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author | Gabe Black <gblack@eecs.umich.edu> | 2010-06-02 12:58:02 -0500 |
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committer | Gabe Black <gblack@eecs.umich.edu> | 2010-06-02 12:58:02 -0500 |
commit | 769f3406fe6264353be1d3f61291c5aba6328534 (patch) | |
tree | 4627469fa354546f81306ddc54cc8cb015812d08 /src/arch/arm/insts/static_inst.hh | |
parent | b6e7029dd59fa9508835a5af7696c93785a00d87 (diff) | |
download | gem5-769f3406fe6264353be1d3f61291c5aba6328534.tar.xz |
ARM: Replace the interworking branch base class with a special operand.
Diffstat (limited to 'src/arch/arm/insts/static_inst.hh')
-rw-r--r-- | src/arch/arm/insts/static_inst.hh | 52 |
1 files changed, 22 insertions, 30 deletions
diff --git a/src/arch/arm/insts/static_inst.hh b/src/arch/arm/insts/static_inst.hh index 59d7fe705..485d6997e 100644 --- a/src/arch/arm/insts/static_inst.hh +++ b/src/arch/arm/insts/static_inst.hh @@ -47,7 +47,7 @@ namespace ArmISA { -class ArmStaticInstBase : public StaticInst +class ArmStaticInst : public StaticInst { protected: int32_t shift_rm_imm(uint32_t base, uint32_t shamt, @@ -61,8 +61,8 @@ class ArmStaticInstBase : public StaticInst uint32_t type, uint32_t cfval) const; // Constructor - ArmStaticInstBase(const char *mnem, ExtMachInst _machInst, - OpClass __opClass) + ArmStaticInst(const char *mnem, ExtMachInst _machInst, + OpClass __opClass) : StaticInst(mnem, _machInst, __opClass) { } @@ -151,6 +151,7 @@ class ArmStaticInstBase : public StaticInst return pc + 8; } + // Perform an regular branch. template<class XC> static void setNextPC(XC *xc, Addr val) @@ -158,36 +159,11 @@ class ArmStaticInstBase : public StaticInst xc->setNextPC((xc->readNextPC() & PcModeMask) | (val & ~PcModeMask)); } -}; - -class ArmStaticInst : public ArmStaticInstBase -{ - protected: - ArmStaticInst(const char *mnem, ExtMachInst _machInst, OpClass __opClass) - : ArmStaticInstBase(mnem, _machInst, __opClass) - { - } + // Perform an interworking branch. template<class XC> static void - setNextPC(XC *xc, Addr val) - { - xc->setNextPC((xc->readNextPC() & PcModeMask) | - (val & ~PcModeMask)); - } -}; - -class ArmInterWorking : public ArmStaticInstBase -{ - protected: - ArmInterWorking(const char *mnem, ExtMachInst _machInst, OpClass __opClass) - : ArmStaticInstBase(mnem, _machInst, __opClass) - { - } - - template<class XC> - static void - setNextPC(XC *xc, Addr val) + setIWNextPC(XC *xc, Addr val) { Addr stateBits = xc->readPC() & PcModeMask; Addr jBit = (ULL(1) << PcJBitShift); @@ -214,6 +190,22 @@ class ArmInterWorking : public ArmStaticInstBase newPc = newPc | stateBits; xc->setNextPC(newPc); } + + // Perform an interworking branch in ARM mode, a regular branch + // otherwise. + template<class XC> + static void + setAIWNextPC(XC *xc, Addr val) + { + Addr stateBits = xc->readPC() & PcModeMask; + Addr jBit = (ULL(1) << PcJBitShift); + Addr tBit = (ULL(1) << PcTBitShift); + if (!jBit && !tBit) { + setIWNextPC(xc, val); + } else { + setNextPC(xc, val); + } + } }; } |