   7, (ops VRRC:$vD, memrr:$src),
                    "lvebx $vD, $src", LdStGeneral,
diff --git a/llvm/lib/Target/PowerPC/PPCInstrFormats.td b/llvm/lib/Target/PowerPC/PPCInstrFormats.td
index 805e1258c53..c3a78e65bf9 100644
--- a/llvm/lib/Target/PowerPC/PPCInstrFormats.td
+++ b/llvm/lib/Target/PowerPC/PPCInstrFormats.td
@@ -697,6 +697,33 @@ class VXForm_3<bits<11> xo, dag OL, string asmstr,
   let Inst{21-31} = xo;
 }
 
+/// VXForm_4 - VX instructions with "VD,0,0" register fields, like mfvscr.
+class VXForm_4<bits<11> xo, dag OL, string asmstr,
+               InstrItinClass itin, list<dag> pattern>
+    : I<4, OL, asmstr, itin> {
+  bits<5> VD;
+  
+  let Pattern = pattern;
+  
+  let Inst{6-10}  = VD;
+  let Inst{11-15} = 0;
+  let Inst{16-20} = 0;
+  let Inst{21-31} = xo;
+}
+
+/// VXForm_5 - VX instructions with "0,0,VB" register fields, like mtvscr.
+class VXForm_5<bits<11> xo, dag OL, string asmstr,
+               InstrItinClass itin, list<dag> pattern>
+    : I<4, OL, asmstr, itin> {
+  bits<5> VB;
+  
+  let Pattern = pattern;
+  
+  let Inst{6-10}  = 0;
+  let Inst{11-15} = 0;
+  let Inst{16-20} = VB;
+  let Inst{21-31} = xo;
+}
 
 // E-4 VXR-Form
 class VXRForm_1<bits<10> xo, dag OL, string asmstr,