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R600: Add new intrinsic to read work dimensions

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v2: Add SI lowering
    Add test

v3: Place work dimensions after the kernel arguments.
v4: Calculate offset while lowering arguments
v5: rebase
v6: change prefix to AMDGPU

Reviewed-by: Tom Stellard <tom@stellard.net>
Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219705 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jan Vesely 2014-10-14 18:52:07 +00:00
parent 787e3ca6a4
commit 6a529850f3
5 changed files with 44 additions and 6 deletions
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9
include/llvm/IR/IntrinsicsR600.td
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@ -33,10 +33,14 @@ defm int_r600_read_tgid : R600ReadPreloadRegisterIntrinsic_xyz <
"__builtin_r600_read_tgid">;
defm int_r600_read_tidig : R600ReadPreloadRegisterIntrinsic_xyz <
"__builtin_r600_read_tidig">;
} // End TargetPrefix = "r600"
let TargetPrefix = "AMDGPU" in {
class AMDGPUReadPreloadRegisterIntrinsic<string name>
: Intrinsic<[llvm_i32_ty], [], [IntrNoMem]>,
GCCBuiltin<name>;
def int_AMDGPU_div_scale : GCCBuiltin<"__builtin_amdgpu_div_scale">,
// 1st parameter: Numerator
// 2nd parameter: Denominator
@ -72,4 +76,7 @@ def int_AMDGPU_rsq_clamped : GCCBuiltin<"__builtin_amdgpu_rsq_clamped">,
def int_AMDGPU_ldexp : GCCBuiltin<"__builtin_amdgpu_ldexp">,
Intrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>, llvm_i32_ty], [IntrNoMem]>;
def int_AMDGPU_read_workdim : AMDGPUReadPreloadRegisterIntrinsic <
"__builtin_amdgpu_read_workdim">;
} // End TargetPrefix = "AMDGPU"

3
lib/Target/R600/AMDGPUMachineFunction.h
View File

@ -30,6 +30,9 @@ public:
/// Number of bytes in the LDS that are being used.
unsigned LDSSize;
/// Start of implicit kernel args
unsigned ABIArgOffset;
unsigned getShaderType() const {
return ShaderType;
}

11
lib/Target/R600/R600ISelLowering.cpp
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@ -809,6 +809,9 @@ SDValue R600TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const
case Intrinsic::r600_read_local_size_z:
return LowerImplicitParameter(DAG, VT, DL, 8);
case Intrinsic::AMDGPU_read_workdim:
return LowerImplicitParameter(DAG, VT, DL, MFI->ABIArgOffset / 4);
case Intrinsic::r600_read_tgid_x:
return CreateLiveInRegister(DAG, &AMDGPU::R600_TReg32RegClass,
AMDGPU::T1_X, VT);
@ -1698,7 +1701,7 @@ SDValue R600TargetLowering::LowerFormalArguments(
CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), ArgLocs,
*DAG.getContext());
MachineFunction &MF = DAG.getMachineFunction();
unsigned ShaderType = MF.getInfo<R600MachineFunctionInfo>()->getShaderType();
R600MachineFunctionInfo *MFI = MF.getInfo<R600MachineFunctionInfo>();
SmallVector<ISD::InputArg, 8> LocalIns;
@ -1716,7 +1719,7 @@ SDValue R600TargetLowering::LowerFormalArguments(
MemVT = MemVT.getVectorElementType();
}
if (ShaderType != ShaderType::COMPUTE) {
if (MFI->getShaderType() != ShaderType::COMPUTE) {
unsigned Reg = MF.addLiveIn(VA.getLocReg(), &AMDGPU::R600_Reg128RegClass);
SDValue Register = DAG.getCopyFromReg(Chain, DL, Reg, VT);
InVals.push_back(Register);
@ -1748,16 +1751,18 @@ SDValue R600TargetLowering::LowerFormalArguments(
unsigned ValBase = ArgLocs[In.OrigArgIndex].getLocMemOffset();
unsigned PartOffset = VA.getLocMemOffset();
unsigned Offset = 36 + VA.getLocMemOffset();
MachinePointerInfo PtrInfo(UndefValue::get(PtrTy), PartOffset - ValBase);
SDValue Arg = DAG.getLoad(ISD::UNINDEXED, Ext, VT, DL, Chain,
DAG.getConstant(36 + PartOffset, MVT::i32),
DAG.getConstant(Offset, MVT::i32),
DAG.getUNDEF(MVT::i32),
PtrInfo,
MemVT, false, true, true, 4);
// 4 is the preferred alignment for the CONSTANT memory space.
InVals.push_back(Arg);
MFI->ABIArgOffset = Offset + MemVT.getStoreSize();
}
return Chain;
}

