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https://github.com/c64scene-ar/llvm-6502.git
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843c6c2d0e
This is using a hint from AMD APP OpenCL Programming Guide with empirically tweaked parameters. I used Unigine Heaven 3.0 to determine best parameters on my system (i7 2600/Radeon 6950/Kernel 3.9.4) the benchmark : it went from 38.8 average fps to 39.6, which is ~3% gain. (Lightmark 2008.2 gain is much more marginal: from 537 to 539) There is no lit test provided as the parameter were determined empirically and it it would be nearly impossiblet to find a test program that check for optimal behavior. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183593 91177308-0d34-0410-b5e6-96231b3b80d8
105 lines
2.5 KiB
C++
105 lines
2.5 KiB
C++
//===-- R600MachineScheduler.h - R600 Scheduler Interface -*- C++ -*-------===//
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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 R600 Machine Scheduler interface
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//
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//===----------------------------------------------------------------------===//
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#ifndef R600MACHINESCHEDULER_H_
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#define R600MACHINESCHEDULER_H_
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#include "R600InstrInfo.h"
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#include "llvm/ADT/PriorityQueue.h"
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#include "llvm/CodeGen/MachineScheduler.h"
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#include "llvm/Support/Debug.h"
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using namespace llvm;
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namespace llvm {
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class R600SchedStrategy : public MachineSchedStrategy {
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const ScheduleDAGMI *DAG;
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const R600InstrInfo *TII;
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const R600RegisterInfo *TRI;
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MachineRegisterInfo *MRI;
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enum InstKind {
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IDAlu,
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IDFetch,
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IDOther,
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IDLast
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};
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enum AluKind {
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AluAny,
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AluT_X,
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AluT_Y,
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AluT_Z,
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AluT_W,
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AluT_XYZW,
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AluPredX,
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AluDiscarded, // LLVM Instructions that are going to be eliminated
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AluLast
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};
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std::vector<SUnit *> Available[IDLast], Pending[IDLast];
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std::vector<SUnit *> AvailableAlus[AluLast];
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std::vector<SUnit *> UnscheduledARDefs;
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std::vector<SUnit *> UnscheduledARUses;
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std::vector<SUnit *> PhysicalRegCopy;
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InstKind CurInstKind;
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int CurEmitted;
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InstKind NextInstKind;
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unsigned AluInstCount;
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unsigned FetchInstCount;
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int InstKindLimit[IDLast];
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int OccupedSlotsMask;
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public:
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R600SchedStrategy() :
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DAG(0), TII(0), TRI(0), MRI(0) {
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}
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virtual ~R600SchedStrategy() {
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}
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virtual void initialize(ScheduleDAGMI *dag);
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virtual SUnit *pickNode(bool &IsTopNode);
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virtual void schedNode(SUnit *SU, bool IsTopNode);
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virtual void releaseTopNode(SUnit *SU);
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virtual void releaseBottomNode(SUnit *SU);
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private:
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std::vector<MachineInstr *> InstructionsGroupCandidate;
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int getInstKind(SUnit *SU);
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bool regBelongsToClass(unsigned Reg, const TargetRegisterClass *RC) const;
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AluKind getAluKind(SUnit *SU) const;
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void LoadAlu();
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unsigned AvailablesAluCount() const;
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SUnit *AttemptFillSlot (unsigned Slot);
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void PrepareNextSlot();
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SUnit *PopInst(std::vector<SUnit*> &Q);
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void AssignSlot(MachineInstr *MI, unsigned Slot);
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SUnit* pickAlu();
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SUnit* pickOther(int QID);
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void MoveUnits(std::vector<SUnit *> &QSrc, std::vector<SUnit *> &QDst);
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};
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} // namespace llvm
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#endif /* R600MACHINESCHEDULER_H_ */
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