Mesa (master): radeon/llvm: Lower implicit parameters before ISel
Tom Stellard
tstellar at kemper.freedesktop.org
Thu Aug 16 16:02:23 UTC 2012
Module: Mesa
Branch: master
Commit: 5f82d1924831da7467bfe8025ca18e98b9548ca4
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=5f82d1924831da7467bfe8025ca18e98b9548ca4
Author: Tom Stellard <thomas.stellard at amd.com>
Date: Thu Aug 16 15:49:31 2012 +0000
radeon/llvm: Lower implicit parameters before ISel
---
src/gallium/drivers/radeon/R600ISelLowering.cpp | 86 ++++++++++-------------
src/gallium/drivers/radeon/R600ISelLowering.h | 7 ++-
src/gallium/drivers/radeon/R600Instructions.td | 18 -----
3 files changed, 42 insertions(+), 69 deletions(-)
diff --git a/src/gallium/drivers/radeon/R600ISelLowering.cpp b/src/gallium/drivers/radeon/R600ISelLowering.cpp
index 1f5f417..0a23be4 100644
--- a/src/gallium/drivers/radeon/R600ISelLowering.cpp
+++ b/src/gallium/drivers/radeon/R600ISelLowering.cpp
@@ -58,34 +58,6 @@ MachineBasicBlock * R600TargetLowering::EmitInstrWithCustomInserter(
switch (MI->getOpcode()) {
default: return AMDGPUTargetLowering::EmitInstrWithCustomInserter(MI, BB);
- case AMDGPU::NGROUPS_X:
- lowerImplicitParameter(MI, *BB, MRI, 0);
- break;
- case AMDGPU::NGROUPS_Y:
- lowerImplicitParameter(MI, *BB, MRI, 1);
- break;
- case AMDGPU::NGROUPS_Z:
- lowerImplicitParameter(MI, *BB, MRI, 2);
- break;
- case AMDGPU::GLOBAL_SIZE_X:
- lowerImplicitParameter(MI, *BB, MRI, 3);
- break;
- case AMDGPU::GLOBAL_SIZE_Y:
- lowerImplicitParameter(MI, *BB, MRI, 4);
- break;
- case AMDGPU::GLOBAL_SIZE_Z:
- lowerImplicitParameter(MI, *BB, MRI, 5);
- break;
- case AMDGPU::LOCAL_SIZE_X:
- lowerImplicitParameter(MI, *BB, MRI, 6);
- break;
- case AMDGPU::LOCAL_SIZE_Y:
- lowerImplicitParameter(MI, *BB, MRI, 7);
- break;
- case AMDGPU::LOCAL_SIZE_Z:
- lowerImplicitParameter(MI, *BB, MRI, 8);
- break;
-
case AMDGPU::CLAMP_R600:
MI->getOperand(0).addTargetFlag(MO_FLAG_CLAMP);
BuildMI(*BB, I, BB->findDebugLoc(I), TII->get(AMDGPU::MOV))
@@ -245,27 +217,6 @@ MachineBasicBlock * R600TargetLowering::EmitInstrWithCustomInserter(
return BB;
}
-void R600TargetLowering::lowerImplicitParameter(MachineInstr *MI, MachineBasicBlock &BB,
- MachineRegisterInfo & MRI, unsigned dword_offset) const
-{
- unsigned ByteOffset = dword_offset * 4;
-
- // We shouldn't be using an offset wider than 16-bits for implicit parameters.
- assert(isInt<16>(ByteOffset));
-
- MachineBasicBlock::iterator I = *MI;
- unsigned PtrReg = MRI.createVirtualRegister(&AMDGPU::R600_TReg32_XRegClass);
- MRI.setRegClass(MI->getOperand(0).getReg(), &AMDGPU::R600_TReg32_XRegClass);
-
- BuildMI(BB, I, BB.findDebugLoc(I), TII->get(AMDGPU::COPY), PtrReg)
- .addReg(AMDGPU::ZERO);
-
- BuildMI(BB, I, BB.findDebugLoc(I), TII->get(AMDGPU::VTX_READ_PARAM_i32_eg))
- .addOperand(MI->getOperand(0))
- .addReg(PtrReg)
- .addImm(ByteOffset);
-}
-
//===----------------------------------------------------------------------===//
// Custom DAG Lowering Operations
//===----------------------------------------------------------------------===//
@@ -306,6 +257,7 @@ SDValue R600TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const
unsigned IntrinsicID =
cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
EVT VT = Op.getValueType();
+ DebugLoc DL = Op.getDebugLoc();
switch(IntrinsicID) {
default: return AMDGPUTargetLowering::LowerOperation(Op, DAG);
case AMDGPUIntrinsic::R600_load_input: {
@@ -313,6 +265,26 @@ SDValue R600TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const
unsigned Reg = AMDGPU::R600_TReg32RegClass.getRegister(RegIndex);
return CreateLiveInRegister(DAG, &AMDGPU::R600_TReg32RegClass, Reg, VT);
}
+
+ case r600_read_ngroups_x:
