forked from OSchip/llvm-project
1358 lines
50 KiB
C++
1358 lines
50 KiB
C++
//===-- AMDGPUISelLowering.cpp - AMDGPU Common DAG lowering functions -----===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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/// \file
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/// \brief This is the parent TargetLowering class for hardware code gen
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/// targets.
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//
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//===----------------------------------------------------------------------===//
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#include "AMDGPUISelLowering.h"
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#include "AMDGPU.h"
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#include "AMDGPUFrameLowering.h"
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#include "AMDGPURegisterInfo.h"
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#include "AMDGPUSubtarget.h"
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#include "AMDILIntrinsicInfo.h"
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#include "R600MachineFunctionInfo.h"
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#include "SIMachineFunctionInfo.h"
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#include "llvm/Analysis/ValueTracking.h"
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#include "llvm/CodeGen/CallingConvLower.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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#include "llvm/CodeGen/SelectionDAG.h"
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#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
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#include "llvm/IR/DataLayout.h"
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#include "llvm/IR/DiagnosticInfo.h"
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#include "llvm/IR/DiagnosticPrinter.h"
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using namespace llvm;
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namespace {
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/// Diagnostic information for unimplemented or unsupported feature reporting.
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class DiagnosticInfoUnsupported : public DiagnosticInfo {
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private:
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const Twine &Description;
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const Function &Fn;
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static int KindID;
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static int getKindID() {
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if (KindID == 0)
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KindID = llvm::getNextAvailablePluginDiagnosticKind();
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return KindID;
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}
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public:
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DiagnosticInfoUnsupported(const Function &Fn, const Twine &Desc,
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DiagnosticSeverity Severity = DS_Error)
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: DiagnosticInfo(getKindID(), Severity),
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Description(Desc),
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Fn(Fn) { }
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const Function &getFunction() const { return Fn; }
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const Twine &getDescription() const { return Description; }
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void print(DiagnosticPrinter &DP) const override {
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DP << "unsupported " << getDescription() << " in " << Fn.getName();
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}
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static bool classof(const DiagnosticInfo *DI) {
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return DI->getKind() == getKindID();
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}
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};
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int DiagnosticInfoUnsupported::KindID = 0;
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}
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static bool allocateStack(unsigned ValNo, MVT ValVT, MVT LocVT,
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CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State) {
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unsigned Offset = State.AllocateStack(ValVT.getStoreSize(),
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ArgFlags.getOrigAlign());
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State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
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return true;
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}
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#include "AMDGPUGenCallingConv.inc"
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AMDGPUTargetLowering::AMDGPUTargetLowering(TargetMachine &TM) :
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TargetLowering(TM, new TargetLoweringObjectFileELF()) {
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Subtarget = &TM.getSubtarget<AMDGPUSubtarget>();
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// Initialize target lowering borrowed from AMDIL
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InitAMDILLowering();
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// We need to custom lower some of the intrinsics
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setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
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// Library functions. These default to Expand, but we have instructions
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// for them.
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setOperationAction(ISD::FCEIL, MVT::f32, Legal);
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setOperationAction(ISD::FEXP2, MVT::f32, Legal);
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setOperationAction(ISD::FPOW, MVT::f32, Legal);
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setOperationAction(ISD::FLOG2, MVT::f32, Legal);
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setOperationAction(ISD::FABS, MVT::f32, Legal);
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setOperationAction(ISD::FFLOOR, MVT::f32, Legal);
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setOperationAction(ISD::FRINT, MVT::f32, Legal);
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setOperationAction(ISD::FROUND, MVT::f32, Legal);
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setOperationAction(ISD::FTRUNC, MVT::f32, Legal);
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// The hardware supports ROTR, but not ROTL
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setOperationAction(ISD::ROTL, MVT::i32, Expand);
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// Lower floating point store/load to integer store/load to reduce the number
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// of patterns in tablegen.
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setOperationAction(ISD::STORE, MVT::f32, Promote);
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AddPromotedToType(ISD::STORE, MVT::f32, MVT::i32);
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setOperationAction(ISD::STORE, MVT::v2f32, Promote);
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AddPromotedToType(ISD::STORE, MVT::v2f32, MVT::v2i32);
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setOperationAction(ISD::STORE, MVT::v4f32, Promote);
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AddPromotedToType(ISD::STORE, MVT::v4f32, MVT::v4i32);
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setOperationAction(ISD::STORE, MVT::v8f32, Promote);
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AddPromotedToType(ISD::STORE, MVT::v8f32, MVT::v8i32);
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setOperationAction(ISD::STORE, MVT::v16f32, Promote);
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AddPromotedToType(ISD::STORE, MVT::v16f32, MVT::v16i32);
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setOperationAction(ISD::STORE, MVT::f64, Promote);
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AddPromotedToType(ISD::STORE, MVT::f64, MVT::i64);
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// Custom lowering of vector stores is required for local address space
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// stores.
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setOperationAction(ISD::STORE, MVT::v4i32, Custom);
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// XXX: Native v2i32 local address space stores are possible, but not
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// currently implemented.
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setOperationAction(ISD::STORE, MVT::v2i32, Custom);
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setTruncStoreAction(MVT::v2i32, MVT::v2i16, Custom);
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setTruncStoreAction(MVT::v2i32, MVT::v2i8, Custom);
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setTruncStoreAction(MVT::v4i32, MVT::v4i8, Custom);
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// XXX: This can be change to Custom, once ExpandVectorStores can
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// handle 64-bit stores.
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setTruncStoreAction(MVT::v4i32, MVT::v4i16, Expand);
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setTruncStoreAction(MVT::i64, MVT::i1, Expand);
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setTruncStoreAction(MVT::v2i64, MVT::v2i1, Expand);
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setTruncStoreAction(MVT::v4i64, MVT::v4i1, Expand);
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setOperationAction(ISD::LOAD, MVT::f32, Promote);
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AddPromotedToType(ISD::LOAD, MVT::f32, MVT::i32);
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setOperationAction(ISD::LOAD, MVT::v2f32, Promote);
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AddPromotedToType(ISD::LOAD, MVT::v2f32, MVT::v2i32);
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setOperationAction(ISD::LOAD, MVT::v4f32, Promote);
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AddPromotedToType(ISD::LOAD, MVT::v4f32, MVT::v4i32);
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setOperationAction(ISD::LOAD, MVT::v8f32, Promote);
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AddPromotedToType(ISD::LOAD, MVT::v8f32, MVT::v8i32);
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setOperationAction(ISD::LOAD, MVT::v16f32, Promote);
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AddPromotedToType(ISD::LOAD, MVT::v16f32, MVT::v16i32);
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setOperationAction(ISD::LOAD, MVT::f64, Promote);
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AddPromotedToType(ISD::LOAD, MVT::f64, MVT::i64);
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setOperationAction(ISD::CONCAT_VECTORS, MVT::v4i32, Custom);
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setOperationAction(ISD::CONCAT_VECTORS, MVT::v4f32, Custom);
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setOperationAction(ISD::CONCAT_VECTORS, MVT::v8i32, Custom);
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setOperationAction(ISD::CONCAT_VECTORS, MVT::v8f32, Custom);
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setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v2f32, Custom);
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setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v2i32, Custom);
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setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v4f32, Custom);
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setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v4i32, Custom);
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setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v8f32, Custom);
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setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v8i32, Custom);
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setLoadExtAction(ISD::EXTLOAD, MVT::v2i8, Expand);
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setLoadExtAction(ISD::SEXTLOAD, MVT::v2i8, Expand);
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setLoadExtAction(ISD::ZEXTLOAD, MVT::v2i8, Expand);
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setLoadExtAction(ISD::EXTLOAD, MVT::v4i8, Expand);
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setLoadExtAction(ISD::SEXTLOAD, MVT::v4i8, Expand);
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setLoadExtAction(ISD::ZEXTLOAD, MVT::v4i8, Expand);
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setLoadExtAction(ISD::EXTLOAD, MVT::v2i16, Expand);
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setLoadExtAction(ISD::SEXTLOAD, MVT::v2i16, Expand);
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setLoadExtAction(ISD::ZEXTLOAD, MVT::v2i16, Expand);
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setLoadExtAction(ISD::EXTLOAD, MVT::v4i16, Expand);
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setLoadExtAction(ISD::SEXTLOAD, MVT::v4i16, Expand);
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setLoadExtAction(ISD::ZEXTLOAD, MVT::v4i16, Expand);
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setOperationAction(ISD::BR_CC, MVT::i1, Expand);
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setOperationAction(ISD::FNEG, MVT::v2f32, Expand);
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setOperationAction(ISD::FNEG, MVT::v4f32, Expand);
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setOperationAction(ISD::UINT_TO_FP, MVT::i64, Custom);
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setOperationAction(ISD::MUL, MVT::i64, Expand);
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setOperationAction(ISD::UDIV, MVT::i32, Expand);
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setOperationAction(ISD::UDIVREM, MVT::i32, Custom);
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setOperationAction(ISD::UREM, MVT::i32, Expand);
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setOperationAction(ISD::VSELECT, MVT::v2f32, Expand);
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setOperationAction(ISD::VSELECT, MVT::v4f32, Expand);
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static const MVT::SimpleValueType IntTypes[] = {
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MVT::v2i32, MVT::v4i32
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};
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const size_t NumIntTypes = array_lengthof(IntTypes);
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for (unsigned int x = 0; x < NumIntTypes; ++x) {
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MVT::SimpleValueType VT = IntTypes[x];
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//Expand the following operations for the current type by default
