diff options
Diffstat (limited to 'src/cpu/base_dyn_inst.hh')
| -rw-r--r-- | src/cpu/base_dyn_inst.hh | 165 |
1 files changed, 144 insertions, 21 deletions
diff --git a/src/cpu/base_dyn_inst.hh b/src/cpu/base_dyn_inst.hh index 9037c96df..515cd0836 100644 --- a/src/cpu/base_dyn_inst.hh +++ b/src/cpu/base_dyn_inst.hh @@ -39,6 +39,7 @@ #include "base/fast_alloc.hh" #include "base/trace.hh" #include "config/full_system.hh" +#include "cpu/o3/comm.hh" #include "cpu/exetrace.hh" #include "cpu/inst_seq.hh" #include "cpu/op_class.hh" @@ -62,10 +63,6 @@ class BaseDynInst : public FastAlloc, public RefCounted typedef typename Impl::CPUType ImplCPU; typedef typename ImplCPU::ImplState ImplState; - // Binary machine instruction type. - typedef TheISA::MachInst MachInst; - // Extended machine instruction type - typedef TheISA::ExtMachInst ExtMachInst; // Logical register index type. typedef TheISA::RegIndex RegIndex; // Integer register type. @@ -212,6 +209,7 @@ class BaseDynInst : public FastAlloc, public RefCounted /** PC of this instruction. */ Addr PC; + protected: /** Next non-speculative PC. It is not filled in at fetch, but rather * once the target of the branch is truly known (either decode or * execute). @@ -224,6 +222,14 @@ class BaseDynInst : public FastAlloc, public RefCounted /** Predicted next PC. */ Addr predPC; + /** Predicted next NPC. */ + Addr predNPC; + + /** If this is a branch that was predicted taken */ + bool predTaken; + + public: + /** Count of total number of dynamic instructions. */ static int instcount; @@ -236,16 +242,116 @@ class BaseDynInst : public FastAlloc, public RefCounted */ bool _readySrcRegIdx[MaxInstSrcRegs]; + protected: + /** Flattened register index of the destination registers of this + * instruction. + */ + TheISA::RegIndex _flatDestRegIdx[TheISA::MaxInstDestRegs]; + + /** Flattened register index of the source registers of this + * instruction. + */ + TheISA::RegIndex _flatSrcRegIdx[TheISA::MaxInstSrcRegs]; + + /** Physical register index of the destination registers of this + * instruction. + */ + PhysRegIndex _destRegIdx[TheISA::MaxInstDestRegs]; + + /** Physical register index of the source registers of this + * instruction. + */ + PhysRegIndex _srcRegIdx[TheISA::MaxInstSrcRegs]; + + /** Physical register index of the previous producers of the + * architected destinations. + */ + PhysRegIndex _prevDestRegIdx[TheISA::MaxInstDestRegs]; + public: + + /** 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 flattened register index of the i'th destination + * register. + */ + TheISA::RegIndex flattenedDestRegIdx(int idx) const + { + return _flatDestRegIdx[idx]; + } + + /** Returns the flattened register index of the i'th source register */ + TheISA::RegIndex flattenedSrcRegIdx(int idx) const + { + return _flatSrcRegIdx[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; + } + + /** Flattens a source architectural register index into a logical index. + */ + void flattenSrcReg(int idx, TheISA::RegIndex flattened_src) + { + _flatSrcRegIdx[idx] = flattened_src; + } + + /** Flattens a destination architectural register index into a logical + * index. + */ + void flattenDestReg(int idx, TheISA::RegIndex flattened_dest) + { + _flatDestRegIdx[idx] = flattened_dest; + } + /** BaseDynInst constructor given a binary instruction. * @param inst The binary instruction. * @param PC The PC of the instruction. * @param pred_PC The predicted next PC. + * @param pred_NPC The predicted next NPC. * @param seq_num The sequence number of the instruction. * @param cpu Pointer to the instruction's CPU. */ - BaseDynInst(ExtMachInst inst, Addr PC, Addr pred_PC, InstSeqNum seq_num, - ImplCPU *cpu); + BaseDynInst(TheISA::ExtMachInst inst, Addr PC, Addr NPC, + Addr pred_PC, Addr pred_NPC, + InstSeqNum seq_num, ImplCPU *cpu); /** BaseDynInst constructor given a StaticInst pointer. * @param _staticInst The StaticInst for this BaseDynInst. @@ -287,29 +393,46 @@ class BaseDynInst : public FastAlloc, public RefCounted /** Returns the next NPC. This could be the speculative next NPC if it is * called prior to the actual branch target being calculated. */ - Addr readNextNPC() { return nextNPC; } + Addr readNextNPC() + { +#if ISA_HAS_DELAY_SLOT + return nextNPC; +#else + return nextPC + sizeof(TheISA::MachInst); +#endif + } /** Set the predicted target of this current instruction. */ - void setPredTarg(Addr predicted_PC) { predPC = predicted_PC; } + void setPredTarg(Addr predicted_PC, Addr predicted_NPC) + { + predPC = predicted_PC; + predNPC = predicted_NPC; + } + + /** Returns the predicted PC immediately after the branch. */ + Addr readPredPC() { return predPC; } - /** Returns the predicted target of the branch. */ - Addr readPredTarg() { return predPC; } + /** Returns the predicted PC two instructions after the branch */ + Addr readPredNPC() { return predNPC; } /** Returns whether the instruction was predicted taken or not. */ - bool predTaken() -#if ISA_HAS_DELAY_SLOT - { return predPC != (nextPC + sizeof(MachInst)); } -#else - { return predPC != (PC + sizeof(MachInst)); } -#endif + bool readPredTaken() + { + return predTaken; + } + + void setPredTaken(bool predicted_taken) + { + predTaken = predicted_taken; + } /** Returns whether the instruction mispredicted. */ bool mispredicted() -#if ISA_HAS_DELAY_SLOT - { return predPC != nextNPC; } -#else - { return predPC != nextPC; } -#endif + { + return readPredPC() != readNextPC() || + readPredNPC() != readNextNPC(); + } + // // Instruction types. Forward checks to StaticInst object. // |