--- uae/src/newcpu.c 2018/04/24 16:39:07 1.1.1.2 +++ uae/src/newcpu.c 2018/04/24 17:12:30 1.1.1.21 @@ -1,6 +1,6 @@ - /* + /* * UAE - The Un*x Amiga Emulator - * + * * MC68000 emulation * * (c) 1995 Bernd Schmidt @@ -11,18 +11,28 @@ #include "config.h" #include "options.h" -#include "machdep/m68k.h" #include "events.h" -#include "gui.h" +#include "uae.h" #include "memory.h" #include "custom.h" -#include "readcpu.h" #include "newcpu.h" #include "autoconf.h" #include "ersatz.h" -#include "blitter.h" #include "debug.h" -#include "compiler.h" +#include "gui.h" +#include "savestate.h" +#include "blitter.h" + +/* Opcode of faulting instruction */ +static uae_u16 last_op_for_exception_3; +/* PC at fault time */ +static uaecptr last_addr_for_exception_3; +/* Address that generated the exception */ +static uaecptr last_fault_for_exception_3; +/* read (0) or write (1) access */ +static int last_writeaccess_for_exception_3; +/* instruction (1) or data (0) access */ +static int last_instructionaccess_for_exception_3; int areg_byteinc[] = { 1,1,1,1,1,1,1,2 }; int imm8_table[] = { 8,1,2,3,4,5,6,7 }; @@ -36,60 +46,162 @@ int fpp_movem_index2[256]; int fpp_movem_next[256]; cpuop_func *cpufunctbl[65536]; -#if USER_PROGRAMS_BEHAVE > 0 -cpuop_func *cpufunctbl_behaved[65536]; -#endif -#define COUNT_INSTRS 0 +#define COUNT_INSTRS 0 #if COUNT_INSTRS static unsigned long int instrcount[65536]; -static UWORD opcodenums[65536]; +static uae_u16 opcodenums[65536]; -static int compfn(const void *el1, const void *el2) +static int compfn (const void *el1, const void *el2) { - return instrcount[*(const UWORD *)el1] < instrcount[*(const UWORD *)el2]; + return instrcount[*(const uae_u16 *)el1] < instrcount[*(const uae_u16 *)el2]; } -void dump_counts(void) +static char *icountfilename (void) { - FILE *f = fopen(getenv("INSNCOUNT") ? getenv("INSNCOUNT") : "insncount", "w"); - unsigned long int total = 0; + char *name = getenv ("INSNCOUNT"); + if (name) + return name; + return COUNT_INSTRS == 2 ? "frequent.68k" : "insncount"; +} + +void dump_counts (void) +{ + FILE *f = fopen (icountfilename (), "w"); + unsigned long int total; int i; - - for(i=0; i < 65536; i++) { + + write_log ("Writing instruction count file...\n"); + for (i = 0; i < 65536; i++) { opcodenums[i] = i; - total += instrcount[i]; + total += instrcount[i]; } - qsort(opcodenums, 65536, sizeof(UWORD), compfn); - - fprintf(f, "Total: %lu\n", total); - for(i=0; i < 65536; i++) { + qsort (opcodenums, 65536, sizeof(uae_u16), compfn); + + fprintf (f, "Total: %lu\n", total); + for (i=0; i < 65536; i++) { unsigned long int cnt = instrcount[opcodenums[i]]; struct instr *dp; struct mnemolookup *lookup; if (!cnt) break; dp = table68k + opcodenums[i]; - for (lookup = lookuptab;lookup->mnemo != dp->mnemo; lookup++) ; - fprintf(f, "%04x: %lu %s\n", opcodenums[i], cnt, lookup->name); + for (lookup = lookuptab;lookup->mnemo != dp->mnemo; lookup++) + ; + fprintf (f, "%04x: %lu %s\n", opcodenums[i], cnt, lookup->name); } - fclose(f); + fclose (f); } #else -void dump_counts(void) +void dump_counts (void) { } #endif int broken_in; +static unsigned long op_illg_1 (uae_u32 opcode) REGPARAM; + +static unsigned long REGPARAM2 op_illg_1 (uae_u32 opcode) +{ + op_illg (opcode); + return 4; +} + +static void build_cpufunctbl (void) +{ + int i; + unsigned long opcode; + struct cputbl *tbl = (currprefs.cpu_level == 4 ? op_smalltbl_0_ff + : currprefs.cpu_level == 3 ? op_smalltbl_1_ff + : currprefs.cpu_level == 2 ? op_smalltbl_2_ff + : currprefs.cpu_level == 1 ? op_smalltbl_3_ff + : ! currprefs.cpu_compatible ? op_smalltbl_4_ff + : op_smalltbl_5_ff); + + write_log ("Building CPU function table (%d %d %d).\n", + currprefs.cpu_level, currprefs.cpu_compatible, currprefs.address_space_24); + + for (opcode = 0; opcode < 65536; opcode++) + cpufunctbl[opcode] = op_illg_1; + for (i = 0; tbl[i].handler != NULL; i++) { + if (! tbl[i].specific) + cpufunctbl[tbl[i].opcode] = tbl[i].handler; + } + for (opcode = 0; opcode < 65536; opcode++) { + cpuop_func *f; + + if (table68k[opcode].mnemo == i_ILLG || table68k[opcode].clev > currprefs.cpu_level) + continue; + + if (table68k[opcode].handler != -1) { + f = cpufunctbl[table68k[opcode].handler]; + if (f == op_illg_1) + abort(); + cpufunctbl[opcode] = f; + } + } + for (i = 0; tbl[i].handler != NULL; i++) { + if (tbl[i].specific) + cpufunctbl[tbl[i].opcode] = tbl[i].handler; + } +} + +void fill_prefetch_slow (void) +{ +#ifdef CPUEMU_6 + if (currprefs.cpu_cycle_exact) { + regs.ir = get_word_ce (m68k_getpc ()); + regs.irc = get_word_ce (m68k_getpc () + 2); + } else { +#endif + regs.ir = get_word (m68k_getpc ()); + regs.irc = get_word (m68k_getpc () + 2); +#ifdef CPUEMU_6 + } +#endif +} + +unsigned long cycles_mask, cycles_val; + +static void update_68k_cycles (void) +{ + cycles_mask = 0; + cycles_val = currprefs.m68k_speed; + if (currprefs.m68k_speed < 1) { + cycles_mask = 0xFFFFFFFF; + cycles_val = 0; + } +} + +void check_prefs_changed_cpu (void) +{ + if (currprefs.cpu_level != changed_prefs.cpu_level + || currprefs.cpu_compatible != changed_prefs.cpu_compatible) + { + if (!currprefs.cpu_compatible && changed_prefs.cpu_compatible) + fill_prefetch_slow (); + + currprefs.cpu_level = changed_prefs.cpu_level; + currprefs.cpu_compatible = changed_prefs.cpu_compatible; + build_cpufunctbl (); + } + if (currprefs.m68k_speed != changed_prefs.m68k_speed) { + currprefs.m68k_speed = changed_prefs.m68k_speed; + reset_frame_rate_hack (); + update_68k_cycles (); + } +} + void init_m68k (void) { - long int opcode; - int i,j; - + int i; + + update_68k_cycles (); + for (i = 0 ; i < 256 ; i++) { + int j; for (j = 0 ; j < 8 ; j++) { if (i & (1 << j)) break; } @@ -98,253 +210,431 @@ void init_m68k (void) movem_next[i] = i & (~(1 << j)); } for (i = 0 ; i < 256 ; i++) { + int j; for (j = 7 ; j >= 0 ; j--) { if (i & (1 << j)) break; } - fpp_movem_index1[i] = j; - fpp_movem_index2[i] = 7-j; + fpp_movem_index1[i] = 7-j; + fpp_movem_index2[i] = j; fpp_movem_next[i] = i & (~(1 << j)); } #if COUNT_INSTRS { - FILE *f = fopen("insncount", "r"); - memset(instrcount, 0, sizeof instrcount); + FILE *f = fopen (icountfilename (), "r"); + memset (instrcount, 0, sizeof instrcount); if (f) { - ULONG opcode, count, total; + uae_u32 opcode, count, total; char name[20]; - fscanf(f,"Total: %lu\n",&total); - while(fscanf(f,"%lx: %lu %s\n",&opcode,&count,name)==3) { + write_log ("Reading instruction count file...\n"); + fscanf (f, "Total: %lu\n", &total); + while (fscanf (f, "%lx: %lu %s\n", &opcode, &count, name) == 3) { instrcount[opcode] = count; } fclose(f); } } #endif - printf("Building CPU table...\n"); - read_table68k (); - do_merges (); - for (opcode = 0; opcode < 65536; opcode++) - cpufunctbl[opcode] = op_illg; - for (i = 0; op_smalltbl[i].handler != NULL; i++) { - if (!op_smalltbl[i].specific) - cpufunctbl[op_smalltbl[i].opcode] = op_smalltbl[i].handler; + write_log ("Building CPU table for configuration: 68"); + regs.address_space_mask = 0xffffffff; + if (currprefs.address_space_24 && currprefs.cpu_level > 1) + write_log ("EC"); + switch (currprefs.cpu_level) { + case 1: + write_log ("010"); + break; + case 2: + write_log ("020"); + break; + case 3: + write_log ("020/881"); + break; + case 4: + /* Who is going to miss the MMU anyway...? :-) */ + write_log ("040"); + break; + default: + write_log ("000"); + break; } - for (opcode = 0; opcode < 65536; opcode++) { - cpuop_func *f; - - if (table68k[opcode].mnemo == i_ILLG) - continue; - - if (table68k[opcode].handler != -1) { - f = cpufunctbl[table68k[opcode].handler]; - if (f == op_illg) - abort(); - cpufunctbl[opcode] = f; - } - } - for (i = 0; op_smalltbl[i].handler != NULL; i++) { - if (op_smalltbl[i].specific) - cpufunctbl[op_smalltbl[i].opcode] = op_smalltbl[i].handler; + if (currprefs.cpu_compatible) + write_log (" (compatible mode)"); + if (currprefs.address_space_24) { + regs.address_space_mask = 0x00ffffff; + write_log (" 24-bit addressing"); } -#if USER_PROGRAMS_BEHAVE > 0 - for (opcode = 0; opcode < 65536; opcode++) - cpufunctbl_behaved[opcode] = op_illg; + write_log ("\n"); + + read_table68k (); + do_merges (); - for (i = 0; op_direct_smalltbl[i].handler != NULL; i++) { - if (!op_direct_smalltbl[i].specific) - cpufunctbl_behaved[op_direct_smalltbl[i].opcode] = op_direct_smalltbl[i].handler; - } - for (opcode = 0; opcode < 65536; opcode++) { - cpuop_func *f; - - if (table68k[opcode].mnemo == i_ILLG) - continue; - - if (table68k[opcode].handler != -1) { - f = cpufunctbl_behaved[table68k[opcode].handler]; - if (f == op_illg) - abort(); - cpufunctbl_behaved[opcode] = f; - } - } - for (i = 0; op_direct_smalltbl[i].handler != NULL; i++) { - if (op_direct_smalltbl[i].specific) - cpufunctbl_behaved[op_direct_smalltbl[i].opcode] = op_direct_smalltbl[i].handler; - } -#endif + write_log ("%d CPU functions\n", nr_cpuop_funcs); + + build_cpufunctbl (); } struct regstruct regs, lastint_regs; static struct regstruct regs_backup[16]; static int backup_pointer = 0; +static long int m68kpc_offset; int lastint_no; -LONG ShowEA(int reg, amodes mode, wordsizes size, char *buf) -{ - UWORD dp; - BYTE disp8; - WORD disp16; +#define get_ibyte_1(o) get_byte(regs.pc + (regs.pc_p - regs.pc_oldp) + (o) + 1) +#define get_iword_1(o) get_word(regs.pc + (regs.pc_p - regs.pc_oldp) + (o)) +#define get_ilong_1(o) get_long(regs.pc + (regs.pc_p - regs.pc_oldp) + (o)) + +uae_s32 ShowEA (FILE *f, int reg, amodes mode, wordsizes size, char *buf) +{ + uae_u16 dp; + uae_s8 disp8; + uae_s16 disp16; int r; - ULONG dispreg; - CPTR addr; - LONG offset = 0; + uae_u32 dispreg; + uaecptr addr; + uae_s32 offset = 0; char buffer[80]; - - switch(mode){ + + switch (mode){ case Dreg: - sprintf(buffer,"D%d", reg); + sprintf (buffer,"D%d", reg); break; case Areg: - sprintf(buffer,"A%d", reg); + sprintf (buffer,"A%d", reg); break; case Aind: - sprintf(buffer,"(A%d)", reg); + sprintf (buffer,"(A%d)", reg); break; case Aipi: - sprintf(buffer,"(A%d)+", reg); + sprintf (buffer,"(A%d)+", reg); break; case Apdi: - sprintf(buffer,"-(A%d)", reg); + sprintf (buffer,"-(A%d)", reg); break; case Ad16: - disp16 = nextiword(); - addr = m68k_areg(regs,reg) + (WORD)disp16; - sprintf(buffer,"(A%d,$%04x) == $%08lx", reg, disp16 & 0xffff, - (long unsigned int)addr); + disp16 = get_iword_1 (m68kpc_offset); m68kpc_offset += 2; + addr = m68k_areg(regs,reg) + (uae_s16)disp16; + sprintf (buffer,"(A%d,$%04x) == $%08lx", reg, disp16 & 0xffff, + (unsigned long)addr); break; case Ad8r: - dp = nextiword(); + dp = get_iword_1 (m68kpc_offset); m68kpc_offset += 2; disp8 = dp & 0xFF; r = (dp & 0x7000) >> 12; - dispreg = dp & 0x8000 ? m68k_areg(regs,r) : m68k_dreg(regs,r); - if (!(dp & 0x800)) dispreg = (LONG)(WORD)(dispreg); + dispreg = dp & 0x8000 ? m68k_areg(regs,r) : m68k_dreg(regs,r); + if (!(dp & 0x800)) dispreg = (uae_s32)(uae_s16)(dispreg); dispreg <<= (dp >> 9) & 3; - + if (dp & 0x100) { - LONG outer = 0, disp = 0; - LONG base = m68k_areg(regs,reg); - char name[10]; - sprintf(name,"A%d, ",reg); - if (dp & 0x80) { base = 0; name[0] = 0; } - if (dp & 0x40) dispreg = 0; - if ((dp & 0x30) == 0x20) disp = (LONG)(WORD)nextiword(); - if ((dp & 0x30) == 0x30) disp = nextilong(); - base += disp; - - if ((dp & 0x3) == 0x2) outer = (LONG)(WORD)nextiword(); - if ((dp & 0x3) == 0x3) outer = nextilong(); - - if (!(dp & 4)) base += dispreg; - if (dp & 3) base = get_long (base); - if (dp & 4) base += dispreg; - - addr = base + outer; - sprintf(buffer,"(%s%c%d.%c*%d+%ld)+%ld == $%08lx", name, - dp & 0x8000 ? 'A' : 'D', (int)r, dp & 0x800 ? 'L' : 'W', - 1 << ((dp >> 9) & 3), - disp,outer, - (long unsigned int)addr); - } - else { - addr = m68k_areg(regs,reg) + (LONG)((BYTE)disp8) + dispreg; - sprintf(buffer,"(A%d, %c%d.%c*%d, $%02x) == $%08lx", reg, + uae_s32 outer = 0, disp = 0; + uae_s32 base = m68k_areg(regs,reg); + char name[10]; + sprintf (name,"A%d, ",reg); + if (dp & 0x80) { base = 0; name[0] = 0; } + if (dp & 0x40) dispreg = 0; + if ((dp & 0x30) == 0x20) { disp = (uae_s32)(uae_s16)get_iword_1 (m68kpc_offset); m68kpc_offset += 2; } + if ((dp & 0x30) == 0x30) { disp = get_ilong_1 (m68kpc_offset); m68kpc_offset += 4; } + base += disp; + + if ((dp & 0x3) == 0x2) { outer = (uae_s32)(uae_s16)get_iword_1 (m68kpc_offset); m68kpc_offset += 2; } + if ((dp & 0x3) == 0x3) { outer = get_ilong_1 (m68kpc_offset); m68kpc_offset += 4; } + + if (!(dp & 4)) base += dispreg; + if (dp & 3) base = get_long (base); + if (dp & 4) base += dispreg; + + addr = base + outer; + sprintf (buffer,"(%s%c%d.%c*%d+%ld)+%ld == $%08lx", name, + dp & 0x8000 ? 'A' : 'D', (int)r, dp & 0x800 ? 'L' : 'W', + 1 << ((dp >> 9) & 3), + disp,outer, + (unsigned long)addr); + } else { + addr = m68k_areg(regs,reg) + (uae_s32)((uae_s8)disp8) + dispreg; + sprintf (buffer,"(A%d, %c%d.%c*%d, $%02x) == $%08lx", reg, dp & 0x8000 ? 'A' : 'D', (int)r, dp & 0x800 ? 'L' : 'W', 1 << ((dp >> 9) & 3), disp8, - (long unsigned int)addr); + (unsigned long)addr); } break; case PC16: - addr = m68k_getpc(); - disp16 = nextiword(); - addr += (WORD)disp16; - sprintf(buffer,"(PC,$%04x) == $%08lx", disp16 & 0xffff,(long unsigned int)addr); + addr = m68k_getpc () + m68kpc_offset; + disp16 = get_iword_1 (m68kpc_offset); m68kpc_offset += 2; + addr += (uae_s16)disp16; + sprintf (buffer,"(PC,$%04x) == $%08lx", disp16 & 0xffff,(unsigned long)addr); break; case PC8r: - addr = m68k_getpc(); - dp = nextiword(); + addr = m68k_getpc () + m68kpc_offset; + dp = get_iword_1 (m68kpc_offset); m68kpc_offset += 2; disp8 = dp & 0xFF; r = (dp & 0x7000) >> 12; dispreg = dp & 0x8000 ? m68k_areg(regs,r) : m68k_dreg(regs,r); - if (!(dp & 0x800)) dispreg = (LONG)(WORD)(dispreg); + if (!(dp & 0x800)) dispreg = (uae_s32)(uae_s16)(dispreg); dispreg <<= (dp >> 9) & 3; - + if (dp & 0x100) { - LONG outer = 0,disp = 0; - LONG base = addr; - char name[10]; - sprintf(name,"PC, "); - if (dp & 0x80) { base = 0; name[0] = 0; } - if (dp & 0x80) base = 0; - if (dp & 0x40) dispreg = 0; - if ((dp & 0x30) == 0x20) disp = (LONG)(WORD)nextiword(); - if ((dp & 0x30) == 0x30) disp = nextilong(); - base += disp; - - if ((dp & 0x3) == 0x2) outer = (LONG)(WORD)nextiword(); - if ((dp & 0x3) == 0x3) outer = nextilong(); - - if (!(dp & 4)) base += dispreg; - if (dp & 3) base = get_long (base); - if (dp & 4) base += dispreg; - - addr = base + outer; - sprintf(buffer,"(%s%c%d.%c*%d+%ld)+%ld == $%08lx", name, - dp & 0x8000 ? 'A' : 'D', (int)r, dp & 0x800 ? 'L' : 'W', - 1 << ((dp >> 9) & 3), - disp,outer, - (long unsigned int)addr); + uae_s32 outer = 0,disp = 0; + uae_s32 base = addr; + char name[10]; + sprintf (name,"PC, "); + if (dp & 0x80) { base = 0; name[0] = 0; } + if (dp & 0x40) dispreg = 0; + if ((dp & 0x30) == 0x20) { disp = (uae_s32)(uae_s16)get_iword_1 (m68kpc_offset); m68kpc_offset += 2; } + if ((dp & 0x30) == 0x30) { disp = get_ilong_1 (m68kpc_offset); m68kpc_offset += 4; } + base += disp; + + if ((dp & 0x3) == 0x2) { outer = (uae_s32)(uae_s16)get_iword_1 (m68kpc_offset); m68kpc_offset += 2; } + if ((dp & 0x3) == 0x3) { outer = get_ilong_1 (m68kpc_offset); m68kpc_offset += 4; } + + if (!(dp & 4)) base += dispreg; + if (dp & 3) base = get_long (base); + if (dp & 4) base += dispreg; + + addr = base + outer; + sprintf (buffer,"(%s%c%d.%c*%d+%ld)+%ld == $%08lx", name, + dp & 0x8000 ? 'A' : 'D', (int)r, dp & 0x800 ? 'L' : 'W', + 1 << ((dp >> 9) & 3), + disp,outer, + (unsigned long)addr); } else { - addr += (LONG)((BYTE)disp8) + dispreg; - sprintf(buffer,"(PC, %c%d.%c*%d, $%02x) == $%08lx", dp & 0x8000 ? 'A' : 'D', + addr += (uae_s32)((uae_s8)disp8) + dispreg; + sprintf (buffer,"(PC, %c%d.%c*%d, $%02x) == $%08lx", dp & 0x8000 ? 'A' : 'D', (int)r, dp & 0x800 ? 