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setOperationAction(ISD::ADD, VT, Expand);
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setOperationAction(ISD::AND, VT, Expand);
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setOperationAction(ISD::FP_TO_SINT, VT, Expand);
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setOperationAction(ISD::FP_TO_UINT, VT, Expand);
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setOperationAction(ISD::MUL, VT, Expand);
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setOperationAction(ISD::OR, VT, Expand);
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setOperationAction(ISD::SHL, VT, Expand);
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setOperationAction(ISD::SINT_TO_FP, VT, Expand);
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setOperationAction(ISD::SRL, VT, Expand);
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setOperationAction(ISD::SRA, VT, Expand);
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setOperationAction(ISD::SUB, VT, Expand);
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setOperationAction(ISD::UDIV, VT, Expand);
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setOperationAction(ISD::UINT_TO_FP, VT, Expand);
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setOperationAction(ISD::UREM, VT, Expand);
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setOperationAction(ISD::SELECT, VT, Expand);
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setOperationAction(ISD::VSELECT, VT, Expand);
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setOperationAction(ISD::XOR, VT, Expand);
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}
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static const MVT::SimpleValueType FloatTypes[] = {
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MVT::v2f32, MVT::v4f32
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};
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const size_t NumFloatTypes = array_lengthof(FloatTypes);
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for (unsigned int x = 0; x < NumFloatTypes; ++x) {
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MVT::SimpleValueType VT = FloatTypes[x];
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setOperationAction(ISD::FABS, VT, Expand);
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setOperationAction(ISD::FADD, VT, Expand);
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setOperationAction(ISD::FDIV, VT, Expand);
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setOperationAction(ISD::FPOW, VT, Expand);
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setOperationAction(ISD::FFLOOR, VT, Expand);
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setOperationAction(ISD::FTRUNC, VT, Expand);
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setOperationAction(ISD::FMUL, VT, Expand);
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setOperationAction(ISD::FRINT, VT, Expand);
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setOperationAction(ISD::FSQRT, VT, Expand);
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setOperationAction(ISD::FSUB, VT, Expand);
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setOperationAction(ISD::SELECT, VT, Expand);
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}
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setTargetDAGCombine(ISD::MUL);
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}
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//===----------------------------------------------------------------------===//
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// Target Information
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//===----------------------------------------------------------------------===//
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MVT AMDGPUTargetLowering::getVectorIdxTy() const {
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return MVT::i32;
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}
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bool AMDGPUTargetLowering::isLoadBitCastBeneficial(EVT LoadTy,
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EVT CastTy) const {
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if (LoadTy.getSizeInBits() != CastTy.getSizeInBits())
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return true;
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unsigned LScalarSize = LoadTy.getScalarType().getSizeInBits();
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unsigned CastScalarSize = CastTy.getScalarType().getSizeInBits();
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return ((LScalarSize <= CastScalarSize) ||
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(CastScalarSize >= 32) ||
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(LScalarSize < 32));
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}
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//===---------------------------------------------------------------------===//
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// Target Properties
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//===---------------------------------------------------------------------===//
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bool AMDGPUTargetLowering::isFAbsFree(EVT VT) const {
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assert(VT.isFloatingPoint());
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return VT == MVT::f32;
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}
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bool AMDGPUTargetLowering::isFNegFree(EVT VT) const {
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assert(VT.isFloatingPoint());
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return VT == MVT::f32;
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}
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bool AMDGPUTargetLowering::isTruncateFree(EVT Source, EVT Dest) const {
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// Truncate is just accessing a subregister.
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return Dest.bitsLT(Source) && (Dest.getSizeInBits() % 32 == 0);
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}
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bool AMDGPUTargetLowering::isTruncateFree(Type *Source, Type *Dest) const {
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// Truncate is just accessing a subregister.
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return Dest->getPrimitiveSizeInBits() < Source->getPrimitiveSizeInBits() &&
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(Dest->getPrimitiveSizeInBits() % 32 == 0);
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}
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bool AMDGPUTargetLowering::isZExtFree(Type *Src, Type *Dest) const {
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const DataLayout *DL = getDataLayout();
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unsigned SrcSize = DL->getTypeSizeInBits(Src->getScalarType());
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unsigned DestSize = DL->getTypeSizeInBits(Dest->getScalarType());
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return SrcSize == 32 && DestSize == 64;
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}
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bool AMDGPUTargetLowering::isZExtFree(EVT Src, EVT Dest) const {
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// Any register load of a 64-bit value really requires 2 32-bit moves. For all
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// practical purposes, the extra mov 0 to load a 64-bit is free. As used,
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// this will enable reducing 64-bit operations the 32-bit, which is always
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// good.
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return Src == MVT::i32 && Dest == MVT::i64;
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}
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bool AMDGPUTargetLowering::isNarrowingProfitable(EVT SrcVT, EVT DestVT) const {
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// There aren't really 64-bit registers, but pairs of 32-bit ones and only a
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// limited number of native 64-bit operations. Shrinking an operation to fit
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// in a single 32-bit register should always be helpful. As currently used,
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// this is much less general than the name suggests, and is only used in
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// places trying to reduce the sizes of loads. Shrinking loads to < 32-bits is
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// not profitable, and may actually be harmful.
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return SrcVT.getSizeInBits() > 32 && DestVT.getSizeInBits() == 32;
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}
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//===---------------------------------------------------------------------===//
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// TargetLowering Callbacks
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//===---------------------------------------------------------------------===//
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void AMDGPUTargetLowering::AnalyzeFormalArguments(CCState &State,
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const SmallVectorImpl<ISD::InputArg> &Ins) const {
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State.AnalyzeFormalArguments(Ins, CC_AMDGPU);
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}
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SDValue AMDGPUTargetLowering::LowerReturn(
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SDValue Chain,
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CallingConv::ID CallConv,
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bool isVarArg,
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const SmallVectorImpl<ISD::OutputArg> &Outs,
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const SmallVectorImpl<SDValue> &OutVals,
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SDLoc DL, SelectionDAG &DAG) const {
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return DAG.getNode(AMDGPUISD::RET_FLAG, DL, MVT::Other, Chain);
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}
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//===---------------------------------------------------------------------===//
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// Target specific lowering
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//===---------------------------------------------------------------------===//
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SDValue AMDGPUTargetLowering::LowerCall(CallLoweringInfo &CLI,
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SmallVectorImpl<SDValue> &InVals) const {
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SDValue Callee = CLI.Callee;
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SelectionDAG &DAG = CLI.DAG;
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const Function &Fn = *DAG.getMachineFunction().getFunction();
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StringRef FuncName("<unknown>");
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if (const ExternalSymbolSDNode *G = dyn_cast<ExternalSymbolSDNode>(Callee))
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FuncName = G->getSymbol();
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else if (const GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
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FuncName = G->getGlobal()->getName();
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DiagnosticInfoUnsupported NoCalls(Fn, "call to function " + FuncName);
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DAG.getContext()->diagnose(NoCalls);
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return SDValue();
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}
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SDValue AMDGPUTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG)
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const {
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switch (Op.getOpcode()) {
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default:
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Op.getNode()->dump();
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llvm_unreachable("Custom lowering code for this"
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"instruction is not implemented yet!");
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break;
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// AMDIL DAG lowering
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case ISD::SDIV: return LowerSDIV(Op, DAG);
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case ISD::SREM: return LowerSREM(Op, DAG);
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case ISD::SIGN_EXTEND_INREG: return LowerSIGN_EXTEND_INREG(Op, DAG);
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case ISD::BRCOND: return LowerBRCOND(Op, DAG);
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// AMDGPU DAG lowering
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case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
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case ISD::EXTRACT_SUBVECTOR: return LowerEXTRACT_SUBVECTOR(Op, DAG);
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case ISD::FrameIndex: return LowerFrameIndex(Op, DAG);
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case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
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case ISD::UDIVREM: return LowerUDIVREM(Op, DAG);
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case ISD::UINT_TO_FP: return LowerUINT_TO_FP(Op, DAG);
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}
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return Op;
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}
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void AMDGPUTargetLowering::ReplaceNodeResults(SDNode *N,
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SmallVectorImpl<SDValue> &Results,
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SelectionDAG &DAG) const {
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switch (N->getOpcode()) {
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case ISD::SIGN_EXTEND_INREG:
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// Different parts of legalization seem to interpret which type of
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// sign_extend_inreg is the one to check for custom lowering. The extended
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// from type is what really matters, but some places check for custom
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// lowering of the result type. This results in trying to use
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// ReplaceNodeResults to sext_in_reg to an illegal type, so we'll just do
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// nothing here and let the illegal result integer be handled normally.
