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1.1.1.3 root 1: /*
1.1 root 2: * UAE - The Un*x Amiga Emulator
1.1.1.3 root 3: *
1.1 root 4: * MC68000 emulation
5: *
6: * Copyright 1995 Bernd Schmidt
7: */
8:
1.1.1.10 root 9: #include "readcpu.h"
10: #include "machdep/m68k.h"
1.1.1.6 root 11:
12: #ifndef SET_CFLG
13:
14: #define SET_CFLG(x) (CFLG = (x))
15: #define SET_NFLG(x) (NFLG = (x))
16: #define SET_VFLG(x) (VFLG = (x))
17: #define SET_ZFLG(x) (ZFLG = (x))
18: #define SET_XFLG(x) (XFLG = (x))
19:
20: #define GET_CFLG CFLG
21: #define GET_NFLG NFLG
22: #define GET_VFLG VFLG
23: #define GET_ZFLG ZFLG
24: #define GET_XFLG XFLG
25:
26: #define CLEAR_CZNV do { \
27: SET_CFLG (0); \
28: SET_ZFLG (0); \
29: SET_NFLG (0); \
30: SET_VFLG (0); \
1.1.1.7 root 31: } while (0)
1.1.1.6 root 32:
33: #define COPY_CARRY (SET_XFLG (GET_CFLG))
34: #endif
35:
1.1.1.15 root 36: extern const int areg_byteinc[];
37: extern const int imm8_table[];
1.1 root 38:
39: extern int movem_index1[256];
40: extern int movem_index2[256];
41: extern int movem_next[256];
42:
43: extern int fpp_movem_index1[256];
44: extern int fpp_movem_index2[256];
45: extern int fpp_movem_next[256];
46:
47: extern int broken_in;
48:
1.1.1.4 root 49: typedef unsigned long cpuop_func (uae_u32) REGPARAM;
1.1 root 50:
51: struct cputbl {
52: cpuop_func *handler;
53: int specific;
1.1.1.3 root 54: uae_u16 opcode;
1.1 root 55: };
56:
1.1.1.4 root 57: extern unsigned long op_illg (uae_u32) REGPARAM;
1.1 root 58:
1.1.1.2 root 59: typedef char flagtype;
1.1 root 60:
1.1.1.11 root 61: /* You can set this to long double to be more accurate. However, the
62: resulting alignment issues will cost a lot of performance in some
63: apps */
64: #define USE_LONG_DOUBLE 0
65:
66: #if USE_LONG_DOUBLE
67: typedef long double fptype;
68: #else
69: typedef double fptype;
70: #endif
71:
1.1.1.3 root 72: extern struct regstruct
1.1 root 73: {
1.1.1.3 root 74: uae_u32 regs[16];
1.1.1.16! root 75:
! 76: uae_u32 pc;
! 77: uae_u8 *pc_p;
! 78: uae_u8 *pc_oldp;
! 79:
! 80: uae_u16 irc, ir;
! 81: uae_u32 spcflags;
! 82:
1.1.1.14 root 83: uaecptr usp,isp,msp;
1.1.1.3 root 84: uae_u16 sr;
1.1 root 85: flagtype t1;
86: flagtype t0;
87: flagtype s;
88: flagtype m;
89: flagtype x;
90: flagtype stopped;
91: int intmask;
1.1.1.3 root 92:
93: uae_u32 vbr,sfc,dfc;
1.1 root 94:
1.1.1.11 root 95: fptype fp[8];
96: fptype fp_result;
97:
1.1.1.3 root 98: uae_u32 fpcr,fpsr,fpiar;
1.1.1.11 root 99: uae_u32 fpsr_highbyte;
1.1.1.3 root 100:
1.1.1.16! root 101: uae_u32 caar, cacr;
! 102: uae_u32 itt0, itt1, dtt0, dtt1;
! 103: uae_u32 tcr, mmusr, urp, srp, buscr;
! 104:
! 105: uae_u32 mmu_fslw, mmu_fault_addr;
! 106: uae_u16 mmu_ssw;
! 107: uae_u32 wb3_data;
! 108: uae_u16 wb3_status;
! 109:
! 110: uae_u64 srp_030, crp_030;
! 111: uae_u32 tt0_030, tt1_030, tc_030;
! 112: uae_u16 mmusr_030;
! 113:
! 114: uae_u32 pcr;