'L' : 'W', 1 << ((dp >> 9) & 3), - disp8, (long unsigned int)addr); + disp8, (unsigned long)addr); } break; case absw: - sprintf(buffer,"$%08lx", (long unsigned int)(LONG)(WORD)nextiword()); + sprintf (buffer,"$%08lx", (unsigned long)(uae_s32)(uae_s16)get_iword_1 (m68kpc_offset)); + m68kpc_offset += 2; break; case absl: - sprintf(buffer,"$%08lx", (long unsigned int)nextilong()); + sprintf (buffer,"$%08lx", (unsigned long)get_ilong_1 (m68kpc_offset)); + m68kpc_offset += 4; break; case imm: - switch(size){ + switch (size){ case sz_byte: - sprintf(buffer,"#$%02x", (unsigned int)(nextiword() & 0xff)); break; + sprintf (buffer,"#$%02x", (unsigned int)(get_iword_1 (m68kpc_offset) & 0xff)); + m68kpc_offset += 2; + break; case sz_word: - sprintf(buffer,"#$%04x", (unsigned int)(nextiword() & 0xffff)); break; + sprintf (buffer,"#$%04x", (unsigned int)(get_iword_1 (m68kpc_offset) & 0xffff)); + m68kpc_offset += 2; + break; case sz_long: - sprintf(buffer,"#$%08lx", (long unsigned int)(nextilong())); break; + sprintf (buffer,"#$%08lx", (unsigned long)(get_ilong_1 (m68kpc_offset))); + m68kpc_offset += 4; + break; default: break; } break; case imm0: - offset = (LONG)(BYTE)nextiword(); - sprintf(buffer,"#$%02x", (unsigned int)(offset & 0xff)); + offset = (uae_s32)(uae_s8)get_iword_1 (m68kpc_offset); + m68kpc_offset += 2; + sprintf (buffer,"#$%02x", (unsigned int)(offset & 0xff)); break; case imm1: - offset = (LONG)(WORD)nextiword(); - sprintf(buffer,"#$%04x", (unsigned int)(offset & 0xffff)); + offset = (uae_s32)(uae_s16)get_iword_1 (m68kpc_offset); + m68kpc_offset += 2; + sprintf (buffer,"#$%04x", (unsigned int)(offset & 0xffff)); break; case imm2: - offset = (LONG)nextilong(); - sprintf(buffer,"#$%08lx", (long unsigned int)offset); + offset = (uae_s32)get_ilong_1 (m68kpc_offset); + m68kpc_offset += 4; + sprintf (buffer,"#$%08lx", (unsigned long)offset); break; case immi: - offset = (LONG)(BYTE)(reg & 0xff); - sprintf(buffer,"#$%08lx", (long unsigned int)offset); + offset = (uae_s32)(uae_s8)(reg & 0xff); + sprintf (buffer,"#$%08lx", (unsigned long)offset); break; default: break; } if (buf == 0) - printf("%s", buffer); + fprintf (f, "%s", buffer); else - strcat(buf, buffer); + strcat (buf, buffer); return offset; } -void MakeSR(void) +/* The plan is that this will take over the job of exception 3 handling - + * the CPU emulation functions will just do a longjmp to m68k_go whenever + * they hit an odd address. */ +static int verify_ea (int reg, amodes mode, wordsizes size, uae_u32 *val) +{ + uae_u16 dp; + uae_s8 disp8; + uae_s16 disp16; + int r; + uae_u32 dispreg; + uaecptr addr; + uae_s32 offset = 0; + + switch (mode){ + case Dreg: + *val = m68k_dreg (regs, reg); + return 1; + case Areg: + *val = m68k_areg (regs, reg); + return 1; + + case Aind: + case Aipi: + addr = m68k_areg (regs, reg); + break; + case Apdi: + addr = m68k_areg (regs, reg); + break; + case Ad16: + disp16 = get_iword_1 (m68kpc_offset); m68kpc_offset += 2; + addr = m68k_areg(regs,reg) + (uae_s16)disp16; + break; + case Ad8r: + addr = m68k_areg (regs, reg); + d8r_common: + dp = get_iword_1 (m68kpc_offset); m68kpc_offset += 2; + disp8 = dp & 0xFF; + r = (dp & 0x7000) >> 12; + dispreg = dp & 0x8000 ? m68k_areg(regs,r) : m68k_dreg(regs,r); + if (!(dp & 0x800)) dispreg = (uae_s32)(uae_s16)(dispreg); + dispreg <<= (dp >> 9) & 3; + + if (dp & 0x100) { + uae_s32 outer = 0, disp = 0; + uae_s32 base = addr; + if (dp & 0x80) base = 0; + if (dp & 0x40) dispreg = 0; + if ((dp & 0x30) == 0x20) { disp = (uae_s32)(uae_s16)get_iword_1 (m68kpc_offset); m68kpc_offset += 2; } + if ((dp & 0x30) == 0x30) { disp = get_ilong_1 (m68kpc_offset); m68kpc_offset += 4; } + base += disp; + + if ((dp & 0x3) == 0x2) { outer = (uae_s32)(uae_s16)get_iword_1 (m68kpc_offset); m68kpc_offset += 2; } + if ((dp & 0x3) == 0x3) { outer = get_ilong_1 (m68kpc_offset); m68kpc_offset += 4; } + + if (!(dp & 4)) base += dispreg; + if (dp & 3) base = get_long (base); + if (dp & 4) base += dispreg; + + addr = base + outer; + } else { + addr += (uae_s32)((uae_s8)disp8) + dispreg; + } + break; + case PC16: + addr = m68k_getpc () + m68kpc_offset; + disp16 = get_iword_1 (m68kpc_offset); m68kpc_offset += 2; + addr += (uae_s16)disp16; + break; + case PC8r: + addr = m68k_getpc () + m68kpc_offset; + goto d8r_common; + case absw: + addr = (uae_s32)(uae_s16)get_iword_1 (m68kpc_offset); + m68kpc_offset += 2; + break; + case absl: + addr = get_ilong_1 (m68kpc_offset); + m68kpc_offset += 4; + break; + case imm: + switch (size){ + case sz_byte: + *val = get_iword_1 (m68kpc_offset) & 0xff; + m68kpc_offset += 2; + break; + case sz_word: + *val = get_iword_1 (m68kpc_offset) & 0xffff; + m68kpc_offset += 2; + break; + case sz_long: + *val = get_ilong_1 (m68kpc_offset); + m68kpc_offset += 4; + break; + default: + break; + } + return 1; + case imm0: + *val = (uae_s32)(uae_s8)get_iword_1 (m68kpc_offset); + m68kpc_offset += 2; + return 1; + case imm1: + *val = (uae_s32)(uae_s16)get_iword_1 (m68kpc_offset); + m68kpc_offset += 2; + return 1; + case imm2: + *val = get_ilong_1 (m68kpc_offset); + m68kpc_offset += 4; + return 1; + case immi: + *val = (uae_s32)(uae_s8)(reg & 0xff); + return 1; + default: + addr = 0; + break; + } + if ((addr & 1) == 0) + return 1; + + last_addr_for_exception_3 = m68k_getpc () + m68kpc_offset; + last_fault_for_exception_3 = addr; + last_writeaccess_for_exception_3 = 0; + last_instructionaccess_for_exception_3 = 0; + return 0; +} + +uae_u32 get_disp_ea_020 (uae_u32 base, uae_u32 dp) +{ + int reg = (dp >> 12) & 15; + uae_s32 regd = regs.regs[reg]; + if ((dp & 0x800) == 0) + regd = (uae_s32)(uae_s16)regd; + regd <<= (dp >> 9) & 3; + if (dp & 0x100) { + uae_s32 outer = 0; + if (dp & 0x80) base = 0; + if (dp & 0x40) regd = 0; + + if ((dp & 0x30) == 0x20) base += (uae_s32)(uae_s16)next_iword(); + if ((dp & 0x30) == 0x30) base += next_ilong(); + + if ((dp & 0x3) == 0x2) outer = (uae_s32)(uae_s16)next_iword(); + if ((dp & 0x3) == 0x3) outer = next_ilong(); + + if ((dp & 0x4) == 0) base += regd; + if (dp & 0x3) base = get_long (base); + if (dp & 0x4) base += regd; + + return base + outer; + } else { + return base + (uae_s32)((uae_s8)dp) + regd; + } +} + +uae_u32 get_disp_ea_000 (uae_u32 base, uae_u32 dp) +{ + int reg = (dp >> 12) & 15; + uae_s32 regd = regs.regs[reg]; +#if 1 + if ((dp & 0x800) == 0) + regd = (uae_s32)(uae_s16)regd; + return base + (uae_s8)dp + regd; +#else + /* Branch-free code... benchmark this again now that + * things are no longer inline. */ + uae_s32 regd16; + uae_u32 mask; + mask = ((dp & 0x800) >> 11) - 1; + regd16 = (uae_s32)(uae_s16)regd; + regd16 &= mask; + mask = ~mask; + base += (uae_s8)dp; + regd &= mask; + regd |= regd16; + return base + regd; +#endif +} + +void MakeSR (void) { #if 0 assert((regs.t1 & 1) == regs.t1); @@ -359,11 +649,11 @@ void MakeSR(void) #endif regs.sr = ((regs.t1 << 15) | (regs.t0 << 14) | (regs.s << 13) | (regs.m << 12) | (regs.intmask << 8) - | (XFLG << 4) | (NFLG << 3) | (ZFLG << 2) | (VFLG << 1) - | CFLG); + | (GET_XFLG << 4) | (GET_NFLG << 3) | (GET_ZFLG << 2) | (GET_VFLG << 1) + | GET_CFLG); } -void MakeFromSR(void) +void MakeFromSR (void) { int oldm = regs.m; int olds = regs.s; @@ -373,23 +663,23 @@ void MakeFromSR(void) regs.s = (regs.sr >> 13) & 1; regs.m = (regs.sr >> 12) & 1; regs.intmask = (regs.sr >> 8) & 7; - XFLG = (regs.sr >> 4) & 1; - NFLG = (regs.sr >> 3) & 1; - ZFLG = (regs.sr >> 2) & 1; - VFLG = (regs.sr >> 1) & 1; - CFLG = regs.sr & 1; - if (CPU_LEVEL >= 2) { + SET_XFLG ((regs.sr >> 4) & 1); + SET_NFLG ((regs.sr >> 3) & 1); + SET_ZFLG ((regs.sr >> 2) & 1); + SET_VFLG ((regs.sr >> 1) & 1); + SET_CFLG (regs.sr & 1); + if (currprefs.cpu_level >= 2) { if (olds != regs.s) { - if (olds) { - if (oldm) - regs.msp = m68k_areg(regs, 7); - else - regs.isp = m68k_areg(regs, 7); - m68k_areg(regs, 7) = regs.usp; - } else { - regs.usp = m68k_areg(regs, 7); - m68k_areg(regs, 7) = regs.m ? regs.msp : regs.isp; - } + if (olds) { + if (oldm) + regs.msp = m68k_areg(regs, 7); + else + regs.isp = m68k_areg(regs, 7); + m68k_areg(regs, 7) = regs.usp; + } else { + regs.usp = m68k_areg(regs, 7); + m68k_areg(regs, 7) = regs.m ? regs.msp : regs.isp; + } } else if (olds && oldm != regs.m) { if (oldm) { regs.msp = m68k_areg(regs, 7); @@ -401,136 +691,264 @@ void MakeFromSR(void) } } else { if (olds != regs.s) { - if (olds) { - regs.isp = m68k_areg(regs, 7); - m68k_areg(regs, 7) = regs.usp; - } else { - regs.usp = m68k_areg(regs, 7); - m68k_areg(regs, 7) = regs.isp; - } - } + if (olds) { + regs.isp = m68k_areg(regs, 7); + m68k_areg(regs, 7) = regs.usp; + } else { + regs.usp = m68k_areg(regs, 7); + m68k_areg(regs, 7) = regs.isp; + } + } } - - regs.spcflags |= SPCFLAG_INT; + + set_special (SPCFLAG_INT); if (regs.t1 || regs.t0) - regs.spcflags |= SPCFLAG_TRACE; + set_special (SPCFLAG_TRACE); else - regs.spcflags &= ~(SPCFLAG_TRACE | SPCFLAG_DOTRACE); + /* Keep SPCFLAG_DOTRACE, we still want a trace exception for + SR-modifying instructions (including STOP). */ + unset_special (SPCFLAG_TRACE); } -void Exception(int nr, CPTR oldpc) +static void exception_trace (int nr) { - compiler_flush_jsr_stack(); + unset_special (SPCFLAG_TRACE | SPCFLAG_DOTRACE); + if (regs.t1 && !regs.t0) { + /* trace stays pending if exception is div by zero, chk, + * trapv or trap #x + */ + if (nr == 5 || nr == 6 || nr == 7 || (nr >= 32 && nr <= 47)) + set_special (SPCFLAG_DOTRACE); + } + regs.t1 = regs.t0 = regs.m = 0; +} + +static void exception_debug (int nr) +{ +#ifdef DEBUGGER + if (!exception_debugging) + return; + console_out ("Exception %d, PC=%08.8X\n", nr, m68k_getpc()); +#endif +} + +void Exception_normal (int nr, uaecptr oldpc) +{ + uae_u32 currpc = m68k_getpc (), newpc; + int sv = regs.s; + + exception_debug (nr); MakeSR(); + if (!regs.s) { regs.usp = m68k_areg(regs, 7); - if (CPU_LEVEL >= 2) - m68k_areg(regs, 7) = regs.m ? regs.msp : regs.isp; - else - m68k_areg(regs, 7) = regs.isp; + if (currprefs.cpu_level >= 2) + m68k_areg(regs, 7) = regs.m ? regs.msp : regs.isp; + else + m68k_areg(regs, 7) = regs.isp; regs.s = 1; } - if (CPU_LEVEL > 0) { + if (currprefs.cpu_level > 0) { if (nr == 2 || nr == 3) { int i; - for (i = 0 ; i < 12 ; i++) { + if (currprefs.cpu_level >= 4) { /* 68040 */ + if (nr == 2) { + for (i = 0 ; i < 18 ; i++) { + m68k_areg(regs, 7) -= 2; + put_word (m68k_areg(regs, 7), 0); + } + m68k_areg(regs, 7) -= 4; + put_long (m68k_areg(regs, 7), last_fault_for_exception_3); + m68k_areg(regs, 7) -= 2; + put_word (m68k_areg(regs, 7), 0); + m68k_areg(regs, 7) -= 2; + put_word (m68k_areg(regs, 7), 0); + m68k_areg(regs, 7) -= 2; + put_word (m68k_areg(regs, 7), 0); + m68k_areg(regs, 7) -= 2; + put_word (m68k_areg(regs, 7), 0x0140 | (sv ? 