2 * Copyright (c) 2010 ARM Limited
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14 * Copyright (c) 2007-2008 The Florida State University
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40 * Authors: Stephen Hines
42 #ifndef __ARCH_ARM_INSTS_PREDINST_HH__
43 #define __ARCH_ARM_INSTS_PREDINST_HH__
45 #include "arch/arm/insts/static_inst.hh"
46 #include "base/trace.hh"
50 static inline uint32_t
51 rotate_imm(uint32_t immValue, int rotateValue)
53 return ((immValue >> (rotateValue & 31)) |
54 (immValue << (32 - (rotateValue & 31))));
58 * Base class for predicated integer operations.
60 class PredOp : public ArmStaticInst
64 ConditionCode condCode;
67 PredOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
68 ArmStaticInst(mnem, _machInst, __opClass),
69 condCode((ConditionCode)(unsigned)machInst.condCode)
75 * Base class for predicated immediate operations.
77 class PredImmOpBase : public PredOp
83 uint32_t rotated_carry;
86 PredImmOpBase(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
87 PredOp(mnem, _machInst, __opClass),
88 imm(machInst.imm), rotated_imm(0), rotated_carry(0)
92 std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
96 * Base class for regular predicated immediate operations.
98 class PredImmOp : public PredImmOpBase
105 PredImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
106 PredImmOpBase(mnem, _machInst, __opClass),
107 rotate(machInst.rotate << 1)
109 rotated_imm = rotate_imm(imm, rotate);
111 rotated_carry = bits(rotated_imm, 31);
116 * Base class for modified predicated immediate operations.
118 class PredModImmOp : public PredImmOpBase
127 PredModImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
128 PredImmOpBase(mnem, _machInst, __opClass),
129 ctrlImm(bits(machInst.instBits, 26) << 3 |
130 bits(machInst.instBits, 14, 12)),
131 dataImm(bits(machInst.instBits, 7, 0))
133 rotated_imm = modified_imm(ctrlImm, dataImm);
134 rotated_carry = bits(rotated_imm, 31);
139 * Base class for predicated integer operations.
141 class PredIntOp : public PredOp
149 PredIntOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
150 PredOp(mnem, _machInst, __opClass),
151 shift_size(machInst.shiftSize), shift(machInst.shift)
155 std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
159 * Base class for predicated macro-operations.
161 class PredMacroOp : public PredOp
165 uint32_t numMicroops;
166 StaticInstPtr * microOps;
169 PredMacroOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
170 PredOp(mnem, _machInst, __opClass),
173 // We rely on the subclasses of this object to handle the
174 // initialization of the micro-operations, since they are
175 // all of variable length
176 flags[IsMacroop] = true;
186 fetchMicroop(MicroPC microPC)
188 assert(microPC < numMicroops);
189 return microOps[microPC];
192 std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
196 * Base class for predicated micro-operations.
198 class PredMicroop : public PredOp
201 PredMicroop(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
202 PredOp(mnem, _machInst, __opClass)
204 flags[IsMicroop] = true;
209 #endif //__ARCH_ARM_INSTS_PREDINST_HH__