! 115:
1.1.1.3 root 116: uae_u32 kick_mask;
1.1.1.14 root 117: uae_u32 address_space_mask;
1.1.1.3 root 118:
1.1.1.14 root 119: uae_u8 panic;
120: uae_u32 panic_pc, panic_addr;
1.1 root 121: } regs, lastint_regs;
122:
1.1.1.14 root 123: STATIC_INLINE uae_u32 munge24(uae_u32 x)
124: {
125: return x & regs.address_space_mask;
126: }
127:
1.1.1.10 root 128: STATIC_INLINE void set_special (uae_u32 x)
129: {
130: regs.spcflags |= x;
131: }
132:
133: STATIC_INLINE void unset_special (uae_u32 x)
134: {
135: regs.spcflags &= ~x;
136: }
137:
1.1.1.2 root 138: #define m68k_dreg(r,num) ((r).regs[(num)])
1.1.1.4 root 139: #define m68k_areg(r,num) (((r).regs + 8)[(num)])
1.1 root 140:
1.1.1.12 root 141: STATIC_INLINE void m68k_setpc (uaecptr newpc)
142: {
143: regs.pc_p = regs.pc_oldp = get_real_address (newpc);
144: regs.pc = newpc;
145: }
146:
147: STATIC_INLINE uaecptr m68k_getpc (void)
148: {
149: return regs.pc + ((char *)regs.pc_p - (char *)regs.pc_oldp);
150: }
151:
152: STATIC_INLINE uaecptr m68k_getpc_p (uae_u8 *p)
153: {
154: return regs.pc + ((char *)p - (char *)regs.pc_oldp);
155: }
156:
1.1.1.3 root 157: #define get_ibyte(o) do_get_mem_byte((uae_u8 *)(regs.pc_p + (o) + 1))
158: #define get_iword(o) do_get_mem_word((uae_u16 *)(regs.pc_p + (o)))
159: #define get_ilong(o) do_get_mem_long((uae_u32 *)(regs.pc_p + (o)))
160:
161: #define m68k_incpc(o) (regs.pc_p += (o))
162:
163: /* These are only used by the 68020/68881 code, and therefore don't
164: * need to handle prefetch. */
1.1.1.7 root 165: STATIC_INLINE uae_u32 next_ibyte (void)
1.1 root 166: {
1.1.1.4 root 167: uae_u32 r = get_ibyte (0);
168: m68k_incpc (2);
1.1.1.2 root 169: return r;
170: }
171:
1.1.1.7 root 172: STATIC_INLINE uae_u32 next_iword (void)
1.1.1.2 root 173: {
1.1.1.4 root 174: uae_u32 r = get_iword (0);
175: m68k_incpc (2);
1.1 root 176: return r;
177: }
178:
1.1.1.7 root 179: STATIC_INLINE uae_u32 next_ilong (void)
1.1 root 180: {
1.1.1.4 root 181: uae_u32 r = get_ilong (0);
182: m68k_incpc (4);
1.1 root 183: return r;
184: }
185:
1.1.1.14 root 186: STATIC_INLINE void m68k_do_rts(void)
187: {
1.1.1.16! root 188: m68k_setpc(get_long(m68k_areg (regs, 7)));
! 189: m68k_areg (regs, 7) += 4;
1.1.1.14 root 190: }
191:
192: STATIC_INLINE void m68k_do_bsr(uaecptr oldpc, uae_s32 offset)
193: {
1.1.1.16! root 194: m68k_areg (regs, 7) -= 4;
! 195: put_long(m68k_areg (regs, 7), oldpc);
1.1.1.14 root 196: m68k_incpc(offset);
197: }
198:
199: STATIC_INLINE void m68k_do_jsr(uaecptr oldpc, uaecptr dest)
200: {
1.1.1.16! root 201: m68k_areg (regs, 7) -= 4;
! 202: put_long(m68k_areg (regs, 7), oldpc);
1.1.1.14 root 203: m68k_setpc(dest);
204: }
1.1 root 205:
1.1.1.7 root 206: STATIC_INLINE void m68k_setstopped (int stop)
1.1 root 207: {
208: regs.stopped = stop;
1.1.1.12 root 209: /* A traced STOP instruction drops through immediately without
210: actually stopping. */
