mirror of https://github.com/bsnes-emu/bsnes.git
84 lines
3.1 KiB
C++
84 lines
3.1 KiB
C++
struct flag_t {
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bool n, v, m, x, d, i, z, c;
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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 unsigned operator=(uint8 data) {
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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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inline unsigned operator|=(unsigned data) { return operator=(operator unsigned() | data); }
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inline unsigned operator^=(unsigned data) { return operator=(operator unsigned() ^ data); }
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inline unsigned operator&=(unsigned data) { return operator=(operator unsigned() & data); }
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flag_t() : n(0), v(0), m(0), x(0), d(0), i(0), z(0), c(0) {}
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};
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struct reg16_t {
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union {
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uint16 w;
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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 unsigned operator = (unsigned i) { return w = i; }
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inline unsigned operator |= (unsigned i) { return w |= i; }
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inline unsigned operator ^= (unsigned i) { return w ^= i; }
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inline unsigned operator &= (unsigned i) { return w &= i; }
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inline unsigned operator <<= (unsigned i) { return w <<= i; }
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inline unsigned operator >>= (unsigned i) { return w >>= i; }
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inline unsigned operator += (unsigned i) { return w += i; }
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inline unsigned operator -= (unsigned i) { return w -= i; }
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inline unsigned operator *= (unsigned i) { return w *= i; }
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inline unsigned operator /= (unsigned i) { return w /= i; }
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inline unsigned operator %= (unsigned i) { return w %= i; }
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reg16_t() : w(0) {}
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};
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struct reg24_t {
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union {
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uint32 d;
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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 unsigned operator = (unsigned i) { return d = uclip<24>(i); }
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inline unsigned operator |= (unsigned i) { return d = uclip<24>(d | i); }
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inline unsigned operator ^= (unsigned i) { return d = uclip<24>(d ^ i); }
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inline unsigned operator &= (unsigned i) { return d = uclip<24>(d & i); }
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inline unsigned operator <<= (unsigned i) { return d = uclip<24>(d << i); }
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inline unsigned operator >>= (unsigned i) { return d = uclip<24>(d >> i); }
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inline unsigned operator += (unsigned i) { return d = uclip<24>(d + i); }
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inline unsigned operator -= (unsigned i) { return d = uclip<24>(d - i); }
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inline unsigned operator *= (unsigned i) { return d = uclip<24>(d * i); }
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inline unsigned operator /= (unsigned i) { return d = uclip<24>(d / i); }
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inline unsigned operator %= (unsigned i) { return d = uclip<24>(d % i); }
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reg24_t() : d(0) {}
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};
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struct regs_t {
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reg24_t pc;
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reg16_t r[6], &a, &x, &y, &z, &s, &d;
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flag_t p;
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uint8 db;
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bool e;
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bool irq; //IRQ pin (0 = low, 1 = trigger)
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bool wai; //raised during wai, cleared after interrupt triggered
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uint8 mdr; //memory data register
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uint16 vector; //interrupt vector address
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regs_t():
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a(r[0]), x(r[1]), y(r[2]), z(r[3]), s(r[4]), d(r[5]), db(0), e(false), irq(false), wai(false), mdr(0), vector(0) {
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z = 0;
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}
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};
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