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root/cebix/BasiliskII/src/uae_cpu/gencpu.c
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Comparing BasiliskII/src/uae_cpu/gencpu.c (file contents):
Revision 1.15 by gbeauche, 2001-08-19T16:21:01Z vs.
Revision 1.21 by gbeauche, 2005-03-17T00:21:36Z

# Line 725 | Line 725 | static void genflags (flagtypes type, wo
725          start_brace ();
726          printf ("\tuae_u32 %s;\n", value);
727          break;
728 –
728       default:
729          break;
730      }
# Line 746 | Line 745 | static void genflags (flagtypes type, wo
745          }
746          printf ("\t}\n");
747          return;
748 +        
749       case flag_logical:
750          if (strcmp (value, "0") == 0) {
751              printf ("\tSET_CZNV (FLAGVAL_Z);\n");
# Line 786 | Line 786 | static void genflags (flagtypes type, wo
786          break;
787      }
788   #endif
789 –
789      genflags_normal (type, size, value, src, dst);
790   }
791  
# Line 957 | Line 956 | static void gen_opcode (unsigned long in
956          printf ("\tuae_u16 newv_hi = (src & 0xF0) + (dst & 0xF0);\n");
957          printf ("\tuae_u16 newv, tmp_newv;\n");
958          printf ("\tint cflg;\n");
959 <        printf ("\tnewv = tmp_newv = newv_hi + newv_lo;");
959 >        printf ("\tnewv = tmp_newv = newv_hi + newv_lo;\n");
960          printf ("\tif (newv_lo > 9) { newv += 6; }\n");
961          printf ("\tcflg = (newv & 0x3F0) > 0x90;\n");
962          printf ("\tif (cflg) newv += 0x60;\n");
# Line 989 | Line 988 | static void gen_opcode (unsigned long in
988          printf ("\tuae_u16 newv;\n");
989          printf ("\tint cflg;\n");
990          printf ("\tif (newv_lo > 9) { newv_lo -= 6; }\n");
991 <        printf ("\tnewv = newv_hi + newv_lo;");
991 >        printf ("\tnewv = newv_hi + newv_lo;\n");
992          printf ("\tcflg = (newv & 0x1F0) > 0x90;\n");
993          printf ("\tif (cflg) newv -= 0x60;\n");
994          printf ("\tSET_CFLG (cflg);\n");
# Line 1201 | Line 1200 | static void gen_opcode (unsigned long in
1200              printf ("\tif ((format & 0xF000) == 0x0000) { break; }\n");
1201              printf ("\telse if ((format & 0xF000) == 0x1000) { ; }\n");
1202              printf ("\telse if ((format & 0xF000) == 0x2000) { m68k_areg(regs, 7) += 4; break; }\n");
1203 +            /* gb-- the next two lines are deleted in Bernie's gencpu.c */
1204              printf ("\telse if ((format & 0xF000) == 0x3000) { m68k_areg(regs, 7) += 4; break; }\n");
1205              printf ("\telse if ((format & 0xF000) == 0x7000) { m68k_areg(regs, 7) += 52; break; }\n");
1206              printf ("\telse if ((format & 0xF000) == 0x8000) { m68k_areg(regs, 7) += 50; break; }\n");
# Line 1289 | Line 1289 | static void gen_opcode (unsigned long in
1289          m68k_pc_offset = 0;
1290          break;
1291       case i_Bcc:
1292 +        if (0 && !using_prefetch && !using_exception_3 && (cpu_level >= 2)) {
1293 +        /* gb-- variant probably more favorable to compiler optimizations
1294 +                    also assumes no prefetch buffer is used
1295 +        Hmm, that would make sense with processors capable of conditional moves */
1296 +        if (curi->size == sz_long && next_cpu_level < 1)
1297 +                next_cpu_level = 1;
1298 +        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1299 +        printf ("\tm68k_incpc (cctrue(%d) ? ((uae_s32)src + 2) : %d);\n", curi->cc, m68k_pc_offset);
1300 +        m68k_pc_offset = 0;
1301 +        }
1302 +        else {
1303 +        /* original code for branch instructions */
1304          if (curi->size == sz_long) {
1305              if (cpu_level < 2) {
1306                  printf ("\tm68k_incpc(2);\n");
# Line 1312 | Line 1324 | static void gen_opcode (unsigned long in
1324              printf ("\t}\n");
1325              need_endlabel = 1;
1326          }
1315 – #ifdef USE_COMPILER
1316 –        printf ("\tm68k_setpc_bcc(m68k_getpc() + 2 + (uae_s32)src);\n");
