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_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:	1.1
Committed:	1999-10-03T14:16:26Z (25 years, 1 month ago) by cebix
Branch:	MAIN
Branch point for:	cebix
Log Message:	Initial revision
#	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			{ i_MMUOP, "MMUOP" },
134			{ i_ILLG, "" },
135			};
136
137			struct instr *table68k;
138
139			static __inline__ amodes mode_from_str (const char *str)
140			{
141			if (strncmp (str, "Dreg", 4) == 0) return Dreg;
142			if (strncmp (str, "Areg", 4) == 0) return Areg;
143			if (strncmp (str, "Aind", 4) == 0) return Aind;
144			if (strncmp (str, "Apdi", 4) == 0) return Apdi;
145			if (strncmp (str, "Aipi", 4) == 0) return Aipi;
146			if (strncmp (str, "Ad16", 4) == 0) return Ad16;
147			if (strncmp (str, "Ad8r", 4) == 0) return Ad8r;
148			if (strncmp (str, "absw", 4) == 0) return absw;
149			if (strncmp (str, "absl", 4) == 0) return absl;
150			if (strncmp (str, "PC16", 4) == 0) return PC16;
151			if (strncmp (str, "PC8r", 4) == 0) return PC8r;
152			if (strncmp (str, "Immd", 4) == 0) return imm;
153			abort ();
154			return (amodes)0;
155			}
156
157			static __inline__ amodes mode_from_mr (int mode, int reg)
158			{
159			switch (mode) {
160			case 0: return Dreg;
161			case 1: return Areg;
162			case 2: return Aind;
163			case 3: return Aipi;
164			case 4: return Apdi;
165			case 5: return Ad16;
166			case 6: return Ad8r;
167			case 7:
168			switch (reg) {
169			case 0: return absw;
170			case 1: return absl;
171			case 2: return PC16;
172			case 3: return PC8r;
173			case 4: return imm;
174			case 5:
175			case 6:
176			case 7: return am_illg;
177			}
178			}
179			abort ();
180			return (amodes)0;
181			}
182
183			static void build_insn (int insn)
184			{
185			int find = -1;
186			int variants;
187			struct instr_def id;
188			const char *opcstr;
189			int i;
190
191			int flaglive = 0, flagdead = 0;
192
193			id = defs68k[insn];
194
195			for (i = 0; i < 5; i++) {
196			switch (id.flaginfo[i].flagset){
197			case fa_unset: break;
198			case fa_isjmp: break;
199			case fa_zero: flagdead \|= 1 << i; break;
200			case fa_one: flagdead \|= 1 << i; break;
201			case fa_dontcare: flagdead \|= 1 << i; break;
202			case fa_unknown: flagdead = -1; goto out1;
203			case fa_set: flagdead \|= 1 << i; break;
204			}
205			}
206
207			out1:
208			for (i = 0; i < 5; i++) {
209			switch (id.flaginfo[i].flaguse) {
210			case fu_unused: break;
211			case fu_isjmp: flaglive \|= 1 << i; break;
212			case fu_maybecc: flaglive \|= 1 << i; break;
213			case fu_unknown: flaglive = -1; goto out2;
214			case fu_used: flaglive \|= 1 << i; break;
215			}
216			}
217			out2:
218
219			opcstr = id.opcstr;
220			for (variants = 0; variants < (1 << id.n_variable); variants++) {
221			int bitcnt[lastbit];
222			int bitval[lastbit];
223			int bitpos[lastbit];
224			int i;
225			uae_u16 opc = id.bits;
226			uae_u16 msk, vmsk;
227			int pos = 0;
228			int mnp = 0;
229			int bitno = 0;
230			char mnemonic[10];
231
232			wordsizes sz = sz_long;
