mirror of https://github.com/bsnes-emu/bsnes.git
81 lines
3.0 KiB
C++
81 lines
3.0 KiB
C++
struct Flags {
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union {
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uint8_t b = 0;
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BooleanBitField<uint8_t, 7> n;
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BooleanBitField<uint8_t, 6> v;
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BooleanBitField<uint8_t, 5> m;
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BooleanBitField<uint8_t, 4> x;
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BooleanBitField<uint8_t, 3> d;
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BooleanBitField<uint8_t, 2> i;
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BooleanBitField<uint8_t, 1> z;
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BooleanBitField<uint8_t, 0> c;
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};
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inline operator uint() const { return b; }
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inline auto operator =(uint value) -> uint { return b = value; }
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inline auto operator&=(uint value) -> uint { return b &= value; }
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inline auto operator|=(uint value) -> uint { return b |= value; }
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};
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struct Reg16 {
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union {
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uint16_t w = 0;
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NaturalBitField<uint16_t, 0, 7> l;
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NaturalBitField<uint16_t, 8, 15> h;
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};
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inline operator uint() const { return w; }
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inline auto operator =(uint value) -> uint { return w = value; }
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inline auto operator |=(uint value) -> uint { return w |= value; }
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inline auto operator ^=(uint value) -> uint { return w ^= value; }
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inline auto operator &=(uint value) -> uint { return w &= value; }
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inline auto operator<<=(uint value) -> uint { return w <<= value; }
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inline auto operator>>=(uint value) -> uint { return w >>= value; }
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inline auto operator +=(uint value) -> uint { return w += value; }
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inline auto operator -=(uint value) -> uint { return w -= value; }
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inline auto operator *=(uint value) -> uint { return w *= value; }
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inline auto operator /=(uint value) -> uint { return w /= value; }
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inline auto operator %=(uint value) -> uint { return w %= value; }
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};
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struct Reg24 {
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union {
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uint32_t d = 0;
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NaturalBitField<uint32_t, 0, 7> l;
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NaturalBitField<uint32_t, 8, 15> h;
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NaturalBitField<uint32_t, 16, 23> b;
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NaturalBitField<uint32_t, 0, 15> w;
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};
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inline operator uint() const { return d; }
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inline auto operator =(uint value) -> uint { return d = uint24( value); }
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inline auto operator |=(uint value) -> uint { return d = uint24(d | value); }
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inline auto operator ^=(uint value) -> uint { return d = uint24(d ^ value); }
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inline auto operator &=(uint value) -> uint { return d = uint24(d & value); }
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inline auto operator<<=(uint value) -> uint { return d = uint24(d << value); }
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inline auto operator>>=(uint value) -> uint { return d = uint24(d >> value); }
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inline auto operator +=(uint value) -> uint { return d = uint24(d + value); }
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inline auto operator -=(uint value) -> uint { return d = uint24(d - value); }
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inline auto operator *=(uint value) -> uint { return d = uint24(d * value); }
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inline auto operator /=(uint value) -> uint { return d = uint24(d / value); }
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inline auto operator %=(uint value) -> uint { return d = uint24(d % value); }
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};
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struct Registers {
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Reg24 pc;
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Reg16 a;
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Reg16 x;
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Reg16 y;
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Reg16 z; //pseudo-register (zero register)
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Reg16 s;
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Reg16 d;
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Flags p;
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uint8 db = 0;
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bool e = false;
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bool irq = false; //IRQ pin (0 = low, 1 = trigger)
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bool wai = false; //raised during wai, cleared after interrupt triggered
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uint8 mdr = 0; //memory data register
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uint16 vector = 0; //interrupt vector address
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};
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