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gem5
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gem5
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Base class for instructions whose disassembly is not purely a function of the machine instruction (i.e., it depends on the PC). More...
#include <branch.hh>
Protected Member Functions | |
| PCDependentDisassembly (const char *mnem, ExtMachInst _machInst, OpClass __opClass) | |
| Constructor. More... | |
| const std::string & | disassemble (Addr pc, const SymbolTable *symtab) const |
| Return string representation of disassembled instruction. More... | |
 Protected Member Functions inherited from PowerISA::PowerStaticInst | |
| PowerStaticInst (const char *mnem, MachInst _machInst, OpClass __opClass) | |
| uint32_t | insertCRField (uint32_t cr, uint32_t bf, uint32_t value) const |
| void | printReg (std::ostream &os, int reg) const |
| Print a register name for disassembly given the unique dependence tag number (FP or int). More... | |
| std::string | generateDisassembly (Addr pc, const SymbolTable *symtab) const |
| Internal function to generate disassembly string. More... | |
| void | advancePC (PowerISA::PCState &pcState) const |
| Protected Member Functions inherited from StaticInst | |
| StaticInst (const char *_mnemonic, ExtMachInst _machInst, OpClass __opClass) | |
| Constructor. More... | |
Protected Attributes | |
| Addr | cachedPC |
| Cached program counter from last disassembly. More... | |
| const SymbolTable * | cachedSymtab |
| Cached symbol table pointer from last disassembly. More... | |
| Protected Attributes inherited from StaticInst | |
| std::bitset< Num_Flags > | flags |
| Flag values for this instruction. More... | |
| OpClass | _opClass |
| See opClass(). More... | |
| int8_t | _numSrcRegs |
| See numSrcRegs(). More... | |
| int8_t | _numDestRegs |
| See numDestRegs(). More... | |
| RegIndex | _destRegIdx [MaxInstDestRegs] |
| See destRegIdx(). More... | |
| RegIndex | _srcRegIdx [MaxInstSrcRegs] |
| See srcRegIdx(). More... | |
| const char * | mnemonic |
| Base mnemonic (e.g., "add"). More... | |
| std::string * | cachedDisassembly |
| String representation of disassembly (lazily evaluated via disassemble()). More... | |
| int8_t | _numFPDestRegs |
| The following are used to track physical register usage for machines with separate int & FP reg files. More... | |
| int8_t | _numIntDestRegs |
| int8_t | _numCCDestRegs |
Additional Inherited Members | |
| Public Types inherited from StaticInst | |
| enum | { MaxInstSrcRegs = TheISA::MaxInstSrcRegs, MaxInstDestRegs = TheISA::MaxInstDestRegs } |
| typedef TheISA::ExtMachInst | ExtMachInst |
| Binary extended machine instruction type. More... | |
| typedef TheISA::RegIndex | RegIndex |
| Logical register index type. More... | |
| Public Member Functions inherited from StaticInst | |
| int8_t | numCCDestRegs () const |
| Number of coprocesor destination regs. More... | |
| void | setFirstMicroop () |
| void | setLastMicroop () |
| void | setDelayedCommit () |
| void | setFlag (Flags f) |
| OpClass | opClass () const |
| Operation class. Used to select appropriate function unit in issue. More... | |
| RegIndex | destRegIdx (int i) const |
| Return logical index (architectural reg num) of i'th destination reg. More... | |
| RegIndex | srcRegIdx (int i) const |
| Return logical index (architectural reg num) of i'th source reg. More... | |
| virtual const StaticInstPtr & | eaCompInst () const |
| Memory references only: returns "fake" instruction representing the effective address part of the memory operation. More... | |
| virtual const StaticInstPtr & | memAccInst () const |
| Memory references only: returns "fake" instruction representing the memory access part of the memory operation. More... | |
| virtual | ~StaticInst () |
| virtual Fault | execute (ExecContext *xc, Trace::InstRecord *traceData) const =0 |
| virtual Fault | eaComp (ExecContext *xc, Trace::InstRecord *traceData) const |
| virtual Fault | initiateAcc (ExecContext *xc, Trace::InstRecord *traceData) const |
| virtual Fault | completeAcc (Packet *pkt, ExecContext *xc, Trace::InstRecord *traceData) const |
| virtual void | advancePC (TheISA::PCState &pcState) const =0 |
| virtual StaticInstPtr | fetchMicroop (MicroPC upc) const |
| Return the microop that goes with a particular micropc. More... | |
| virtual TheISA::PCState | branchTarget (const TheISA::PCState &pc) const |
