src/uae_cpu/readcpu.cpp

/*
 * UAE - The Un*x Amiga Emulator
 *
 * Read 68000 CPU specs from file "table68k"
 *
 * Copyright 1995,1996 Bernd Schmidt
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#include "sysdeps.h"
#include "readcpu.h"

int nr_cpuop_funcs;

struct mnemolookup lookuptab[] = {
    { i_ILLG, "ILLEGAL" },
    { i_OR, "OR" },
    { i_CHK, "CHK" },
    { i_CHK2, "CHK2" },
    { i_AND, "AND" },
    { i_EOR, "EOR" },
    { i_ORSR, "ORSR" },
    { i_ANDSR, "ANDSR" },
    { i_EORSR, "EORSR" },
    { i_SUB, "SUB" },
    { i_SUBA, "SUBA" },
    { i_SUBX, "SUBX" },
    { i_SBCD, "SBCD" },
    { i_ADD, "ADD" },
    { i_ADDA, "ADDA" },
    { i_ADDX, "ADDX" },
    { i_ABCD, "ABCD" },
    { i_NEG, "NEG" },
    { i_NEGX, "NEGX" },
    { i_NBCD, "NBCD" },
    { i_CLR, "CLR" },
    { i_NOT, "NOT" },
    { i_TST, "TST" },
    { i_BTST, "BTST" },
    { i_BCHG, "BCHG" },
    { i_BCLR, "BCLR" },
    { i_BSET, "BSET" },
    { i_CMP, "CMP" },
    { i_CMPM, "CMPM" },
    { i_CMPA, "CMPA" },
    { i_MVPRM, "MVPRM" },
    { i_MVPMR, "MVPMR" },
    { i_MOVE, "MOVE" },
    { i_MOVEA, "MOVEA" },
    { i_MVSR2, "MVSR2" },
    { i_MV2SR, "MV2SR" },
    { i_SWAP, "SWAP" },
    { i_EXG, "EXG" },
    { i_EXT, "EXT" },
    { i_MVMEL, "MVMEL" },
    { i_MVMLE, "MVMLE" },
    { i_TRAP, "TRAP" },
    { i_MVR2USP, "MVR2USP" },
    { i_MVUSP2R, "MVUSP2R" },
    { i_NOP, "NOP" },
    { i_RESET, "RESET" },
    { i_RTE, "RTE" },
    { i_RTD, "RTD" },
    { i_LINK, "LINK" },
    { i_UNLK, "UNLK" },
    { i_RTS, "RTS" },
    { i_STOP, "STOP" },
    { i_TRAPV, "TRAPV" },
    { i_RTR, "RTR" },
    { i_JSR, "JSR" },
    { i_JMP, "JMP" },
    { i_BSR, "BSR" },
    { i_Bcc, "Bcc" },
    { i_LEA, "LEA" },
    { i_PEA, "PEA" },
    { i_DBcc, "DBcc" },
    { i_Scc, "Scc" },
    { i_DIVU, "DIVU" },
    { i_DIVS, "DIVS" },
    { i_MULU, "MULU" },
    { i_MULS, "MULS" },
    { i_ASR, "ASR" },
    { i_ASL, "ASL" },
    { i_LSR, "LSR" },
    { i_LSL, "LSL" },
    { i_ROL, "ROL" },
    { i_ROR, "ROR" },
    { i_ROXL, "ROXL" },
    { i_ROXR, "ROXR" },
    { i_ASRW, "ASRW" },
    { i_ASLW, "ASLW" },
    { i_LSRW, "LSRW" },
    { i_LSLW, "LSLW" },
    { i_ROLW, "ROLW" },
    { i_RORW, "RORW" },
    { i_ROXLW, "ROXLW" },
    { i_ROXRW, "ROXRW" },

    { i_MOVE2C, "MOVE2C" },
    { i_MOVEC2, "MOVEC2" },
    { i_CAS, "CAS" },
    { i_CAS2, "CAS2" },
    { i_MULL, "MULL" },
    { i_DIVL, "DIVL" },
    { i_BFTST, "BFTST" },
    { i_BFEXTU, "BFEXTU" },
    { i_BFCHG, "BFCHG" },
    { i_BFEXTS, "BFEXTS" },
    { i_BFCLR, "BFCLR" },
    { i_BFFFO, "BFFFO" },
    { i_BFSET, "BFSET" },
    { i_BFINS, "BFINS" },
    { i_PACK, "PACK" },
    { i_UNPK, "UNPK" },
    { i_TAS, "TAS" },
    { i_BKPT, "BKPT" },
    { i_CALLM, "CALLM" },
    { i_RTM, "RTM" },
    { i_TRAPcc, "TRAPcc" },
    { i_MOVES, "MOVES" },
    { i_FPP, "FPP" },
    { i_FDBcc, "FDBcc" },
    { i_FScc, "FScc" },
    { i_FTRAPcc, "FTRAPcc" },
    { i_FBcc, "FBcc" },
    { i_FBcc, "FBcc" },
    { i_FSAVE, "FSAVE" },
    { i_FRESTORE, "FRESTORE" },

    { i_CINVL, "CINVL" },
    { i_CINVP, "CINVP" },
    { i_CINVA, "CINVA" },
    { i_CPUSHL, "CPUSHL" },
    { i_CPUSHP, "CPUSHP" },
    { i_CPUSHA, "CPUSHA" },
    { i_MOVE16, "MOVE16" },

    { i_MMUOP, "MMUOP" },
    { i_ILLG, "" },
};

struct instr *table68k;

static __inline__ amodes mode_from_str (const char *str)
{
    if (strncmp (str, "Dreg", 4) == 0) return Dreg;
    if (strncmp (str, "Areg", 4) == 0) return Areg;
    if (strncmp (str, "Aind", 4) == 0) return Aind;
    if (strncmp (str, "Apdi", 4) == 0) return Apdi;
    if (strncmp (str, "Aipi", 4) == 0) return Aipi;
    if (strncmp (str, "Ad16", 4) == 0) return Ad16;
    if (strncmp (str, "Ad8r", 4) == 0) return Ad8r;
    if (strncmp (str, "absw", 4) == 0) return absw;
    if (strncmp (str, "absl", 4) == 0) return absl;
    if (strncmp (str, "PC16", 4) == 0) return PC16;
    if (strncmp (str, "PC8r", 4) == 0) return PC8r;
    if (strncmp (str, "Immd", 4) == 0) return imm;
    abort ();
    return (amodes)0;
}

static __inline__ amodes mode_from_mr (int mode, int reg)
{
    switch (mode) {
     case 0: return Dreg;
     case 1: return Areg;
     case 2: return Aind;
     case 3: return Aipi;
     case 4: return Apdi;
     case 5: return Ad16;
     case 6: return Ad8r;
     case 7:
        switch (reg) {
         case 0: return absw;
         case 1: return absl;
         case 2: return PC16;
         case 3: return PC8r;
         case 4: return imm;
         case 5:
         case 6:
         case 7: return am_illg;
        }
    }
    abort ();
    return (amodes)0;
}

static void build_insn (int insn)
{
    int find = -1;
    int variants;
    struct instr_def id;
    const char *opcstr;
    int i;

    int flaglive = 0, flagdead = 0;

