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Implements the bitwise operators.

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This commit is contained in:
Thomas Harte 2020-10-06 20:17:03 -04:00
parent 9ce9167e3c
commit ebff83018e
1 changed files with 21 additions and 1 deletions
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22
Processors/65816/Implementation/65816Implementation.hpp
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@ -293,6 +293,7 @@ template <typename BusHandler> void Processor<BusHandler>::run_for(const Cycles
#define m_top() (instruction_buffer_.value >> m_shift_) & 0xff
#define x_top() (x_.full >> x_shift_) & 0xff
#define y_top() (y_.full >> x_shift_) & 0xff
#define a_top() (a_.full >> m_shift_) & 0xff
case OperationPerform:
switch(active_instruction_->operation) {
@ -443,10 +444,28 @@ template <typename BusHandler> void Processor<BusHandler>::run_for(const Cycles
flags_.set_nz(y_top());
} break;
//
// Bitwise operations.
//
case AND:
a_.full &= instruction_buffer_.value | m_masks_[0];
flags_.set_nz(a_top());
break;
case EOR:
a_.full ^= instruction_buffer_.value;
flags_.set_nz(a_top());
break;
case ORA:
a_.full |= instruction_buffer_.value;
flags_.set_nz(a_top());
break;
// TODO:
// ADC, AND, BIT, CMP, CPX, CPY, EOR, ORA, SBC,
// ADC, BIT, CMP, CPX, CPY, SBC,
// PLP,
// PHB, PHP, PHD, PHK,
// ASL, LSR, ROL, ROR, TRB, TSB,
@ -473,6 +492,7 @@ template <typename BusHandler> void Processor<BusHandler>::run_for(const Cycles
#undef m_top
#undef x_top
#undef y_top
#undef a_top
number_of_cycles -= bus_handler_.perform_bus_operation(bus_operation, bus_address, bus_value);
}