mirror of https://github.com/bsnes-emu/bsnes.git
81 lines
2.9 KiB
C++
81 lines
2.9 KiB
C++
struct flag_t {
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bool n{0};
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bool v{0};
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bool m{0};
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bool x{0};
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bool d{0};
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bool i{0};
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bool z{0};
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bool c{0};
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inline operator unsigned() const {
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return (n << 7) + (v << 6) + (m << 5) + (x << 4)
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+ (d << 3) + (i << 2) + (z << 1) + (c << 0);
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}
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inline auto operator=(uint8 data) -> unsigned {
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n = data & 0x80; v = data & 0x40; m = data & 0x20; x = data & 0x10;
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d = data & 0x08; i = data & 0x04; z = data & 0x02; c = data & 0x01;
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return data;
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}
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};
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struct reg16_t {
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union {
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uint16 w = 0;
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struct { uint8 order_lsb2(l, h); };
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};
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inline operator unsigned() const { return w; }
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inline auto operator = (unsigned i) -> unsigned { return w = i; }
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inline auto operator |= (unsigned i) -> unsigned { return w |= i; }
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inline auto operator ^= (unsigned i) -> unsigned { return w ^= i; }
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inline auto operator &= (unsigned i) -> unsigned { return w &= i; }
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inline auto operator <<= (unsigned i) -> unsigned { return w <<= i; }
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inline auto operator >>= (unsigned i) -> unsigned { return w >>= i; }
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inline auto operator += (unsigned i) -> unsigned { return w += i; }
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inline auto operator -= (unsigned i) -> unsigned { return w -= i; }
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inline auto operator *= (unsigned i) -> unsigned { return w *= i; }
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inline auto operator /= (unsigned i) -> unsigned { return w /= i; }
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inline auto operator %= (unsigned i) -> unsigned { return w %= i; }
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};
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struct reg24_t {
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union {
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uint32 d = 0;
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struct { uint16 order_lsb2(w, wh); };
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struct { uint8 order_lsb4(l, h, b, bh); };
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};
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inline operator unsigned() const { return d; }
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inline auto operator = (unsigned i) -> unsigned { return d = uclip<24>(i); }
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inline auto operator |= (unsigned i) -> unsigned { return d = uclip<24>(d | i); }
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inline auto operator ^= (unsigned i) -> unsigned { return d = uclip<24>(d ^ i); }
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inline auto operator &= (unsigned i) -> unsigned { return d = uclip<24>(d & i); }
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inline auto operator <<= (unsigned i) -> unsigned { return d = uclip<24>(d << i); }
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inline auto operator >>= (unsigned i) -> unsigned { return d = uclip<24>(d >> i); }
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inline auto operator += (unsigned i) -> unsigned { return d = uclip<24>(d + i); }
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inline auto operator -= (unsigned i) -> unsigned { return d = uclip<24>(d - i); }
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inline auto operator *= (unsigned i) -> unsigned { return d = uclip<24>(d * i); }
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inline auto operator /= (unsigned i) -> unsigned { return d = uclip<24>(d / i); }
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inline auto operator %= (unsigned i) -> unsigned { return d = uclip<24>(d % i); }
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};
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struct regs_t {
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reg24_t pc;
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reg16_t a;
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reg16_t x;
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reg16_t y;
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reg16_t z; //pseudo-register (zero register)
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reg16_t s;
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reg16_t d;
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flag_t p;
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uint8 db{0};
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bool e{0};
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bool irq{0}; //IRQ pin (0 = low, 1 = trigger)
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bool wai{0}; //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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