    id = defs68k[insn];

    for (i = 0; i < 5; i++) {
        switch (id.flaginfo[i].flagset){
         case fa_unset: break;
         case fa_isjmp: break;
         case fa_zero: flagdead |= 1 << i; break;
         case fa_one: flagdead |= 1 << i; break;
         case fa_dontcare: flagdead |= 1 << i; break;
         case fa_unknown: flagdead = -1; goto out1;
         case fa_set: flagdead |= 1 << i; break;
        }
    }

    out1:
    for (i = 0; i < 5; i++) {
        switch (id.flaginfo[i].flaguse) {
         case fu_unused: break;
         case fu_isjmp: flaglive |= 1 << i; break;
         case fu_maybecc: flaglive |= 1 << i; break;
         case fu_unknown: flaglive = -1; goto out2;
         case fu_used: flaglive |= 1 << i; break;
        }
    }
    out2:

    opcstr = id.opcstr;
    for (variants = 0; variants < (1 << id.n_variable); variants++) {
        int bitcnt[lastbit];
        int bitval[lastbit];
        int bitpos[lastbit];
        int i;
        uae_u16 opc = id.bits;
        uae_u16 msk, vmsk;
        int pos = 0;
        int mnp = 0;
        int bitno = 0;
        char mnemonic[10];

        wordsizes sz = sz_long;
        int srcgather = 0, dstgather = 0;
        int usesrc = 0, usedst = 0;
        int srctype = 0;
        int srcpos = -1, dstpos = -1;

        amodes srcmode = am_unknown, destmode = am_unknown;
        int srcreg = -1, destreg = -1;

        for (i = 0; i < lastbit; i++)
            bitcnt[i] = bitval[i] = 0;

        vmsk = 1 << id.n_variable;

        for (i = 0, msk = 0x8000; i < 16; i++, msk >>= 1) {
            if (!(msk & id.mask)) {
                int currbit = id.bitpos[bitno++];
                int bit_set;
                vmsk >>= 1;
                bit_set = variants & vmsk ? 1 : 0;
                if (bit_set)
                    opc |= msk;
                bitpos[currbit] = 15 - i;
                bitcnt[currbit]++;
                bitval[currbit] <<= 1;
                bitval[currbit] |= bit_set;
            }
        }

        if (bitval[bitj] == 0) bitval[bitj] = 8;
        /* first check whether this one does not match after all */
        if (bitval[bitz] == 3 || bitval[bitC] == 1)
            continue;
        if (bitcnt[bitI] && (bitval[bitI] == 0x00 || bitval[bitI] == 0xff))
            continue;

        /* bitI and bitC get copied to biti and bitc */
        if (bitcnt[bitI]) {
            bitval[biti] = bitval[bitI]; bitpos[biti] = bitpos[bitI];
        }
        if (bitcnt[bitC])
            bitval[bitc] = bitval[bitC];

        pos = 0;
        while (opcstr[pos] && !isspace(opcstr[pos])) {
            if (opcstr[pos] == '.') {
                pos++;
                switch (opcstr[pos]) {

                 case 'B': sz = sz_byte; break;
                 case 'W': sz = sz_word; break;
                 case 'L': sz = sz_long; break;
                 case 'z':
                    switch (bitval[bitz]) {
                     case 0: sz = sz_byte; break;
                     case 1: sz = sz_word; break;
                     case 2: sz = sz_long; break;
                     default: abort();
                    }
                    break;
                 default: abort();
                }
            } else {
                mnemonic[mnp] = opcstr[pos];
                if (mnemonic[mnp] == 'f') {
                    find = -1;
                    switch (bitval[bitf]) {
                     case 0: mnemonic[mnp] = 'R'; break;
                     case 1: mnemonic[mnp] = 'L'; break;
                     default: abort();
                    }
                }
                mnp++;
            }
            pos++;
        }
        mnemonic[mnp] = 0;

        /* now, we have read the mnemonic and the size */
        while (opcstr[pos] && isspace(opcstr[pos]))
            pos++;

        /* A goto a day keeps the D******a away. */
        if (opcstr[pos] == 0)
            goto endofline;

        /* parse the source address */
        usesrc = 1;
        switch (opcstr[pos++]) {
         case 'D':
            srcmode = Dreg;
            switch (opcstr[pos++]) {
             case 'r': srcreg = bitval[bitr]; srcgather = 1; srcpos = bitpos[bitr]; break;
             case 'R': srcreg = bitval[bitR]; srcgather = 1; srcpos = bitpos[bitR]; break;
             default: abort();
            }

            break;
         case 'A':
            srcmode = Areg;
            switch (opcstr[pos++]) {
             case 'r': srcreg = bitval[bitr]; srcgather = 1; srcpos = bitpos[bitr]; break;
             case 'R': srcreg = bitval[bitR]; srcgather = 1; srcpos = bitpos[bitR]; break;
             default: abort();
            }
            switch (opcstr[pos]) {
             case 'p': srcmode = Apdi; pos++; break;
             case 'P': srcmode = Aipi; pos++; break;
            }
            break;
         case '#':
            switch (opcstr[pos++]) {
             case 'z': srcmode = imm; break;
             case '0': srcmode = imm0; break;
             case '1': srcmode = imm1; break;
             case '2': srcmode = imm2; break;
             case 'i': srcmode = immi; srcreg = (uae_s32)(uae_s8)bitval[biti];
                if (CPU_EMU_SIZE < 4) {
                    /* Used for branch instructions */
                    srctype = 1;
                    srcgather = 1;
                    srcpos = bitpos[biti];
                }
                break;
             case 'j': srcmode = immi; srcreg = bitval[bitj];
                if (CPU_EMU_SIZE < 3) {
                    /* 1..8 for ADDQ/SUBQ and rotshi insns */
                    srcgather = 1;
                    srctype = 3;
                    srcpos = bitpos[bitj];
                }
                break;
             case 'J': srcmode = immi; srcreg = bitval[bitJ];
                if (CPU_EMU_SIZE < 5) {
                    /* 0..15 */
                    srcgather = 1;
                    srctype = 2;
                    srcpos = bitpos[bitJ];
                }
                break;
             case 'k': srcmode = immi; srcreg = bitval[bitk];
                if (CPU_EMU_SIZE < 3) {
                    srcgather = 1;
                    srctype = 4;
                    srcpos = bitpos[bitk];
                }
                break;
             case 'K': srcmode = immi; srcreg = bitval[bitK];
                if (CPU_EMU_SIZE < 5) {
                    /* 0..15 */
                    srcgather = 1;
                    srctype = 5;
                    srcpos = bitpos[bitK];
                }
                break;
             default: abort();
            }
            break;
         case 'd':
            srcreg = bitval[bitD];
            srcmode = mode_from_mr(bitval[bitd],bitval[bitD]);
            if (srcmode == am_illg)
                continue;
            if (CPU_EMU_SIZE < 2 &&
                (srcmode == Areg || srcmode == Dreg || srcmode == Aind
                 || srcmode == Ad16 || srcmode == Ad8r || srcmode == Aipi
                 || srcmode == Apdi))
            {
                srcgather = 1; srcpos = bitpos[bitD];
            }
            if (opcstr[pos] == '[') {
                pos++;
                if (opcstr[pos] == '!') {
                    /* exclusion */
                    do {
                        pos++;
                        if (mode_from_str(opcstr+pos) == srcmode)
                            goto nomatch;
                        pos += 4;
                    } while (opcstr[pos] == ',');
                    pos++;
                } else {
                    if (opcstr[pos+4] == '-') {
                        /* replacement */
                        if (mode_from_str(opcstr+pos) == srcmode)
                            srcmode = mode_from_str(opcstr+pos+5);
                        else
                            goto nomatch;
                        pos += 10;
                    } else {
                        /* normal */
                        while(mode_from_str(opcstr+pos) != srcmode) {
                            pos += 4;
                            if (opcstr[pos] == ']')
                                goto nomatch;
                            pos++;
                        }
                        while(opcstr[pos] != ']') pos++;
                        pos++;
                        break;
                    }
                }
            }
            /* Some addressing modes are invalid as destination */
            if (srcmode == imm || srcmode == PC16 || srcmode == PC8r)
                goto nomatch;
            break;
         case 's':
            srcreg = bitval[bitS];
            srcmode = mode_from_mr(bitval[bits],bitval[bitS]);

