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Diffstat (limited to 'cpu/beta_cpu/alpha_dyn_inst.hh')
| -rw-r--r-- | cpu/beta_cpu/alpha_dyn_inst.hh | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/cpu/beta_cpu/alpha_dyn_inst.hh b/cpu/beta_cpu/alpha_dyn_inst.hh new file mode 100644 index 000000000..d34fa071c --- /dev/null +++ b/cpu/beta_cpu/alpha_dyn_inst.hh @@ -0,0 +1,208 @@ +//Todo: + +#ifndef __CPU_BETA_CPU_ALPHA_DYN_INST_HH__ +#define __CPU_BETA_CPU_ALPHA_DYN_INST_HH__ + +#include "cpu/base_dyn_inst.hh" +#include "cpu/beta_cpu/alpha_full_cpu.hh" +#include "cpu/beta_cpu/alpha_impl.hh" +#include "cpu/inst_seq.hh" + +/** + * Mostly implementation specific AlphaDynInst. It is templated in case there + * are other implementations that are similar enough to be able to use this + * class without changes. This is mainly useful if there are multiple similar + * CPU implementations of the same ISA. + */ + +template <class Impl> +class AlphaDynInst : public BaseDynInst<Impl> +{ + public: + /** Typedef for the CPU. */ + typedef typename Impl::FullCPU FullCPU; + + /** Typedef to get the ISA. */ + typedef typename Impl::ISA ISA; + + /** Binary machine instruction type. */ + typedef typename ISA::MachInst MachInst; + /** Memory address type. */ + typedef typename ISA::Addr Addr; + /** Logical register index type. */ + typedef typename ISA::RegIndex RegIndex; + /** Integer register index type. */ + typedef typename ISA::IntReg IntReg; + + enum { + MaxInstSrcRegs = ISA::MaxInstSrcRegs, //< Max source regs + MaxInstDestRegs = ISA::MaxInstDestRegs, //< Max dest regs + }; + + public: + /** BaseDynInst constructor given a binary instruction. */ + AlphaDynInst(MachInst inst, Addr PC, Addr Pred_PC, InstSeqNum seq_num, + FullCPU *cpu); + + /** BaseDynInst constructor given a static inst pointer. */ + AlphaDynInst(StaticInstPtr<AlphaISA> &_staticInst); + + /** Executes the instruction.*/ + Fault execute() + { + return this->fault = this->staticInst->execute(this, this->traceData); + } + + public: + uint64_t readUniq(); + void setUniq(uint64_t val); + + uint64_t readFpcr(); + void setFpcr(uint64_t val); + +#ifdef FULL_SYSTEM + uint64_t readIpr(int idx, Fault &fault); + Fault setIpr(int idx, uint64_t val); + Fault hwrei(); + int readIntrFlag(); + void setIntrFlag(int val); + bool inPalMode(); + void trap(Fault fault); + bool simPalCheck(int palFunc); +#else + void syscall(); +#endif + + + + private: + /** Physical register index of the destination registers of this + * instruction. + */ + PhysRegIndex _destRegIdx[MaxInstDestRegs]; + + /** Physical register index of the source registers of this + * instruction. + */ + PhysRegIndex _srcRegIdx[MaxInstSrcRegs]; + + /** Physical register index of the previous producers of the + * architected destinations. + */ + PhysRegIndex _prevDestRegIdx[MaxInstDestRegs]; + + public: + + // The register accessor methods provide the index of the + // instruction's operand (e.g., 0 or 1), not the architectural + // register index, to simplify the implementation of register + // renaming. We find the architectural register index by indexing + // into the instruction's own operand index table. Note that a + // raw pointer to the StaticInst is provided instead of a + // ref-counted StaticInstPtr to redice overhead. This is fine as + // long as these methods don't copy the pointer into any long-term + // storage (which is pretty hard to imagine they would have reason + // to do). + + uint64_t readIntReg(const StaticInst<ISA> *si, int idx) + { + return this->cpu->readIntReg(_srcRegIdx[idx]); + } + + float readFloatRegSingle(const StaticInst<ISA> *si, int idx) + { + return this->cpu->readFloatRegSingle(_srcRegIdx[idx]); + } + + double readFloatRegDouble(const StaticInst<ISA> *si, int idx) + { + return this->cpu->readFloatRegDouble(_srcRegIdx[idx]); + } + + uint64_t readFloatRegInt(const StaticInst<ISA> *si, int idx) + { + return this->cpu->readFloatRegInt(_srcRegIdx[idx]); + } + /** @todo: Make results into arrays so they can handle multiple dest + * registers. + */ + void setIntReg(const StaticInst<ISA> *si, int idx, uint64_t val) + { + this->cpu->setIntReg(_destRegIdx[idx], val); + this->instResult.integer = val; + } + + void setFloatRegSingle(const StaticInst<ISA> *si, int idx, float val) + { + this->cpu->setFloatRegSingle(_destRegIdx[idx], val); + this->instResult.fp = val; + } + + void setFloatRegDouble(const StaticInst<ISA> *si, int idx, double val) + { + this->cpu->setFloatRegDouble(_destRegIdx[idx], val); + this->instResult.dbl = val; + } + + void setFloatRegInt(const StaticInst<ISA> *si, int idx, uint64_t val) + { + this->cpu->setFloatRegInt(_destRegIdx[idx], val); + this->instResult.integer = val; + } + + /** Returns the physical register index of the i'th destination + * register. + */ + PhysRegIndex renamedDestRegIdx(int idx) const + { + return _destRegIdx[idx]; + } + + /** Returns the physical register index of the i'th source register. */ + PhysRegIndex renamedSrcRegIdx(int idx) const + { + return _srcRegIdx[idx]; + } + + /** Returns the physical register index of the previous physical register + * that remapped to the same logical register index. + */ + PhysRegIndex prevDestRegIdx(int idx) const + { + return _prevDestRegIdx[idx]; + } + + /** Renames a destination register to a physical register. Also records + * the previous physical register that the logical register mapped to. + */ + void renameDestReg(int idx, + PhysRegIndex renamed_dest, + PhysRegIndex previous_rename) + { + _destRegIdx[idx] = renamed_dest; + _prevDestRegIdx[idx] = previous_rename; + } + + /** Renames a source logical register to the physical register which + * has/will produce that logical register's result. + * @todo: add in whether or not the source register is ready. + */ + void renameSrcReg(int idx, PhysRegIndex renamed_src) + { + _srcRegIdx[idx] = renamed_src; + } + + public: + Fault calcEA() + { + return this->staticInst->eaCompInst()->execute(this, this->traceData); + } + + Fault memAccess() + { + return this->staticInst->memAccInst()->execute(this, this->traceData); + } +}; + +#endif // __CPU_BETA_CPU_ALPHA_DYN_INST_HH__ + |