gem5  v20.0.0.3
microop.cc
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37 
38 #include "arch/x86/insts/microop.hh"
39 
40 #include "arch/x86/regs/misc.hh"
41 
42 namespace X86ISA
43 {
44 
45  bool X86MicroopBase::checkCondition(uint64_t flags, int condition) const
46  {
47  CCFlagBits ccflags = flags;
48  switch(condition)
49  {
50  case ConditionTests::True:
51  return true;
52  case ConditionTests::ECF:
53  return ccflags.ecf;
54  case ConditionTests::EZF:
55  return ccflags.ezf;
56  case ConditionTests::SZnZF:
57  return !(!ccflags.ezf && ccflags.zf);
58  case ConditionTests::MSTRZ:
59  panic("This condition is not implemented!");
60  case ConditionTests::STRZ:
61  panic("This condition is not implemented!");
62  case ConditionTests::MSTRC:
63  panic("This condition is not implemented!");
64  case ConditionTests::STRZnEZF:
65  return !ccflags.ezf && ccflags.zf;
66  //And no interrupts or debug traps are waiting
67  case ConditionTests::OF:
68  return ccflags.of;
69  case ConditionTests::CF:
70  return ccflags.cf;
71  case ConditionTests::ZF:
72  return ccflags.zf;
73  case ConditionTests::CvZF:
74  return ccflags.cf | ccflags.zf;
75  case ConditionTests::SF:
76  return ccflags.sf;
77  case ConditionTests::PF:
78  return ccflags.pf;
79  case ConditionTests::SxOF:
80  return ccflags.sf ^ ccflags.of;
81  case ConditionTests::SxOvZF:
82  return (ccflags.sf ^ ccflags.of) | ccflags.zf;
83  case ConditionTests::False:
84  return false;
85  case ConditionTests::NotECF:
86  return !ccflags.ecf;
87  case ConditionTests::NotEZF:
88  return !ccflags.ezf;
89  case ConditionTests::NotSZnZF:
90  return !ccflags.ezf && ccflags.zf;
91  case ConditionTests::NotMSTRZ:
92  panic("This condition is not implemented!");
93  case ConditionTests::NotSTRZ:
94  panic("This condition is not implemented!");
95  case ConditionTests::NotMSTRC:
96  panic("This condition is not implemented!");
97  case ConditionTests::STRnZnEZF:
98  return !ccflags.ezf && !ccflags.zf;
99  //And no interrupts or debug traps are waiting
100  case ConditionTests::NotOF:
101  return !ccflags.of;
102  case ConditionTests::NotCF:
103  return !ccflags.cf;
104  case ConditionTests::NotZF:
105  return !ccflags.zf;
106  case ConditionTests::NotCvZF:
107  return !(ccflags.cf | ccflags.zf);
108  case ConditionTests::NotSF:
109  return !ccflags.sf;
110  case ConditionTests::NotPF:
111  return !ccflags.pf;
112  case ConditionTests::NotSxOF:
113  return !(ccflags.sf ^ ccflags.of);
114  case ConditionTests::NotSxOvZF:
115  return !((ccflags.sf ^ ccflags.of) | ccflags.zf);
116  }
117  panic("Unknown condition: %d\n", condition);
118  return true;
119  }
120 }
panic
#define panic(...)
This implements a cprintf based panic() function.
Definition: logging.hh:163
StaticInst::flags
std::bitset< Num_Flags > flags
Flag values for this instruction.
Definition: static_inst.hh:99
X86ISA
This is exposed globally, independent of the ISA.
Definition: acpi.hh:55
X86ISA::X86MicroopBase::checkCondition
bool checkCondition(uint64_t flags, int condition) const
Definition: microop.cc:45
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