            if (srcmode == am_illg)
                continue;
            if (CPU_EMU_SIZE < 2 &&
                (srcmode == Areg || srcmode == Dreg || srcmode == Aind
                 || srcmode == Ad16 || srcmode == Ad8r || srcmode == Aipi
                 || srcmode == Apdi))
            {
                srcgather = 1; srcpos = bitpos[bitS];
            }
            if (opcstr[pos] == '[') {
                pos++;
                if (opcstr[pos] == '!') {
                    /* exclusion */
                    do {
                        pos++;
                        if (mode_from_str(opcstr+pos) == srcmode)
                            goto nomatch;
                        pos += 4;
                    } while (opcstr[pos] == ',');
                    pos++;
                } else {
                    if (opcstr[pos+4] == '-') {
                        /* replacement */
                        if (mode_from_str(opcstr+pos) == srcmode)
                            srcmode = mode_from_str(opcstr+pos+5);
                        else
                            goto nomatch;
                        pos += 10;
                    } else {
                        /* normal */
                        while(mode_from_str(opcstr+pos) != srcmode) {
                            pos += 4;
                            if (opcstr[pos] == ']')
                                goto nomatch;
                            pos++;
                        }
                        while(opcstr[pos] != ']') pos++;
                        pos++;
                    }
                }
            }
            break;
         default: abort();
        }
        /* safety check - might have changed */
        if (srcmode != Areg && srcmode != Dreg && srcmode != Aind
            && srcmode != Ad16 && srcmode != Ad8r && srcmode != Aipi
            && srcmode != Apdi && srcmode != immi)
        {
            srcgather = 0;
        }
        if (srcmode == Areg && sz == sz_byte)
            goto nomatch;

        if (opcstr[pos] != ',')
            goto endofline;
        pos++;

        /* parse the destination address */
        usedst = 1;
        switch (opcstr[pos++]) {
         case 'D':
            destmode = Dreg;
            switch (opcstr[pos++]) {
             case 'r': destreg = bitval[bitr]; dstgather = 1; dstpos = bitpos[bitr]; break;
             case 'R': destreg = bitval[bitR]; dstgather = 1; dstpos = bitpos[bitR]; break;
             default: abort();
            }
            break;
         case 'A':
            destmode = Areg;
            switch (opcstr[pos++]) {
             case 'r': destreg = bitval[bitr]; dstgather = 1; dstpos = bitpos[bitr]; break;
             case 'R': destreg = bitval[bitR]; dstgather = 1; dstpos = bitpos[bitR]; break;
             default: abort();
            }
            switch (opcstr[pos]) {
             case 'p': destmode = Apdi; pos++; break;
             case 'P': destmode = Aipi; pos++; break;
            }
            break;
         case '#':
            switch (opcstr[pos++]) {
             case 'z': destmode = imm; break;
             case '0': destmode = imm0; break;
             case '1': destmode = imm1; break;
             case '2': destmode = imm2; break;
             case 'i': destmode = immi; destreg = (uae_s32)(uae_s8)bitval[biti]; break;
             case 'j': destmode = immi; destreg = bitval[bitj]; break;
             case 'J': destmode = immi; destreg = bitval[bitJ]; break;
             case 'k': destmode = immi; destreg = bitval[bitk]; break;
             case 'K': destmode = immi; destreg = bitval[bitK]; break;
             default: abort();
            }
            break;
         case 'd':
            destreg = bitval[bitD];
            destmode = mode_from_mr(bitval[bitd],bitval[bitD]);
            if (destmode == am_illg)
                continue;
            if (CPU_EMU_SIZE < 1 &&
                (destmode == Areg || destmode == Dreg || destmode == Aind
                 || destmode == Ad16 || destmode == Ad8r || destmode == Aipi
                 || destmode == Apdi))
            {
                dstgather = 1; dstpos = bitpos[bitD];
            }

            if (opcstr[pos] == '[') {
                pos++;
                if (opcstr[pos] == '!') {
                    /* exclusion */
                    do {
                        pos++;
                        if (mode_from_str(opcstr+pos) == destmode)
                            goto nomatch;
                        pos += 4;
                    } while (opcstr[pos] == ',');
                    pos++;
                } else {
                    if (opcstr[pos+4] == '-') {
                        /* replacement */
                        if (mode_from_str(opcstr+pos) == destmode)
                            destmode = mode_from_str(opcstr+pos+5);
                        else
                            goto nomatch;
                        pos += 10;
                    } else {
                        /* normal */
                        while(mode_from_str(opcstr+pos) != destmode) {
                            pos += 4;
                            if (opcstr[pos] == ']')
                                goto nomatch;
                            pos++;
                        }
                        while(opcstr[pos] != ']') pos++;
                        pos++;
                        break;
                    }
                }
            }
            /* Some addressing modes are invalid as destination */
            if (destmode == imm || destmode == PC16 || destmode == PC8r)
                goto nomatch;
            break;
         case 's':
            destreg = bitval[bitS];
            destmode = mode_from_mr(bitval[bits],bitval[bitS]);

            if (destmode == am_illg)
                continue;
            if (CPU_EMU_SIZE < 1 &&
                (destmode == Areg || destmode == Dreg || destmode == Aind
                 || destmode == Ad16 || destmode == Ad8r || destmode == Aipi
                 || destmode == Apdi))
            {
                dstgather = 1; dstpos = bitpos[bitS];
            }

            if (opcstr[pos] == '[') {
                pos++;
                if (opcstr[pos] == '!') {
                    /* exclusion */
                    do {
                        pos++;
                        if (mode_from_str(opcstr+pos) == destmode)
                            goto nomatch;
                        pos += 4;
                    } while (opcstr[pos] == ',');
                    pos++;
                } else {
                    if (opcstr[pos+4] == '-') {
                        /* replacement */
                        if (mode_from_str(opcstr+pos) == destmode)
                            destmode = mode_from_str(opcstr+pos+5);
                        else
                            goto nomatch;
                        pos += 10;
                    } else {
                        /* normal */
                        while(mode_from_str(opcstr+pos) != destmode) {
                            pos += 4;
                            if (opcstr[pos] == ']')
                                goto nomatch;
                            pos++;
                        }
                        while(opcstr[pos] != ']') pos++;
                        pos++;
                    }
                }
            }
            break;
         default: abort();
        }
        /* safety check - might have changed */
        if (destmode != Areg && destmode != Dreg && destmode != Aind
            && destmode != Ad16 && destmode != Ad8r && destmode != Aipi
            && destmode != Apdi)
        {
            dstgather = 0;
        }

