R600/SI: expose TBUFFER_STORE_FORMAT_* for OpenGL transform feedback

For _XYZ, the type of VDATA is v4i32, because v3i32 doesn't exist.

The ADDR64 bit is not exposed. A simpler intrinsic that doesn't take
a resource descriptor might be nicer.

The maximum number of input SGPRs is bumped to 17.

Signed-off-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190575 91177308-0d34-0410-b5e6-96231b3b80d8

7 files changed, 113 insertions, 5 deletions

diff --git a/lib/Target/R600/AMDGPUCallingConv.td b/lib/Target/R600/AMDGPUCallingConv.td
index 84d3118..d26be32 100644
--- a/lib/Target/R600/AMDGPUCallingConv.td
+++ b/lib/Target/R600/AMDGPUCallingConv.td
@@ -19,7 +19,8 @@ def CC_SI : CallingConv<[
 
   CCIfInReg<CCIfType<[f32, i32] , CCAssignToReg<[
     SGPR0, SGPR1, SGPR2, SGPR3, SGPR4, SGPR5, SGPR6, SGPR7,
-    SGPR8, SGPR9, SGPR10, SGPR11, SGPR12, SGPR13, SGPR14, SGPR15
+    SGPR8, SGPR9, SGPR10, SGPR11, SGPR12, SGPR13, SGPR14, SGPR15,
+    SGPR16
   ]>>>,
 
   CCIfInReg<CCIfType<[i64] , CCAssignToRegWithShadow<
diff --git a/lib/Target/R600/AMDGPUISelLowering.cpp b/lib/Target/R600/AMDGPUISelLowering.cpp
index d6b7cbe..f6c074a 100644
--- a/lib/Target/R600/AMDGPUISelLowering.cpp
+++ b/lib/Target/R600/AMDGPUISelLowering.cpp
@@ -724,5 +724,6 @@ const char* AMDGPUTargetLowering::getTargetNodeName(unsigned Opcode) const {
   NODE_NAME_CASE(SAMPLED)
   NODE_NAME_CASE(SAMPLEL)
   NODE_NAME_CASE(STORE_MSKOR)
+  NODE_NAME_CASE(TBUFFER_STORE_FORMAT)
   }
 }
diff --git a/lib/Target/R600/AMDGPUISelLowering.h b/lib/Target/R600/AMDGPUISelLowering.h
index 75ac4c2..8a68356 100644
--- a/lib/Target/R600/AMDGPUISelLowering.h
+++ b/lib/Target/R600/AMDGPUISelLowering.h
@@ -160,6 +160,7 @@ enum {
   FIRST_MEM_OPCODE_NUMBER = ISD::FIRST_TARGET_MEMORY_OPCODE,
   STORE_MSKOR,
   LOAD_CONSTANT,
+  TBUFFER_STORE_FORMAT,
   LAST_AMDGPU_ISD_NUMBER
 };
 
diff --git a/lib/Target/R600/SIISelLowering.cpp b/lib/Target/R600/SIISelLowering.cpp
index 05b7b5d..2174753 100644
--- a/lib/Target/R600/SIISelLowering.cpp
+++ b/lib/Target/R600/SIISelLowering.cpp
@@ -86,6 +86,8 @@ SITargetLowering::SITargetLowering(TargetMachine &TM) :
   setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::v16i8, Custom);
   setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::v4f32, Custom);
 
+  setOperationAction(ISD::INTRINSIC_VOID, MVT::Other, Custom);
+
   setLoadExtAction(ISD::SEXTLOAD, MVT::i32, Expand);
 
   setLoadExtAction(ISD::EXTLOAD, MVT::f32, Expand);
@@ -463,6 +465,43 @@ SDValue SITargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
                          Op.getOperand(3));
     }
   }
+
+  case ISD::INTRINSIC_VOID:
+    SDValue Chain = Op.getOperand(0);
+    unsigned IntrinsicID = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
+
+    switch (IntrinsicID) {
+      case AMDGPUIntrinsic::SI_tbuffer_store: {
+        SDLoc DL(Op);
+        SDValue Ops [] = {
+          Chain,
+          ResourceDescriptorToi128(Op.getOperand(2), DAG),
+          Op.getOperand(3),
+          Op.getOperand(4),
+          Op.getOperand(5),
+          Op.getOperand(6),
+          Op.getOperand(7),
+          Op.getOperand(8),
+          Op.getOperand(9),
+          Op.getOperand(10),
+          Op.getOperand(11),
+          Op.getOperand(12),
+          Op.getOperand(13),
+          Op.getOperand(14)
+        };
+        EVT VT = Op.getOperand(3).getValueType();
+
+        MachineMemOperand *MMO = MF.getMachineMemOperand(
+            MachinePointerInfo(),
+            MachineMemOperand::MOStore,
+            VT.getSizeInBits() / 8, 4);
+        return DAG.getMemIntrinsicNode(AMDGPUISD::TBUFFER_STORE_FORMAT, DL,
+                                       Op->getVTList(), Ops,
+                                       sizeof(Ops)/sizeof(Ops[0]), VT, MMO);
+      }
+      default:
+        break;
+    }
   }
   return SDValue();
 }
diff --git a/lib/Target/R600/SIInstrInfo.td b/lib/Target/R600/SIInstrInfo.td
index 09d5f01..e7d70f4 100644
--- a/lib/Target/R600/SIInstrInfo.td
+++ b/lib/Target/R600/SIInstrInfo.td
@@ -21,6 +21,25 @@ def SIload_constant : SDNode<"AMDGPUISD::LOAD_CONSTANT",
                       [SDNPMayLoad, SDNPMemOperand]
 >;
 