1317 – #else
1327          printf ("\tm68k_incpc ((uae_s32)src + 2);\n");
1319 – #endif
1328          fill_prefetch_0 ();
1329 <        printf ("\tgoto %s;\n", endlabelstr);
1329 >        printf ("return;\n");
1330          printf ("didnt_jump:;\n");
1331          need_endlabel = 1;
1332 +        }
1333          break;
1334       case i_LEA:
1335          genamode (curi->smode, "srcreg", curi->size, "src", 0, 0);
# Line 1348 | Line 1357 | static void gen_opcode (unsigned long in
1357              printf ("\t\t}\n");
1358              need_endlabel = 1;
1359          }
1351 – #ifdef USE_COMPILER
1352 –        printf ("\t\t\tm68k_setpc_bcc(m68k_getpc() + (uae_s32)offs + 2);\n");
1353 – #else
1360          printf ("\t\t\tm68k_incpc((uae_s32)offs + 2);\n");
1355 – #endif
1361          fill_prefetch_0 ();
1362 <        printf ("\t\tgoto %s;\n", endlabelstr);
1362 >        printf ("return;\n");
1363          printf ("\t\t}\n");
1364          printf ("\t}\n");
1365          need_endlabel = 1;
# Line 1452 | Line 1457 | static void gen_opcode (unsigned long in
1457              abort ();
1458          }
1459          printf ("\tSET_ZFLG (upper == reg || lower == reg);\n");
1460 <        printf ("\tSET_CFLG (lower <= upper ? reg < lower || reg > upper : reg > upper || reg < lower);\n");
1460 >        printf ("\tSET_CFLG_ALWAYS (lower <= upper ? reg < lower || reg > upper : reg > upper || reg < lower);\n");
1461          printf ("\tif ((extra & 0x800) && GET_CFLG) { Exception(6,oldpc); goto %s; }\n}\n", endlabelstr);
1462          need_endlabel = 1;
1463          break;
# Line 1989 | Line 1994 | static void gen_opcode (unsigned long in
1994              printf ("\ttmp = (bf0 << (offset & 7)) | (bf1 >> (8 - (offset & 7)));\n");
1995          }
1996          printf ("\ttmp >>= (32 - width);\n");
1997 <        printf ("\tSET_NFLG (tmp & (1 << (width-1)) ? 1 : 0);\n");
1997 >        printf ("\tSET_NFLG_ALWAYS (tmp & (1 << (width-1)) ? 1 : 0);\n");
1998          printf ("\tSET_ZFLG (tmp == 0); SET_VFLG (0); SET_CFLG (0);\n");
1999          switch (curi->mnemo) {
2000           case i_BFTST:
# Line 2017 | Line 2022 | static void gen_opcode (unsigned long in
2022              break;
2023           case i_BFINS:
2024              printf ("\ttmp = m68k_dreg(regs, (extra >> 12) & 7);\n");
2025 +            printf ("\tSET_NFLG_ALWAYS (tmp & (1 << (width - 1)) ? 1 : 0);\n");
2026 +            printf ("\tSET_ZFLG (tmp == 0);\n");
2027              break;
2028           default:
2029              break;
# Line 2087 | Line 2094 | static void gen_opcode (unsigned long in
2094          genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0);
2095          sync_m68k_pc ();
2096          swap_opcode ();
2097 <        printf ("\tfpp_opp(opcode,extra);\n");
2097 >        printf ("\tfpuop_arithmetic(opcode, extra);\n");
2098          break;
2099       case i_FDBcc:
2100          genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0);
2101          sync_m68k_pc ();
2102          swap_opcode ();
2103 <        printf ("\tfdbcc_opp(opcode,extra);\n");
2103 >        printf ("\tfpuop_dbcc(opcode, extra);\n");
2104          break;
2105       case i_FScc:
2106          genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0);
2107          sync_m68k_pc ();
2108          swap_opcode ();
2109 <        printf ("\tfscc_opp(opcode,extra);\n");
2109 >        printf ("\tfpuop_scc(opcode,extra);\n");
2110          break;
2111       case i_FTRAPcc:
2112          sync_m68k_pc ();
# Line 2109 | Line 2116 | static void gen_opcode (unsigned long in
2116              genamode (curi->smode, "srcreg", curi->size, "dummy", 1, 0);
2117          sync_m68k_pc ();
2118          swap_opcode ();
2119 <        printf ("\tftrapcc_opp(opcode,oldpc);\n");
2119 >        printf ("\tfpuop_trapcc(opcode,oldpc);\n");
2120          break;
2121       case i_FBcc:
2122          sync_m68k_pc ();
