mirror of https://github.com/bsnes-emu/bsnes.git
92 lines
1.9 KiB
C++
92 lines
1.9 KiB
C++
template<> auto M68K::read<Byte>(uint32 addr) -> uint32 {
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step(4);
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return bus->readByte(addr);
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}
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template<> auto M68K::read<Word>(uint32 addr) -> uint32 {
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step(4);
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return bus->readWord(addr);
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}
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template<> auto M68K::read<Long>(uint32 addr) -> uint32 {
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step(4);
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uint32 data = bus->readWord(addr + 0) << 16;
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step(4);
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return data | bus->readWord(addr + 2) << 0;
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}
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//
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template<> auto M68K::write<Byte>(uint32 addr, uint32 data) -> void {
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step(4);
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return bus->writeByte(addr, data);
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}
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template<> auto M68K::write<Word>(uint32 addr, uint32 data) -> void {
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step(4);
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return bus->writeWord(addr, data);
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}
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template<> auto M68K::write<Long>(uint32 addr, uint32 data) -> void {
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step(4);
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bus->writeWord(addr + 0, data >> 16);
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step(4);
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bus->writeWord(addr + 2, data >> 0);
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}
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template<> auto M68K::write<Byte, Reverse>(uint32 addr, uint32 data) -> void {
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step(4);
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return bus->writeByte(addr, data);
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}
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template<> auto M68K::write<Word, Reverse>(uint32 addr, uint32 data) -> void {
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step(4);
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return bus->writeWord(addr, data);
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}
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template<> auto M68K::write<Long, Reverse>(uint32 addr, uint32 data) -> void {
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step(4);
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bus->writeWord(addr + 2, data >> 0);
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step(4);
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bus->writeWord(addr + 0, data >> 16);
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}
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//
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template<> auto M68K::readPC<Byte>() -> uint32 {
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step(4);
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auto data = bus->readWord(r.pc);
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r.pc += 2;
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return (uint8)data;
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}
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template<> auto M68K::readPC<Word>() -> uint32 {
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step(4);
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auto data = bus->readWord(r.pc);
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r.pc += 2;
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return data;
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}
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template<> auto M68K::readPC<Long>() -> uint32 {
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step(4);
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auto hi = bus->readWord(r.pc);
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r.pc += 2;
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step(4);
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auto lo = bus->readWord(r.pc);
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r.pc += 2;
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return hi << 16 | lo << 0;
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}
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//
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template<uint Size> auto M68K::pop() -> uint32 {
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auto data = read<Size>((uint32)r.a[7]);
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r.a[7] += bytes<Size>();
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return data;
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}
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template<uint Size> auto M68K::push(uint32 data) -> void {
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r.a[7] -= bytes<Size>();
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return write<Size, Reverse>((uint32)r.a[7], data);
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}
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