+def SItbuffer_store : SDNode<"AMDGPUISD::TBUFFER_STORE_FORMAT",
+  SDTypeProfile<0, 13,
+    [SDTCisVT<0, i128>,   // rsrc(SGPR)
+     SDTCisVT<1, iAny>,   // vdata(VGPR)
+     SDTCisVT<2, i32>,    // num_channels(imm)
+     SDTCisVT<3, i32>,    // vaddr(VGPR)
+     SDTCisVT<4, i32>,    // soffset(SGPR)
+     SDTCisVT<5, i32>,    // inst_offset(imm)
+     SDTCisVT<6, i32>,    // dfmt(imm)
+     SDTCisVT<7, i32>,    // nfmt(imm)
+     SDTCisVT<8, i32>,    // offen(imm)
+     SDTCisVT<9, i32>,    // idxen(imm)
+     SDTCisVT<10, i32>,   // glc(imm)
+     SDTCisVT<11, i32>,   // slc(imm)
+     SDTCisVT<12, i32>    // tfe(imm)
+    ]>,
+  [SDNPMayStore, SDNPMemOperand, SDNPHasChain]
+>;
+
 def SIload_input : SDNode<"AMDGPUISD::LOAD_INPUT",
   SDTypeProfile<1, 3, [SDTCisVT<0, v4f32>, SDTCisVT<1, i128>, SDTCisVT<2, i16>,
                        SDTCisVT<3, i32>]>
@@ -65,6 +84,14 @@ def IMM8bitDWORD : ImmLeaf <
   }]>
 >;
 
+def as_i1imm : SDNodeXForm<imm, [{
+  return CurDAG->getTargetConstant(N->getZExtValue(), MVT::i1);
+}]>;
+
+def as_i8imm : SDNodeXForm<imm, [{
+  return CurDAG->getTargetConstant(N->getZExtValue(), MVT::i8);
+}]>;
+
 def as_i16imm : SDNodeXForm<imm, [{
   return CurDAG->getTargetConstant(N->getSExtValue(), MVT::i16);
 }]>;
diff --git a/lib/Target/R600/SIInstructions.td b/lib/Target/R600/SIInstructions.td
index 14a189a..99fedcb 100644
--- a/lib/Target/R600/SIInstructions.td
+++ b/lib/Target/R600/SIInstructions.td
@@ -477,10 +477,10 @@ def BUFFER_STORE_DWORDX4 : MUBUF_Store_Helper <
 //def TBUFFER_LOAD_FORMAT_XY : MTBUF_ <0x00000001, "TBUFFER_LOAD_FORMAT_XY", []>;
 //def TBUFFER_LOAD_FORMAT_XYZ : MTBUF_ <0x00000002, "TBUFFER_LOAD_FORMAT_XYZ", []>;
 def TBUFFER_LOAD_FORMAT_XYZW : MTBUF_Load_Helper <0x00000003, "TBUFFER_LOAD_FORMAT_XYZW", VReg_128>;
-//def TBUFFER_STORE_FORMAT_X : MTBUF_ <0x00000004, "TBUFFER_STORE_FORMAT_X", []>;
-//def TBUFFER_STORE_FORMAT_XY : MTBUF_ <0x00000005, "TBUFFER_STORE_FORMAT_XY", []>;
-//def TBUFFER_STORE_FORMAT_XYZ : MTBUF_ <0x00000006, "TBUFFER_STORE_FORMAT_XYZ", []>;
-//def TBUFFER_STORE_FORMAT_XYZW : MTBUF_ <0x00000007, "TBUFFER_STORE_FORMAT_XYZW", []>;
+def TBUFFER_STORE_FORMAT_X : MTBUF_Store_Helper <0x00000004, "TBUFFER_STORE_FORMAT_X", VReg_32>;
+def TBUFFER_STORE_FORMAT_XY : MTBUF_Store_Helper <0x00000005, "TBUFFER_STORE_FORMAT_XY", VReg_64>;
+def TBUFFER_STORE_FORMAT_XYZ : MTBUF_Store_Helper <0x00000006, "TBUFFER_STORE_FORMAT_XYZ", VReg_128>;
+def TBUFFER_STORE_FORMAT_XYZW : MTBUF_Store_Helper <0x00000007, "TBUFFER_STORE_FORMAT_XYZW", VReg_128>;
 
