cpuregs.hpp 2.8 KB

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374
  1. struct flag_t {
  2. bool n, v, m, x, d, i, z, c;
  3. inline operator unsigned() const {
  4. return (n << 7) + (v << 6) + (m << 5) + (x << 4)
  5. + (d << 3) + (i << 2) + (z << 1) + (c << 0);
  6. }
  7. inline unsigned operator=(uint8_t data) {
  8. n = data & 0x80; v = data & 0x40; m = data & 0x20; x = data & 0x10;
  9. d = data & 0x08; i = data & 0x04; z = data & 0x02; c = data & 0x01;
  10. return data;
  11. }
  12. inline unsigned operator|=(unsigned data) { return operator=(operator unsigned() | data); }
  13. inline unsigned operator^=(unsigned data) { return operator=(operator unsigned() ^ data); }
  14. inline unsigned operator&=(unsigned data) { return operator=(operator unsigned() & data); }
  15. flag_t() : n(0), v(0), m(0), x(0), d(0), i(0), z(0), c(0) {}
  16. };
  17. struct reg16_t {
  18. union {
  19. uint16 w;
  20. struct { uint8 order_lsb2(l, h); };
  21. };
  22. inline operator unsigned() const { return w; }
  23. inline unsigned operator = (unsigned i) { return w = i; }
  24. inline unsigned operator |= (unsigned i) { return w |= i; }
  25. inline unsigned operator ^= (unsigned i) { return w ^= i; }
  26. inline unsigned operator &= (unsigned i) { return w &= i; }
  27. inline unsigned operator <<= (unsigned i) { return w <<= i; }
  28. inline unsigned operator >>= (unsigned i) { return w >>= i; }
  29. inline unsigned operator += (unsigned i) { return w += i; }
  30. inline unsigned operator -= (unsigned i) { return w -= i; }
  31. inline unsigned operator *= (unsigned i) { return w *= i; }
  32. inline unsigned operator /= (unsigned i) { return w /= i; }
  33. inline unsigned operator %= (unsigned i) { return w %= i; }
  34. reg16_t() : w(0) {}
  35. };
  36. struct reg24_t {
  37. union {
  38. uint32 d;
  39. struct { uint16 order_lsb2(w, wh); };
  40. struct { uint8 order_lsb4(l, h, b, bh); };
  41. };
  42. inline operator unsigned() const { return d; }
  43. inline unsigned operator = (unsigned i) { return d = uclip<24>(i); }
  44. inline unsigned operator |= (unsigned i) { return d = uclip<24>(d | i); }
  45. inline unsigned operator ^= (unsigned i) { return d = uclip<24>(d ^ i); }
  46. inline unsigned operator &= (unsigned i) { return d = uclip<24>(d & i); }
  47. inline unsigned operator <<= (unsigned i) { return d = uclip<24>(d << i); }
  48. inline unsigned operator >>= (unsigned i) { return d = uclip<24>(d >> i); }
  49. inline unsigned operator += (unsigned i) { return d = uclip<24>(d + i); }
  50. inline unsigned operator -= (unsigned i) { return d = uclip<24>(d - i); }
  51. inline unsigned operator *= (unsigned i) { return d = uclip<24>(d * i); }
  52. inline unsigned operator /= (unsigned i) { return d = uclip<24>(d / i); }
  53. inline unsigned operator %= (unsigned i) { return d = uclip<24>(d % i); }
  54. reg24_t() : d(0) {}
  55. };
  56. struct regs_t {
  57. reg24_t pc;
  58. reg16_t a, x, y, s, d;
  59. flag_t p;
  60. uint8_t db, mdr;
  61. bool e;
  62. regs_t() : db(0), mdr(0), e(false) {}
  63. };