# Line 2118 | Line 2125 | static void gen_opcode (unsigned long in
2125          genamode (curi->dmode, "srcreg", curi->size, "extra", 1, 0);
2126          sync_m68k_pc ();
2127          swap_opcode ();
2128 <        printf ("\tfbcc_opp(opcode,pc,extra);\n");
2128 >        printf ("\tfpuop_bcc(opcode,pc,extra);\n");
2129          break;
2130       case i_FSAVE:
2131          sync_m68k_pc ();
2132          swap_opcode ();
2133 <        printf ("\tfsave_opp(opcode);\n");
2133 >        printf ("\tfpuop_save(opcode);\n");
2134          break;
2135       case i_FRESTORE:
2136          sync_m68k_pc ();
2137          swap_opcode ();
2138 <        printf ("\tfrestore_opp(opcode);\n");
2138 >        printf ("\tfpuop_restore(opcode);\n");
2139          break;
2140       case i_CINVL:
2141       case i_CINVP:
2142       case i_CINVA:
2143 +        /* gb-- srcreg now contains the cache field */
2144 +        printf ("\tif (srcreg&0x2)\n");
2145 +        printf ("\t\tflush_icache(%d);\n", 30 + ((opcode >> 3) & 3));
2146 +        break;
2147       case i_CPUSHL:
2148       case i_CPUSHP:
2149       case i_CPUSHA:
2150 +        /* gb-- srcreg now contains the cache field */
2151 +        printf ("\tif (srcreg&0x2)\n");
2152 +        printf ("\t\tflush_icache(%d);\n", 40 + ((opcode >> 3) & 3));
2153          break;
2154       case i_MOVE16:
2155          if ((opcode & 0xfff8) == 0xf620) {
# Line 2173 | Line 2187 | static void gen_opcode (unsigned long in
2187          swap_opcode ();
2188          printf ("\tmmu_op(opcode,extra);\n");
2189          break;
2190 +        
2191 +        case i_EMULOP_RETURN:
2192 +        printf ("\tm68k_emulop_return();\n");
2193 +        m68k_pc_offset = 0;
2194 +        break;
2195 +        
2196 +        case i_EMULOP:
2197 +        printf ("\n");
2198 +        swap_opcode ();
2199 +        printf ("\tm68k_emulop(opcode);\n");
2200 +        break;
2201 +        
2202       default:
2203          abort ();
2204          break;
# Line 2184 | Line 2210 | static void gen_opcode (unsigned long in
2210   static void generate_includes (FILE * f)
2211   {
2212      fprintf (f, "#include \"sysdeps.h\"\n");
2213 +        
2214      fprintf (f, "#include \"m68k.h\"\n");
2215      fprintf (f, "#include \"memory.h\"\n");
2216      fprintf (f, "#include \"readcpu.h\"\n");
2217      fprintf (f, "#include \"newcpu.h\"\n");
2218 +    fprintf (f, "#include \"compiler/compemu.h\"\n");
2219 +    fprintf (f, "#include \"fpu/fpu.h\"\n");
2220      fprintf (f, "#include \"cputbl.h\"\n");
2221 +        
2222 +        fprintf (f, "#define SET_CFLG_ALWAYS(x) SET_CFLG(x)\n");
2223 +        fprintf (f, "#define SET_NFLG_ALWAYS(x) SET_NFLG(x)\n");
2224 +        fprintf (f, "#define CPUFUNC_FF(x) x##_ff\n");
2225 +        fprintf (f, "#define CPUFUNC_NF(x) x##_nf\n");
2226 +        fprintf (f, "#define CPUFUNC(x) CPUFUNC_FF(x)\n");
2227 +        
2228 +        fprintf (f, "#ifdef NOFLAGS\n");
2229 +        fprintf (f, "# include \"noflags.h\"\n");
2230 +        fprintf (f, "#endif\n");
2231   }
2232  
2233   static int postfix;
# Line 2212 | Line 2251 | static void generate_one_opcode (int rp)
2251          return;
2252  
2253      if (opcode_next_clev[rp] != cpu_level) {
2254 <        fprintf (stblfile, "{ op_%lx_%d, 0, %ld }, /* %s */\n", opcode, opcode_last_postfix[rp],
2254 >        fprintf (stblfile, "{ CPUFUNC(op_%lx_%d), 0, %ld }, /* %s */\n", opcode, opcode_last_postfix[rp],
2255                   opcode, lookuptab[i].name);
2256          return;
2257      }
2258 <    fprintf (stblfile, "{ op_%lx_%d, 0, %ld }, /* %s */\n", opcode, postfix, opcode, lookuptab[i].name);
2259 <    fprintf (headerfile, "extern cpuop_func op_%lx_%d;\n", opcode, postfix);
2260 <    printf ("void REGPARAM2 op_%lx_%d(uae_u32 opcode) /* %s */\n{\n", opcode, postfix, lookuptab[i].name);
2258 >        
2259 >        if (table68k[opcode].flagdead == 0)
2260 >        /* force to the "ff" variant since the instruction doesn't set at all the condition codes */