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return;
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default:
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return;
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}
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}
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SDValue AMDGPUTargetLowering::LowerConstantInitializer(const Constant* Init,
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const GlobalValue *GV,
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const SDValue &InitPtr,
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SDValue Chain,
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SelectionDAG &DAG) const {
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const DataLayout *TD = getTargetMachine().getDataLayout();
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SDLoc DL(InitPtr);
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if (const ConstantInt *CI = dyn_cast<ConstantInt>(Init)) {
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EVT VT = EVT::getEVT(CI->getType());
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PointerType *PtrTy = PointerType::get(CI->getType(), 0);
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return DAG.getStore(Chain, DL, DAG.getConstant(*CI, VT), InitPtr,
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MachinePointerInfo(UndefValue::get(PtrTy)), false, false,
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TD->getPrefTypeAlignment(CI->getType()));
|
|
} else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(Init)) {
|
|
EVT VT = EVT::getEVT(CFP->getType());
|
|
PointerType *PtrTy = PointerType::get(CFP->getType(), 0);
|
|
return DAG.getStore(Chain, DL, DAG.getConstantFP(*CFP, VT), InitPtr,
|
|
MachinePointerInfo(UndefValue::get(PtrTy)), false, false,
|
|
TD->getPrefTypeAlignment(CFP->getType()));
|
|
} else if (Init->getType()->isAggregateType()) {
|
|
EVT PtrVT = InitPtr.getValueType();
|
|
unsigned NumElements = Init->getType()->getArrayNumElements();
|
|
SmallVector<SDValue, 8> Chains;
|
|
for (unsigned i = 0; i < NumElements; ++i) {
|
|
SDValue Offset = DAG.getConstant(i * TD->getTypeAllocSize(
|
|
Init->getType()->getArrayElementType()), PtrVT);
|
|
SDValue Ptr = DAG.getNode(ISD::ADD, DL, PtrVT, InitPtr, Offset);
|
|
Chains.push_back(LowerConstantInitializer(Init->getAggregateElement(i),
|
|
GV, Ptr, Chain, DAG));
|
|
}
|
|
return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Chains);
|
|
} else {
|
|
Init->dump();
|
|
llvm_unreachable("Unhandled constant initializer");
|
|
}
|
|
}
|
|
|
|
SDValue AMDGPUTargetLowering::LowerGlobalAddress(AMDGPUMachineFunction* MFI,
|
|
SDValue Op,
|
|
SelectionDAG &DAG) const {
|
|
|
|
const DataLayout *TD = getTargetMachine().getDataLayout();
|
|
GlobalAddressSDNode *G = cast<GlobalAddressSDNode>(Op);
|
|
const GlobalValue *GV = G->getGlobal();
|
|
|
|
switch (G->getAddressSpace()) {
|
|
default: llvm_unreachable("Global Address lowering not implemented for this "
|
|
"address space");
|
|
case AMDGPUAS::LOCAL_ADDRESS: {
|
|
// XXX: What does the value of G->getOffset() mean?
|
|
assert(G->getOffset() == 0 &&
|
|
"Do not know what to do with an non-zero offset");
|
|
|
|
unsigned Offset;
|
|
if (MFI->LocalMemoryObjects.count(GV) == 0) {
|
|
uint64_t Size = TD->getTypeAllocSize(GV->getType()->getElementType());
|
|
Offset = MFI->LDSSize;
|
|
MFI->LocalMemoryObjects[GV] = Offset;
|
|
// XXX: Account for alignment?
|
|
MFI->LDSSize += Size;
|
|
} else {
|
|
Offset = MFI->LocalMemoryObjects[GV];
|
|
}
|
|
|
|
return DAG.getConstant(Offset, getPointerTy(G->getAddressSpace()));
|
|
}
|
|
case AMDGPUAS::CONSTANT_ADDRESS: {
|
|
MachineFrameInfo *FrameInfo = DAG.getMachineFunction().getFrameInfo();
|
|
Type *EltType = GV->getType()->getElementType();
|
|
unsigned Size = TD->getTypeAllocSize(EltType);
|
|
unsigned Alignment = TD->getPrefTypeAlignment(EltType);
|
|
|
|
const GlobalVariable *Var = dyn_cast<GlobalVariable>(GV);
|
|
const Constant *Init = Var->getInitializer();
|
|
int FI = FrameInfo->CreateStackObject(Size, Alignment, false);
|
|
SDValue InitPtr = DAG.getFrameIndex(FI,
|
|
getPointerTy(AMDGPUAS::PRIVATE_ADDRESS));
|
|
SmallVector<SDNode*, 8> WorkList;
|
|
|
|
for (SDNode::use_iterator I = DAG.getEntryNode()->use_begin(),
|
|
E = DAG.getEntryNode()->use_end(); I != E; ++I) {
|
|
if (I->getOpcode() != AMDGPUISD::REGISTER_LOAD && I->getOpcode() != ISD::LOAD)
|
|
continue;
|
|
WorkList.push_back(*I);
|
|
}
|
|
SDValue Chain = LowerConstantInitializer(Init, GV, InitPtr, DAG.getEntryNode(), DAG);
|
|
for (SmallVector<SDNode*, 8>::iterator I = WorkList.begin(),
|
|
E = WorkList.end(); I != E; ++I) {
|
|
SmallVector<SDValue, 8> Ops;
|
|
Ops.push_back(Chain);
|
|
for (unsigned i = 1; i < (*I)->getNumOperands(); ++i) {
|
|
Ops.push_back((*I)->getOperand(i));
|
|
}
|
|
DAG.UpdateNodeOperands(*I, Ops);
|
|
}
|
|
return DAG.getZExtOrTrunc(InitPtr, SDLoc(Op),
|
|
getPointerTy(AMDGPUAS::CONSTANT_ADDRESS));
|
|
}
|
|
}
|
|
}
|
|
|
|
SDValue AMDGPUTargetLowering::LowerCONCAT_VECTORS(SDValue Op,
|
|
SelectionDAG &DAG) const {
|
|
SmallVector<SDValue, 8> Args;
|
|
SDValue A = Op.getOperand(0);
|
|
SDValue B = Op.getOperand(1);
|
|
|
|
DAG.ExtractVectorElements(A, Args);
|
|
DAG.ExtractVectorElements(B, Args);
|
|
|
|
return DAG.getNode(ISD::BUILD_VECTOR, SDLoc(Op), Op.getValueType(), Args);
|
|
}
|
|
|
|
SDValue AMDGPUTargetLowering::LowerEXTRACT_SUBVECTOR(SDValue Op,
|
|
SelectionDAG &DAG) const {
|
|
|
|
SmallVector<SDValue, 8> Args;
|
|
unsigned Start = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
|
|
EVT VT = Op.getValueType();
|
|
DAG.ExtractVectorElements(Op.getOperand(0), Args, Start,
|
|
VT.getVectorNumElements());
|
|
|
|
return DAG.getNode(ISD::BUILD_VECTOR, SDLoc(Op), Op.getValueType(), Args);
|
|
}
|
|
|
|
SDValue AMDGPUTargetLowering::LowerFrameIndex(SDValue Op,
|
|
SelectionDAG &DAG) const {
|
|
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
const AMDGPUFrameLowering *TFL =
|
|
static_cast<const AMDGPUFrameLowering*>(getTargetMachine().getFrameLowering());
|
|
|
|
FrameIndexSDNode *FIN = dyn_cast<FrameIndexSDNode>(Op);
|
|
assert(FIN);
|
|
|
|
unsigned FrameIndex = FIN->getIndex();
