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Implement MOVS, STOS, revealing an issue in the memory handler.

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Thomas Harte
2023-10-20 21:46:47 -04:00
parent dab3dcaafb
commit 93e90b09a0
2 changed files with 45 additions and 1 deletions
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38
InstructionSets/x86/Implementation/PerformImplementation.hpp
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@@ -1417,6 +1417,38 @@ void lods(const InstructionT &instruction, AddressT &eCX, AddressT &eSI, IntT &e
repeat<AddressT>(instruction, eCX, flow_controller);
}
template <typename IntT, typename AddressT, typename InstructionT, typename MemoryT, typename FlowControllerT>
void movs(const InstructionT &instruction, AddressT &eCX, AddressT &eSI, AddressT &eDI, MemoryT &memory, Status &status, FlowControllerT &flow_controller) {
if(repetition_over<AddressT>(instruction, eCX)) {
return;
}
Source source_segment = instruction.segment_override();
if(source_segment == Source::None) source_segment = Source::DS;
memory.template access<IntT>(Source::ES, eDI) = memory.template access<IntT>(source_segment, eSI);
eSI += status.direction<AddressT>() * sizeof(IntT);
eDI += status.direction<AddressT>() * sizeof(IntT);
repeat<AddressT>(instruction, eCX, flow_controller);
}
template <typename IntT, typename AddressT, typename InstructionT, typename MemoryT, typename FlowControllerT>
void stos(const InstructionT &instruction, AddressT &eCX, AddressT &eDI, IntT &eAX, MemoryT &memory, Status &status, FlowControllerT &flow_controller) {
if(repetition_over<AddressT>(instruction, eCX)) {
return;
}
Source destination_segment = instruction.segment_override();
if(destination_segment == Source::None) destination_segment = Source::DS;
memory.template access<IntT>(destination_segment, eDI) = eAX;
eDI += status.direction<AddressT>() * sizeof(IntT);
repeat<AddressT>(instruction, eCX, flow_controller);
}
}
@@ -1664,6 +1696,12 @@ template <
case Operation::LODS:
Primitive::lods<IntT, AddressT>(instruction, eCX(), eSI(), pair_low(), memory, status, flow_controller);
break;
case Operation::MOVS:
Primitive::movs<IntT, AddressT>(instruction, eCX(), eSI(), eDI(), memory, status, flow_controller);
break;
case Operation::STOS:
Primitive::stos<IntT, AddressT>(instruction, eCX(), eDI(), pair_low(), memory, status, flow_controller);
break;
}
// Write to memory if required to complete this operation.