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>
Inheritance diagram for PowerISA::PCDependentDisassembly:
Protected Member Functions | |
| PCDependentDisassembly (const char *mnem, ExtMachInst _machInst, OpClass __opClass) | |
| Constructor. More... | |
| const std::string & | disassemble (Addr pc, const Loader::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, RegId reg) const |
| Print a register name for disassembly given the unique dependence tag number (FP or int). More... | |
| std::string | generateDisassembly (Addr pc, const Loader::SymbolTable *symtab) const override |
| Internal function to generate disassembly string. More... | |
| void | advancePC (PowerISA::PCState &pcState) const override |
| size_t | asBytes (void *buf, size_t max_size) override |
| Instruction classes can override this function to return a a representation of themselves as a blob of bytes, generally assumed to be that instructions ExtMachInst. More... | |
| Protected Member Functions inherited from StaticInst | |
| StaticInst (const char *_mnemonic, ExtMachInst _machInst, OpClass __opClass) | |
| Constructor. More... | |
| template<typename T > | |
| size_t | simpleAsBytes (void *buf, size_t max_size, const T &t) |
Protected Attributes | |
| Addr | cachedPC |
| Cached program counter from last disassembly. More... | |
| const Loader::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... | |
| 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 |
| int8_t | _numVecDestRegs |
| To use in architectures with vector register file. More... | |
| int8_t | _numVecElemDestRegs |
| int8_t | _numVecPredDestRegs |
| RegId | _destRegIdx [MaxInstDestRegs] |
| See destRegIdx(). More... | |
| RegId | _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... | |
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... | |
| Public Member Functions inherited from StaticInst | |
| 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... | |
| int8_t | numVecDestRegs () const |
| Number of vector destination regs. More... | |
| int8_t | numVecElemDestRegs () const |
| Number of vector element destination regs. More... | |
| int8_t | numVecPredDestRegs () const |
| Number of predicate destination regs. More... | |
| int8_t | numCCDestRegs () const |
| Number of coprocesor destination regs. More... | |
| bool | isNop () const |
| bool | isMemRef () const |
| bool | isLoad () const |
| bool | isStore () const |
| bool | isAtomic () const |
| bool | isStoreConditional () const |
| bool | isInstPrefetch () const |
| bool | isDataPrefetch () const |
| bool | isPrefetch () const |
| bool | isInteger () const |
| bool | isFloating () const |
| bool | isVector () 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 |
| bool | isHtmStart () const |
| bool | isHtmStop () const |
| bool | isHtmCancel () const |
| bool | isHtmCmd () const |
| void | setFirstMicroop () |
| void | setLastMicroop () |
| void | setDelayedCommit () |
| void | setFlag (Flags f) |
| OpClass | opClass () const |
| Operation class. Used to select appropriate function unit in issue. More... | |
| const RegId & | destRegIdx (int i) const |
| Return logical index (architectural reg num) of i'th destination reg. More... | |
| const RegId & | srcRegIdx (int i) const |
| Return logical index (architectural reg num) of i'th source reg. More... | |
| virtual | ~StaticInst () |
| virtual Fault | execute (ExecContext *xc, Trace::InstRecord *traceData) const =0 |
| 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... | |
| 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 () const |
| Increment the reference count. More... | |
| void | decref () const |
| 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... | |
| static StaticInstPtr | nopStaticInstPtr = new NopStaticInst |
| Pointer to a statically allocated generic "nop" instruction object. More... | |
Detailed Description
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).
Constructor & Destructor Documentation
◆ PCDependentDisassembly()
|
inlineprotected |
Member Function Documentation
◆ disassemble()
|
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 37 of file branch.cc.
References StaticInst::cachedDisassembly, cachedPC, cachedSymtab, PowerISA::PowerStaticInst::generateDisassembly(), and MipsISA::pc.
Member Data Documentation
◆ cachedPC
|
mutableprotected |
Cached program counter from last disassembly.
Definition at line 50 of file branch.hh.
Referenced by disassemble().
◆ cachedSymtab
|
mutableprotected |
Cached symbol table pointer from last disassembly.
Definition at line 52 of file branch.hh.
Referenced by disassemble().
The documentation for this class was generated from the following files: