o cleanup

tools/bsnes/cpu/cpuregs.hpp

@@ -0,0 +1,74 @@
+struct flag_t {
+  bool n, v, m, x, d, i, z, c;
+
+  inline operator unsigned() const {
+    return (n << 7) + (v << 6) + (m << 5) + (x << 4)
+         + (d << 3) + (i << 2) + (z << 1) + (c << 0);
+  }
+
+  inline unsigned operator=(uint8_t data) {
+    n = data & 0x80; v = data & 0x40; m = data & 0x20; x = data & 0x10;
+    d = data & 0x08; i = data & 0x04; z = data & 0x02; c = data & 0x01;
+    return data;
+  }
+
+  inline unsigned operator|=(unsigned data) { return operator=(operator unsigned() | data); }
+  inline unsigned operator^=(unsigned data) { return operator=(operator unsigned() ^ data); }
+  inline unsigned operator&=(unsigned data) { return operator=(operator unsigned() & data); }
+
+  flag_t() : n(0), v(0), m(0), x(0), d(0), i(0), z(0), c(0) {}
+};
+
+struct reg16_t {
+  union {
+    uint16 w;
+    struct { uint8 order_lsb2(l, h); };
+  };
+
+  inline operator unsigned() const { return w; }
+  inline unsigned operator   = (unsigned i) { return w   = i; }
+  inline unsigned operator  |= (unsigned i) { return w  |= i; }
+  inline unsigned operator  ^= (unsigned i) { return w  ^= i; }
+  inline unsigned operator  &= (unsigned i) { return w  &= i; }
+  inline unsigned operator <<= (unsigned i) { return w <<= i; }
+  inline unsigned operator >>= (unsigned i) { return w >>= i; }
+  inline unsigned operator  += (unsigned i) { return w  += i; }
+  inline unsigned operator  -= (unsigned i) { return w  -= i; }
+  inline unsigned operator  *= (unsigned i) { return w  *= i; }
+  inline unsigned operator  /= (unsigned i) { return w  /= i; }
+  inline unsigned operator  %= (unsigned i) { return w  %= i; }
+
+  reg16_t() : w(0) {}
+};
+
+struct reg24_t {
+  union {
+    uint32 d;
+    struct { uint16 order_lsb2(w, wh); };
+    struct { uint8  order_lsb4(l, h, b, bh); };
+  };
+
+  inline operator unsigned() const { return d; }
+  inline unsigned operator   = (unsigned i) { return d = uclip<24>(i); }
+  inline unsigned operator  |= (unsigned i) { return d = uclip<24>(d  | i); }
+  inline unsigned operator  ^= (unsigned i) { return d = uclip<24>(d  ^ i); }
+  inline unsigned operator  &= (unsigned i) { return d = uclip<24>(d  & i); }
+  inline unsigned operator <<= (unsigned i) { return d = uclip<24>(d << i); }
+  inline unsigned operator >>= (unsigned i) { return d = uclip<24>(d >> i); }
+  inline unsigned operator  += (unsigned i) { return d = uclip<24>(d  + i); }
+  inline unsigned operator  -= (unsigned i) { return d = uclip<24>(d  - i); }
+  inline unsigned operator  *= (unsigned i) { return d = uclip<24>(d  * i); }
+  inline unsigned operator  /= (unsigned i) { return d = uclip<24>(d  / i); }
+  inline unsigned operator  %= (unsigned i) { return d = uclip<24>(d  % i); }
+
+  reg24_t() : d(0) {}
+};
+
+struct regs_t {
+  reg24_t  pc;
+  reg16_t  a, x, y, s, d;
+  flag_t   p;
+  uint8_t  db, mdr;
+  bool     e;
+  regs_t() : db(0), mdr(0), e(false) {}
+};