        if (destmode == Areg && sz == sz_byte)
            goto nomatch;
#if 0
        if (sz == sz_byte && (destmode == Aipi || destmode == Apdi)) {
            dstgather = 0;
        }
#endif
        endofline:
        /* now, we have a match */
        if (table68k[opc].mnemo != i_ILLG)
            fprintf(stderr, "Double match: %x: %s\n", opc, opcstr);
        if (find == -1) {
            for (find = 0;; find++) {
                if (strcmp(mnemonic, lookuptab[find].name) == 0) {
                    table68k[opc].mnemo = lookuptab[find].mnemo;
                    break;
                }
                if (strlen(lookuptab[find].name) == 0) abort();
            }
        }
        else {
            table68k[opc].mnemo = lookuptab[find].mnemo;
        }
        table68k[opc].cc = bitval[bitc];
        if (table68k[opc].mnemo == i_BTST
            || table68k[opc].mnemo == i_BSET
            || table68k[opc].mnemo == i_BCLR
            || table68k[opc].mnemo == i_BCHG)
        {
            sz = destmode == Dreg ? sz_long : sz_byte;
        }
        table68k[opc].size = sz;
        table68k[opc].sreg = srcreg;
        table68k[opc].dreg = destreg;
        table68k[opc].smode = srcmode;
        table68k[opc].dmode = destmode;
        table68k[opc].spos = srcgather ? srcpos : -1;
        table68k[opc].dpos = dstgather ? dstpos : -1;
        table68k[opc].suse = usesrc;
        table68k[opc].duse = usedst;
        table68k[opc].stype = srctype;
        table68k[opc].plev = id.plevel;
        table68k[opc].clev = id.cpulevel;
#if 0
        for (i = 0; i < 5; i++) {
            table68k[opc].flaginfo[i].flagset = id.flaginfo[i].flagset;
            table68k[opc].flaginfo[i].flaguse = id.flaginfo[i].flaguse;
        }
#endif
        table68k[opc].flagdead = flagdead;
        table68k[opc].flaglive = flaglive;
        nomatch:
        /* FOO! */;
    }
}


void read_table68k (void)
{
    int i;

    table68k = (struct instr *)malloc (65536 * sizeof (struct instr));
    for (i = 0; i < 65536; i++) {
        table68k[i].mnemo = i_ILLG;
        table68k[i].handler = -1;
    }
    for (i = 0; i < n_defs68k; i++) {
        build_insn (i);
    }
}

static int mismatch;

static void handle_merges (long int opcode)
{
    uae_u16 smsk;
    uae_u16 dmsk;
    int sbitdst, dstend;
    int srcreg, dstreg;

    if (table68k[opcode].spos == -1) {
        sbitdst = 1; smsk = 0;
    } else {
        switch (table68k[opcode].stype) {
         case 0:
            smsk = 7; sbitdst = 8; break;
         case 1:
            smsk = 255; sbitdst = 256; break;
         case 2:
            smsk = 15; sbitdst = 16; break;
         case 3:
            smsk = 7; sbitdst = 8; break;
         case 4:
            smsk = 7; sbitdst = 8; break;
         case 5:
            smsk = 63; sbitdst = 64; break;
         default:
            smsk = 0; sbitdst = 0;
            abort();
            break;
        }
        smsk <<= table68k[opcode].spos;
    }
    if (table68k[opcode].dpos == -1) {
        dstend = 1; dmsk = 0;
    } else {
        dmsk = 7 << table68k[opcode].dpos;
        dstend = 8;
    }
    for (srcreg=0; srcreg < sbitdst; srcreg++) {
        for (dstreg=0; dstreg < dstend; dstreg++) {
            uae_u16 code = opcode;

            code = (code & ~smsk) | (srcreg << table68k[opcode].spos);
            code = (code & ~dmsk) | (dstreg << table68k[opcode].dpos);

            /* Check whether this is in fact the same instruction.
             * The instructions should never differ, except for the
             * Bcc.(BW) case. */
            if (table68k[code].mnemo != table68k[opcode].mnemo
                || table68k[code].size != table68k[opcode].size
                || table68k[code].suse != table68k[opcode].suse
                || table68k[code].duse != table68k[opcode].duse)
            {
                mismatch++; continue;
            }
            if (table68k[opcode].suse
                && (table68k[opcode].spos != table68k[code].spos
                    || table68k[opcode].smode != table68k[code].smode
                    || table68k[opcode].stype != table68k[code].stype))
            {
                mismatch++; continue;
            }
            if (table68k[opcode].duse
                && (table68k[opcode].dpos != table68k[code].dpos
                    || table68k[opcode].dmode != table68k[code].dmode))
            {
                mismatch++; continue;
            }

            if (code != opcode)
                table68k[code].handler = opcode;
        }
    }
}

void do_merges (void)
{
    long int opcode;
    int nr = 0;
    mismatch = 0;
    for (opcode = 0; opcode < 65536; opcode++) {
        if (table68k[opcode].handler != -1 || table68k[opcode].mnemo == i_ILLG)
            continue;
        nr++;
        handle_merges (opcode);
    }
    nr_cpuop_funcs = nr;
}