6 : 2)); /* SSW */ + m68k_areg(regs, 7) -= 4; + put_long (m68k_areg(regs, 7), last_addr_for_exception_3); + m68k_areg(regs, 7) -= 2; + put_word (m68k_areg(regs, 7), 0x7000 + nr * 4); + } else { + m68k_areg(regs, 7) -= 4; + put_long (m68k_areg(regs, 7), last_fault_for_exception_3); + m68k_areg(regs, 7) -= 2; + put_word (m68k_areg(regs, 7), 0x2000 + nr * 4); + } + } else { + uae_u16 ssw = (sv ? 4 : 0) | (last_instructionaccess_for_exception_3 ? 2 : 1); + ssw |= last_writeaccess_for_exception_3 ? 0 : 0x40; + ssw |= 0x20; + for (i = 0 ; i < 36; i++) { + m68k_areg(regs, 7) -= 2; + put_word (m68k_areg(regs, 7), 0); + } + m68k_areg(regs, 7) -= 4; + put_long (m68k_areg(regs, 7), last_fault_for_exception_3); + m68k_areg(regs, 7) -= 2; + put_word (m68k_areg(regs, 7), 0); + m68k_areg(regs, 7) -= 2; + put_word (m68k_areg(regs, 7), 0); m68k_areg(regs, 7) -= 2; put_word (m68k_areg(regs, 7), 0); + m68k_areg(regs, 7) -= 2; + put_word (m68k_areg(regs, 7), ssw); + m68k_areg(regs, 7) -= 2; + put_word (m68k_areg(regs, 7), 0xb000 + nr * 4); } - m68k_areg(regs, 7) -= 2; - put_word (m68k_areg(regs, 7), 0xa000 + nr * 4); + write_log ("Exception %d (%x) at %x -> %x!\n", nr, oldpc, currpc, get_long (regs.vbr + 4*nr)); } else if (nr ==5 || nr == 6 || nr == 7 || nr == 9) { - m68k_areg(regs, 7) -= 4; - put_long (m68k_areg(regs, 7), oldpc); - m68k_areg(regs, 7) -= 2; - put_word (m68k_areg(regs, 7), 0x2000 + nr * 4); - } else if (regs.m && nr >= 24 && nr < 32) { - m68k_areg(regs, 7) -= 2; - put_word (m68k_areg(regs, 7), nr * 4); - m68k_areg(regs, 7) -= 4; - put_long (m68k_areg(regs, 7), m68k_getpc ()); - m68k_areg(regs, 7) -= 2; - put_word (m68k_areg(regs, 7), regs.sr); - regs.sr |= (1 << 13); - regs.msp = m68k_areg(regs, 7); - m68k_areg(regs, 7) = regs.isp; - m68k_areg(regs, 7) -= 2; - put_word (m68k_areg(regs, 7), 0x1000 + nr * 4); - } else { - m68k_areg(regs, 7) -= 2; - put_word (m68k_areg(regs, 7), nr * 4); - } + m68k_areg(regs, 7) -= 4; + put_long (m68k_areg(regs, 7), oldpc); + m68k_areg(regs, 7) -= 2; + put_word (m68k_areg(regs, 7), 0x2000 + nr * 4); + } else if (regs.m && nr >= 24 && nr < 32) { /* M + Interrupt */ + m68k_areg(regs, 7) -= 2; + put_word (m68k_areg(regs, 7), nr * 4); + m68k_areg(regs, 7) -= 4; + put_long (m68k_areg(regs, 7), currpc); + m68k_areg(regs, 7) -= 2; + put_word (m68k_areg(regs, 7), regs.sr); + regs.sr |= (1 << 13); + regs.msp = m68k_areg(regs, 7); + m68k_areg(regs, 7) = regs.isp; + m68k_areg(regs, 7) -= 2; + put_word (m68k_areg(regs, 7), 0x1000 + nr * 4); + } else { + m68k_areg(regs, 7) -= 2; + put_word (m68k_areg(regs, 7), nr * 4); + } + } else if (nr == 2 || nr == 3) { + uae_u16 mode = (sv ? 4 : 0) | (last_instructionaccess_for_exception_3 ? 2 : 1); + mode |= last_writeaccess_for_exception_3 ? 0 : 16; + m68k_areg(regs, 7) -= 14; + /* fixme: bit3=I/N */ + put_word (m68k_areg(regs, 7) + 0, mode); + put_long (m68k_areg(regs, 7) + 2, last_fault_for_exception_3); + put_word (m68k_areg(regs, 7) + 6, last_op_for_exception_3); + put_word (m68k_areg(regs, 7) + 8, regs.sr); + put_long (m68k_areg(regs, 7) + 10, last_addr_for_exception_3); + write_log ("Exception %d (%x) at %x -> %x!\n", nr, oldpc, currpc, get_long (regs.vbr + 4*nr)); + goto kludge_me_do; } m68k_areg(regs, 7) -= 4; - put_long (m68k_areg(regs, 7), m68k_getpc ()); + put_long (m68k_areg(regs, 7), currpc); m68k_areg(regs, 7) -= 2; put_word (m68k_areg(regs, 7), regs.sr); - m68k_setpc(get_long(regs.vbr + 4*nr)); - regs.t1 = regs.t0 = regs.m = 0; - regs.spcflags &= ~(SPCFLAG_TRACE | SPCFLAG_DOTRACE); +kludge_me_do: + newpc = get_long (regs.vbr + 4 * nr); + if (newpc & 1) { + if (nr == 2 || nr == 3) + uae_reset (); /* there is nothing else we can do.. */ + else + exception3 (regs.ir, m68k_getpc(), newpc); + return; + } + m68k_setpc (newpc); + fill_prefetch_slow (); + exception_trace (nr); +} + +void Exception (int nr, uaecptr oldpc) +{ + Exception_normal (nr, oldpc); } -static void Interrupt(int nr) +static void Interrupt (int nr) { + regs.stopped = 0; + unset_special (SPCFLAG_STOP); assert(nr < 8 && nr >= 0); lastint_regs = regs; lastint_no = nr; - Exception(nr+24, 0); - + Exception (nr + 24, 0); + regs.intmask = nr; - regs.spcflags |= SPCFLAG_INT; + set_special (SPCFLAG_INT); } -static int caar, cacr; +static uae_u32 caar, cacr, itt0, itt1, dtt0, dtt1, tc, mmusr, urp, srp; -void m68k_move2c (int regno, ULONG *regp) +int m68k_move2c (int regno, uae_u32 *regp) { - if (CPU_LEVEL == 1 && (regno & 0x7FF) > 1) + if ((currprefs.cpu_level == 1 && (regno & 0x7FF) > 1) + || (currprefs.cpu_level < 4 && (regno & 0x7FF) > 2) + || (currprefs.cpu_level == 4 && regno == 0x802)) + { op_illg (0x4E7B); - else + return 0; + } else { switch (regno) { - case 0: regs.sfc = *regp & 7; break; - case 1: regs.dfc = *regp & 7; break; - case 2: cacr = *regp & 0x3; break; /* ignore C and CE */ - case 0x800: regs.usp = *regp; break; - case 0x801: regs.vbr = *regp; break; - case 0x802: caar = *regp &0xfc; break; - case 0x803: regs.msp = *regp; if (regs.m == 1) m68k_areg(regs, 7) = regs.msp; break; - case 0x804: regs.isp = *regp; if (regs.m == 0) m68k_areg(regs, 7) = regs.isp; break; - default: + case 0: regs.sfc = *regp & 7; break; + case 1: regs.dfc = *regp & 7; break; + case 2: cacr = *regp & (currprefs.cpu_level < 4 ? 0x3 : 0x80008000); break; + case 3: tc = *regp & 0xc000; break; + /* Mask out fields that should be zero. */ + case 4: itt0 = *regp & 0xffffe364; break; + case 5: itt1 = *regp & 0xffffe364; break; + case 6: dtt0 = *regp & 0xffffe364; break; + case 7: dtt1 = *regp & 0xffffe364; break; + + case 0x800: regs.usp = *regp; break; + case 0x801: regs.vbr = *regp; break; + case 0x802: caar = *regp & 0xfc; break; + case 0x803: regs.msp = *regp; if (regs.m == 1) m68k_areg(regs, 7) = regs.msp; break; + case 0x804: regs.isp = *regp; if (regs.m == 0) m68k_areg(regs, 7) = regs.isp; break; + case 0x805: mmusr = *regp; break; + case 0x806: urp = *regp; break; + case 0x807: srp = *regp; break; + default: op_illg (0x4E7B); - break; + return 0; } + } + return 1; } -void m68k_movec2 (int regno, ULONG *regp) +int m68k_movec2 (int regno, uae_u32 *regp) { - if (CPU_LEVEL == 1 && (regno & 0x7FF) > 1) + if ((currprefs.cpu_level == 1 && (regno & 0x7FF) > 1) + || (currprefs.cpu_level < 4 && (regno & 0x7FF) > 2) + || (currprefs.cpu_level == 4 && regno == 0x802)) + { op_illg (0x4E7A); - else + return 0; + } else { switch (regno) { - case 0: *regp = regs.sfc; break; - case 1: *regp = regs.dfc; break; - case 2: *regp = cacr; break; - case 0x800: *regp = regs.usp; break; - case 0x801: *regp = regs.vbr; break; - case 0x802: *regp = caar; break; - case 0x803: *regp = regs.m == 1 ? m68k_areg(regs, 7) : regs.msp; break; - case 0x804: *regp = regs.m == 0 ? m68k_areg(regs, 7) : regs.isp; break; - default: + case 0: *regp = regs.sfc; break; + case 1: *regp = regs.dfc; break; + case 2: *regp = cacr; break; + case 3: *regp = tc; break; + case 4: *regp = itt0; break; + case 5: *regp = itt1; break; + case 6: *regp = dtt0; break; + case 7: *regp = dtt1; break; + case 0x800: *regp = regs.usp; break; + case 0x801: *regp = regs.vbr; break; + case 0x802: *regp = caar; break; + case 0x803: *regp = regs.m == 1 ? m68k_areg(regs, 7) : regs.msp; break; + case 0x804: *regp = regs.m == 0 ? m68k_areg(regs, 7) : regs.isp; break; + case 0x805: *regp = mmusr; break; + case 0x806: *regp = urp; break; + case 0x807: *regp = srp; break; + default: op_illg (0x4E7A); - break; + return 0; } + } + return 1; } -static __inline__ int -div_unsigned(ULONG src_hi, ULONG src_lo, ULONG div, ULONG *quot, ULONG *rem) +STATIC_INLINE int +div_unsigned(uae_u32 src_hi, uae_u32 src_lo, uae_u32 div, uae_u32 *quot, uae_u32 *rem) { - ULONG q = 0, cbit = 0; + uae_u32 q = 0, cbit = 0; int i; if (div <= src_hi) { - return(1); + return 1; } for (i = 0 ; i < 32 ; i++) { cbit = src_hi & 0x80000000ul; @@ -545,118 +963,123 @@ div_unsigned(ULONG src_hi, ULONG src_lo, } *quot = q; *rem = src_hi; - return(0); + return 0; } -void m68k_divl (ULONG opcode, ULONG src, UWORD extra, CPTR oldpc) +void m68k_divl (uae_u32 opcode, uae_u32 src, uae_u16 extra, uaecptr oldpc) { -#if defined(INT_64BIT) +#if defined(uae_s64) if (src == 0) { - Exception(5,oldpc-2); + Exception (5, oldpc); return; } if (extra & 0x800) { /* signed variant */ - INT_64BIT a = (INT_64BIT)(LONG)m68k_dreg(regs, (extra >> 12) & 7); - INT_64BIT quot, rem; - + uae_s64 a = (uae_s64)(uae_s32)m68k_dreg(regs, (extra >> 12) & 7); + uae_s64 quot, rem; + if (extra & 0x400) { - a &= 0xffffffffLL; - a |= (INT_64BIT)m68k_dreg(regs, extra & 7) << 32; + a &= 0xffffffffu; + a |= (uae_s64)m68k_dreg(regs, extra & 7) << 32; } - rem = a % (INT_64BIT)(LONG)src; - quot = a / (INT_64BIT)(LONG)src; - if ((quot & 0xffffffff80000000uLL) != 0 && - (quot & 0xffffffff80000000uLL) != 0xffffffff80000000uLL) { - VFLG = NFLG = 1; - CFLG = 0; - } - else { - if (((LONG)rem < 0) != ((INT_64BIT)a < 0)) rem = -rem; - VFLG = CFLG = 0; - ZFLG = ((LONG)quot) == 0; - NFLG = ((LONG)quot) < 0; + rem = a % (uae_s64)(uae_s32)src; + quot = a / (uae_s64)(uae_s32)src; + if ((quot & UVAL64(0xffffffff80000000)) != 0 + && (quot & UVAL64(0xffffffff80000000)) != UVAL64(0xffffffff80000000)) + { + SET_VFLG (1); + SET_NFLG (1); + SET_CFLG (0); + } else { + if (((uae_s32)rem < 0) != ((uae_s64)a < 0)) rem = -rem; + SET_VFLG (0); + SET_CFLG (0); + SET_ZFLG (((uae_s32)quot) == 0); + SET_NFLG (((uae_s32)quot) < 0); m68k_dreg(regs, extra & 7) = rem; m68k_dreg(regs, (extra >> 12) & 7) = quot; } } else { /* unsigned */ - unsigned INT_64BIT a = (unsigned INT_64BIT)(ULONG)m68k_dreg(regs, (extra >> 12) & 7); - unsigned INT_64BIT quot, rem; - + uae_u64 a = (uae_u64)(uae_u32)m68k_dreg(regs, (extra >> 12) & 7); + uae_u64 quot, rem; + if (extra & 0x400) { - a &= 0xffffffffLL; - a |= (unsigned INT_64BIT)m68k_dreg(regs, extra & 7) << 32; + a &= 0xffffffffu; + a |= (uae_u64)m68k_dreg(regs, extra & 7) << 32; } - rem = a % (unsigned INT_64BIT)src; - quot = a / (unsigned INT_64BIT)src; - if (quot > 0xffffffffLL) { - VFLG = NFLG = 1; - CFLG = 0; - } - else { - VFLG = CFLG = 0; - ZFLG = ((LONG)quot) == 0; - NFLG = ((LONG)quot) < 0; + rem = a % (uae_u64)src; + quot = a / (uae_u64)src; + if (quot > 0xffffffffu) { + SET_VFLG (1); + SET_NFLG (1); + SET_CFLG (0); + } else { + SET_VFLG (0); + SET_CFLG (0); + SET_ZFLG (((uae_s32)quot) == 0); + SET_NFLG (((uae_s32)quot) < 0); m68k_dreg(regs, extra & 7) = rem; m68k_dreg(regs, (extra >> 12) & 7) = quot; } } #else if (src == 0) { - Exception(5,oldpc-2); + Exception (5, oldpc); return; } if (extra & 0x800) { /* signed variant */ - LONG lo = (LONG)m68k_dreg(regs, (extra >> 12) & 7); - LONG hi = lo < 0 ? -1 : 0; - LONG save_high; - ULONG quot, rem; - ULONG sign; - + uae_s32 lo = (uae_s32)m68k_dreg(regs, (extra >> 12) & 7); + uae_s32 hi = lo < 0 ? -1 : 0; + uae_s32 save_high; + uae_u32 quot, rem; + uae_u32 sign; + if (extra & 0x400) { - hi = (LONG)m68k_dreg(regs, extra & 7); + hi = (uae_s32)m68k_dreg(regs, extra & 7); } save_high = hi; sign = (hi ^ src); if (hi < 0) { - hi = ~hi; - lo = -lo; - if (lo == 0) hi++; + hi = ~hi; + lo = -lo; + if (lo == 0) hi++; } - if ((LONG)src < 0) src = -src; + if ((uae_s32)src < 0) src = -src; if (div_unsigned(hi, lo, src, ", &rem) || (sign & 0x80000000) ? quot > 0x80000000 : quot > 0x7fffffff) { - VFLG = NFLG = 1; - CFLG = 0; - } - else { + SET_VFLG (1); + SET_NFLG (1); + SET_CFLG (0); + } else { if (sign & 0x80000000) quot = -quot; - if (((LONG)rem < 0) != (save_high < 0)) rem = -rem; - VFLG = CFLG = 0; - ZFLG = ((LONG)quot) == 0; - NFLG = ((LONG)quot) < 0; + if (((uae_s32)rem < 0) != (save_high < 0)) rem = -rem; + SET_VFLG (0); + SET_CFLG (0); + SET_ZFLG (((uae_s32)quot) == 0); + SET_NFLG (((uae_s32)quot) < 0); m68k_dreg(regs, extra & 7) = rem; m68k_dreg(regs, (extra >> 12) & 7) = quot; } } else { /* unsigned */ - ULONG lo = (ULONG)m68k_dreg(regs, (extra >> 12) & 7); - ULONG hi = 0; - ULONG quot, rem; - + uae_u32 lo = (uae_u32)m68k_dreg(regs, (extra >> 12) & 7); + uae_u32 hi = 0; + uae_u32 quot, rem; + if (extra & 0x400) { - hi = (ULONG)m68k_dreg(regs, extra & 7); + hi = (uae_u32)m68k_dreg(regs, extra & 7); } if (div_unsigned(hi, lo, src, ", &rem)) { - VFLG = NFLG = 1; - CFLG = 0; - } - else { - VFLG = CFLG = 0; - ZFLG = ((LONG)quot) == 0; - NFLG = ((LONG)quot) < 0; + SET_VFLG (1); + SET_NFLG (1); + SET_CFLG (0); + } else { + SET_VFLG (0); + SET_CFLG (0); + SET_ZFLG (((uae_s32)quot) == 0); + SET_NFLG (((uae_s32)quot) < 0); m68k_dreg(regs, extra & 7) = rem; m68k_dreg(regs, (extra >> 12) & 7) = quot; } @@ -664,100 +1087,106 @@ void m68k_divl (ULONG opcode, ULONG src, #endif } -static __inline__ void -mul_unsigned(ULONG src1, ULONG src2, ULONG *dst_hi, ULONG *dst_lo) +STATIC_INLINE void +mul_unsigned(uae_u32 src1, uae_u32 src2, uae_u32 *dst_hi, uae_u32 *dst_lo) { - ULONG r0 = (src1 & 0xffff) * (src2 & 0xffff); - ULONG r1 = ((src1 >> 16) & 0xffff) * (src2 & 0xffff); - ULONG r2 = (src1 & 0xffff) * ((src2 >> 16) & 0xffff); - ULONG r3 = ((src1 >> 16) & 0xffff) * ((src2 >> 16) & 0xffff); - ULONG lo; - - lo = r0 + ((r1 << 16) & 0xffff0000ul); - if (lo < r0) r3++; - r0 = lo; - lo = r0 + ((r2 << 16) & 0xffff0000ul); - if (lo < r0) r3++; - r3 += ((r1 >> 16) & 0xffff) + ((r2 >> 16) & 0xffff); + uae_u32 r0 = (src1 & 0xffff) * (src2 & 0xffff); + uae_u32 r1 = ((src1 >> 16) & 0xffff) * (src2 & 0xffff); + uae_u32 r2 = (src1 & 0xffff) * ((src2 >> 16) & 0xffff); + uae_u32 r3 = ((src1 >> 16) & 0xffff) * ((src2 >> 16) & 0xffff); + uae_u32 lo; + + lo = r0 + ((r1 << 16) & 0xffff0000ul); + if (lo < r0) r3++; + r0 = lo; + lo = r0 + ((r2 << 16) & 0xffff0000ul); + if (lo < r0) r3++; + r3 += ((r1 >> 16) & 0xffff) + ((r2 >> 16) & 0xffff); *dst_lo = lo; *dst_hi = r3; } -void m68k_mull (ULONG opcode, ULONG src, UWORD extra) +void m68k_mull (uae_u32 opcode, uae_u32 src, uae_u16 extra) { -#if defined(INT_64BIT) +#if defined(uae_s64) if (extra & 0x800) { /* signed variant */ - INT_64BIT a = (INT_64BIT)(LONG)m68k_dreg(regs, (extra >> 12) & 7); + uae_s64 a = (uae_s64)(uae_s32)m68k_dreg(regs, (extra >> 12) & 7); - a *= (INT_64BIT)(LONG)src; - VFLG = CFLG = 0; - ZFLG = a == 0; - NFLG = a < 0; + a *= (uae_s64)(uae_s32)src; + SET_VFLG (0); + SET_CFLG (0); + SET_ZFLG (a == 0); + SET_NFLG (a < 0); if (extra & 0x400) m68k_dreg(regs, extra & 7) = a >> 32; - else if ((a & 0xffffffff80000000uLL) != 0 && - (a & 0xffffffff80000000uLL) != 0xffffffff80000000uLL) { - VFLG = 1; + else if ((a & UVAL64(0xffffffff80000000)) != 0 + && (a & UVAL64(0xffffffff80000000)) != UVAL64(0xffffffff80000000)) + { + SET_VFLG (1); } - m68k_dreg(regs, (extra >> 12) & 7) = (ULONG)a; + m68k_dreg(regs, (extra >> 12) & 7) = (uae_u32)a; } else { /* unsigned */ - unsigned INT_64BIT a = (unsigned INT_64BIT)(ULONG)m68k_dreg(regs, (extra >> 12) & 7); - - a *= (unsigned INT_64BIT)src; - VFLG = CFLG = 0; - ZFLG = a == 0; - NFLG = ((INT_64BIT)a) < 0; + uae_u64 a = (uae_u64)(uae_u32)m68k_dreg(regs, (extra >> 12) & 7); + + a *= (uae_u64)src; + SET_VFLG (0); + SET_CFLG (0); + SET_ZFLG (a == 0); + SET_NFLG (((uae_s64)a) < 0); if (extra & 0x400) m68k_dreg(regs, extra & 7) = a >> 32; - else if ((a & 0xffffffff00000000uLL) != 0) { - VFLG = 1; + else if ((a & UVAL64(0xffffffff00000000)) != 0) { + SET_VFLG (1); } - m68k_dreg(regs, (extra >> 12) & 7) = (ULONG)a; + m68k_dreg(regs, (extra >> 12) & 7) = (uae_u32)a; } #else if (extra & 0x800) { /* signed variant */ - LONG src1,src2; - ULONG dst_lo,dst_hi; - ULONG sign; + uae_s32 src1,src2; + uae_u32 dst_lo,dst_hi; + uae_u32 sign; - src1 = (LONG)src; - src2 = (LONG)m68k_dreg(regs, (extra >> 12) & 7); + src1 = (uae_s32)src; + src2 = (uae_s32)m68k_dreg(regs, (extra >> 12) & 7); sign = (src1 ^ src2); if (src1 < 0) src1 = -src1; if (src2 < 0) src2 = -src2; - mul_unsigned((ULONG)src1,(ULONG)src2,&dst_hi,&dst_lo); + mul_unsigned((uae_u32)src1,(uae_u32)src2,&dst_hi,&dst_lo); if (sign & 0x80000000) { dst_hi = ~dst_hi; dst_lo = -dst_lo; if (dst_lo == 0) dst_hi++; } - VFLG = CFLG = 0; - ZFLG = dst_hi == 0 && dst_lo == 0; - NFLG = ((LONG)dst_hi) < 0; + SET_VFLG (0); + SET_CFLG (0); + SET_ZFLG (dst_hi == 0 && dst_lo == 0); + SET_NFLG (((uae_s32)dst_hi) < 0); if (extra & 0x400) m68k_dreg(regs, extra & 7) = dst_hi; - else if ((dst_hi != 0 || (dst_lo & 0x80000000) != 0) && - ((dst_hi & 0xffffffff) != 0xffffffff || - (dst_lo & 0x80000000) != 0x80000000)) { - VFLG = 1; + else if ((dst_hi != 0 || (dst_lo & 0x80000000) != 0) + && ((dst_hi & 0xffffffff) != 0xffffffff + || (dst_lo & 0x80000000) != 0x80000000)) + { + SET_VFLG (1); } m68k_dreg(regs, (extra >> 12) & 7) = dst_lo; } else { /* unsigned */ - ULONG dst_lo,dst_hi; + uae_u32 dst_lo,dst_hi; + + mul_unsigned(src,(uae_u32)m68k_dreg(regs, (extra >> 12) & 7),&dst_hi,&dst_lo); - mul_unsigned(src,(ULONG)m68k_dreg(regs, (extra >> 12) & 7),&dst_hi,&dst_lo); - - VFLG = CFLG = 0; - ZFLG = dst_hi == 0 && dst_lo == 0; - NFLG = ((LONG)dst_hi) < 0; + SET_VFLG (0); + SET_CFLG (0); + SET_ZFLG (dst_hi == 0 && dst_lo == 0); + SET_NFLG (((uae_s32)dst_hi) < 0); if (extra & 0x400) m68k_dreg(regs, extra & 7) = dst_hi; else if (dst_hi != 0) { - VFLG = 1; + SET_VFLG (1); } m68k_dreg(regs, (extra >> 12) & 7) = dst_lo; } @@ -767,434 +1196,603 @@ static char* ccnames[] = { "T ","F ","HI","LS","CC","CS","NE","EQ", "VC","VS","PL","MI","GE","LT","GT","LE" }; -void m68k_reset(void) +void m68k_reset (void) { - m68k_areg(regs, 7) = get_long(0x00f80000); - m68k_setpc(get_long(0x00f80004)); - regs.kick_mask = 0xF80000; + regs.kick_mask = 0x00F80000; + regs.spcflags = 0; + if (savestate_state == STATE_RESTORE) { + m68k_setpc (regs.pc); + /* MakeFromSR() must not swap stack pointer */ + regs.s = (regs.sr >> 13) & 1; + MakeFromSR(); + /* set stack pointer */ + if (regs.s) + m68k_areg(regs, 7) = regs.isp; + else + m68k_areg(regs, 7) = regs.usp; + return; + } + + m68k_areg (regs, 7) = get_long (0x00f80000); + m68k_setpc (get_long (0x00f80004)); regs.s = 1; regs.m = 0; regs.stopped = 0; regs.t1 = 0; regs.t0 = 0; - ZFLG = CFLG = NFLG = VFLG = 0; - regs.spcflags = 0; + SET_ZFLG (0); + SET_XFLG (0); + SET_CFLG (0); + SET_VFLG (0); + SET_NFLG (0); regs.intmask = 7; regs.vbr = regs.sfc = regs.dfc = 0; regs.fpcr = regs.fpsr = regs.fpiar = 0; - customreset(); + regs.irc = 0xffff; + fill_prefetch_slow (); } -void REGPARAM2 op_illg(ULONG opcode) +unsigned long REGPARAM2 op_illg (uae_u32 opcode) { - compiler_flush_jsr_stack(); - if (opcode == 0x4E7B && get_long(0x10) == 0 - && (m68k_getpc() & 0xF80000) == 0xF80000) - { - fprintf(stderr, "Your Kickstart requires a 68020 CPU. Giving up.\n"); - broken_in = 1; - regs.spcflags |= SPCFLAG_BRK; + uaecptr pc = m68k_getpc (); + + if (cloanto_rom && (opcode & 0xF100) == 0x7100) { + m68k_dreg (regs, (opcode >> 9) & 7) = (uae_s8)(opcode & 0xFF); + m68k_incpc (2); + fill_prefetch_slow (); + return 4; + } + + if (opcode == 0x4E7B && get_long (0x10) == 0 && (pc & 0xF80000) == 0xF80000) { + write_log ("Your Kickstart requires a 68020 CPU. Giving up.\n"); + broken_in = 1; + set_special (SPCFLAG_BRK); quit_program = 1; } if (opcode == 0xFF0D) { - if ((m68k_getpc() & 0xF80000) == 0xF80000) { + if ((pc & 0xF80000) == 0xF80000) { /* This is from the dummy Kickstart replacement */ - ersatz_perform (nextiword ()); - return; - } else if ((m68k_getpc() & 0xF80000) == 0xF00000) { + uae_u16 arg = get_iword (2); + m68k_incpc (4); + ersatz_perform (arg); + fill_prefetch_slow (); + return 4; + } else if ((pc & 0xFFFF0000) == RTAREA_BASE) { /* User-mode STOP replacement */ - m68k_setstopped(1); - return; + m68k_setstopped (1); + return 4; } } -#ifdef USE_POINTER - regs.pc_p -= 2; -#else - regs.pc -= 2; -#endif + + if ((opcode & 0xF000) == 0xA000 && (pc & 0xFFFF0000) == RTAREA_BASE) { + /* Calltrap. */ + m68k_incpc(2); + call_calltrap (opcode & 0xFFF); + fill_prefetch_slow (); + return 4; + } + if ((opcode & 0xF000) == 0xF000) { Exception(0xB,0); - return; + return 4; } if ((opcode & 0xF000) == 0xA000) { - Exception(0xA,0); - return; + if ((pc & 0xFFFF0000) == RTAREA_BASE) { + /* Calltrap. */ + call_calltrap (opcode & 0xFFF); + } + Exception(0xA,0); + return 4; } - fprintf(stderr, "Illegal instruction: %04x at %08lx\n", opcode, m68k_getpc()); - Exception(4,0); +#if 1 + write_log ("Illegal instruction: %04x at %08lx\n", opcode, pc); +#endif + Exception (4,0); + return 4; } -void mmu_op(ULONG opcode, UWORD extra) +void mmu_op(uae_u32 opcode, uae_u16 extra) { - if ((extra & 0xB000) == 0) { /* PMOVE instruction */ - - } else if ((extra & 0xF000) == 0x2000) { /* PLOAD instruction */ - } else if ((extra & 0xF000) == 0x8000) { /* PTEST instruction */ + if ((opcode & 0xFE0) == 0x0500) { + /* PFLUSH */ + mmusr = 0; + write_log ("PFLUSH\n"); + } else if ((opcode & 0x0FD8) == 0x548) { + /* PTEST */ + write_log ("PTEST\n"); } else - op_illg(opcode); + op_illg (opcode); } -static int n_insns=0, n_spcinsns=0; +static int n_insns = 0, n_spcinsns = 0; -static CPTR last_trace_ad = 0; +static uaecptr last_trace_ad = 0; -static __inline__ void do_trace(void) +static void do_trace (void) { - if (regs.spcflags & SPCFLAG_TRACE) { /* 6 */ - if (regs.t0) { - UWORD opcode; - /* should also include TRAP, CHK, SR modification FPcc */ - /* probably never used so why bother */ - /* We can afford this to be inefficient... */ - m68k_setpc(m68k_getpc()); - opcode = get_word(regs.pc); - if (opcode == 0x4e72 /* RTE */ - || opcode == 0x4e74 /* RTD */ - || opcode == 0x4e75 /* RTS */ - || opcode == 0x4e77 /* RTR */ - || opcode == 0x4e76 /* TRAPV */ - || (opcode & 0xffc0) == 0x4e80 /* JSR */ - || (opcode & 0xffc0) == 0x4ec0 /* JMP */ - || (opcode & 0xff00) == 0x6100 /* BSR */ - || ((opcode & 0xf000) == 0x6000 /* Bcc */ - && cctrue((opcode >> 8) & 0xf)) - || ((opcode & 0xf0f0) == 0x5050 /* DBcc */ - && !cctrue((opcode >> 8) & 0xf) - && (WORD)m68k_dreg(regs, opcode & 7) != 0)) - { - last_trace_ad = m68k_getpc(); - regs.spcflags &= ~SPCFLAG_TRACE; - regs.spcflags |= SPCFLAG_DOTRACE; + if (regs.t0 && currprefs.cpu_level >= 2) { + uae_u16 opcode; + /* should also include TRAP, CHK, SR modification FPcc */ + /* probably never used so why bother */ + /* We can afford this to be inefficient... */ + m68k_setpc (m68k_getpc ()); + fill_prefetch_slow (); + opcode = get_word (regs.pc); + if (opcode == 0x4e72 /* RTE */ + || opcode == 0x4e74 /* RTD */ + || opcode == 0x4e75 /* RTS */ + || opcode == 0x4e77 /* RTR */ + || opcode == 0x4e76 /* TRAPV */ + || (opcode & 0xffc0) == 0x4e80 /* JSR */ + || (opcode & 0xffc0) == 0x4ec0 /* JMP */ + || (opcode & 0xff00) == 0x6100 /* BSR */ + || ((opcode & 0xf000) == 0x6000 /* Bcc */ + && cctrue((opcode >> 8) & 0xf)) + || ((opcode & 0xf0f0) == 0x5050 /* DBcc */ + && !cctrue((opcode >> 8) & 0xf) + && (uae_s16)m68k_dreg(regs, opcode & 7) != 0)) + { + last_trace_ad = m68k_getpc (); + unset_special (SPCFLAG_TRACE); + set_special (SPCFLAG_DOTRACE); + } + } else if (regs.t1) { + last_trace_ad = m68k_getpc (); + unset_special (SPCFLAG_TRACE); + set_special (SPCFLAG_DOTRACE); + } +} + +static int do_specialties (int cycles) +{ + if (regs.spcflags & SPCFLAG_COPPER) + do_copper (); + + /*n_spcinsns++;*/ + while ((regs.spcflags & SPCFLAG_BLTNASTY) && cycles > 0) { + int c = blitnasty(); + if (!c) { + cycles -= 2 * CYCLE_UNIT; + if (cycles < CYCLE_UNIT) + cycles = 0; + c = 1; + } + do_cycles (c * CYCLE_UNIT); + if (regs.spcflags & SPCFLAG_COPPER) + do_copper (); + } + + if (regs.spcflags & SPCFLAG_DOTRACE) + Exception (9,last_trace_ad); + + while (regs.spcflags & SPCFLAG_STOP) { + do_cycles (4 * CYCLE_UNIT); + if (regs.spcflags & SPCFLAG_COPPER) + do_copper (); + if (regs.spcflags & (SPCFLAG_INT | SPCFLAG_DOINT)) { + int intr = intlev (); + unset_special (SPCFLAG_INT | SPCFLAG_DOINT); + if (intr != -1 && intr > regs.intmask) { + Interrupt (intr); + regs.stopped = 0; + unset_special (SPCFLAG_STOP); } - } else if (regs.t1) { - last_trace_ad = m68k_getpc(); - regs.spcflags &= ~SPCFLAG_TRACE; - regs.spcflags |= SPCFLAG_DOTRACE; } } + if (regs.spcflags & SPCFLAG_TRACE) + do_trace (); + + if (regs.spcflags & SPCFLAG_DOINT) { + int intr = intlev (); + unset_special (SPCFLAG_DOINT); + if (intr != -1 && intr > regs.intmask) { + Interrupt (intr); + regs.stopped = 0; + } + } + if (regs.spcflags & SPCFLAG_INT) { + unset_special (SPCFLAG_INT); + set_special (SPCFLAG_DOINT); + } + if (regs.spcflags & (SPCFLAG_BRK | SPCFLAG_MODE_CHANGE)) { + unset_special (SPCFLAG_BRK | SPCFLAG_MODE_CHANGE); + return 1; + } + return 0; } -static void m68k_run_1(void) +/* It's really sad to have two almost identical functions for this, but we + do it all for performance... :( */ +static void m68k_run_1 (void) { - regs.spcflags &= ~(SPCFLAG_EMULTRAP); - for(;;) { + for (;;) { + int cycles; + uae_u32 opcode = regs.ir; /* assert (!regs.stopped && !