2261 >    fprintf (stblfile, "{ CPUFUNC_FF(op_%lx_%d), 0, %ld }, /* %s */\n", opcode, postfix, opcode, lookuptab[i].name);
2262 >        else
2263 >    fprintf (stblfile, "{ CPUFUNC(op_%lx_%d), 0, %ld }, /* %s */\n", opcode, postfix, opcode, lookuptab[i].name);
2264 >
2265 >    fprintf (headerfile, "extern cpuop_func op_%lx_%d_nf;\n", opcode, postfix);
2266 >    fprintf (headerfile, "extern cpuop_func op_%lx_%d_ff;\n", opcode, postfix);
2267 >    printf ("void REGPARAM2 CPUFUNC(op_%lx_%d)(uae_u32 opcode) /* %s */\n{\n", opcode, postfix, lookuptab[i].name);
2268 >        printf ("\tcpuop_begin();\n");
2269 >        
2270 >        /* gb-- The "nf" variant for an instruction that doesn't set the condition
2271 >           codes at all is the same as the "ff" variant, so we don't need the "nf"
2272 >           variant to be compiled since it is mapped to the "ff" variant in the
2273 >           smalltbl. */
2274 >        if (table68k[opcode].flagdead == 0)
2275 >        printf ("#ifndef NOFLAGS\n");
2276  
2277      switch (table68k[opcode].stype) {
2278       case 0: smsk = 7; break;
# Line 2227 | Line 2281 | static void generate_one_opcode (int rp)
2281       case 3: smsk = 7; break;
2282       case 4: smsk = 7; break;
2283       case 5: smsk = 63; break;
2284 +         case 6: smsk = 255; break;
2285           case 7: smsk = 3; break;
2286       default: abort ();
2287      }
# Line 2237 | Line 2292 | static void generate_one_opcode (int rp)
2292          && table68k[opcode].smode != imm && table68k[opcode].smode != imm0
2293          && table68k[opcode].smode != imm1 && table68k[opcode].smode != imm2
2294          && table68k[opcode].smode != absw && table68k[opcode].smode != absl
2295 <        && table68k[opcode].smode != PC8r && table68k[opcode].smode != PC16)
2295 >        && table68k[opcode].smode != PC8r && table68k[opcode].smode != PC16
2296 >        /* gb-- We don't want to fetch the EmulOp code since the EmulOp()
2297 >           routine uses the whole opcode value. Maybe all the EmulOps
2298 >           could be expanded out but I don't think it is an improvement */
2299 >        && table68k[opcode].stype != 6
2300 >        )
2301      {
2302          if (table68k[opcode].spos == -1) {
2303              if (((int) table68k[opcode].sreg) >= 128)
# Line 2333 | Line 2393 | static void generate_one_opcode (int rp)
2393      gen_opcode (opcode);
2394      if (need_endlabel)
2395          printf ("%s: ;\n", endlabelstr);
2396 +        if (table68k[opcode].flagdead == 0)
2397 +        printf ("\n#endif\n");
2398 +        printf ("\tcpuop_end();\n");
2399      printf ("}\n");
2400      opcode_next_clev[rp] = next_cpu_level;
2401      opcode_last_postfix[rp] = postfix;
# Line 2360 | Line 2423 | static void generate_func (void)
2423                  opcode_next_clev[rp] = 0;
2424          }
2425          postfix = i;
2426 <        fprintf (stblfile, "struct cputbl op_smalltbl_%d[] = {\n", postfix);
2426 >        fprintf (stblfile, "struct cputbl CPUFUNC(op_smalltbl_%d)[] = {\n", postfix);
2427  
2428          /* sam: this is for people with low memory (eg. me :)) */
2429          printf ("\n"
# Line 2407 | Line 2470 | int main (int argc, char **argv)
2470       * cputbl.h that way), but cpuopti can't cope.  That could be fixed, but
2471       * I don't dare to touch the 68k version.  */
2472  
2473 <    headerfile = fopen ("cputbl.h", "wb");
2474 <    stblfile = fopen ("cpustbl.cpp", "wb");
2475 <    freopen ("cpuemu.cpp", "wb", stdout);
2473 >    headerfile = fopen ("cputbl.h", "w");
2474 >    stblfile = fopen ("cpustbl.cpp", "w");
2475 >    FILE *out = freopen ("cpuemu.cpp", "w", stdout);
2476  
2477      generate_includes (stdout);
2478      generate_includes (stblfile);
# Line 2417 | Line 2480 | int main (int argc, char **argv)
2480      generate_func ();
2481  
2482      free (table68k);
2483 +    fclose (headerfile);
2484 +    fclose (stblfile);
2485 +    fflush (out);
2486      return 0;
2487   }

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