int get_no_mismatches (void)
{
    return mismatch;
}
Revision:	1.2
Committed:	1999-10-28T15:33:24Z (25 years ago) by cebix
Branch:	MAIN
CVS Tags:	snapshot-13072000, snapshot-22121999, snapshot-17022001, release-0_8-1, snapshot-02111999
Changes since 1.1:	+9 -0 lines
Log Message:	- added some 68040 instructions: CINV, CPUSH, MOVE16 (Ax)+,(Ay)+, MOVEC regs, and FPU state frames; enough to boot MacOS - CPU type can be selected in GTK prefs editor
#	User	Rev	Content
1	cebix	1.1	/*
2			* UAE - The Un*x Amiga Emulator
3			*
4			* Read 68000 CPU specs from file "table68k"
5			*
6			* Copyright 1995,1996 Bernd Schmidt
7			*/
8
9			#include <stdio.h>
10			#include <stdlib.h>
11			#include <string.h>
12			#include <ctype.h>
13
14			#include "sysdeps.h"
15			#include "readcpu.h"
16
17			int nr_cpuop_funcs;
18
19			struct mnemolookup lookuptab[] = {
20			{ i_ILLG, "ILLEGAL" },
21			{ i_OR, "OR" },
22			{ i_CHK, "CHK" },
23			{ i_CHK2, "CHK2" },
24			{ i_AND, "AND" },
25			{ i_EOR, "EOR" },
26			{ i_ORSR, "ORSR" },
27			{ i_ANDSR, "ANDSR" },
28			{ i_EORSR, "EORSR" },
29			{ i_SUB, "SUB" },
30			{ i_SUBA, "SUBA" },
31			{ i_SUBX, "SUBX" },
32			{ i_SBCD, "SBCD" },
33			{ i_ADD, "ADD" },
34			{ i_ADDA, "ADDA" },
35			{ i_ADDX, "ADDX" },
36			{ i_ABCD, "ABCD" },
37			{ i_NEG, "NEG" },
38			{ i_NEGX, "NEGX" },
39			{ i_NBCD, "NBCD" },
40			{ i_CLR, "CLR" },
41			{ i_NOT, "NOT" },
42			{ i_TST, "TST" },
43			{ i_BTST, "BTST" },
44			{ i_BCHG, "BCHG" },
45			{ i_BCLR, "BCLR" },
46			{ i_BSET, "BSET" },
47			{ i_CMP, "CMP" },
48			{ i_CMPM, "CMPM" },
49			{ i_CMPA, "CMPA" },
50			{ i_MVPRM, "MVPRM" },
51			{ i_MVPMR, "MVPMR" },
52			{ i_MOVE, "MOVE" },
53			{ i_MOVEA, "MOVEA" },
54			{ i_MVSR2, "MVSR2" },
55			{ i_MV2SR, "MV2SR" },
56			{ i_SWAP, "SWAP" },
57			{ i_EXG, "EXG" },
58			{ i_EXT, "EXT" },
59			{ i_MVMEL, "MVMEL" },
60			{ i_MVMLE, "MVMLE" },
61			{ i_TRAP, "TRAP" },
62			{ i_MVR2USP, "MVR2USP" },
63			{ i_MVUSP2R, "MVUSP2R" },
64			{ i_NOP, "NOP" },
65			{ i_RESET, "RESET" },
66			{ i_RTE, "RTE" },
67			{ i_RTD, "RTD" },
68			{ i_LINK, "LINK" },
69			{ i_UNLK, "UNLK" },
70			{ i_RTS, "RTS" },
71			{ i_STOP, "STOP" },
72			{ i_TRAPV, "TRAPV" },
73			{ i_RTR, "RTR" },
74			{ i_JSR, "JSR" },
75			{ i_JMP, "JMP" },
76			{ i_BSR, "BSR" },
77			{ i_Bcc, "Bcc" },
78			{ i_LEA, "LEA" },
79			{ i_PEA, "PEA" },
80			{ i_DBcc, "DBcc" },
81			{ i_Scc, "Scc" },
82			{ i_DIVU, "DIVU" },
83			{ i_DIVS, "DIVS" },
84			{ i_MULU, "MULU" },
85			{ i_MULS, "MULS" },
86			{ i_ASR, "ASR" },
87			{ i_ASL, "ASL" },
88			{ i_LSR, "LSR" },
89			{ i_LSL, "LSL" },
90			{ i_ROL, "ROL" },
91			{ i_ROR, "ROR" },
92			{ i_ROXL, "ROXL" },
93			{ i_ROXR, "ROXR" },
94			{ i_ASRW, "ASRW" },
95			{ i_ASLW, "ASLW" },
96			{ i_LSRW, "LSRW" },
97			{ i_LSLW, "LSLW" },
98			{ i_ROLW, "ROLW" },
99			{ i_RORW, "RORW" },
100			{ i_ROXLW, "ROXLW" },
101			{ i_ROXRW, "ROXRW" },
102
103			{ i_MOVE2C, "MOVE2C" },
104			{ i_MOVEC2, "MOVEC2" },
105			{ i_CAS, "CAS" },
106			{ i_CAS2, "CAS2" },
107			{ i_MULL, "MULL" },
108			{ i_DIVL, "DIVL" },
109			{ i_BFTST, "BFTST" },
110			{ i_BFEXTU, "BFEXTU" },
111			{ i_BFCHG, "BFCHG" },
112			{ i_BFEXTS, "BFEXTS" },
113			{ i_BFCLR, "BFCLR" },
114			{ i_BFFFO, "BFFFO" },
115			{ i_BFSET, "BFSET" },
116			{ i_BFINS, "BFINS" },
117			{ i_PACK, "PACK" },
118			{ i_UNPK, "UNPK" },
119			{ i_TAS, "TAS" },
120			{ i_BKPT, "BKPT" },
121			{ i_CALLM, "CALLM" },
122			{ i_RTM, "RTM" },
123			{ i_TRAPcc, "TRAPcc" },
124			{ i_MOVES, "MOVES" },
125			{ i_FPP, "FPP" },
126			{ i_FDBcc, "FDBcc" },
127			{ i_FScc, "FScc" },
128			{ i_FTRAPcc, "FTRAPcc" },
129			{ i_FBcc, "FBcc" },
130			{ i_FBcc, "FBcc" },
131			{ i_FSAVE, "FSAVE" },
132			{ i_FRESTORE, "FRESTORE" },
133	cebix	1.2
134			{ i_CINVL, "CINVL" },
135			{ i_CINVP, "CINVP" },
136			{ i_CINVA, "CINVA" },
137			{ i_CPUSHL, "CPUSHL" },
138			{ i_CPUSHP, "CPUSHP" },
139			{ i_CPUSHA, "CPUSHA" },
140			{ i_MOVE16, "MOVE16" },
141
142	cebix	1.1	{ i_MMUOP, "MMUOP" },
143			{ i_ILLG, "" },
144			};
145
146			struct instr *table68k;
147
148			static __inline__ amodes mode_from_str (const char *str)
149			{
150			if (strncmp (str, "Dreg", 4) == 0) return Dreg;
151			if (strncmp (str, "Areg", 4) == 0) return Areg;
152			if (strncmp (str, "Aind", 4) == 0) return Aind;
153			if (strncmp (str, "Apdi", 4) == 0) return Apdi;
154			if (strncmp (str, "Aipi", 4) == 0) return Aipi;
155			if (strncmp (str, "Ad16", 4) == 0) return Ad16;
156			if (strncmp (str, "Ad8r", 4) == 0) return Ad8r;
157			if (strncmp (str, "absw", 4) == 0) return absw;
158			if (strncmp (str, "absl", 4) == 0) return absl;
159			if (strncmp (str, "PC16", 4) == 0) return PC16;
160			if (strncmp (str, "PC8r", 4) == 0) return PC8r;
161			if (strncmp (str, "Immd", 4) == 0) return imm;
162			abort ();
163			return (amodes)0;
164			}
165
166			static __inline__ amodes mode_from_mr (int mode, int reg)
167			{
168			switch (mode) {
169			case 0: return Dreg;
170			case 1: return Areg;
171			case 2: return Aind;
172			case 3: return Aipi;
173			case 4: return Apdi;
174			case 5: return Ad16;
175			case 6: return Ad8r;
176			case 7:
177			switch (reg) {
178			case 0: return absw;
179			case 1: return absl;
180			case 2: return PC16;
181			case 3: return PC8r;
182			case 4: return imm;
183			case 5:
184			case 6:
185			case 7: return am_illg;
186			}
187			}
188			abort ();
189			return (amodes)0;
190			}
191
192			static void build_insn (int insn)
193			{
194			int find = -1;
195			int variants;
196			struct instr_def id;
197			const char *opcstr;
198			int i;
199
200			int flaglive = 0, flagdead = 0;
201
202			id = defs68k[insn];
203
204			for (i = 0; i < 5; i++) {
