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Add TODO.

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Thomas Harte
2023-10-10 12:43:41 -04:00
parent dbf7d07609
commit 3d08953103
1 changed files with 4 additions and 0 deletions
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4
InstructionSets/x86/Instruction.hpp
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@@ -479,6 +479,10 @@ constexpr bool supports(Operation operation, Repetition repetition) {
case Operation::STOS: case Operation::STOS:
return true; return true;
// TODO: my new understanding is that the 8086 and 8088 recognise rep and repne on
// IDIV — and possibly DIV — as a quirk, affecting the outcome (possibly negativing the result?).
// So the test below should be a function of model, if I come to a conclusion about whether I'm
// going for fidelity to the instruction set as generally implemented, or to Intel's specific implementation.
case Operation::IDIV: case Operation::IDIV:
return repetition == Repetition::RepNE; return repetition == Repetition::RepNE;
} }