|
|
unsigned Offset = TFL->getFrameIndexOffset(MF, FrameIndex);
|
|
return DAG.getConstant(Offset * 4 * TFL->getStackWidth(MF),
|
|
Op.getValueType());
|
|
}
|
|
|
|
SDValue AMDGPUTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op,
|
|
SelectionDAG &DAG) const {
|
|
unsigned IntrinsicID = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
|
|
SDLoc DL(Op);
|
|
EVT VT = Op.getValueType();
|
|
|
|
switch (IntrinsicID) {
|
|
default: return Op;
|
|
case AMDGPUIntrinsic::AMDIL_abs:
|
|
return LowerIntrinsicIABS(Op, DAG);
|
|
case AMDGPUIntrinsic::AMDIL_exp:
|
|
return DAG.getNode(ISD::FEXP2, DL, VT, Op.getOperand(1));
|
|
case AMDGPUIntrinsic::AMDGPU_lrp:
|
|
return LowerIntrinsicLRP(Op, DAG);
|
|
case AMDGPUIntrinsic::AMDIL_fraction:
|
|
return DAG.getNode(AMDGPUISD::FRACT, DL, VT, Op.getOperand(1));
|
|
case AMDGPUIntrinsic::AMDIL_max:
|
|
return DAG.getNode(AMDGPUISD::FMAX, DL, VT, Op.getOperand(1),
|
|
Op.getOperand(2));
|
|
case AMDGPUIntrinsic::AMDGPU_imax:
|
|
return DAG.getNode(AMDGPUISD::SMAX, DL, VT, Op.getOperand(1),
|
|
Op.getOperand(2));
|
|
case AMDGPUIntrinsic::AMDGPU_umax:
|
|
return DAG.getNode(AMDGPUISD::UMAX, DL, VT, Op.getOperand(1),
|
|
Op.getOperand(2));
|
|
case AMDGPUIntrinsic::AMDIL_min:
|
|
return DAG.getNode(AMDGPUISD::FMIN, DL, VT, Op.getOperand(1),
|
|
Op.getOperand(2));
|
|
case AMDGPUIntrinsic::AMDGPU_imin:
|
|
return DAG.getNode(AMDGPUISD::SMIN, DL, VT, Op.getOperand(1),
|
|
Op.getOperand(2));
|
|
case AMDGPUIntrinsic::AMDGPU_umin:
|
|
return DAG.getNode(AMDGPUISD::UMIN, DL, VT, Op.getOperand(1),
|
|
Op.getOperand(2));
|
|
|
|
case AMDGPUIntrinsic::AMDGPU_bfe_i32:
|
|
return DAG.getNode(AMDGPUISD::BFE_I32, DL, VT,
|
|
Op.getOperand(1),
|
|
Op.getOperand(2),
|
|
Op.getOperand(3));
|
|
|
|
case AMDGPUIntrinsic::AMDGPU_bfe_u32:
|
|
return DAG.getNode(AMDGPUISD::BFE_U32, DL, VT,
|
|
Op.getOperand(1),
|
|
Op.getOperand(2),
|
|
Op.getOperand(3));
|
|
|
|
case AMDGPUIntrinsic::AMDGPU_bfi:
|
|
return DAG.getNode(AMDGPUISD::BFI, DL, VT,
|
|
Op.getOperand(1),
|
|
Op.getOperand(2),
|
|
Op.getOperand(3));
|
|
|
|
case AMDGPUIntrinsic::AMDGPU_bfm:
|
|
return DAG.getNode(AMDGPUISD::BFM, DL, VT,
|
|
Op.getOperand(1),
|
|
Op.getOperand(2));
|
|
|
|
case AMDGPUIntrinsic::AMDIL_round_nearest:
|
|
return DAG.getNode(ISD::FRINT, DL, VT, Op.getOperand(1));
|
|
}
|
|
}
|
|
|
|
///IABS(a) = SMAX(sub(0, a), a)
|
|
SDValue AMDGPUTargetLowering::LowerIntrinsicIABS(SDValue Op,
|
|
SelectionDAG &DAG) const {
|
|
|
|
SDLoc DL(Op);
|
|
EVT VT = Op.getValueType();
|
|
SDValue Neg = DAG.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, VT),
|
|
Op.getOperand(1));
|
|
|
|
return DAG.getNode(AMDGPUISD::SMAX, DL, VT, Neg, Op.getOperand(1));
|
|
}
|
|
|
|
/// Linear Interpolation
|
|
/// LRP(a, b, c) = muladd(a, b, (1 - a) * c)
|
|
SDValue AMDGPUTargetLowering::LowerIntrinsicLRP(SDValue Op,
|
|
SelectionDAG &DAG) const {
|
|
SDLoc DL(Op);
|
|
EVT VT = Op.getValueType();
|
|
SDValue OneSubA = DAG.getNode(ISD::FSUB, DL, VT,
|
|
DAG.getConstantFP(1.0f, MVT::f32),
|
|
Op.getOperand(1));
|
|
SDValue OneSubAC = DAG.getNode(ISD::FMUL, DL, VT, OneSubA,
|
|
Op.getOperand(3));
|
|
return DAG.getNode(ISD::FADD, DL, VT,
|
|
DAG.getNode(ISD::FMUL, DL, VT, Op.getOperand(1), Op.getOperand(2)),
|
|
OneSubAC);
|
|
}
|
|
|
|
/// \brief Generate Min/Max node
|
|
SDValue AMDGPUTargetLowering::LowerMinMax(SDValue Op,
|
|
SelectionDAG &DAG) const {
|
|
SDLoc DL(Op);
|
|
EVT VT = Op.getValueType();
|
|
|
|
SDValue LHS = Op.getOperand(0);
|
|
SDValue RHS = Op.getOperand(1);
|
|
SDValue True = Op.getOperand(2);
|
|
SDValue False = Op.getOperand(3);
|
|
SDValue CC = Op.getOperand(4);
|
|
|
|
if (VT != MVT::f32 ||
|
|
!((LHS == True && RHS == False) || (LHS == False && RHS == True))) {
|
|
return SDValue();
|
|
}
|
|
|
|
ISD::CondCode CCOpcode = cast<CondCodeSDNode>(CC)->get();
|
|
switch (CCOpcode) {
|
|
case ISD::SETOEQ:
|
|
case ISD::SETONE:
|
|
case ISD::SETUNE:
|
|
case ISD::SETNE:
|
|
case ISD::SETUEQ:
|
|
case ISD::SETEQ:
|
|
case ISD::SETFALSE:
|
|
case ISD::SETFALSE2:
|
|
case ISD::SETTRUE:
|
|
case ISD::SETTRUE2:
|
|
case ISD::SETUO:
|
|
case ISD::SETO:
|
|
llvm_unreachable("Operation should already be optimised!");
|
|
case ISD::SETULE:
|
|
case ISD::SETULT:
|
|
case ISD::SETOLE:
|
|
case ISD::SETOLT:
|
|
case ISD::SETLE:
|
|
case ISD::SETLT: {
|
|
if (LHS == True)
|
|
return DAG.getNode(AMDGPUISD::FMIN, DL, VT, LHS, RHS);
|
|
else
|
|
return DAG.getNode(AMDGPUISD::FMAX, DL, VT, LHS, RHS);
|
|
}
|
|
case ISD::SETGT:
|
|
case ISD::SETGE:
|
|
case ISD::SETUGE:
|
|
case ISD::SETOGE:
|
|
case ISD::SETUGT:
|
|
case ISD::SETOGT: {
|
|
if (LHS == True)
|
|
return DAG.getNode(AMDGPUISD::FMAX, DL, VT, LHS, RHS);
|
|
else
|
|
return DAG.getNode(AMDGPUISD::FMIN, DL, VT, LHS, RHS);
|
|
}
|
|
case ISD::SETCC_INVALID:
|
|
llvm_unreachable("Invalid setcc condcode!");
|
|
}
|
|
return Op;
|
|
}
|
|
|
|
SDValue AMDGPUTargetLowering::SplitVectorLoad(const SDValue &Op,
|
|
SelectionDAG &DAG) const {
|
|
LoadSDNode *Load = dyn_cast<LoadSDNode>(Op);
|
|
EVT MemEltVT = Load->getMemoryVT().getVectorElementType();
|
|
EVT EltVT = Op.getValueType().getVectorElementType();
|
|
EVT PtrVT = Load->getBasePtr().getValueType();
|
|
unsigned NumElts = Load->getMemoryVT().getVectorNumElements();
|
|
SmallVector<SDValue, 8> Loads;
|
|
SDLoc SL(Op);
|
|
|
|
for (unsigned i = 0, e = NumElts; i != e; ++i) {
|
|
SDValue Ptr = DAG.getNode(ISD::ADD, SL, PtrVT, Load->getBasePtr(),
|
|
DAG.getConstant(i * (MemEltVT.getSizeInBits() / 8), PtrVT));
|
|
Loads.push_back(DAG.getExtLoad(Load->getExtensionType(), SL, EltVT,
|
|
Load->getChain(), Ptr,
|
|
MachinePointerInfo(Load->getMemOperand()->getValue()),
|
|
MemEltVT, Load->isVolatile(), Load->isNonTemporal(),
|
|
Load->getAlignment()));
|
|
}
|
|
return DAG.getNode(ISD::BUILD_VECTOR, SL, Op.getValueType(), Loads);
|
|
}
|
|
|
|
SDValue AMDGPUTargetLowering::MergeVectorStore(const SDValue &Op,
|
|
SelectionDAG &DAG) const {
|
|
StoreSDNode *Store = dyn_cast<StoreSDNode>(Op);
|
|
EVT MemVT = Store->getMemoryVT();
|
|
unsigned MemBits = MemVT.getSizeInBits();
|
|
|
|
// Byte stores are really expensive, so if possible, try to pack 32-bit vector
|
|
// truncating store into an i32 store.