(regs.spcflags & SPCFLAG_STOP)); */ /* regs_backup[backup_pointer = (backup_pointer + 1) % 16] = regs;*/ -#if COUNT_INSTRS +#if COUNT_INSTRS == 2 + if (table68k[opcode].handler != -1) + instrcount[table68k[opcode].handler]++; +#elif COUNT_INSTRS == 1 instrcount[opcode]++; #endif -#if defined(X86_ASSEMBLY) - { - ULONG opcode = nextiword(); - __asm__ __volatile__("\tcall *%%ebx" - : : "b" (cpufunctbl[opcode]), "a" (opcode) - : "%eax", "%ebx", "%edx", "%ecx", - "%esi", "%edi", "%ebp", "memory", "cc"); - } -#else - { - ULONG opcode = nextiword(); - (*cpufunctbl[opcode])(opcode); - } -#endif -#ifndef NO_EXCEPTION_3 - if (buserr) { - Exception(3,0); - buserr = 0; - } -#endif - if (regs.spcflags & SPCFLAG_EMULTRAP) - return; + cycles = (*cpufunctbl[opcode])(opcode); /*n_insns++;*/ - do_cycles(); + cycles &= cycles_mask; + cycles |= cycles_val; + do_cycles (cycles); if (regs.spcflags) { - /*n_spcinsns++;*/ - while (regs.spcflags & SPCFLAG_BLTNASTY) { - do_cycles(); - if (regs.spcflags & SPCFLAG_DISK) - do_disk(); - } - run_compiled_code(); - if (regs.spcflags & SPCFLAG_DOTRACE) { - Exception(9,last_trace_ad); - } - while (regs.spcflags & SPCFLAG_STOP) { - do_cycles(); - if (regs.spcflags & SPCFLAG_DISK) - do_disk(); - if (regs.spcflags & (SPCFLAG_INT | SPCFLAG_DOINT | SPCFLAG_TIMER)){ - int intr = intlev(); - regs.spcflags &= ~(SPCFLAG_INT | SPCFLAG_DOINT); - if (intr != -1 && intr > regs.intmask) { - Interrupt(intr); - regs.stopped = 0; - regs.spcflags &= ~SPCFLAG_STOP; - } - } - } - do_trace(); -#ifdef WANT_SLOW_MULTIPLY - /* Kludge for Hardwired demo. The guys who wrote it should be - * mutilated. */ - if (regs.spcflags & SPCFLAG_EXTRA_CYCLES) { - do_cycles (); do_cycles (); do_cycles (); do_cycles (); - regs.spcflags &= ~SPCFLAG_EXTRA_CYCLES; - } -#endif - if (regs.spcflags & SPCFLAG_DISK) - do_disk(); - - if (regs.spcflags & (SPCFLAG_DOINT|SPCFLAG_TIMER)) { - int intr = intlev(); - regs.spcflags &= ~SPCFLAG_DOINT; - if (intr != -1 && intr > regs.intmask) { - Interrupt(intr); - regs.stopped = 0; - } - } - if (regs.spcflags & SPCFLAG_INT) { - regs.spcflags &= ~SPCFLAG_INT; - regs.spcflags |= SPCFLAG_DOINT; - } - if (regs.spcflags & (SPCFLAG_BRK|SPCFLAG_MODE_CHANGE)) { - regs.spcflags &= ~(SPCFLAG_BRK|SPCFLAG_MODE_CHANGE); + if (do_specialties (cycles)) return; - } } } } -#if USER_PROGRAMS_BEHAVE > 0 -static void m68k_run_2(void) +#define DEBUG_PREFETCH + +/* Same thing, but don't use prefetch to get opcode. */ +static void m68k_run_2 (void) { - regs.spcflags &= ~(SPCFLAG_EMULTRAP); - for(;;) { + for (;;) { + int cycles; + uae_u32 opcode = get_iword (0); /* assert (!regs.stopped && !(regs.spcflags & SPCFLAG_STOP)); */ /* regs_backup[backup_pointer = (backup_pointer + 1) % 16] = regs;*/ -#if COUNT_INSTRS +#if COUNT_INSTRS == 2 + if (table68k[opcode].handler != -1) + instrcount[table68k[opcode].handler]++; +#elif COUNT_INSTRS == 1 instrcount[opcode]++; #endif -#if defined(X86_ASSEMBLY) - { - ULONG opcode = nextiword(); - __asm__ __volatile__("\tcall *%%ebx" - : : "b" (cpufunctbl_behaved[opcode]), "a" (opcode) - : "%eax", "%ebx", "%edx", "%ecx", - "%esi", "%edi", "%ebp", "memory", "cc"); - } -#else - { - ULONG opcode = nextiword(); - (*cpufunctbl_behaved[opcode])(opcode); - } -#endif -#ifndef NO_EXCEPTION_3 - if (buserr) { - Exception(3,0); - buserr = 0; - } -#endif - if (regs.spcflags & SPCFLAG_EMULTRAP) - return; + cycles = (*cpufunctbl[opcode])(opcode); + /*n_insns++;*/ - do_cycles(); + cycles &= cycles_mask; + cycles |= cycles_val; + do_cycles (cycles); if (regs.spcflags) { - /*n_spcinsns++;*/ - while (regs.spcflags & SPCFLAG_BLTNASTY) { - do_cycles(); - if (regs.spcflags & SPCFLAG_DISK) - do_disk(); - } - run_compiled_code(); - if (regs.spcflags & SPCFLAG_DOTRACE) { - Exception(9,last_trace_ad); - } - while (regs.spcflags & SPCFLAG_STOP) { - do_cycles(); - if (regs.spcflags & SPCFLAG_DISK) - do_disk(); - if (regs.spcflags & (SPCFLAG_INT | SPCFLAG_DOINT | SPCFLAG_TIMER)){ - int intr = intlev(); - regs.spcflags &= ~(SPCFLAG_INT | SPCFLAG_DOINT); - if (intr != -1 && intr > regs.intmask) { - Interrupt(intr); - regs.stopped = 0; - regs.spcflags &= ~SPCFLAG_STOP; - } - } - } - do_trace(); -#ifdef WANT_SLOW_MULTIPLY - /* Kludge for Hardwired demo. The guys who wrote it should be - * mutilated. */ - if (regs.spcflags & SPCFLAG_EXTRA_CYCLES) { - do_cycles (); do_cycles (); do_cycles (); do_cycles (); - regs.spcflags &= ~SPCFLAG_EXTRA_CYCLES; - } -#endif - if (regs.spcflags & SPCFLAG_DISK) - do_disk(); - - if (regs.spcflags & (SPCFLAG_DOINT|SPCFLAG_TIMER)) { - int intr = intlev(); - regs.spcflags &= ~SPCFLAG_DOINT; - if (intr != -1 && intr > regs.intmask) { - Interrupt(intr); - regs.stopped = 0; - } - } - if (regs.spcflags & SPCFLAG_INT) { - regs.spcflags &= ~SPCFLAG_INT; - regs.spcflags |= SPCFLAG_DOINT; - } - if (regs.spcflags & (SPCFLAG_BRK|SPCFLAG_MODE_CHANGE)) { - regs.spcflags &= ~(SPCFLAG_BRK|SPCFLAG_MODE_CHANGE); + if (do_specialties (cycles)) return; - } } } } -#endif -#ifdef X86_ASSEMBLY -static __inline__ void m68k_run1(void) +#define m68k_run1(F) (F) () + +int in_m68k_go = 0; + +static void exception2_handle (uaecptr addr, uaecptr fault) { - /* Work around compiler bug: GCC doesn't push %ebp in m68k_run_1. */ - __asm__ __volatile__ ("pushl %%ebp\n\tcall *%%eax\n\tpopl %%ebp" : : "a" (m68k_run_1) : "%eax", "%edx", "%ecx", "memory", "cc"); + last_addr_for_exception_3 = addr; + last_fault_for_exception_3 = fault; + last_writeaccess_for_exception_3 = 0; + last_instructionaccess_for_exception_3 = 0; + Exception (2, addr); } -#if USER_PROGRAMS_BEHAVE > 0 -static __inline__ void m68k_run2(void) + +void m68k_go (int may_quit) { - /* Work around compiler bug: GCC doesn't push %ebp in m68k_run_1. */ - __asm__ __volatile__ ("pushl %%ebp\n\tcall *%%eax\n\tpopl %%ebp" : : "a" (m68k_run_2) : "%eax", "%edx", "%ecx", "memory", "cc"); -} -#endif -#else -#define m68k_run1 m68k_run_1 -#define m68k_run2 m68k_run_2 + if (in_m68k_go || !may_quit) { + write_log ("Bug! m68k_go is not reentrant.\n"); + abort (); + } + + reset_frame_rate_hack (); + update_68k_cycles (); + + in_m68k_go++; + for (;;) { + if (quit_program > 0) { + if (quit_program == 1) + break; + quit_program = 0; + if (savestate_state == STATE_RESTORE) { + restore_state (savestate_filename); +#if 0 + activate_debugger (); #endif + } + m68k_reset (); + reset_all_systems (); + customreset (); + /* We may have been restoring state, but we're done now. */ + savestate_restore_finish (); + fill_prefetch_slow (); + handle_active_events (); + if (regs.spcflags) + do_specialties (0); + m68k_setpc (regs.pc); + } -int may_run_compiled; + if (debugging) + debug (); + if (regs.panic) { + regs.panic = 0; + /* program jumped to non-existing memory and cpu was >= 68020 */ + get_real_address (regs.isp); /* stack in no one's land? -> reboot */ + if (regs.isp & 1) + regs.panic = 1; + if (!regs.panic) + exception2_handle (regs.panic_pc, regs.panic_addr); + if (regs.panic) { + /* system is very badly confused */ + write_log ("double bus error or corrupted stack, forcing reboot..\n"); + regs.panic = 0; + uae_reset (); + } + } + m68k_run1 (currprefs.cpu_compatible ? m68k_run_1 : m68k_run_2); + } + in_m68k_go--; +} -void m68k_go(int may_quit) +static void m68k_verify (uaecptr addr, uaecptr *nextpc) { - int old_mrc = may_run_compiled; - - may_run_compiled = may_quit; - for(;;) { - if (may_quit && quit_program) + uae_u32 opcode, val; + struct instr *dp; + + opcode = get_iword_1(0); + last_op_for_exception_3 = opcode; + m68kpc_offset = 2; + + if (cpufunctbl[opcode] == op_illg_1) { + opcode = 0x4AFC; + } + dp = table68k + opcode; + + if (dp->suse) { + if (!verify_ea (dp->sreg, dp->smode, dp->size, &val)) { + Exception (3, 0); + return; + } + } + if (dp->duse) { + if (!verify_ea (dp->dreg, dp->dmode, dp->size, &val)) { + Exception (3, 0); return; - if (debugging) - debug(); -#if USER_PROGRAMS_BEHAVE > 0 - if ((regs.kick_mask & 0xF00000) != 0xF00000) - m68k_run2(); - else -#endif - m68k_run1(); - - /* - * We make sure in the above functions that this is never - * set together with SPCFLAG_INT and similar flags - */ - if (regs.spcflags & SPCFLAG_EMULTRAP) { - regs.spcflags &= ~SPCFLAG_EMULTRAP; - if (lasttrap == 0) - break; - do_emultrap(lasttrap); } } - may_run_compiled = old_mrc; } -void m68k_disasm(CPTR addr, CPTR *nextpc, int cnt) +void m68k_disasm (FILE *f, uaecptr addr, uaecptr *nextpc, int cnt) { - CPTR pc = m68k_getpc(); - CPTR newpc = 0; - m68k_setpc(addr); - for (;cnt--;){ + uaecptr newpc = 0; + m68kpc_offset = addr - m68k_getpc (); + while (cnt-- > 0) { char instrname[20],*ccpt; int opwords; - ULONG opcode; + uae_u32 opcode; struct mnemolookup *lookup; struct instr *dp; - printf("%08lx: ", m68k_getpc()); - for(opwords = 0; opwords < 5; opwords++){ - printf("%04x ", get_word(m68k_getpc() + opwords*2)); - } - - opcode = nextiword(); - if (cpufunctbl[opcode] == op_illg) { + fprintf (f, "%08lx: ", m68k_getpc () + m68kpc_offset); + for (opwords = 0; opwords < 5; opwords++){ + fprintf (f, "%04x ", get_iword_1 (m68kpc_offset + opwords*2)); + } + opcode = get_iword_1 (m68kpc_offset); + m68kpc_offset += 2; + if (cpufunctbl[opcode] == op_illg_1) { opcode = 0x4AFC; } dp = table68k + opcode; for (lookup = lookuptab;lookup->mnemo != dp->mnemo; lookup++) ; - - strcpy(instrname,lookup->name); - ccpt = strstr(instrname,"cc"); + + strcpy (instrname, lookup->name); + ccpt = strstr (instrname, "cc"); if (ccpt != 0) { - strncpy(ccpt,ccnames[dp->cc],2); + strncpy (ccpt, ccnames[dp->cc], 2); } - printf("%s", instrname); - switch(dp->size){ - case sz_byte: printf(".B "); break; - case sz_word: printf(".W "); break; - case sz_long: printf(".L "); break; - default: printf(" ");break; + fprintf (f, "%s", instrname); + switch (dp->size){ + case sz_byte: fprintf (f, ".B "); break; + case sz_word: fprintf (f, ".W "); break; + case sz_long: fprintf (f, ".L "); break; + default: fprintf (f, " "); break; } if (dp->suse) { - newpc = m68k_getpc() + ShowEA(dp->sreg, dp->smode, dp->size, 0); + newpc = m68k_getpc () + m68kpc_offset; + newpc += ShowEA (f, dp->sreg, dp->smode, dp->size, 0); } if (dp->suse && dp->duse) - printf(","); + fprintf (f, ","); if (dp->duse) { - newpc = m68k_getpc() + ShowEA(dp->dreg, dp->dmode, dp->size, 0); + newpc = m68k_getpc () + m68kpc_offset; + newpc += ShowEA (f, dp->dreg, dp->dmode, dp->size, 0); } if (ccpt != 0) { if (cctrue(dp->cc)) - printf(" == %08lx (TRUE)",newpc); - else - printf(" == %08lx (FALSE)",newpc); + fprintf (f, " == %08lx (TRUE)", newpc); + else + fprintf (f, " == %08lx (FALSE)", newpc); } else if ((opcode & 0xff00) == 0x6100) /* BSR */ - printf(" == %08lx",newpc); - printf("\n"); + fprintf (f, " == %08lx", newpc); + fprintf (f, "\n"); } - if (nextpc) *nextpc = m68k_getpc(); - m68k_setpc(pc); + if (nextpc) + *nextpc = m68k_getpc () + m68kpc_offset; } -void m68k_dumpstate(CPTR *nextpc) +void m68k_dumpstate (FILE *f, uaecptr *nextpc) { int i; - for(i = 0; i < 8; i++){ - printf("D%d: %08lx ", i, m68k_dreg(regs, i)); - if ((i & 3) == 3) printf("\n"); - } - for(i = 0; i < 8; i++){ - printf("A%d: %08lx ", i, m68k_areg(regs, i)); - if ((i & 3) == 3) printf("\n"); + for (i = 0; i < 8; i++){ + fprintf (f, "D%d: %08lx ", i, m68k_dreg(regs, i)); + if ((i & 3) == 3) fprintf (f, "\n"); + } + for (i = 0; i < 8; i++){ + fprintf (f, "A%d: %08lx ", i, m68k_areg(regs, i)); + if ((i & 3) == 3) fprintf (f, "\n"); } if (regs.s == 0) regs.usp = m68k_areg(regs, 7); if (regs.s && regs.m) regs.msp = m68k_areg(regs, 7); if (regs.s && regs.m == 0) regs.isp = m68k_areg(regs, 7); - printf("USP=%08lx ISP=%08lx MSP=%08lx VBR=%08lx\n", - regs.usp,regs.isp,regs.msp,regs.vbr); - printf ("T=%d%d S=%d M=%d X=%d N=%d Z=%d V=%d C=%d IMASK=%d\n", - regs.t1, regs.t0, regs.s, regs.m, - XFLG, NFLG, ZFLG, VFLG, CFLG, regs.intmask); - for(i = 0; i < 8; i++){ - printf("FP%d: %g ", i, regs.fp[i]); - if ((i & 3) == 3) printf("\n"); - } - printf("N=%d Z=%d I=%d NAN=%d\n", - (regs.fpsr & 0x8000000) != 0, - (regs.fpsr & 0x4000000) != 0, - (regs.fpsr & 0x2000000) != 0, - (regs.fpsr & 0x1000000) != 0); - m68k_disasm(m68k_getpc(), nextpc, 1); - if (nextpc) printf("next PC: %08lx\n", *nextpc); + fprintf (f, "USP=%08lx ISP=%08lx MSP=%08lx VBR=%08lx\n", + regs.usp,regs.isp,regs.msp,regs.vbr); + fprintf (f, "T=%d%d S=%d M=%d X=%d N=%d Z=%d V=%d C=%d IMASK=%d\n", + regs.t1, regs.t0, regs.s, regs.m, + GET_XFLG, GET_NFLG, GET_ZFLG, GET_VFLG, GET_CFLG, regs.intmask); + for (i = 0; i < 8; i++){ + fprintf (f, "FP%d: %g ", i, regs.fp[i]); + if ((i & 3) == 3) fprintf (f, "\n"); + } + fprintf (f, "N=%d Z=%d I=%d NAN=%d\n", + (regs.fpsr & 0x8000000) != 0, + (regs.fpsr & 0x4000000) != 0, + (regs.fpsr & 0x2000000) != 0, + (regs.fpsr & 0x1000000) != 0); + + m68k_disasm (f, m68k_getpc (), nextpc, 1); + if (nextpc) + fprintf (f, "next PC: %08lx\n", *nextpc); +} + + +/* CPU save/restore code */ + +#define CPUTYPE_EC 1 +#define CPUMODE_HALT 1 + +uae_u8 *restore_cpu (uae_u8 *src) +{ + int i,model,flags; + uae_u32 l; + + model = restore_u32(); + switch (model) { + case 68000: + currprefs.cpu_level = 0; + break; + case 68010: + currprefs.cpu_level = 1; + break; + case 68020: + currprefs.cpu_level = 2; + break; + default: + write_log ("Unknown cpu type %d\n", model); + break; + } + + flags = restore_u32(); + currprefs.address_space_24 = 0; + if (flags & CPUTYPE_EC) + currprefs.address_space_24 = 1; + for (i = 0; i < 15; i++) + regs.regs[i] = restore_u32 (); + regs.pc = restore_u32 (); + regs.irc = restore_u16 (); + regs.ir = restore_u16 (); + regs.usp = restore_u32 (); + regs.isp = restore_u32 (); + regs.sr = restore_u16 (); + l = restore_u32(); + if (l & CPUMODE_HALT) { + regs.stopped = 1; + set_special (SPCFLAG_STOP); + } else + regs.stopped = 0; + if (model >= 68010) { + regs.dfc = restore_u32 (); + regs.sfc = restore_u32 (); + regs.vbr = restore_u32 (); + } + if (model >= 68020) { + caar = restore_u32 (); + cacr = restore_u32 (); + regs.msp = restore_u32 (); + } + write_log ("CPU %d%s%03d, PC=%08.8X\n", + model/1000, flags & 1 ? "EC" : "", model % 1000, regs.pc); + + return src; +} + +static int cpumodel[] = { 68000, 68010, 68020, 68020 }; + +uae_u8 *save_cpu (int *len) +{ + uae_u8 *dstbak,*dst; + int model,i; + + dstbak = dst = malloc(4+4+15*4+4+4+4+4+2+4+4+4+4+4+4+4); + model = cpumodel[currprefs.cpu_level]; + save_u32 (model); /* MODEL */ + save_u32 (currprefs.address_space_24 ? 1 : 0); /* FLAGS */ + for(i = 0;i < 15; i++) save_u32 (regs.regs[i]); /* D0-D7 A0-A6 */ + save_u32 (m68k_getpc ()); /* PC */ + save_u16 (regs.irc); /* prefetch */ + save_u16 (regs.ir); /* instruction prefetch */ + MakeSR (); + save_u32 (!regs.s ? regs.regs[15] : regs.usp); /* USP */ + save_u32 (regs.s ? regs.regs[15] : regs.isp); /* ISP */ + save_u16 (regs.sr); /* SR/CCR */ + save_u32 (regs.stopped ? CPUMODE_HALT : 0); /* flags */ + if(model >= 68010) { + save_u32 (regs.dfc); /* DFC */ + save_u32 (regs.sfc); /* SFC */ + save_u32 (regs.vbr); /* VBR */ + } + if(model >= 68020) { + save_u32 (caar); /* CAAR */ + save_u32 (cacr); /* CACR */ + save_u32 (regs.msp); /* MSP */ + } + *len = dst - dstbak; + return dstbak; +} + +static void exception3f (uae_u32 opcode, uaecptr addr, uaecptr fault, int writeaccess, int instructionaccess) +{ + last_addr_for_exception_3 = addr; + last_fault_for_exception_3 = fault; + last_op_for_exception_3 = opcode; + last_writeaccess_for_exception_3 = writeaccess; + last_instructionaccess_for_exception_3 = instructionaccess; + Exception (3, fault); +} + +void exception3 (uae_u32 opcode, uaecptr addr, uaecptr fault) +{ + exception3f (opcode, addr, fault, 0, 0); +} + +void exception3i (uae_u32 opcode, uaecptr addr, uaecptr fault) +{ + exception3f (opcode, addr, fault, 0, 1); +} + +void exception2 (uaecptr addr, uaecptr fault) +{ + write_log ("delayed exception2!\n"); + regs.panic_pc = m68k_getpc(); + regs.panic_addr = addr; + regs.panic = 2; + set_special (SPCFLAG_BRK); + m68k_setpc (0xf80000); + fill_prefetch_slow (); +} + +void cpureset (void) +{ + customreset (); +#if 0 + uae_u16 ins; + if (currprefs.cpu_level == 0 && (currprefs.cpu_compatible || currprefs.cpu_cycle_exact)) { + customreset (); + return; + } + ins = get_word (m68k_getpc() + 2); + if ((ins & ~7) == 0x4ed0) { + int reg = ins & 7; + uae_u32 addr = m68k_areg (regs, reg); + write_log ("reset/jmp (ax) combination emulated\n"); + customreset (); + if (addr < 0x80000) + addr += 0xf80000; + m68k_setpc (addr); + } +#endif }