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Minor style improvements; especially: don't assume value of NoBusProgram.

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This commit is contained in:
Thomas Harte 2021-12-25 14:05:38 -05:00
parent f20940a37b
commit ee625cb8a8
1 changed files with 8 additions and 6 deletions
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14
Processors/68000/Implementation/68000Storage.hpp
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@ -326,22 +326,24 @@ class ProcessorStorage {
// steps detail appropriately.
PrepareINTVector,
};
static constexpr int SourceMask = 1 << 7;
static_assert(uint8_t(Action::PrepareINTVector) < 32); // i.e. will fit into five bits.
static constexpr int SourceMask = 1 << 5;
static constexpr int DestinationMask = 1 << 6;
uint8_t action = uint8_t(Action::None);
uint8_t action = uint8_t(Action::None); // Requires 7 bits at present; sizeof(Action) + the two flags above.
static constexpr uint16_t NoBusProgram = std::numeric_limits<uint16_t>::max();
uint16_t bus_program = NoBusProgram;
uint16_t bus_program = NoBusProgram; // Empirically requires 11 bits at present.
MicroOp() {}
MicroOp(uint8_t action) : action(action) {}
MicroOp(): action(uint8_t(Action::None)), bus_program(NoBusProgram) {}
MicroOp(uint8_t action) : action(action), bus_program(NoBusProgram) {}
MicroOp(uint8_t action, uint16_t bus_program) : action(action), bus_program(bus_program) {}
MicroOp(Action action) : MicroOp(uint8_t(action)) {}
MicroOp(Action action, uint16_t bus_program) : MicroOp(uint8_t(action), bus_program) {}
forceinline bool is_terminal() const {
return bus_program == std::numeric_limits<uint16_t>::max();
return bus_program == NoBusProgram;
}
};