205			switch (id.flaginfo[i].flagset){
206			case fa_unset: break;
207			case fa_isjmp: break;
208			case fa_zero: flagdead \|= 1 << i; break;
209			case fa_one: flagdead \|= 1 << i; break;
210			case fa_dontcare: flagdead \|= 1 << i; break;
211			case fa_unknown: flagdead = -1; goto out1;
212			case fa_set: flagdead \|= 1 << i; break;
213			}
214			}
215
216			out1:
217			for (i = 0; i < 5; i++) {
218			switch (id.flaginfo[i].flaguse) {
219			case fu_unused: break;
220			case fu_isjmp: flaglive \|= 1 << i; break;
221			case fu_maybecc: flaglive \|= 1 << i; break;
222			case fu_unknown: flaglive = -1; goto out2;
223			case fu_used: flaglive \|= 1 << i; break;
224			}
225			}
226			out2:
227
228			opcstr = id.opcstr;
229			for (variants = 0; variants < (1 << id.n_variable); variants++) {
230			int bitcnt[lastbit];
231			int bitval[lastbit];
232			int bitpos[lastbit];
233			int i;
234			uae_u16 opc = id.bits;
235			uae_u16 msk, vmsk;
236			int pos = 0;
237			int mnp = 0;
238			int bitno = 0;
239			char mnemonic[10];
240
241			wordsizes sz = sz_long;
242			int srcgather = 0, dstgather = 0;
243			int usesrc = 0, usedst = 0;
244			int srctype = 0;
245			int srcpos = -1, dstpos = -1;
246
247			amodes srcmode = am_unknown, destmode = am_unknown;
248			int srcreg = -1, destreg = -1;
249
250			for (i = 0; i < lastbit; i++)
251			bitcnt[i] = bitval[i] = 0;
252
253			vmsk = 1 << id.n_variable;
254
255			for (i = 0, msk = 0x8000; i < 16; i++, msk >>= 1) {
256			if (!(msk & id.mask)) {
257			int currbit = id.bitpos[bitno++];
258			int bit_set;
259			vmsk >>= 1;
260			bit_set = variants & vmsk ? 1 : 0;
261			if (bit_set)
262			opc \|= msk;
263			bitpos[currbit] = 15 - i;
264			bitcnt[currbit]++;
265			bitval[currbit] <<= 1;
266			bitval[currbit] \|= bit_set;
267			}
268			}
269
270			if (bitval[bitj] == 0) bitval[bitj] = 8;
271			/* first check whether this one does not match after all */
272			if (bitval[bitz] == 3 \|\| bitval[bitC] == 1)
273			continue;
274			if (bitcnt[bitI] && (bitval[bitI] == 0x00 \|\| bitval[bitI] == 0xff))
275			continue;
276
277			/* bitI and bitC get copied to biti and bitc */
278			if (bitcnt[bitI]) {
279			bitval[biti] = bitval[bitI]; bitpos[biti] = bitpos[bitI];
280			}
281			if (bitcnt[bitC])
282			bitval[bitc] = bitval[bitC];
283
284			pos = 0;
285			while (opcstr[pos] && !isspace(opcstr[pos])) {
286			if (opcstr[pos] == '.') {
287			pos++;
288			switch (opcstr[pos]) {
289
290			case 'B': sz = sz_byte; break;
291			case 'W': sz = sz_word; break;
292			case 'L': sz = sz_long; break;
293			case 'z':
294			switch (bitval[bitz]) {
295			case 0: sz = sz_byte; break;
296			case 1: sz = sz_word; break;
297			case 2: sz = sz_long; break;
298			default: abort();
299			}
300			break;
301			default: abort();
302			}
303			} else {
304			mnemonic[mnp] = opcstr[pos];
305			if (mnemonic[mnp] == 'f') {
306			find = -1;
307			switch (bitval[bitf]) {
308			case 0: mnemonic[mnp] = 'R'; break;
309			case 1: mnemonic[mnp] = 'L'; break;
310			default: abort();
311			}
312			}
313			mnp++;
314			}
315			pos++;
316			}
317			mnemonic[mnp] = 0;
318
319			/* now, we have read the mnemonic and the size */
320			while (opcstr[pos] && isspace(opcstr[pos]))
321			pos++;
322
323			/* A goto a day keeps the D*****a away. /
324			if (opcstr[pos] == 0)
325			goto endofline;
326
327			/* parse the source address */
328			usesrc = 1;
329			switch (opcstr[pos++]) {
330			case 'D':
331			srcmode = Dreg;
332			switch (opcstr[pos++]) {
333			case 'r': srcreg = bitval[bitr]; srcgather = 1; srcpos = bitpos[bitr]; break;
334			case 'R': srcreg = bitval[bitR]; srcgather = 1; srcpos = bitpos[bitR]; break;
335			default: abort();
336			}
337
338			break;
339			case 'A':
340			srcmode = Areg;
341			switch (opcstr[pos++]) {
342			case 'r': srcreg = bitval[bitr]; srcgather = 1; srcpos = bitpos[bitr]; break;
343			case 'R': srcreg = bitval[bitR]; srcgather = 1; srcpos = bitpos[bitR]; break;
344			default: abort();
345			}
346			switch (opcstr[pos]) {
347			case 'p': srcmode = Apdi; pos++; break;
348			case 'P': srcmode = Aipi; pos++; break;
349			}
350			break;
351			case '#':
352			switch (opcstr[pos++]) {
353			case 'z': srcmode = imm; break;
354			case '0': srcmode = imm0; break;
355			case '1': srcmode = imm1; break;
356			case '2': srcmode = imm2; break;
357			case 'i': srcmode = immi; srcreg = (uae_s32)(uae_s8)bitval[biti];
358			if (CPU_EMU_SIZE < 4) {
359			/* Used for branch instructions */
360			srctype = 1;
361			srcgather = 1;
362			srcpos = bitpos[biti];
363			}
364			break;
365			case 'j': srcmode = immi; srcreg = bitval[bitj];
366			if (CPU_EMU_SIZE < 3) {
367			/* 1..8 for ADDQ/SUBQ and rotshi insns */
368			srcgather = 1;
369			srctype = 3;
370			srcpos = bitpos[bitj];
371			}
372			break;
373			case 'J': srcmode = immi; srcreg = bitval[bitJ];
374			if (CPU_EMU_SIZE < 5) {
375			/* 0..15 */
376			srcgather = 1;
377			srctype = 2;
378			srcpos = bitpos[bitJ];
379			}
380			break;
381			case 'k': srcmode = immi; srcreg = bitval[bitk];
382			if (CPU_EMU_SIZE < 3) {
383			srcgather = 1;
384			srctype = 4;
385			srcpos = bitpos[bitk];
386			}
387			break;
388			case 'K': srcmode = immi; srcreg = bitval[bitK];
389			if (CPU_EMU_SIZE < 5) {
390			/* 0..15 */
391			srcgather = 1;
392			srctype = 5;
393			srcpos = bitpos[bitK];
394			}
395			break;
396			default: abort();
397			}
398			break;
399			case 'd':
400			srcreg = bitval[bitD];
401			srcmode = mode_from_mr(bitval[bitd],bitval[bitD]);
402			if (srcmode == am_illg)
403			continue;
404			if (CPU_EMU_SIZE < 2 &&
405			(srcmode == Areg \|\| srcmode == Dreg \|\| srcmode == Aind