+ return LowerImplicitParameter(DAG, VT, DL, 0);
+ case r600_read_ngroups_y:
+ return LowerImplicitParameter(DAG, VT, DL, 1);
+ case r600_read_ngroups_z:
+ return LowerImplicitParameter(DAG, VT, DL, 2);
+ case r600_read_global_size_x:
+ return LowerImplicitParameter(DAG, VT, DL, 3);
+ case r600_read_global_size_y:
+ return LowerImplicitParameter(DAG, VT, DL, 4);
+ case r600_read_global_size_z:
+ return LowerImplicitParameter(DAG, VT, DL, 5);
+ case r600_read_local_size_x:
+ return LowerImplicitParameter(DAG, VT, DL, 6);
+ case r600_read_local_size_y:
+ return LowerImplicitParameter(DAG, VT, DL, 7);
+ case r600_read_local_size_z:
+ return LowerImplicitParameter(DAG, VT, DL, 8);
+
case r600_read_tgid_x:
return CreateLiveInRegister(DAG, &AMDGPU::R600_TReg32RegClass,
AMDGPU::T1_X, VT);
@@ -364,6 +336,22 @@ SDValue R600TargetLowering::LowerBR_CC(SDValue Op, SelectionDAG &DAG) const
return Result;
}
+SDValue R600TargetLowering::LowerImplicitParameter(SelectionDAG &DAG, EVT VT,
+ DebugLoc DL,
+ unsigned DwordOffset) const
+{
+ unsigned ByteOffset = DwordOffset * 4;
+ PointerType * PtrType = PointerType::get(VT.getTypeForEVT(*DAG.getContext()),
+ AMDGPUAS::PARAM_I_ADDRESS);
+
+ // We shouldn't be using an offset wider than 16-bits for implicit parameters.
+ assert(isInt<16>(ByteOffset));
+
+ return DAG.getLoad(VT, DL, DAG.getEntryNode(),
+ DAG.getConstant(ByteOffset, MVT::i32), // PTR
+ MachinePointerInfo(ConstantPointerNull::get(PtrType)),
+ false, false, false, 0);
+}
SDValue R600TargetLowering::LowerROTL(SDValue Op, SelectionDAG &DAG) const
{
diff --git a/src/gallium/drivers/radeon/R600ISelLowering.h b/src/gallium/drivers/radeon/R600ISelLowering.h
index f57ee97..2eb7edd 100644
--- a/src/gallium/drivers/radeon/R600ISelLowering.h
+++ b/src/gallium/drivers/radeon/R600ISelLowering.h
@@ -33,8 +33,11 @@ private:
/// lowerImplicitParameter - Each OpenCL kernel has nine implicit parameters
/// that are stored in the first nine dwords of a Vertex Buffer. These
- /// implicit parameters are represented by pseudo instructions, which are
- /// lowered to VTX_READ instructions by this function.
+ /// implicit parameters are lowered to load instructions which retreive the
+ /// values from the Vertex Buffer.
+ SDValue LowerImplicitParameter(SelectionDAG &DAG, EVT VT,
+ DebugLoc DL, unsigned DwordOffset) const;
+
void lowerImplicitParameter(MachineInstr *MI, MachineBasicBlock &BB,
MachineRegisterInfo & MRI, unsigned dword_offset) const;
diff --git a/src/gallium/drivers/radeon/R600Instructions.td b/src/gallium/drivers/radeon/R600Instructions.td
index 1819742..f8d2bb0 100644
--- a/src/gallium/drivers/radeon/R600Instructions.td
+++ b/src/gallium/drivers/radeon/R600Instructions.td
@@ -1133,24 +1133,6 @@ class R600PreloadInst <string asm, Intrinsic intr> : AMDGPUInst <
[(set R600_TReg32:$dst, (intr))]
>;
-def NGROUPS_X : R600PreloadInst <"NGROUPS_X", int_r600_read_ngroups_x>;
-def NGROUPS_Y : R600PreloadInst <"NGROUPS_Y", int_r600_read_ngroups_y>;
-def NGROUPS_Z : R600PreloadInst <"NGROUPS_Z", int_r600_read_ngroups_z>;
-
-def GLOBAL_SIZE_X : R600PreloadInst <"GLOBAL_SIZE_X",
- int_r600_read_global_size_x>;
-def GLOBAL_SIZE_Y : R600PreloadInst <"GLOBAL_SIZE_Y",
- int_r600_read_global_size_y>;
-def GLOBAL_SIZE_Z : R600PreloadInst <"GLOBAL_SIZE_Z",
- int_r600_read_global_size_z>;
-
-def LOCAL_SIZE_X : R600PreloadInst <"LOCAL_SIZE_X",
- int_r600_read_local_size_x>;
-def LOCAL_SIZE_Y : R600PreloadInst <"LOCAL_SIZE_Y",
- int_r600_read_local_size_y>;
-def LOCAL_SIZE_Z : R600PreloadInst <"LOCAL_SIZE_Z",
- int_r600_read_local_size_z>;
-
def R600_LOAD_CONST : AMDGPUShaderInst <
(outs R600_Reg32:$dst),
(ins i32imm:$src0),
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