233			int srcgather = 0, dstgather = 0;
234			int usesrc = 0, usedst = 0;
235			int srctype = 0;
236			int srcpos = -1, dstpos = -1;
237
238			amodes srcmode = am_unknown, destmode = am_unknown;
239			int srcreg = -1, destreg = -1;
240
241			for (i = 0; i < lastbit; i++)
242			bitcnt[i] = bitval[i] = 0;
243
244			vmsk = 1 << id.n_variable;
245
246			for (i = 0, msk = 0x8000; i < 16; i++, msk >>= 1) {
247			if (!(msk & id.mask)) {
248			int currbit = id.bitpos[bitno++];
249			int bit_set;
250			vmsk >>= 1;
251			bit_set = variants & vmsk ? 1 : 0;
252			if (bit_set)
253			opc \|= msk;
254			bitpos[currbit] = 15 - i;
255			bitcnt[currbit]++;
256			bitval[currbit] <<= 1;
257			bitval[currbit] \|= bit_set;
258			}
259			}
260
261			if (bitval[bitj] == 0) bitval[bitj] = 8;
262			/* first check whether this one does not match after all */
263			if (bitval[bitz] == 3 \|\| bitval[bitC] == 1)
264			continue;
265			if (bitcnt[bitI] && (bitval[bitI] == 0x00 \|\| bitval[bitI] == 0xff))
266			continue;
267
268			/* bitI and bitC get copied to biti and bitc */
269			if (bitcnt[bitI]) {
270			bitval[biti] = bitval[bitI]; bitpos[biti] = bitpos[bitI];
271			}
272			if (bitcnt[bitC])
273			bitval[bitc] = bitval[bitC];
274
275			pos = 0;
276			while (opcstr[pos] && !isspace(opcstr[pos])) {
277			if (opcstr[pos] == '.') {
278			pos++;
279			switch (opcstr[pos]) {
280
281			case 'B': sz = sz_byte; break;
282			case 'W': sz = sz_word; break;
283			case 'L': sz = sz_long; break;
284			case 'z':
285			switch (bitval[bitz]) {
286			case 0: sz = sz_byte; break;
287			case 1: sz = sz_word; break;
288			case 2: sz = sz_long; break;
289			default: abort();
290			}
291			break;
292			default: abort();
293			}
294			} else {
295			mnemonic[mnp] = opcstr[pos];
296			if (mnemonic[mnp] == 'f') {
297			find = -1;
298			switch (bitval[bitf]) {
299			case 0: mnemonic[mnp] = 'R'; break;
300			case 1: mnemonic[mnp] = 'L'; break;
301			default: abort();
302			}
303			}
304			mnp++;
305			}
306			pos++;
307			}
308			mnemonic[mnp] = 0;
309
310			/* now, we have read the mnemonic and the size */
311			while (opcstr[pos] && isspace(opcstr[pos]))
312			pos++;
313
314			/* A goto a day keeps the D*****a away. /
315			if (opcstr[pos] == 0)
316			goto endofline;
317
318			/* parse the source address */
319			usesrc = 1;
320			switch (opcstr[pos++]) {
321			case 'D':
322			srcmode = Dreg;
323			switch (opcstr[pos++]) {
324			case 'r': srcreg = bitval[bitr]; srcgather = 1; srcpos = bitpos[bitr]; break;
325			case 'R': srcreg = bitval[bitR]; srcgather = 1; srcpos = bitpos[bitR]; break;
326			default: abort();
327			}
328
329			break;
330			case 'A':
331			srcmode = Areg;
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			switch (opcstr[pos]) {
338			case 'p': srcmode = Apdi; pos++; break;
339			case 'P': srcmode = Aipi; pos++; break;
340			}
341			break;
342			case '#':
343			switch (opcstr[pos++]) {
344			case 'z': srcmode = imm; break;
345			case '0': srcmode = imm0; break;
346			case '1': srcmode = imm1; break;
347			case '2': srcmode = imm2; break;
348			case 'i': srcmode = immi; srcreg = (uae_s32)(uae_s8)bitval[biti];
349			if (CPU_EMU_SIZE < 4) {
350			/* Used for branch instructions */
351			srctype = 1;
352			srcgather = 1;
353			srcpos = bitpos[biti];
354			}
355			break;
356			case 'j': srcmode = immi; srcreg = bitval[bitj];
357			if (CPU_EMU_SIZE < 3) {
358			/* 1..8 for ADDQ/SUBQ and rotshi insns */
359			srcgather = 1;
360			srctype = 3;
361			srcpos = bitpos[bitj];
362			}
363			break;
364			case 'J': srcmode = immi; srcreg = bitval[bitJ];
365			if (CPU_EMU_SIZE < 5) {
366			/* 0..15 */
367			srcgather = 1;
368			srctype = 2;
369			srcpos = bitpos[bitJ];
370			}
371			break;
372			case 'k': srcmode = immi; srcreg = bitval[bitk];
373			if (CPU_EMU_SIZE < 3) {
374			srcgather = 1;
375			srctype = 4;
376			srcpos = bitpos[bitk];
377			}
378			break;
379			case 'K': srcmode = immi; srcreg = bitval[bitK];
380			if (CPU_EMU_SIZE < 5) {
381			/* 0..15 */
382			srcgather = 1;
383			srctype = 5;
384			srcpos = bitpos[bitK];
385			}
386			break;
387			default: abort();
388			}
389			break;
390			case 'd':
391			srcreg = bitval[bitD];
392			srcmode = mode_from_mr(bitval[bitd],bitval[bitD]);
393			if (srcmode == am_illg)
394			continue;
395			if (CPU_EMU_SIZE < 2 &&
396			(srcmode == Areg \|\| srcmode == Dreg \|\| srcmode == Aind
397			\|\| srcmode == Ad16 \|\| srcmode == Ad8r \|\| srcmode == Aipi
398			\|\| srcmode == Apdi))
399			{
400			srcgather = 1; srcpos = bitpos[bitD];
401			}
402			if (opcstr[pos] == '[') {
403			pos++;
404			if (opcstr[pos] == '!') {
405			/* exclusion */
406			do {
407			pos++;
408			if (mode_from_str(opcstr+pos) == srcmode)
409			goto nomatch;
410			pos += 4;
411			} while (opcstr[pos] == ',');
412			pos++;
413			} else {
414			if (opcstr[pos+4] == '-') {
415			/* replacement */
416			if (mode_from_str(opcstr+pos) == srcmode)
417			srcmode = mode_from_str(opcstr+pos+5);
418			else
419			goto nomatch;
420			pos += 10;
421			} else {
422			/* normal */
423			while(mode_from_str(opcstr+pos) != srcmode) {
424			pos += 4;
425			if (opcstr[pos] == ']')
426			goto nomatch;
427			pos++;
428			}
429			while(opcstr[pos] != ']') pos++;
430			pos++;
431			break;
432			}
433			}
434			}
435			/* Some addressing modes are invalid as destination */
436			if (srcmode == imm \|\| srcmode == PC16 \|\| srcmode == PC8r)
437			goto nomatch;
438			break;
439			case 's':
440			srcreg = bitval[bitS];
441			srcmode = mode_from_mr(bitval[bits],bitval[bitS]);
442
443			if (srcmode == am_illg)
444			continue;
445			if (CPU_EMU_SIZE < 2 &&
446			(srcmode == Areg \|\| srcmode == Dreg \|\| srcmode == Aind
447			\|\| srcmode == Ad16 \|\| srcmode == Ad8r \|\| srcmode == Aipi
448			\|\| srcmode == Apdi))
449			{
450			srcgather = 1; srcpos = bitpos[bitS];
451			}
452			if (opcstr[pos] == '[') {
453			pos++;
454			if (opcstr[pos] == '!') {
455			/* exclusion */
456			do {
457			pos++;
458			if (mode_from_str(opcstr+pos) == srcmode)
459			goto nomatch;
460			pos += 4;
461			} while (opcstr[pos] == ',');
462			pos++;
463			} else {
464			if (opcstr[pos+4] == '-') {
465			/* replacement */
466			if (mode_from_str(opcstr+pos) == srcmode)