406			\|\| srcmode == Ad16 \|\| srcmode == Ad8r \|\| srcmode == Aipi
407			\|\| srcmode == Apdi))
408			{
409			srcgather = 1; srcpos = bitpos[bitD];
410			}
411			if (opcstr[pos] == '[') {
412			pos++;
413			if (opcstr[pos] == '!') {
414			/* exclusion */
415			do {
416			pos++;
417			if (mode_from_str(opcstr+pos) == srcmode)
418			goto nomatch;
419			pos += 4;
420			} while (opcstr[pos] == ',');
421			pos++;
422			} else {
423			if (opcstr[pos+4] == '-') {
424			/* replacement */
425			if (mode_from_str(opcstr+pos) == srcmode)
426			srcmode = mode_from_str(opcstr+pos+5);
427			else
428			goto nomatch;
429			pos += 10;
430			} else {
431			/* normal */
432			while(mode_from_str(opcstr+pos) != srcmode) {
433			pos += 4;
434			if (opcstr[pos] == ']')
435			goto nomatch;
436			pos++;
437			}
438			while(opcstr[pos] != ']') pos++;
439			pos++;
440			break;
441			}
442			}
443			}
444			/* Some addressing modes are invalid as destination */
445			if (srcmode == imm \|\| srcmode == PC16 \|\| srcmode == PC8r)
446			goto nomatch;
447			break;
448			case 's':
449			srcreg = bitval[bitS];
450			srcmode = mode_from_mr(bitval[bits],bitval[bitS]);
451
452			if (srcmode == am_illg)
453			continue;
454			if (CPU_EMU_SIZE < 2 &&
455			(srcmode == Areg \|\| srcmode == Dreg \|\| srcmode == Aind
456			\|\| srcmode == Ad16 \|\| srcmode == Ad8r \|\| srcmode == Aipi
457			\|\| srcmode == Apdi))
458			{
459			srcgather = 1; srcpos = bitpos[bitS];
460			}
461			if (opcstr[pos] == '[') {
462			pos++;
463			if (opcstr[pos] == '!') {
464			/* exclusion */
465			do {
466			pos++;
467			if (mode_from_str(opcstr+pos) == srcmode)
468			goto nomatch;
469			pos += 4;
470			} while (opcstr[pos] == ',');
471			pos++;
472			} else {
473			if (opcstr[pos+4] == '-') {
474			/* replacement */
475			if (mode_from_str(opcstr+pos) == srcmode)
476			srcmode = mode_from_str(opcstr+pos+5);
477			else
478			goto nomatch;
479			pos += 10;
480			} else {
481			/* normal */
482			while(mode_from_str(opcstr+pos) != srcmode) {
483			pos += 4;
484			if (opcstr[pos] == ']')
485			goto nomatch;
486			pos++;
487			}
488			while(opcstr[pos] != ']') pos++;
489			pos++;
490			}
491			}
492			}
493			break;
494			default: abort();
495			}
496			/* safety check - might have changed */
497			if (srcmode != Areg && srcmode != Dreg && srcmode != Aind
498			&& srcmode != Ad16 && srcmode != Ad8r && srcmode != Aipi
499			&& srcmode != Apdi && srcmode != immi)
500			{
501			srcgather = 0;
502			}
503			if (srcmode == Areg && sz == sz_byte)
504			goto nomatch;
505
506			if (opcstr[pos] != ',')
507			goto endofline;
508			pos++;
509
510			/* parse the destination address */
511			usedst = 1;
512			switch (opcstr[pos++]) {
513			case 'D':
514			destmode = Dreg;
515			switch (opcstr[pos++]) {
516			case 'r': destreg = bitval[bitr]; dstgather = 1; dstpos = bitpos[bitr]; break;
517			case 'R': destreg = bitval[bitR]; dstgather = 1; dstpos = bitpos[bitR]; break;
518			default: abort();
519			}
520			break;
521			case 'A':
522			destmode = Areg;
523			switch (opcstr[pos++]) {
524			case 'r': destreg = bitval[bitr]; dstgather = 1; dstpos = bitpos[bitr]; break;
525			case 'R': destreg = bitval[bitR]; dstgather = 1; dstpos = bitpos[bitR]; break;
526			default: abort();
527			}
528			switch (opcstr[pos]) {
529			case 'p': destmode = Apdi; pos++; break;
530			case 'P': destmode = Aipi; pos++; break;
531			}
532			break;
533			case '#':
534			switch (opcstr[pos++]) {
535			case 'z': destmode = imm; break;
536			case '0': destmode = imm0; break;
537			case '1': destmode = imm1; break;
538			case '2': destmode = imm2; break;
539			case 'i': destmode = immi; destreg = (uae_s32)(uae_s8)bitval[biti]; break;
540			case 'j': destmode = immi; destreg = bitval[bitj]; break;
541			case 'J': destmode = immi; destreg = bitval[bitJ]; break;
542			case 'k': destmode = immi; destreg = bitval[bitk]; break;
543			case 'K': destmode = immi; destreg = bitval[bitK]; break;
544			default: abort();
545			}
546			break;
547			case 'd':
548			destreg = bitval[bitD];
549			destmode = mode_from_mr(bitval[bitd],bitval[bitD]);
550			if (destmode == am_illg)
551			continue;
552			if (CPU_EMU_SIZE < 1 &&
553			(destmode == Areg \|\| destmode == Dreg \|\| destmode == Aind
554			\|\| destmode == Ad16 \|\| destmode == Ad8r \|\| destmode == Aipi
555			\|\| destmode == Apdi))
556			{
557			dstgather = 1; dstpos = bitpos[bitD];
558			}
559
560			if (opcstr[pos] == '[') {
561			pos++;
562			if (opcstr[pos] == '!') {
563			/* exclusion */
564			do {
565			pos++;
566			if (mode_from_str(opcstr+pos) == destmode)
567			goto nomatch;
568			pos += 4;
569			} while (opcstr[pos] == ',');
570			pos++;
571			} else {
572			if (opcstr[pos+4] == '-') {
573			/* replacement */
574			if (mode_from_str(opcstr+pos) == destmode)
575			destmode = mode_from_str(opcstr+pos+5);
576			else
577			goto nomatch;
578			pos += 10;
579			} else {
580			/* normal */
581			while(mode_from_str(opcstr+pos) != destmode) {
582			pos += 4;
583			if (opcstr[pos] == ']')
584			goto nomatch;
585			pos++;
586			}
587			while(opcstr[pos] != ']') pos++;
588			pos++;
589			break;
590			}
591			}
592			}
593			/* Some addressing modes are invalid as destination */
594			if (destmode == imm \|\| destmode == PC16 \|\| destmode == PC8r)
595			goto nomatch;
596			break;
597			case 's':
598			destreg = bitval[bitS];
599			destmode = mode_from_mr(bitval[bits],bitval[bitS]);
600
601			if (destmode == am_illg)
602			continue;
603			if (CPU_EMU_SIZE < 1 &&
604			(destmode == Areg \|\| destmode == Dreg \|\| destmode == Aind
605			\|\| destmode == Ad16 \|\| destmode == Ad8r \|\| destmode == Aipi
606			\|\| destmode == Apdi))
607			{