211: if (stop && (regs.spcflags & SPCFLAG_DOTRACE) == 0)
1.1 root 212: regs.spcflags |= SPCFLAG_STOP;
213: }
214:
1.1.1.5 root 215: extern uae_u32 get_disp_ea_020 (uae_u32 base, uae_u32 dp);
216: extern uae_u32 get_disp_ea_000 (uae_u32 base, uae_u32 dp);
1.1 root 217:
1.1.1.9 root 218: extern uae_s32 ShowEA (FILE *, int reg, amodes mode, wordsizes size, char *buf);
1.1.1.2 root 219:
1.1.1.4 root 220: extern void MakeSR (void);
221: extern void MakeFromSR (void);
222: extern void Exception (int, uaecptr);
223: extern void dump_counts (void);
1.1.1.8 root 224: extern int m68k_move2c (int, uae_u32 *);
225: extern int m68k_movec2 (int, uae_u32 *);
1.1.1.3 root 226: extern void m68k_divl (uae_u32, uae_u32, uae_u16, uaecptr);
227: extern void m68k_mull (uae_u32, uae_u32, uae_u16);
1.1 root 228: extern void init_m68k (void);
1.1.1.4 root 229: extern void m68k_go (int);
1.1.1.9 root 230: extern void m68k_dumpstate (FILE *, uaecptr *);
231: extern void m68k_disasm (FILE *, uaecptr, uaecptr *, int);
1.1.1.4 root 232: extern void m68k_reset (void);
1.1.1.2 root 233:
1.1.1.3 root 234: extern void mmu_op (uae_u32, uae_u16);
1.1.1.16! root 235: extern void mmu_op30 (uaecptr, uae_u32, int, uaecptr);
1.1.1.2 root 236:
1.1.1.3 root 237: extern void fpp_opp (uae_u32, uae_u16);
238: extern void fdbcc_opp (uae_u32, uae_u16);
239: extern void fscc_opp (uae_u32, uae_u16);
240: extern void ftrapcc_opp (uae_u32,uaecptr);
241: extern void fbcc_opp (uae_u32, uaecptr, uae_u32);
242: extern void fsave_opp (uae_u32);
243: extern void frestore_opp (uae_u32);
244:
1.1.1.14 root 245: extern void exception3 (uae_u32 opcode, uaecptr addr, uaecptr fault);
246: extern void exception3i (uae_u32 opcode, uaecptr addr, uaecptr fault);
247: extern void exception2 (uaecptr addr, uaecptr fault);
248: extern void cpureset (void);
249:
250: extern void fill_prefetch_slow (void);
1.1 root 251:
1.1.1.2 root 252: #define CPU_OP_NAME(a) op ## a
253:
1.1.1.16! root 254: /* 68060 */
! 255: extern const struct cputbl op_smalltbl_0_ff[];
1.1.1.10 root 256: /* 68040 */
1.1.1.16! root 257: extern const struct cputbl op_smalltbl_1_ff[];
! 258: /* 68030 */
! 259: extern const struct cputbl op_smalltbl_2_ff[];
1.1.1.3 root 260: /* 68020 */
1.1.1.16! root 261: extern const struct cputbl op_smalltbl_3_ff[];
1.1.1.3 root 262: /* 68010 */
1.1.1.16! root 263: extern const struct cputbl op_smalltbl_4_ff[];
! 264: /* 68000 - unused */
! 265: #if 0
! 266: extern const struct cputbl op_smalltbl_5_ff[];
! 267: #endif
1.1.1.3 root 268: /* 68000 slow but compatible. */
1.1.1.16! root 269: extern const struct cputbl op_smalltbl_6_ff[];
1.1.1.3 root 270:
271: extern cpuop_func *cpufunctbl[65536] ASM_SYM_FOR_FUNC ("cpufunctbl");
1.1.1.2 root 272:
1.1.1.11 root 273: #ifdef JIT
274: #else
275: #define flush_icache(X) do {} while (0)
276: #endif
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