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2ac3a338b2
Passes to fix three hardware errata that appear on some LEON processor variants. The instructions FSMULD, FMULS and FDIVS do not work as expected on some LEON processors. This change allows those instructions to be substituted for alternatives instruction sequences that are known to work. These passes only run when selected individually, or as part of a processor defintion. They are not included in general SPARC processor compilations for non-LEON processors or for those LEON processors that do not have these hardware errata. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@273108 91177308-0d34-0410-b5e6-96231b3b80d8
119 lines
3.7 KiB
C++
119 lines
3.7 KiB
C++
//===-- SparcSubtarget.h - Define Subtarget for the SPARC -------*- 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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// This file declares the SPARC specific subclass of TargetSubtargetInfo.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_SPARC_SPARCSUBTARGET_H
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#define LLVM_LIB_TARGET_SPARC_SPARCSUBTARGET_H
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#include "SparcFrameLowering.h"
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#include "SparcISelLowering.h"
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#include "SparcInstrInfo.h"
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#include "llvm/CodeGen/SelectionDAGTargetInfo.h"
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#include "llvm/IR/DataLayout.h"
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#include "llvm/Target/TargetFrameLowering.h"
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#include "llvm/Target/TargetSubtargetInfo.h"
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#include <string>
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#define GET_SUBTARGETINFO_HEADER
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#include "SparcGenSubtargetInfo.inc"
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namespace llvm {
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class StringRef;
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class SparcSubtarget : public SparcGenSubtargetInfo {
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Triple TargetTriple;
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virtual void anchor();
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bool IsV9;
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bool IsLeon;
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bool V8DeprecatedInsts;
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bool IsVIS, IsVIS2, IsVIS3;
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bool Is64Bit;
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bool HasHardQuad;
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bool UsePopc;
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bool UseSoftFloat;
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// LEON features
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bool HasUmacSmac;
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bool HasLeonCasa;
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bool InsertNOPLoad;
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bool FixFSMULD;
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bool ReplaceFMULS;
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bool FixAllFDIVSQRT;
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SparcInstrInfo InstrInfo;
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SparcTargetLowering TLInfo;
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SelectionDAGTargetInfo TSInfo;
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SparcFrameLowering FrameLowering;
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public:
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SparcSubtarget(const Triple &TT, const std::string &CPU,
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const std::string &FS, const TargetMachine &TM, bool is64bit);
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const SparcInstrInfo *getInstrInfo() const override { return &InstrInfo; }
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const TargetFrameLowering *getFrameLowering() const override {
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return &FrameLowering;
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}
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const SparcRegisterInfo *getRegisterInfo() const override {
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return &InstrInfo.getRegisterInfo();
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}
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const SparcTargetLowering *getTargetLowering() const override {
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return &TLInfo;
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}
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const SelectionDAGTargetInfo *getSelectionDAGInfo() const override {
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return &TSInfo;
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}
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bool enableMachineScheduler() const override;
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bool isV9() const { return IsV9; }
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bool isLeon() const { return IsLeon; }
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bool isVIS() const { return IsVIS; }
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bool isVIS2() const { return IsVIS2; }
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bool isVIS3() const { return IsVIS3; }
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bool useDeprecatedV8Instructions() const { return V8DeprecatedInsts; }
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bool hasHardQuad() const { return HasHardQuad; }
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bool usePopc() const { return UsePopc; }
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bool useSoftFloat() const { return UseSoftFloat; }
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// Leon options
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bool hasUmacSmac() const { return HasUmacSmac; }
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bool hasLeonCasa() const { return HasLeonCasa; }
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bool insertNOPLoad() const { return InsertNOPLoad; }
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bool fixFSMULD() const { return FixFSMULD; }
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bool replaceFMULS() const { return ReplaceFMULS; }
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bool fixAllFDIVSQRT() const { return FixAllFDIVSQRT; }
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/// ParseSubtargetFeatures - Parses features string setting specified
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/// subtarget options. Definition of function is auto generated by tblgen.
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void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
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SparcSubtarget &initializeSubtargetDependencies(StringRef CPU, StringRef FS);
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bool is64Bit() const { return Is64Bit; }
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/// The 64-bit ABI uses biased stack and frame pointers, so the stack frame
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/// of the current function is the area from [%sp+BIAS] to [%fp+BIAS].
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int64_t getStackPointerBias() const {
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return is64Bit() ? 2047 : 0;
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}
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/// Given a actual stack size as determined by FrameInfo, this function
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/// returns adjusted framesize which includes space for register window
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/// spills and arguments.
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int getAdjustedFrameSize(int stackSize) const;
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bool isTargetLinux() const { return TargetTriple.isOSLinux(); }
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};
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} // end namespace llvm
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#endif
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