|
|
// XXX: We could also handle optimize other vector bitwidths.
|
|
if (!MemVT.isVector() || MemBits > 32) {
|
|
return SDValue();
|
|
}
|
|
|
|
SDLoc DL(Op);
|
|
SDValue Value = Store->getValue();
|
|
EVT VT = Value.getValueType();
|
|
EVT ElemVT = VT.getVectorElementType();
|
|
SDValue Ptr = Store->getBasePtr();
|
|
EVT MemEltVT = MemVT.getVectorElementType();
|
|
unsigned MemEltBits = MemEltVT.getSizeInBits();
|
|
unsigned MemNumElements = MemVT.getVectorNumElements();
|
|
unsigned PackedSize = MemVT.getStoreSizeInBits();
|
|
SDValue Mask = DAG.getConstant((1 << MemEltBits) - 1, MVT::i32);
|
|
|
|
assert(Value.getValueType().getScalarSizeInBits() >= 32);
|
|
|
|
SDValue PackedValue;
|
|
for (unsigned i = 0; i < MemNumElements; ++i) {
|
|
SDValue Elt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, ElemVT, Value,
|
|
DAG.getConstant(i, MVT::i32));
|
|
Elt = DAG.getZExtOrTrunc(Elt, DL, MVT::i32);
|
|
Elt = DAG.getNode(ISD::AND, DL, MVT::i32, Elt, Mask); // getZeroExtendInReg
|
|
|
|
SDValue Shift = DAG.getConstant(MemEltBits * i, MVT::i32);
|
|
Elt = DAG.getNode(ISD::SHL, DL, MVT::i32, Elt, Shift);
|
|
|
|
if (i == 0) {
|
|
PackedValue = Elt;
|
|
} else {
|
|
PackedValue = DAG.getNode(ISD::OR, DL, MVT::i32, PackedValue, Elt);
|
|
}
|
|
}
|
|
|
|
if (PackedSize < 32) {
|
|
EVT PackedVT = EVT::getIntegerVT(*DAG.getContext(), PackedSize);
|
|
return DAG.getTruncStore(Store->getChain(), DL, PackedValue, Ptr,
|
|
Store->getMemOperand()->getPointerInfo(),
|
|
PackedVT,
|
|
Store->isNonTemporal(), Store->isVolatile(),
|
|
Store->getAlignment());
|
|
}
|
|
|
|
return DAG.getStore(Store->getChain(), DL, PackedValue, Ptr,
|
|
Store->getMemOperand()->getPointerInfo(),
|
|
Store->isVolatile(), Store->isNonTemporal(),
|
|
Store->getAlignment());
|
|
}
|
|
|
|
SDValue AMDGPUTargetLowering::SplitVectorStore(SDValue Op,
|
|
SelectionDAG &DAG) const {
|
|
StoreSDNode *Store = cast<StoreSDNode>(Op);
|
|
EVT MemEltVT = Store->getMemoryVT().getVectorElementType();
|
|
EVT EltVT = Store->getValue().getValueType().getVectorElementType();
|
|
EVT PtrVT = Store->getBasePtr().getValueType();
|
|
unsigned NumElts = Store->getMemoryVT().getVectorNumElements();
|
|
SDLoc SL(Op);
|
|
|
|
SmallVector<SDValue, 8> Chains;
|
|
|
|
for (unsigned i = 0, e = NumElts; i != e; ++i) {
|
|
SDValue Val = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SL, EltVT,
|
|
Store->getValue(), DAG.getConstant(i, MVT::i32));
|
|
SDValue Ptr = DAG.getNode(ISD::ADD, SL, PtrVT,
|
|
Store->getBasePtr(),
|
|
DAG.getConstant(i * (MemEltVT.getSizeInBits() / 8),
|
|
PtrVT));
|
|
Chains.push_back(DAG.getTruncStore(Store->getChain(), SL, Val, Ptr,
|
|
MachinePointerInfo(Store->getMemOperand()->getValue()),
|
|
MemEltVT, Store->isVolatile(), Store->isNonTemporal(),
|
|
Store->getAlignment()));
|
|
}
|
|
return DAG.getNode(ISD::TokenFactor, SL, MVT::Other, Chains);
|
|
}
|
|
|
|
SDValue AMDGPUTargetLowering::LowerLOAD(SDValue Op, SelectionDAG &DAG) const {
|
|
SDLoc DL(Op);
|
|
LoadSDNode *Load = cast<LoadSDNode>(Op);
|
|
ISD::LoadExtType ExtType = Load->getExtensionType();
|
|
EVT VT = Op.getValueType();
|
|
EVT MemVT = Load->getMemoryVT();
|
|
|
|
if (ExtType != ISD::NON_EXTLOAD && !VT.isVector() && VT.getSizeInBits() > 32) {
|
|
// We can do the extload to 32-bits, and then need to separately extend to
|
|
// 64-bits.
|
|
|
|
SDValue ExtLoad32 = DAG.getExtLoad(ExtType, DL, MVT::i32,
|
|
Load->getChain(),
|
|
Load->getBasePtr(),
|
|
MemVT,
|
|
Load->getMemOperand());
|
|
return DAG.getNode(ISD::getExtForLoadExtType(ExtType), DL, VT, ExtLoad32);
|
|
}
|
|
|
|
if (ExtType == ISD::NON_EXTLOAD && VT.getSizeInBits() < 32) {
|
|
assert(VT == MVT::i1 && "Only i1 non-extloads expected");
|
|
// FIXME: Copied from PPC
|
|
// First, load into 32 bits, then truncate to 1 bit.