 let mayLoad = 1 in {
 
@@ -1881,6 +1881,27 @@ defm : MUBUFStore_Pattern <BUFFER_STORE_DWORDX2, i64, global_store>;
 defm : MUBUFStore_Pattern <BUFFER_STORE_DWORDX2, v2i32, global_store>;
 defm : MUBUFStore_Pattern <BUFFER_STORE_DWORDX4, v4i32, global_store>;
 
+//===----------------------------------------------------------------------===//
+// MTBUF Patterns
+//===----------------------------------------------------------------------===//
+
+// TBUFFER_STORE_FORMAT_*, addr64=0
+class MTBUF_StoreResource <ValueType vt, int num_channels, MTBUF opcode> : Pat<
+  (SItbuffer_store i128:$rsrc, vt:$vdata, num_channels, i32:$vaddr,
+                   i32:$soffset, imm:$inst_offset, imm:$dfmt,
+                   imm:$nfmt, imm:$offen, imm:$idxen,
+                   imm:$glc, imm:$slc, imm:$tfe),
+  (opcode
+    $vdata, (as_i16imm $inst_offset), (as_i1imm $offen), (as_i1imm $idxen),
+    (as_i1imm $glc), 0, (as_i8imm $dfmt), (as_i8imm $nfmt), $vaddr, $rsrc,
+    (as_i1imm $slc), (as_i1imm $tfe), $soffset)
+>;
+
+def : MTBUF_StoreResource <i32, 1, TBUFFER_STORE_FORMAT_X>;
+def : MTBUF_StoreResource <v2i32, 2, TBUFFER_STORE_FORMAT_XY>;
+def : MTBUF_StoreResource <v4i32, 3, TBUFFER_STORE_FORMAT_XYZ>;
+def : MTBUF_StoreResource <v4i32, 4, TBUFFER_STORE_FORMAT_XYZW>;
+
 /********** ====================== **********/
 /**********   Indirect adressing   **********/
 /********** ====================== **********/
diff --git a/lib/Target/R600/SIIntrinsics.td b/lib/Target/R600/SIIntrinsics.td
index d6e26ad..7fcc964 100644
--- a/lib/Target/R600/SIIntrinsics.td
+++ b/lib/Target/R600/SIIntrinsics.td
@@ -20,6 +20,24 @@ let TargetPrefix = "SI", isTarget = 1 in {
   def int_SI_load_const : Intrinsic <[llvm_float_ty], [llvm_anyint_ty, llvm_i32_ty], [IntrNoMem]>;
   def int_SI_vs_load_input : Intrinsic <[llvm_v4f32_ty], [llvm_anyint_ty, llvm_i16_ty, llvm_i32_ty], [IntrNoMem]> ;
 
+  // Fully-flexible TBUFFER_STORE_FORMAT_* except for the ADDR64 bit, which is not exposed
+  def int_SI_tbuffer_store : Intrinsic <
+    [],
+    [llvm_anyint_ty, // rsrc(SGPR)
+     llvm_anyint_ty, // vdata(VGPR), overloaded for types i32, v2i32, v4i32
+     llvm_i32_ty,    // num_channels(imm), selects opcode suffix: 1=X, 2=XY, 3=XYZ, 4=XYZW
+     llvm_i32_ty,    // vaddr(VGPR)
+     llvm_i32_ty,    // soffset(SGPR)
+     llvm_i32_ty,    // inst_offset(imm)
+     llvm_i32_ty,    // dfmt(imm)
+     llvm_i32_ty,    // nfmt(imm)
+     llvm_i32_ty,    // offen(imm)
+     llvm_i32_ty,    // idxen(imm)
+     llvm_i32_ty,    // glc(imm)
+     llvm_i32_ty,    // slc(imm)
+     llvm_i32_ty],   // tfe(imm)
+    []>;
+
   class Sample : Intrinsic <[llvm_v4f32_ty], [llvm_anyvector_ty, llvm_v32i8_ty, llvm_anyint_ty, llvm_i32_ty], [IntrNoMem]>;
 
   def int_SI_sample : Sample;