11
lib/Target/R600/SIISelLowering.cpp
View File

@ -519,11 +519,11 @@ SDValue SITargetLowering::LowerFormalArguments(
if (VA.isMemLoc()) {
VT = Ins[i].VT;
EVT MemVT = Splits[i].VT;
const unsigned Offset = 36 + VA.getLocMemOffset();
// The first 36 bytes of the input buffer contains information about
// thread group and global sizes.
SDValue Arg = LowerParameter(DAG, VT, MemVT, DL, DAG.getRoot(),
36 + VA.getLocMemOffset(),
Ins[i].Flags.isSExt());
Offset, Ins[i].Flags.isSExt());
const PointerType *ParamTy =
dyn_cast<PointerType>(FType->getParamType(Ins[i].OrigArgIndex));
@ -537,6 +537,7 @@ SDValue SITargetLowering::LowerFormalArguments(
}
InVals.push_back(Arg);
Info->ABIArgOffset = Offset + MemVT.getStoreSize();
continue;
}
assert(VA.isRegLoc() && "Parameter must be in a register!");
@ -927,6 +928,12 @@ SDValue SITargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op,
case Intrinsic::r600_read_local_size_z:
return LowerParameter(DAG, VT, VT, DL, DAG.getEntryNode(),
SI::KernelInputOffsets::LOCAL_SIZE_Z, false);
case Intrinsic::AMDGPU_read_workdim:
return LowerParameter(DAG, VT, VT, DL, DAG.getEntryNode(),
MF.getInfo<SIMachineFunctionInfo>()->ABIArgOffset,
false);
case Intrinsic::r600_read_tgid_x:
return CreateLiveInRegister(DAG, &AMDGPU::SReg_32RegClass,
TRI->getPreloadedValue(MF, SIRegisterInfo::TGID_X), VT);

16
test/CodeGen/R600/work-item-intrinsics.ll
View File

@ -128,6 +128,20 @@ entry:
ret void
}
; FUNC-LABEL: @get_work_dim
; EG: MEM_RAT_CACHELESS STORE_RAW [[VAL:T[0-9]+\.X]]
; EG: MOV [[VAL]], KC0[2].Z
; SI: S_LOAD_DWORD [[VAL:s[0-9]+]], s[0:1], 0xb
; SI: V_MOV_B32_e32 [[VVAL:v[0-9]+]], [[VAL]]
; SI: BUFFER_STORE_DWORD [[VVAL]]
define void @get_work_dim (i32 addrspace(1)* %out) {
entry:
%0 = call i32 @llvm.r600.read.workdim() #0
store i32 %0, i32 addrspace(1)* %out
ret void
}
; The tgid values are stored in sgprs offset by the number of user sgprs.
; Currently we always use exactly 2 user sgprs for the pointer to the
; kernel arguments, but this may change in the future.
@ -209,4 +223,6 @@ declare i32 @llvm.r600.read.tidig.x() #0
declare i32 @llvm.r600.read.tidig.y() #0
declare i32 @llvm.r600.read.tidig.z() #0
declare i32 @llvm.r600.read.workdim() #0
attributes #0 = { readnone }