42 lines
1.6 KiB
C++
42 lines
1.6 KiB
C++
#include "transfer-opcode-handler-container.h"
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namespace emu_6502 {
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TransferOpcodeHandlerContainer::TransferOpcodeHandlerContainer() : OpcodeHandlerContainer() {
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handlers.insert({Op::TAX, [this](Machine& machine) {
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transfer(machine, machine.get_cpu().get_a(), machine.get_cpu().get_x());
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}});
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handlers.insert({Op::TAY, [this](Machine& machine) {
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transfer(machine, machine.get_cpu().get_a(), machine.get_cpu().get_y());
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}});
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handlers.insert({Op::TSX, [this](Machine& machine) {
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transfer(machine, machine.get_cpu().get_sp(), machine.get_cpu().get_x());
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}});
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handlers.insert({Op::TXA, [this](Machine& machine) {
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transfer(machine, machine.get_cpu().get_x(), machine.get_cpu().get_a());
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}});
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handlers.insert({Op::TXS, [this](Machine& machine) {
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transfer(machine, machine.get_cpu().get_x(), machine.get_cpu().get_sp(), true);
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}});
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handlers.insert({Op::TYA, [this](Machine& machine) {
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transfer(machine, machine.get_cpu().get_y(), machine.get_cpu().get_a());
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}});
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}
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void TransferOpcodeHandlerContainer::transfer(Machine& machine, const Register<uint8_t>& source,
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Register<uint8_t>& dest, bool ignoreFlags) {
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auto value = source.get_value();
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dest.set_value(value);
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if (!ignoreFlags) {
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auto& ps = machine.get_cpu().get_ps();
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ps.set_zero(value == 0);
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ps.set_negative((value & 0x80) == 0x80);
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}
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}
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} |