R600: Use BCNT_INT for evergreen

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210569 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 16 insertions, 5 deletions

diff --git a/lib/Target/R600/AMDGPUISelLowering.cpp b/lib/Target/R600/AMDGPUISelLowering.cpp
index 8ee453de35..83d80f0d5c 100644
--- a/lib/Target/R600/AMDGPUISelLowering.cpp
+++ b/lib/Target/R600/AMDGPUISelLowering.cpp
@@ -220,9 +220,13 @@ AMDGPUTargetLowering::AMDGPUTargetLowering(TargetMachine &TM) :
     setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
   }
 
+  if (!Subtarget->hasBCNT(32))
+    setOperationAction(ISD::CTPOP, MVT::i32, Expand);
+
+  if (!Subtarget->hasBCNT(64))
+    setOperationAction(ISD::CTPOP, MVT::i64, Expand);
+
   for (MVT VT : { MVT::i32, MVT::i64 }) {
-    // TODO: Evergreen has BCNT_INT for CTPOP
-    setOperationAction(ISD::CTPOP, VT, Expand);
     setOperationAction(ISD::CTTZ, VT, Expand);
     setOperationAction(ISD::CTLZ, VT, Expand);
   }
diff --git a/lib/Target/R600/AMDGPUSubtarget.h b/lib/Target/R600/AMDGPUSubtarget.h
index b3b3a1a0ed..e1b5b3371f 100644
--- a/lib/Target/R600/AMDGPUSubtarget.h
+++ b/lib/Target/R600/AMDGPUSubtarget.h
@@ -80,6 +80,14 @@ public:
     return hasBFE();
   }
 
+  bool hasBCNT(unsigned Size) const {
+    if (Size == 32)
+      return (getGeneration() >= EVERGREEN);
+
+    assert(Size == 64);
+    return (getGeneration() >= SOUTHERN_ISLANDS);
+  }
+
   bool hasMulU24() const {
     return (getGeneration() >= EVERGREEN);
   }
diff --git a/lib/Target/R600/EvergreenInstructions.td b/lib/Target/R600/EvergreenInstructions.td
index e09a0b2f78..0d0b9c751a 100644
--- a/lib/Target/R600/EvergreenInstructions.td
+++ b/lib/Target/R600/EvergreenInstructions.td
@@ -326,6 +326,8 @@ def MUL_UINT24_eg : R600_2OP <0xB5, "MUL_UINT24",
 def DOT4_eg : DOT4_Common<0xBE>;
 defm CUBE_eg : CUBE_Common<0xC0>;
 
+def BCNT_INT : R600_1OP_Helper <0xAA, "BCNT_INT", ctpop>;
+
 let hasSideEffects = 1 in {
   def MOVA_INT_eg : R600_1OP <0xCC, "MOVA_INT", [], VecALU>;
 }
diff --git a/lib/Target/R600/SIISelLowering.cpp b/lib/Target/R600/SIISelLowering.cpp
index d05d71add8..608aad2d3c 100644
--- a/lib/Target/R600/SIISelLowering.cpp
+++ b/lib/Target/R600/SIISelLowering.cpp
@@ -211,9 +211,6 @@ SITargetLowering::SITargetLowering(TargetMachine &TM) :
     setOperationAction(ISD::FRINT, MVT::f64, Legal);
   }
 
-  setOperationAction(ISD::CTPOP, MVT::i32, Legal);
-  setOperationAction(ISD::CTPOP, MVT::i64, Legal);
-
   setTargetDAGCombine(ISD::SELECT_CC);
   setTargetDAGCombine(ISD::SETCC);