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Timing.

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This commit is contained in:
Andrea Orrù 2013-11-09 12:00:04 +01:00
parent a7c724a509
commit 4feddc9988
1 changed files with 20 additions and 20 deletions
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40
src/cpu.cpp
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@ -34,20 +34,20 @@ inline u16 imm() { return PC++; }
inline u16 imm16() { PC += 2; return PC - 2; }
inline u16 abs() { return rd16(imm16()); }
inline u16 _abx() { T; return abs() + X; } // Exception.
inline u16 abx() { u16 a = abs(); if (cross(a, X)) { T; }; return a + X; }
inline u16 aby() { u16 a = abs(); if (cross(a, Y)) { T; }; return a + Y; }
inline u16 abx() { if (cross(a, X)) { T; }; u16 a = abs(); return a + X; }
inline u16 aby() { if (cross(a, Y)) { T; }; u16 a = abs(); return a + Y; }
inline u16 zp() { return rd(imm()); }
inline u16 zpx() { T; return (zp() + X) % 0x100; }
inline u16 zpy() { T; return (zp() + Y) % 0x100; }
inline u16 izx() { u8 i = zpx(); return rd16_d(i, (i+1) % 0x100); }
inline u16 _izy() { u8 i = zp(); return rd16_d(i, (i+1) % 0x100) + Y; } // Exception.
inline u16 izy() { u16 a = _izy(); if (cross(a-Y, Y)) { T; }; return a; }
inline u16 izy() { if (cross(a-Y, Y)) { T; }; u16 a = _izy(); return a; }
/* STx */
template<u8& r, Mode m> void st() { wr( m() , r); }
template<> void st<A,izy>() { wr(_izy() , A); T; } // Exceptions.
template<> void st<A,abx>() { wr( abs() + X, A); T; } // ...
template<> void st<A,aby>() { wr( abs() + Y, A); T; } // ...
template<u8& r, Mode m> void st() { wr( m() , r); }
template<> void st<A,izy>() { T; wr(_izy() , A); } // Exceptions.
template<> void st<A,abx>() { T; wr( abs() + X, A); } // ...
template<> void st<A,aby>() { T; wr( abs() + Y, A); } // ...
#define G u16 a = m(); u8 p = rd(a) /* Fetch parameter */
template<u8& r, Mode m> void ld() { G; upd_nz(r = p); } // LDx
@ -60,12 +60,12 @@ template<Mode m> void AND() { G; upd_nz(A &= p); }
template<Mode m> void EOR() { G; upd_nz(A ^= p); }
template<Mode m> void ORA() { G; upd_nz(A |= p); }
/* Read-Modify-Write */
template<Mode m> void ASL() { G; P.c = p & 0x80; upd_nz(wr(a, p << 1)); T; }
template<Mode m> void LSR() { G; P.c = p & 0x01; upd_nz(wr(a, p >> 1)); T; }
template<Mode m> void ROL() { G; u8 c = P.c ; P.c = p & 0x80; upd_nz(wr(a, (p << 1) | c) ); T; }
template<Mode m> void ROR() { G; u8 c = P.c << 7; P.c = p & 0x01; upd_nz(wr(a, c | (p >> 1)) ); T; }
template<Mode m> void DEC() { G; upd_nz(wr(a, --p)); T; }
template<Mode m> void INC() { G; upd_nz(wr(a, ++p)); T; }
template<Mode m> void ASL() { G; P.c = p & 0x80; T; upd_nz(wr(a, p << 1)); }
template<Mode m> void LSR() { G; P.c = p & 0x01; T; upd_nz(wr(a, p >> 1)); }
template<Mode m> void ROL() { G; u8 c = P.c ; P.c = p & 0x80; T; upd_nz(wr(a, (p << 1) | c) ); }
template<Mode m> void ROR() { G; u8 c = P.c << 7; P.c = p & 0x01; T; upd_nz(wr(a, c | (p >> 1)) ); }
template<Mode m> void DEC() { G; T; upd_nz(wr(a, --p)); }
template<Mode m> void INC() { G; T; upd_nz(wr(a, ++p)); }
#undef G
/* DEx, INx */
@ -82,20 +82,20 @@ template<u8& s, u8& d> void tr() { upd_nz(d = s); T; }
template<> void tr<X,S>() { S = X; T; } // TSX, exception.
/* Stack operations */
void PLP() { P.reg = (pop() & 0b11001111) | (P.reg & 0b00110000); T; T; }
void PHP() { push(P.reg | (1 << 4)); T; }
void PLA() { A = pop(); upd_nz(A); T; T; }
void PHA() { push(A); T; }
void PLP() { T; T; P.reg = (pop() & 0b11001111) | (P.reg & 0b00110000); }
void PHP() { T; push(P.reg | (1 << 4)); }
void PLA() { T; T; A = pop(); upd_nz(A); }
void PHA() { T; push(A); }
/* Flow control (branches, jumps) */
template<u8 f, bool v> void br() { s8 j = rd(imm()); if (P.get(f) == v) { PC += j; T; } }
template<u8 f, bool v> void br() { s8 j = rd(imm()); if (P.get(f) == v) { T; PC += j; } }
void JMP_IND() { u16 i = rd16(imm16()); PC = rd16_d(i, (i&0xFF00) | ((i+1) % 0x100)); }
void JMP() { PC = rd16(imm16()); }
void JSR() { u16 t = PC+1; T; push(t >> 8); push(t); PC = rd16(imm16()); }
/* Return instructions */
void RTS() { PC = (pop() | (pop() << 8)) + 1; T; T; T; }
void RTI() { PLP(); PC = pop() | (pop() << 8); }
void RTS() { T; T; PC = (pop() | (pop() << 8)) + 1; T; }
void RTI() { PLP(); PC = pop() | (pop() << 8); }
template<u8 f, bool v> void flag() { P.set(f, v); T; } // Clear and set flags.
void NOP() { T; }