mirror of https://github.com/bsnes-emu/bsnes.git
54 lines
1.4 KiB
C++
54 lines
1.4 KiB
C++
auto V30MZ::repeat() -> uint8 {
|
|
for(auto prefix : prefixes) {
|
|
if(prefix == RepeatWhileZero) return prefix;
|
|
if(prefix == RepeatWhileNotZero) return prefix;
|
|
}
|
|
return {};
|
|
}
|
|
|
|
auto V30MZ::segment(uint16 segment) -> uint16 {
|
|
for(auto prefix : prefixes) {
|
|
if(prefix == SegmentOverrideES) return r.es;
|
|
if(prefix == SegmentOverrideCS) return r.cs;
|
|
if(prefix == SegmentOverrideSS) return r.ss;
|
|
if(prefix == SegmentOverrideDS) return r.ds;
|
|
}
|
|
return segment;
|
|
}
|
|
|
|
auto V30MZ::getAcc(Size size) -> uint32 {
|
|
if(size == Byte) return r.al;
|
|
if(size == Word) return r.ax;
|
|
if(size == Long) return r.dx << 16 | r.ax;
|
|
unreachable;
|
|
}
|
|
|
|
auto V30MZ::setAcc(Size size, uint32 data) -> void {
|
|
if(size == Byte) r.al = data;
|
|
if(size == Word) r.ax = data;
|
|
if(size == Long) r.ax = data, r.dx = data >> 16;
|
|
}
|
|
|
|
//
|
|
|
|
V30MZ::Registers::Flags::operator uint16_t() const {
|
|
return m << 15 | 1 << 14 | 1 << 13 | 1 << 12
|
|
| v << 11 | d << 10 | i << 9 | b << 8
|
|
| s << 7 | z << 6 | h << 4 | p << 2
|
|
| 1 << 1 | c << 0;
|
|
}
|
|
|
|
auto V30MZ::Registers::Flags::operator=(uint16_t data) {
|
|
m = (uint1)(data >> 15);
|
|
v = (uint1)(data >> 11);
|
|
d = (uint1)(data >> 10);
|
|
i = (uint1)(data >> 9);
|
|
b = (uint1)(data >> 8);
|
|
s = (uint1)(data >> 7);
|
|
z = (uint1)(data >> 6);
|
|
h = (uint1)(data >> 4);
|
|
p = (uint1)(data >> 2);
|
|
c = (uint1)(data >> 0);
|
|
return *this;
|
|
}
|