|
|
|
|
SDValue Chain = Load->getChain();
|
|
SDValue BasePtr = Load->getBasePtr();
|
|
MachineMemOperand *MMO = Load->getMemOperand();
|
|
|
|
SDValue NewLD = DAG.getExtLoad(ISD::EXTLOAD, DL, MVT::i32, Chain,
|
|
BasePtr, MVT::i8, MMO);
|
|
return DAG.getNode(ISD::TRUNCATE, DL, VT, NewLD);
|
|
}
|
|
|
|
// Lower loads constant address space global variable loads
|
|
if (Load->getAddressSpace() == AMDGPUAS::CONSTANT_ADDRESS &&
|
|
isa<GlobalVariable>(
|
|
GetUnderlyingObject(Load->getMemOperand()->getValue()))) {
|
|
|
|
SDValue Ptr = DAG.getZExtOrTrunc(Load->getBasePtr(), DL,
|
|
getPointerTy(AMDGPUAS::PRIVATE_ADDRESS));
|
|
Ptr = DAG.getNode(ISD::SRL, DL, MVT::i32, Ptr,
|
|
DAG.getConstant(2, MVT::i32));
|
|
return DAG.getNode(AMDGPUISD::REGISTER_LOAD, DL, Op.getValueType(),
|
|
Load->getChain(), Ptr,
|
|
DAG.getTargetConstant(0, MVT::i32), Op.getOperand(2));
|
|
}
|
|
|
|
if (Load->getAddressSpace() != AMDGPUAS::PRIVATE_ADDRESS ||
|
|
ExtType == ISD::NON_EXTLOAD || Load->getMemoryVT().bitsGE(MVT::i32))
|
|
return SDValue();
|
|
|
|
|
|
SDValue Ptr = DAG.getNode(ISD::SRL, DL, MVT::i32, Load->getBasePtr(),
|
|
DAG.getConstant(2, MVT::i32));
|
|
SDValue Ret = DAG.getNode(AMDGPUISD::REGISTER_LOAD, DL, Op.getValueType(),
|
|
Load->getChain(), Ptr,
|
|
DAG.getTargetConstant(0, MVT::i32),
|
|
Op.getOperand(2));
|
|
SDValue ByteIdx = DAG.getNode(ISD::AND, DL, MVT::i32,
|
|
Load->getBasePtr(),
|
|
DAG.getConstant(0x3, MVT::i32));
|
|
SDValue ShiftAmt = DAG.getNode(ISD::SHL, DL, MVT::i32, ByteIdx,
|
|
DAG.getConstant(3, MVT::i32));
|
|
|
|
Ret = DAG.getNode(ISD::SRL, DL, MVT::i32, Ret, ShiftAmt);
|
|
|
|
EVT MemEltVT = MemVT.getScalarType();
|
|
if (ExtType == ISD::SEXTLOAD) {
|
|
SDValue MemEltVTNode = DAG.getValueType(MemEltVT);
|
|
return DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, MVT::i32, Ret, MemEltVTNode);
|
|
}
|
|
|
|
return DAG.getZeroExtendInReg(Ret, DL, MemEltVT);
|
|
}
|
|
|
|
SDValue AMDGPUTargetLowering::LowerSTORE(SDValue Op, SelectionDAG &DAG) const {
|
|
SDLoc DL(Op);
|
|
SDValue Result = AMDGPUTargetLowering::MergeVectorStore(Op, DAG);
|
|
if (Result.getNode()) {
|
|
return Result;
|
|
}
|
|
|
|
StoreSDNode *Store = cast<StoreSDNode>(Op);
|
|
SDValue Chain = Store->getChain();
|
|
if ((Store->getAddressSpace() == AMDGPUAS::LOCAL_ADDRESS ||
|
|
Store->getAddressSpace() == AMDGPUAS::PRIVATE_ADDRESS) &&
|
|
Store->getValue().getValueType().isVector()) {
|
|
return SplitVectorStore(Op, DAG);
|
|
}
|
|
|
|
EVT MemVT = Store->getMemoryVT();
|
|
if (Store->getAddressSpace() == AMDGPUAS::PRIVATE_ADDRESS &&
|
|
MemVT.bitsLT(MVT::i32)) {
|
|
unsigned Mask = 0;
|
|
if (Store->getMemoryVT() == MVT::i8) {
|
|
Mask = 0xff;
|
|
} else if (Store->getMemoryVT() == MVT::i16) {
|
|
Mask = 0xffff;
|
|
}
|
|
SDValue BasePtr = Store->getBasePtr();
|
|
SDValue Ptr = DAG.getNode(ISD::SRL, DL, MVT::i32, BasePtr,
|
|
DAG.getConstant(2, MVT::i32));
|
|
SDValue Dst = DAG.getNode(AMDGPUISD::REGISTER_LOAD, DL, MVT::i32,
|
|
Chain, Ptr, DAG.getTargetConstant(0, MVT::i32));
|
|
|
|
SDValue ByteIdx = DAG.getNode(ISD::AND, DL, MVT::i32, BasePtr,
|
|
DAG.getConstant(0x3, MVT::i32));
|
|
|
|
SDValue ShiftAmt = DAG.getNode(ISD::SHL, DL, MVT::i32, ByteIdx,
|
|
DAG.getConstant(3, MVT::i32));
|
|
|
|
SDValue SExtValue = DAG.getNode(ISD::SIGN_EXTEND, DL, MVT::i32,
|
|
Store->getValue());
|
|
|
|
SDValue MaskedValue = DAG.getZeroExtendInReg(SExtValue, DL, MemVT);
|
|
|
|
SDValue ShiftedValue = DAG.getNode(ISD::SHL, DL, MVT::i32,
|
|
MaskedValue, ShiftAmt);
|
|
|
|
SDValue DstMask = DAG.getNode(ISD::SHL, DL, MVT::i32, DAG.getConstant(Mask, MVT::i32),
|
|
ShiftAmt);
|
|
DstMask = DAG.getNode(ISD::XOR, DL, MVT::i32, DstMask,
|
|
DAG.getConstant(0xffffffff, MVT::i32));
|
|
Dst = DAG.getNode(ISD::AND, DL, MVT::i32, Dst, DstMask);
|
|
|
|
SDValue Value = DAG.getNode(ISD::OR, DL, MVT::i32, Dst, ShiftedValue);
|
|
return DAG.getNode(AMDGPUISD::REGISTER_STORE, DL, MVT::Other,
|
|
Chain, Value, Ptr, DAG.getTargetConstant(0, MVT::i32));
|
|
}
|
|
return SDValue();
|
|
}
|
|
|
|
SDValue AMDGPUTargetLowering::LowerUDIVREM(SDValue Op,
|
|
SelectionDAG &DAG) const {
|
|
SDLoc DL(Op);
|
|
EVT VT = Op.getValueType();
|
|
|
|
SDValue Num = Op.getOperand(0);
|
|
SDValue Den = Op.getOperand(1);
|
|
|
|
SmallVector<SDValue, 8> Results;
|
|
|
|
// RCP = URECIP(Den) = 2^32 / Den + e
|
|
// e is rounding error.
|
|
SDValue RCP = DAG.getNode(AMDGPUISD::URECIP, DL, VT, Den);
|
|
|
|
// RCP_LO = umulo(RCP, Den) */
|
|
SDValue RCP_LO = DAG.getNode(ISD::UMULO, DL, VT, RCP, Den);
|
|
|
|
// RCP_HI = mulhu (RCP, Den) */
|
|
SDValue RCP_HI = DAG.getNode(ISD::MULHU, DL, VT, RCP, Den);
|
|
|
|
// NEG_RCP_LO = -RCP_LO
|
|
SDValue NEG_RCP_LO = DAG.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, VT),
|
|
RCP_LO);
|
|
|
|
// ABS_RCP_LO = (RCP_HI == 0 ? NEG_RCP_LO : RCP_LO)
|
|
SDValue ABS_RCP_LO = DAG.getSelectCC(DL, RCP_HI, DAG.getConstant(0, VT),
|
|
NEG_RCP_LO, RCP_LO,
|
|
ISD::SETEQ);
|
|
// Calculate the rounding error from the URECIP instruction
|
|
// E = mulhu(ABS_RCP_LO, RCP)
|
|
SDValue E = DAG.getNode(ISD::MULHU, DL, VT, ABS_RCP_LO, RCP);
|
|
|
|
// RCP_A_E = RCP + E
|
|
SDValue RCP_A_E = DAG.getNode(ISD::ADD, DL, VT, RCP, E);
|
|
|
|
// RCP_S_E = RCP - E
|
|
SDValue RCP_S_E = DAG.getNode(ISD::SUB, DL, VT, RCP, E);
|
|
|
|
// Tmp0 = (RCP_HI == 0 ? RCP_A_E : RCP_SUB_E)
|
|
SDValue Tmp0 = DAG.getSelectCC(DL, RCP_HI, DAG.getConstant(0, VT),
|
|
RCP_A_E, RCP_S_E,
|
|
ISD::SETEQ);
|
|
// Quotient = mulhu(Tmp0, Num)
|
|
SDValue Quotient = DAG.getNode(ISD::MULHU, DL, VT, Tmp0, Num);
|
|
|
|
// Num_S_Remainder = Quotient * Den
|
|
SDValue Num_S_Remainder = DAG.getNode(ISD::UMULO, DL, VT, Quotient, Den);
|
|
|
|
// Remainder = Num - Num_S_Remainder
|
|
SDValue Remainder = DAG.getNode(ISD::SUB, DL, VT, Num, Num_S_Remainder);
|
|
|
|
// Remainder_GE_Den = (Remainder >= Den ? -1 : 0)
|
|
SDValue Remainder_GE_Den = DAG.getSelectCC(DL, Remainder, Den,
|
|
DAG.getConstant(-1, VT),
|
|
DAG.getConstant(0, VT),
|
|
ISD::SETUGE);
|
|
// Remainder_GE_Zero = (Num >= Num_S_Remainder ? -1 : 0)
|
|
