diff options
Diffstat (limited to 'sim/w65/interp.h')
| -rw-r--r-- | sim/w65/interp.h | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/sim/w65/interp.h b/sim/w65/interp.h new file mode 100644 index 00000000000..2fd5d228b7b --- /dev/null +++ b/sim/w65/interp.h @@ -0,0 +1,194 @@ +#define fetch8(x) fetch8func((cycles++,(x))) +#define NFAKES 16 +typedef struct + { + unsigned a; + unsigned x; + unsigned y; + unsigned pc; /* Keep pbr in there too */ + unsigned dbr; + unsigned d; + unsigned s; + unsigned p; + unsigned e; + unsigned char *memory; + unsigned int exception; + unsigned int ticks; + unsigned int cycles; + unsigned int insts; + unsigned int r[NFAKES]; + } +saved_state_type; + + + +#define GET_P \ + ((GET_NBIT << 7) \ + | (GET_VBIT << 6) \ + | (GET_MBIT << 5) \ + | (GET_XBIT << 4) \ + | (GET_DBIT << 3) \ + | (GET_IBIT << 2) \ + | (GET_ZBIT << 1) \ + | (GET_CBIT << 0)) + +#define SET_P(_bits) \ +{ int bits = _bits; \ +SET_NBIT((bits>>7)&1); \ +SET_VBIT((bits>>6)&1); \ +SET_MBIT((bits>>5)&1); \ +SET_XBIT((bits>>4)&1); \ +SET_DBIT((bits>>3)&1); \ +SET_IBIT((bits>>2)&1); \ +SET_ZBIT((bits>>1)&1); \ +SET_CBIT((bits>>0)&1); } + +#define BFLAG (1<<4) +#define DFLAG (1<<3) + +#define GET_A (the_a) +#define GET_E (the_e) +#define GET_B (the_b) +#define GET_CBIT (the_cbit) +#define GET_D (the_d) +#define GET_DBIT (the_dbit) +#define GET_DBR_HIGH (the_dbr) +#define GET_DBR_LOW (the_dbr >> 16) +#define GET_DPR (the_dpr) +#define GET_IBIT (the_ibit) +#define GET_MBIT (the_mbit) +#define SET_XBIT(x) { the_xbit = x; } +#define GET_NBIT (the_nbit) +#define GET_PBRPC (the_pc) +#define GET_PBR_HIGH (the_pc & 0xff0000) +#define GET_PBR_LOW (the_pc >> 16) +#define GET_PC (the_pc & 0xffff) +#define GET_S (the_s) +#define GET_VBIT (the_vbit) +#define GET_X (the_x) +#define GET_XBIT (the_xbit) +#define GET_Y (the_y) +#define GET_ZBIT (the_zbit) +#define IFLAG (1<<2) +#define INC_PC(x) {the_pc += x;} +#define POP16(x) { int _xx; POP8(x); POP8(_xx); x+= _xx<<8;} +#define POP24(x) { int _xx; POP8(x); POP8(_xx); x += _xx << 8; POP8(_xx); x += _xx << 16; } +#define POP8(x) { SET_S(GET_S +1); x = fetch8(GET_S);} +#define PUSH16(x) { int _xx = x;PUSH8(_xx >> 8); PUSH8(_xx);} +#define PUSH8(x) { store8(GET_S, x); SET_S(GET_S-1);} +#define SET_A(x) { the_a = x & AMASK; } +#define SET_B(x) { the_b = x;} +#define SET_CBIT(x) { the_cbit = x;} +#define SET_CBIT_M(x) { the_cbit = (x & (GET_MBIT ? 0x100: 0x10000)) != 0;} +#define SET_CBIT_X(x) { the_cbit = (x & (GET_XBIT ? 0x100: 0x10000)) != 0;} +#define SET_D(x) {the_d = x;} +#define SET_DBIT(x) { the_dbit= x;} +#define SET_DBR_LOW(x) {the_dbr = (x<<16);} +#define SET_DPR(x) { the_dpr = x;} +#define SET_E(x) { the_e = x;} +#define SET_IBIT(x) { the_ibit = x;} +#define SET_MBIT(x) { the_mbit = x; } +#define SET_NBIT(x) { the_nbit = x;} +#define SET_NBIT_16(x) { the_nbit= ( ((x) & (0x8000)) != 0);} +#define SET_NBIT_8(x) { the_nbit= ( ((x) & (0x80)) != 0);} +#define SET_NBIT_M(x) { if (GET_MBIT) { SET_NBIT_8(x); } else { SET_NBIT_16(x);}} +#define SET_NBIT_X(x) { if (GET_XBIT) { SET_NBIT_8(x); } else { SET_NBIT_16(x);}} +#define SET_PBR(x) { the_pc = (the_pc & 0xffff) + ((x)<<16);} +#define SET_PBRPC(x) { the_pc = x;} +#define SET_ONLY_PC(x) { the_pc = (the_pc & 0xff0000) + ((x ) & 0xffff);} +#define SET_S(x) {the_s = x; } +#define SET_VBIT_16(x) {the_vbit = ((((int)x) < -0x8000) || (((int)x) > 0x7fff));} +#define SET_VBIT_8(x) {the_vbit = ((((int)x) < -0x80) || (((int)x) > 0x7f));} +/*#define SET_VBIT_M(x) { if(GET_MBIT) {SET_VBIT_8(x);}else {SET_VBIT_16(x);}}*/ +#define SET_ZBIT_16(x) { the_zbit = ((x & 0xffff) == 0);} +#define SET_ZBIT_8(x) { the_zbit = ((x & 0xff) == 0);} +#define SET_ZBIT_M(x) { if(GET_MBIT) {SET_ZBIT_8(x);}else {SET_ZBIT_16(x);}} +#define SET_ZBIT_X(x) { if(GET_XBIT) {SET_ZBIT_8(x);}else {SET_ZBIT_16(x);}} +#define SET_VBIT(x) { the_vbit = x; } +#define SET_ZBIT(x) { the_zbit = x; } +#define SET_X(x) { the_x = (x) & (GET_XBIT ? 0xff : 0xffff);} +#define SET_Y(x) { the_y = (x) & (GET_XBIT ? 0xff : 0xffff);} + +#define AMASK ( GET_MBIT ? 0xff : 0xffff) +#define SMASK ( GET_MBIT ? 0x80 : 0x8000) +#define SET_VBIT_M(s1,acc,d) ( the_vbit = ((s1 ^ acc) & (acc ^ d) & SMASK )!=0) + +/*#define fetch8(x) (memory[x&MMASK])*/ +#define fetch16(x) (fetch8(x) + (fetch8((x)+1)<<8)) +#define fetch24(x) (fetch8(x) + (fetch8((x)+1)<<8) + (fetch8((x)+2)<<16)) +#define fetch8sext(x) ((char)fetch8(x)) +#define fetch16sext(x) ((short)fetch16(x)) +#define store8(x,y) {memory[x&MMASK]=y;} +#define store16(x,y) { store8(x,y); store8(x+1,y>>8);} +#define SEXTM(x) (GET_MBIT ? ((char)x): ((short)x)) + + +#define STARTFUNC() \ + register unsigned char *memory;\ + int the_s; \ + int the_b; \ + int the_x; \ + int the_d; \ + int the_y; \ + int the_dbr; \ + int the_pc; \ + int the_nbit; \ + int the_vbit; \ + int the_z; \ + int the_mbit; \ + int the_ibit; \ + int the_xbit; \ + int the_zbit; \ + int the_cbit; \ + int the_dbit; \ + int the_dpr; \ + int the_e; \ + int the_a; \ + int tick_start = get_now ();\ + int cycles = 0; \ + int insts = 0; \ + \ + SET_E (saved_state.e); \ + SET_P (saved_state.p); \ + SET_A (saved_state.a); \ + SET_X (saved_state.x); \ + SET_Y (saved_state.y); \ + SET_ONLY_PC (saved_state.pc); \ + SET_PBR (saved_state.pc >> 16); \ + SET_DBR_LOW (saved_state.dbr); \ + SET_D (saved_state.d); \ + SET_S (saved_state.s); \ + memory = saved_state.memory ; \ +{ int k; for (k = 0; k < NFAKES; k++) \ + store16(0x10 + k * 2, saved_state.r[k]); }\ + \ + top: \ + + + +#define ENDFUNC() \ + rethink: \ + saved_state.ticks += get_now () - tick_start;\ + saved_state.cycles += cycles; \ + saved_state.insts += insts; \ +{ int k; for (k = 0; k < NFAKES; k++) \ +saved_state.r[k] = fetch16(0x10 + k * 2); }\ + \ + saved_state.e = GET_E; \ + saved_state.p = GET_P; \ + saved_state.a = GET_A; \ + saved_state.x = GET_X; \ + saved_state.y = GET_Y; \ + saved_state.pc = GET_PBRPC; \ + saved_state.dbr = GET_DBR_LOW; \ + saved_state.d = GET_D; \ + saved_state.s = GET_S; \ + \ + return 0; \ + + +extern saved_state_type saved_state; + +#define MMASK 0xfffff +#define NUMSEGS 16 +#define RETHINK goto rethink; |