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author | Gabe Black <gblack@eecs.umich.edu> | 2010-06-02 12:58:10 -0500 |
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committer | Gabe Black <gblack@eecs.umich.edu> | 2010-06-02 12:58:10 -0500 |
commit | ec4cd00b1101d7436ff2019dfc9fc1c09442c9c9 (patch) | |
tree | 9bf1a2f687e2103d6f099a0e421a641717b3b45a /src/arch/arm/insts | |
parent | 1ada9d48802ad2bccb1c1d9269797778198038fd (diff) | |
download | gem5-ec4cd00b1101d7436ff2019dfc9fc1c09442c9c9.tar.xz |
ARM: Add a base class for the RFE instruction.
Diffstat (limited to 'src/arch/arm/insts')
-rw-r--r-- | src/arch/arm/insts/mem.cc | 25 | ||||
-rw-r--r-- | src/arch/arm/insts/mem.hh | 24 |
2 files changed, 49 insertions, 0 deletions
diff --git a/src/arch/arm/insts/mem.cc b/src/arch/arm/insts/mem.cc index 521499847..394c159d1 100644 --- a/src/arch/arm/insts/mem.cc +++ b/src/arch/arm/insts/mem.cc @@ -62,6 +62,31 @@ Swap::generateDisassembly(Addr pc, const SymbolTable *symtab) const return ss.str(); } +string +RfeOp::generateDisassembly(Addr pc, const SymbolTable *symtab) const +{ + stringstream ss; + switch (mode) { + case DecrementAfter: + printMnemonic(ss, "da"); + break; + case DecrementBefore: + printMnemonic(ss, "db"); + break; + case IncrementAfter: + printMnemonic(ss, "ia"); + break; + case IncrementBefore: + printMnemonic(ss, "ib"); + break; + } + printReg(ss, base); + if (wb) { + ss << "!"; + } + return ss.str(); +} + void Memory::printInst(std::ostream &os, AddrMode addrMode) const { diff --git a/src/arch/arm/insts/mem.hh b/src/arch/arm/insts/mem.hh index dc4b7d627..d5b5d3519 100644 --- a/src/arch/arm/insts/mem.hh +++ b/src/arch/arm/insts/mem.hh @@ -63,6 +63,30 @@ class Swap : public PredOp std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const; }; +// The address is a base register plus an immediate. +class RfeOp : public PredOp +{ + public: + enum AddrMode { + DecrementAfter, + DecrementBefore, + IncrementAfter, + IncrementBefore + }; + protected: + IntRegIndex base; + AddrMode mode; + bool wb; + + RfeOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass, + IntRegIndex _base, AddrMode _mode, bool _wb) + : PredOp(mnem, _machInst, __opClass), + base(_base), mode(_mode), wb(_wb) + {} + + std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const; +}; + class Memory : public PredOp { public: |