SDValue Remainder_GE_Zero = DAG.getSelectCC(DL, Num,
|
|
Num_S_Remainder,
|
|
DAG.getConstant(-1, VT),
|
|
DAG.getConstant(0, VT),
|
|
ISD::SETUGE);
|
|
// Tmp1 = Remainder_GE_Den & Remainder_GE_Zero
|
|
SDValue Tmp1 = DAG.getNode(ISD::AND, DL, VT, Remainder_GE_Den,
|
|
Remainder_GE_Zero);
|
|
|
|
// Calculate Division result:
|
|
|
|
// Quotient_A_One = Quotient + 1
|
|
SDValue Quotient_A_One = DAG.getNode(ISD::ADD, DL, VT, Quotient,
|
|
DAG.getConstant(1, VT));
|
|
|
|
// Quotient_S_One = Quotient - 1
|
|
SDValue Quotient_S_One = DAG.getNode(ISD::SUB, DL, VT, Quotient,
|
|
DAG.getConstant(1, VT));
|
|
|
|
// Div = (Tmp1 == 0 ? Quotient : Quotient_A_One)
|
|
SDValue Div = DAG.getSelectCC(DL, Tmp1, DAG.getConstant(0, VT),
|
|
Quotient, Quotient_A_One, ISD::SETEQ);
|
|
|
|
// Div = (Remainder_GE_Zero == 0 ? Quotient_S_One : Div)
|
|
Div = DAG.getSelectCC(DL, Remainder_GE_Zero, DAG.getConstant(0, VT),
|
|
Quotient_S_One, Div, ISD::SETEQ);
|
|
|
|
// Calculate Rem result:
|
|
|
|
// Remainder_S_Den = Remainder - Den
|
|
SDValue Remainder_S_Den = DAG.getNode(ISD::SUB, DL, VT, Remainder, Den);
|
|
|
|
// Remainder_A_Den = Remainder + Den
|
|
SDValue Remainder_A_Den = DAG.getNode(ISD::ADD, DL, VT, Remainder, Den);
|
|
|
|
// Rem = (Tmp1 == 0 ? Remainder : Remainder_S_Den)
|
|
SDValue Rem = DAG.getSelectCC(DL, Tmp1, DAG.getConstant(0, VT),
|
|
Remainder, Remainder_S_Den, ISD::SETEQ);
|
|
|
|
// Rem = (Remainder_GE_Zero == 0 ? Remainder_A_Den : Rem)
|
|
Rem = DAG.getSelectCC(DL, Remainder_GE_Zero, DAG.getConstant(0, VT),
|
|
Remainder_A_Den, Rem, ISD::SETEQ);
|
|
SDValue Ops[2] = {
|
|
Div,
|
|
Rem
|
|
};
|
|
return DAG.getMergeValues(Ops, DL);
|
|
}
|
|
|
|
SDValue AMDGPUTargetLowering::LowerUINT_TO_FP(SDValue Op,
|
|
SelectionDAG &DAG) const {
|
|
SDValue S0 = Op.getOperand(0);
|
|
SDLoc DL(Op);
|
|
if (Op.getValueType() != MVT::f32 || S0.getValueType() != MVT::i64)
|
|
return SDValue();
|
|
|
|
// f32 uint_to_fp i64
|
|
SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, MVT::i32, S0,
|
|
DAG.getConstant(0, MVT::i32));
|
|
SDValue FloatLo = DAG.getNode(ISD::UINT_TO_FP, DL, MVT::f32, Lo);
|
|
SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, MVT::i32, S0,
|
|
DAG.getConstant(1, MVT::i32));
|
|
SDValue FloatHi = DAG.getNode(ISD::UINT_TO_FP, DL, MVT::f32, Hi);
|
|
FloatHi = DAG.getNode(ISD::FMUL, DL, MVT::f32, FloatHi,
|
|
DAG.getConstantFP(4294967296.0f, MVT::f32)); // 2^32
|
|
return DAG.getNode(ISD::FADD, DL, MVT::f32, FloatLo, FloatHi);
|
|
|
|
}
|
|
|
|
SDValue AMDGPUTargetLowering::ExpandSIGN_EXTEND_INREG(SDValue Op,
|
|
unsigned BitsDiff,
|
|
SelectionDAG &DAG) const {
|
|
MVT VT = Op.getSimpleValueType();
|
|
SDLoc DL(Op);
|
|
SDValue Shift = DAG.getConstant(BitsDiff, VT);
|
|
// Shift left by 'Shift' bits.
|
|
SDValue Shl = DAG.getNode(ISD::SHL, DL, VT, Op.getOperand(0), Shift);
|
|
// Signed shift Right by 'Shift' bits.
|
|
return DAG.getNode(ISD::SRA, DL, VT, Shl, Shift);
|
|
}
|
|
|
|
SDValue AMDGPUTargetLowering::LowerSIGN_EXTEND_INREG(SDValue Op,
|
|
SelectionDAG &DAG) const {
|
|
EVT ExtraVT = cast<VTSDNode>(Op.getOperand(1))->getVT();
|
|
MVT VT = Op.getSimpleValueType();
|
|
MVT ScalarVT = VT.getScalarType();
|
|
|
|
if (!VT.isVector())
|
|
return SDValue();
|
|
|
|
SDValue Src = Op.getOperand(0);
|
|
SDLoc DL(Op);
|
|
|
|
// TODO: Don't scalarize on Evergreen?
|
|
unsigned NElts = VT.getVectorNumElements();
|
|
SmallVector<SDValue, 8> Args;
|
|
DAG.ExtractVectorElements(Src, Args, 0, NElts);
|
|
|
|
SDValue VTOp = DAG.getValueType(ExtraVT.getScalarType());
|
|
for (unsigned I = 0; I < NElts; ++I)
|
|
Args[I] = DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, ScalarVT, Args[I], VTOp);
|
|
|
|
return DAG.getNode(ISD::BUILD_VECTOR, DL, VT, Args);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Custom DAG optimizations
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
static bool isU24(SDValue Op, SelectionDAG &DAG) {
|
|
APInt KnownZero, KnownOne;
|
|
EVT VT = Op.getValueType();
|
|
DAG.ComputeMaskedBits(Op, KnownZero, KnownOne);
|
|
|
|
return (VT.getSizeInBits() - KnownZero.countLeadingOnes()) <= 24;
|
|
}
|
|
|
|
static bool isI24(SDValue Op, SelectionDAG &DAG) {
|
|
EVT VT = Op.getValueType();
|
|
|
|
// In order for this to be a signed 24-bit value, bit 23, must
|
|
// be a sign bit.
|
|
return VT.getSizeInBits() >= 24 && // Types less than 24-bit should be treated
|
|
// as unsigned 24-bit values.
|
|
(VT.getSizeInBits() - DAG.ComputeNumSignBits(Op)) < 24;
|
|
}
|
|
|
|
static void simplifyI24(SDValue Op, TargetLowering::DAGCombinerInfo &DCI) {
|
|
|
|
SelectionDAG &DAG = DCI.DAG;
|
|
const TargetLowering &TLI = DAG.getTargetLoweringInfo();
|
|
EVT VT = Op.getValueType();
|
|
|
|
APInt Demanded = APInt::getLowBitsSet(VT.getSizeInBits(), 24);
|
|
APInt KnownZero, KnownOne;
|
|
TargetLowering::TargetLoweringOpt TLO(DAG, true, true);
|
|
if (TLI.SimplifyDemandedBits(Op, Demanded, KnownZero, KnownOne, TLO))
|
|
DCI.CommitTargetLoweringOpt(TLO);
|
|
}
|
|
|
|
SDValue AMDGPUTargetLowering::PerformDAGCombine(SDNode *N,
|
|
DAGCombinerInfo &DCI) const {
|
|
SelectionDAG &DAG = DCI.DAG;
|
|
SDLoc DL(N);
|
|
|
|
switch(N->getOpcode()) {
|
|
default: break;
|
|
case ISD::MUL: {
|
|
EVT VT = N->getValueType(0);
|
|
SDValue N0 = N->getOperand(0);
|
|
SDValue N1 = N->getOperand(1);
|
|
SDValue Mul;
|
|
|
|
// FIXME: Add support for 24-bit multiply with 64-bit output on SI.
|
|
if (VT.isVector() || VT.getSizeInBits() > 32)
|
|
break;
|
|
|
|
if (Subtarget->hasMulU24() && isU24(N0, DAG) && isU24(N1, DAG)) {
|
|
N0 = DAG.getZExtOrTrunc(N0, DL, MVT::i32);
|
|
N1 = DAG.getZExtOrTrunc(N1, DL, MVT::i32);
|
|
Mul = DAG.getNode(AMDGPUISD::MUL_U24, DL, MVT::i32, N0, N1);
|
|
} else if (Subtarget->hasMulI24() && isI24(N0, DAG) && isI24(N1, DAG)) {
|
|
N0 = DAG.getSExtOrTrunc(N0, DL, MVT::i32);
|
|
N1 = DAG.getSExtOrTrunc(N1, DL, MVT::i32);
|
|
Mul = DAG.getNode(AMDGPUISD::MUL_I24, DL, MVT::i32, N0, N1);
|
|
} else {
|
|
break;
|
|
}
|
|
|
|
// We need to use sext even for MUL_U24, because MUL_U24 is used
|
|
// for signed multiply of 8 and 16-bit types.