608			dstgather = 1; dstpos = bitpos[bitS];
609			}
610
611			if (opcstr[pos] == '[') {
612			pos++;
613			if (opcstr[pos] == '!') {
614			/* exclusion */
615			do {
616			pos++;
617			if (mode_from_str(opcstr+pos) == destmode)
618			goto nomatch;
619			pos += 4;
620			} while (opcstr[pos] == ',');
621			pos++;
622			} else {
623			if (opcstr[pos+4] == '-') {
624			/* replacement */
625			if (mode_from_str(opcstr+pos) == destmode)
626			destmode = mode_from_str(opcstr+pos+5);
627			else
628			goto nomatch;
629			pos += 10;
630			} else {
631			/* normal */
632			while(mode_from_str(opcstr+pos) != destmode) {
633			pos += 4;
634			if (opcstr[pos] == ']')
635			goto nomatch;
636			pos++;
637			}
638			while(opcstr[pos] != ']') pos++;
639			pos++;
640			}
641			}
642			}
643			break;
644			default: abort();
645			}
646			/* safety check - might have changed */
647			if (destmode != Areg && destmode != Dreg && destmode != Aind
648			&& destmode != Ad16 && destmode != Ad8r && destmode != Aipi
649			&& destmode != Apdi)
650			{
651			dstgather = 0;
652			}
653
654			if (destmode == Areg && sz == sz_byte)
655			goto nomatch;
656			#if 0
657			if (sz == sz_byte && (destmode == Aipi \|\| destmode == Apdi)) {
658			dstgather = 0;
659			}
660			#endif
661			endofline:
662			/* now, we have a match */
663			if (table68k[opc].mnemo != i_ILLG)
664			fprintf(stderr, "Double match: %x: %s\n", opc, opcstr);
665			if (find == -1) {
666			for (find = 0;; find++) {
667			if (strcmp(mnemonic, lookuptab[find].name) == 0) {
668			table68k[opc].mnemo = lookuptab[find].mnemo;
669			break;
670			}
671			if (strlen(lookuptab[find].name) == 0) abort();
672			}
673			}
674			else {
675			table68k[opc].mnemo = lookuptab[find].mnemo;
676			}
677			table68k[opc].cc = bitval[bitc];
678			if (table68k[opc].mnemo == i_BTST
679			\|\| table68k[opc].mnemo == i_BSET
680			\|\| table68k[opc].mnemo == i_BCLR
681			\|\| table68k[opc].mnemo == i_BCHG)
682			{
683			sz = destmode == Dreg ? sz_long : sz_byte;
684			}
685			table68k[opc].size = sz;
686			table68k[opc].sreg = srcreg;
687			table68k[opc].dreg = destreg;
688			table68k[opc].smode = srcmode;
689			table68k[opc].dmode = destmode;
690			table68k[opc].spos = srcgather ? srcpos : -1;
691			table68k[opc].dpos = dstgather ? dstpos : -1;
692			table68k[opc].suse = usesrc;
693			table68k[opc].duse = usedst;
694			table68k[opc].stype = srctype;
695			table68k[opc].plev = id.plevel;
696			table68k[opc].clev = id.cpulevel;
697			#if 0
698			for (i = 0; i < 5; i++) {
699			table68k[opc].flaginfo[i].flagset = id.flaginfo[i].flagset;
700			table68k[opc].flaginfo[i].flaguse = id.flaginfo[i].flaguse;
701			}
702			#endif
703			table68k[opc].flagdead = flagdead;
704			table68k[opc].flaglive = flaglive;
705			nomatch:
706			/* FOO! */;
707			}
708			}
709
710
711			void read_table68k (void)
712			{
713			int i;
714
715			table68k = (struct instr )malloc (65536 sizeof (struct instr));
716			for (i = 0; i < 65536; i++) {
717			table68k[i].mnemo = i_ILLG;
718			table68k[i].handler = -1;
719			}
720			for (i = 0; i < n_defs68k; i++) {
721			build_insn (i);
722			}
723			}
724
725			static int mismatch;
726
727			static void handle_merges (long int opcode)
728			{
729			uae_u16 smsk;
730			uae_u16 dmsk;
731			int sbitdst, dstend;
732			int srcreg, dstreg;
733
734			if (table68k[opcode].spos == -1) {
735			sbitdst = 1; smsk = 0;
736			} else {
737			switch (table68k[opcode].stype) {
738			case 0:
739			smsk = 7; sbitdst = 8; break;
740			case 1:
741			smsk = 255; sbitdst = 256; break;
742			case 2:
743			smsk = 15; sbitdst = 16; break;
744			case 3:
745			smsk = 7; sbitdst = 8; break;
746			case 4:
747			smsk = 7; sbitdst = 8; break;
748			case 5:
749			smsk = 63; sbitdst = 64; break;
750			default:
751			smsk = 0; sbitdst = 0;
752			abort();
753			break;
754			}
755			smsk <<= table68k[opcode].spos;
756			}
757			if (table68k[opcode].dpos == -1) {
758			dstend = 1; dmsk = 0;
759			} else {
760			dmsk = 7 << table68k[opcode].dpos;
761			dstend = 8;
762			}
763			for (srcreg=0; srcreg < sbitdst; srcreg++) {
764			for (dstreg=0; dstreg < dstend; dstreg++) {
765			uae_u16 code = opcode;
766
767			code = (code & ~smsk) \| (srcreg << table68k[opcode].spos);
768			code = (code & ~dmsk) \| (dstreg << table68k[opcode].dpos);
769
770			/* Check whether this is in fact the same instruction.
771			* The instructions should never differ, except for the
772			* Bcc.(BW) case. */
773			if (table68k[code].mnemo != table68k[opcode].mnemo
774			\|\| table68k[code].size != table68k[opcode].size
775			\|\| table68k[code].suse != table68k[opcode].suse
776			\|\| table68k[code].duse != table68k[opcode].duse)
777			{
778			mismatch++; continue;
779			}
780			if (table68k[opcode].suse
781			&& (table68k[opcode].spos != table68k[code].spos
782			\|\| table68k[opcode].smode != table68k[code].smode
783			\|\| table68k[opcode].stype != table68k[code].stype))
784			{
785			mismatch++; continue;
786			}
787			if (table68k[opcode].duse
788			&& (table68k[opcode].dpos != table68k[code].dpos
789			\|\| table68k[opcode].dmode != table68k[code].dmode))
790			{
791			mismatch++; continue;
792			}
793
794			if (code != opcode)
795			table68k[code].handler = opcode;
796			}
797			}
798			}
799
800			void do_merges (void)
801			{
802			long int opcode;
803			int nr = 0;
804			mismatch = 0;
805			for (opcode = 0; opcode < 65536; opcode++) {
806			if (table68k[opcode].handler != -1 \|\| table68k[opcode].mnemo == i_ILLG)
807			continue;
808			nr++;
809			handle_merges (opcode);
810			}
811			nr_cpuop_funcs = nr;
812			}
813
814			int get_no_mismatches (void)
815			{
816			return mismatch;
817			}