| Return the target address for a PC-relative branch. More... | |
| virtual TheISA::PCState | branchTarget (ThreadContext *tc) const |
| Return the target address for an indirect branch (jump). More... | |
| bool | hasBranchTarget (const TheISA::PCState &pc, ThreadContext *tc, TheISA::PCState &tgt) const |
| Return true if the instruction is a control transfer, and if so, return the target address as well. More... | |
| void | printFlags (std::ostream &outs, const std::string &separator) const |
| Print a separator separated list of this instruction's set flag names on the given stream. More... | |
| std::string | getName () |
| Return name of machine instruction. More... | |
| int8_t | numSrcRegs () const |
| Number of source registers. More... | |
| int8_t | numDestRegs () const |
| Number of destination registers. More... | |
| int8_t | numFPDestRegs () const |
| Number of floating-point destination regs. More... | |
| int8_t | numIntDestRegs () const |
| Number of integer destination regs. More... | |
| bool | isNop () const |
| bool | isMemRef () const |
| bool | isLoad () const |
| bool | isStore () const |
| bool | isStoreConditional () const |
| bool | isInstPrefetch () const |
| bool | isDataPrefetch () const |
| bool | isPrefetch () const |
| bool | isInteger () const |
| bool | isFloating () const |
| bool | isCC () const |
| bool | isControl () const |
| bool | isCall () const |
| bool | isReturn () const |
| bool | isDirectCtrl () const |
| bool | isIndirectCtrl () const |
| bool | isCondCtrl () const |
| bool | isUncondCtrl () const |
| bool | isCondDelaySlot () const |
| bool | isThreadSync () const |
| bool | isSerializing () const |
| bool | isSerializeBefore () const |
| bool | isSerializeAfter () const |
| bool | isSquashAfter () const |
| bool | isMemBarrier () const |
| bool | isWriteBarrier () const |
| bool | isNonSpeculative () const |
| bool | isQuiesce () const |
| bool | isIprAccess () const |
| bool | isUnverifiable () const |
| bool | isSyscall () const |
| bool | isMacroop () const |
| bool | isMicroop () const |
| bool | isDelayedCommit () const |
| bool | isLastMicroop () const |
| bool | isFirstMicroop () const |
| bool | isMicroBranch () const |
| Public Member Functions inherited from RefCounted | |
| RefCounted () | |
| We initialize the reference count to zero and the first object to take ownership of it must increment it to one. More... | |
| virtual | ~RefCounted () |
| We make the destructor virtual because we're likely to have virtual functions on reference counted objects. More... | |
| void | incref () |
| Increment the reference count. More... | |
| void | decref () |
| Decrement the reference count and destroy the object if all references are gone. More... | |
| Public Attributes inherited from StaticInst | |
| const ExtMachInst | machInst |
| The binary machine instruction. More... | |
| Static Public Attributes inherited from StaticInst | |
| static StaticInstPtr | nullStaticInstPtr |
| Pointer to a statically allocated "null" instruction object. More... | |
Base class for instructions whose disassembly is not purely a function of the machine instruction (i.e., it depends on the PC).
This class overrides the disassemble() method to check the PC and symbol table values before re-using a cached disassembly string. This is necessary for branches and jumps, where the disassembly string includes the target address (which may depend on the PC and/or symbol table).
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inlineprotected |
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protectedvirtual |
Return string representation of disassembled instruction.
The default version of this function will call the internal virtual generateDisassembly() function to get the string, then cache it in cachedDisassembly. If the disassembly should not be cached, this function should be overridden directly.
Reimplemented from StaticInst.
Definition at line 39 of file branch.cc.
References StaticInst::cachedDisassembly, cachedPC, cachedSymtab, PowerISA::PowerStaticInst::generateDisassembly(), and pc.
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mutableprotected |
Cached program counter from last disassembly.
Definition at line 52 of file branch.hh.
Referenced by disassemble().
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mutableprotected |
Cached symbol table pointer from last disassembly.
Definition at line 54 of file branch.hh.
Referenced by disassemble().