|
|
SDValue Reg = DAG.getSExtOrTrunc(Mul, DL, VT);
|
|
|
|
return Reg;
|
|
}
|
|
case AMDGPUISD::MUL_I24:
|
|
case AMDGPUISD::MUL_U24: {
|
|
SDValue N0 = N->getOperand(0);
|
|
SDValue N1 = N->getOperand(1);
|
|
simplifyI24(N0, DCI);
|
|
simplifyI24(N1, DCI);
|
|
return SDValue();
|
|
}
|
|
}
|
|
return SDValue();
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Helper functions
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
void AMDGPUTargetLowering::getOriginalFunctionArgs(
|
|
SelectionDAG &DAG,
|
|
const Function *F,
|
|
const SmallVectorImpl<ISD::InputArg> &Ins,
|
|
SmallVectorImpl<ISD::InputArg> &OrigIns) const {
|
|
|
|
for (unsigned i = 0, e = Ins.size(); i < e; ++i) {
|
|
if (Ins[i].ArgVT == Ins[i].VT) {
|
|
OrigIns.push_back(Ins[i]);
|
|
continue;
|
|
}
|
|
|
|
EVT VT;
|
|
if (Ins[i].ArgVT.isVector() && !Ins[i].VT.isVector()) {
|
|
// Vector has been split into scalars.
|
|
VT = Ins[i].ArgVT.getVectorElementType();
|
|
} else if (Ins[i].VT.isVector() && Ins[i].ArgVT.isVector() &&
|
|
Ins[i].ArgVT.getVectorElementType() !=
|
|
Ins[i].VT.getVectorElementType()) {
|
|
// Vector elements have been promoted
|
|
VT = Ins[i].ArgVT;
|
|
} else {
|
|
// Vector has been spilt into smaller vectors.
|
|
VT = Ins[i].VT;
|
|
}
|
|
|
|
ISD::InputArg Arg(Ins[i].Flags, VT, VT, Ins[i].Used,
|
|
Ins[i].OrigArgIndex, Ins[i].PartOffset);
|
|
OrigIns.push_back(Arg);
|
|
}
|
|
}
|
|
|
|
bool AMDGPUTargetLowering::isHWTrueValue(SDValue Op) const {
|
|
if (ConstantFPSDNode * CFP = dyn_cast<ConstantFPSDNode>(Op)) {
|
|
return CFP->isExactlyValue(1.0);
|
|
}
|
|
if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
|
|
return C->isAllOnesValue();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool AMDGPUTargetLowering::isHWFalseValue(SDValue Op) const {
|
|
if (ConstantFPSDNode * CFP = dyn_cast<ConstantFPSDNode>(Op)) {
|
|
return CFP->getValueAPF().isZero();
|
|
}
|
|
if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
|
|
return C->isNullValue();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
SDValue AMDGPUTargetLowering::CreateLiveInRegister(SelectionDAG &DAG,
|
|
const TargetRegisterClass *RC,
|
|
unsigned Reg, EVT VT) const {
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
MachineRegisterInfo &MRI = MF.getRegInfo();
|
|
unsigned VirtualRegister;
|
|
if (!MRI.isLiveIn(Reg)) {
|
|
VirtualRegister = MRI.createVirtualRegister(RC);
|
|
MRI.addLiveIn(Reg, VirtualRegister);
|
|
} else {
|
|
VirtualRegister = MRI.getLiveInVirtReg(Reg);
|
|
}
|
|
return DAG.getRegister(VirtualRegister, VT);
|
|
}
|
|
|
|
#define NODE_NAME_CASE(node) case AMDGPUISD::node: return #node;
|
|
|
|
const char* AMDGPUTargetLowering::getTargetNodeName(unsigned Opcode) const {
|
|
switch (Opcode) {
|
|
default: return nullptr;
|
|
// AMDIL DAG nodes
|
|
NODE_NAME_CASE(CALL);
|
|
NODE_NAME_CASE(UMUL);
|
|
NODE_NAME_CASE(DIV_INF);
|
|
NODE_NAME_CASE(RET_FLAG);
|
|
NODE_NAME_CASE(BRANCH_COND);
|
|
|
|
// AMDGPU DAG nodes
|
|
NODE_NAME_CASE(DWORDADDR)
|
|
NODE_NAME_CASE(FRACT)
|
|
NODE_NAME_CASE(FMAX)
|
|
NODE_NAME_CASE(SMAX)
|
|
NODE_NAME_CASE(UMAX)
|
|
NODE_NAME_CASE(FMIN)
|
|
NODE_NAME_CASE(SMIN)
|
|
NODE_NAME_CASE(UMIN)
|
|
NODE_NAME_CASE(BFE_U32)
|
|
NODE_NAME_CASE(BFE_I32)
|
|
NODE_NAME_CASE(BFI)
|
|
NODE_NAME_CASE(BFM)
|
|
NODE_NAME_CASE(MUL_U24)
|
|
NODE_NAME_CASE(MUL_I24)
|
|
NODE_NAME_CASE(URECIP)
|
|
NODE_NAME_CASE(DOT4)
|
|
NODE_NAME_CASE(EXPORT)
|
|
NODE_NAME_CASE(CONST_ADDRESS)
|
|
NODE_NAME_CASE(REGISTER_LOAD)
|
|
NODE_NAME_CASE(REGISTER_STORE)
|
|
NODE_NAME_CASE(LOAD_CONSTANT)
|
|
NODE_NAME_CASE(LOAD_INPUT)
|
|
NODE_NAME_CASE(SAMPLE)
|
|
NODE_NAME_CASE(SAMPLEB)
|
|
NODE_NAME_CASE(SAMPLED)
|
|
NODE_NAME_CASE(SAMPLEL)
|
|
NODE_NAME_CASE(STORE_MSKOR)
|
|
NODE_NAME_CASE(TBUFFER_STORE_FORMAT)
|
|
}
|
|
}
|
|
|
|
static void computeMaskedBitsForMinMax(const SDValue Op0,
|
|
const SDValue Op1,
|
|
APInt &KnownZero,
|
|
APInt &KnownOne,
|
|
const SelectionDAG &DAG,
|
|
unsigned Depth) {
|
|
APInt Op0Zero, Op0One;
|
|
APInt Op1Zero, Op1One;
|
|
DAG.ComputeMaskedBits(Op0, Op0Zero, Op0One, Depth);
|
|
DAG.ComputeMaskedBits(Op1, Op1Zero, Op1One, Depth);
|
|
|
|
KnownZero = Op0Zero & Op1Zero;
|
|
KnownOne = Op0One & Op1One;
|
|
}
|
|
|
|
void AMDGPUTargetLowering::computeMaskedBitsForTargetNode(
|
|
const SDValue Op,
|
|
APInt &KnownZero,
|
|
APInt &KnownOne,
|
|
const SelectionDAG &DAG,
|
|
unsigned Depth) const {
|
|
|
|
KnownZero = KnownOne = APInt(KnownOne.getBitWidth(), 0); // Don't know anything.
|
|
unsigned Opc = Op.getOpcode();
|
|
switch (Opc) {
|
|
case ISD::INTRINSIC_WO_CHAIN: {
|
|
// FIXME: The intrinsic should just use the node.
|
|
switch (cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue()) {
|
|
case AMDGPUIntrinsic::AMDGPU_imax:
|
|
case AMDGPUIntrinsic::AMDGPU_umax:
|
|
case AMDGPUIntrinsic::AMDGPU_imin:
|
|
case AMDGPUIntrinsic::AMDGPU_umin:
|
|
computeMaskedBitsForMinMax(Op.getOperand(1), Op.getOperand(2),
|
|
KnownZero, KnownOne, DAG, Depth);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
break;
|
|
}
|
|
case AMDGPUISD::SMAX:
|
|
case AMDGPUISD::UMAX:
|
|
case AMDGPUISD::SMIN:
|
|
case AMDGPUISD::UMIN:
|
|
computeMaskedBitsForMinMax(Op.getOperand(0), Op.getOperand(1),
|
|
KnownZero, KnownOne, DAG, Depth);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|