467			srcmode = mode_from_str(opcstr+pos+5);
468			else
469			goto nomatch;
470			pos += 10;
471			} else {
472			/* normal */
473			while(mode_from_str(opcstr+pos) != srcmode) {
474			pos += 4;
475			if (opcstr[pos] == ']')
476			goto nomatch;
477			pos++;
478			}
479			while(opcstr[pos] != ']') pos++;
480			pos++;
481			}
482			}
483			}
484			break;
485			default: abort();
486			}
487			/* safety check - might have changed */
488			if (srcmode != Areg && srcmode != Dreg && srcmode != Aind
489			&& srcmode != Ad16 && srcmode != Ad8r && srcmode != Aipi
490			&& srcmode != Apdi && srcmode != immi)
491			{
492			srcgather = 0;
493			}
494			if (srcmode == Areg && sz == sz_byte)
495			goto nomatch;
496
497			if (opcstr[pos] != ',')
498			goto endofline;
499			pos++;
500
501			/* parse the destination address */
502			usedst = 1;
503			switch (opcstr[pos++]) {
504			case 'D':
505			destmode = Dreg;
506			switch (opcstr[pos++]) {
507			case 'r': destreg = bitval[bitr]; dstgather = 1; dstpos = bitpos[bitr]; break;
508			case 'R': destreg = bitval[bitR]; dstgather = 1; dstpos = bitpos[bitR]; break;
509			default: abort();
510			}
511			break;
512			case 'A':
513			destmode = Areg;
514			switch (opcstr[pos++]) {
515			case 'r': destreg = bitval[bitr]; dstgather = 1; dstpos = bitpos[bitr]; break;
516			case 'R': destreg = bitval[bitR]; dstgather = 1; dstpos = bitpos[bitR]; break;
517			default: abort();
518			}
519			switch (opcstr[pos]) {
520			case 'p': destmode = Apdi; pos++; break;
521			case 'P': destmode = Aipi; pos++; break;
522			}
523			break;
524			case '#':
525			switch (opcstr[pos++]) {
526			case 'z': destmode = imm; break;
527			case '0': destmode = imm0; break;
528			case '1': destmode = imm1; break;
529			case '2': destmode = imm2; break;
530			case 'i': destmode = immi; destreg = (uae_s32)(uae_s8)bitval[biti]; break;
531			case 'j': destmode = immi; destreg = bitval[bitj]; break;
532			case 'J': destmode = immi; destreg = bitval[bitJ]; break;
533			case 'k': destmode = immi; destreg = bitval[bitk]; break;
534			case 'K': destmode = immi; destreg = bitval[bitK]; break;
535			default: abort();
536			}
537			break;
538			case 'd':
539			destreg = bitval[bitD];
540			destmode = mode_from_mr(bitval[bitd],bitval[bitD]);
541			if (destmode == am_illg)
542			continue;
543			if (CPU_EMU_SIZE < 1 &&
544			(destmode == Areg \|\| destmode == Dreg \|\| destmode == Aind
545			\|\| destmode == Ad16 \|\| destmode == Ad8r \|\| destmode == Aipi
546			\|\| destmode == Apdi))
547			{
548			dstgather = 1; dstpos = bitpos[bitD];
549			}
550
551			if (opcstr[pos] == '[') {
552			pos++;
553			if (opcstr[pos] == '!') {
554			/* exclusion */
555			do {
556			pos++;
557			if (mode_from_str(opcstr+pos) == destmode)
558			goto nomatch;
559			pos += 4;
560			} while (opcstr[pos] == ',');
561			pos++;
562			} else {
563			if (opcstr[pos+4] == '-') {
564			/* replacement */
565			if (mode_from_str(opcstr+pos) == destmode)
566			destmode = mode_from_str(opcstr+pos+5);
567			else
568			goto nomatch;
569			pos += 10;
570			} else {
571			/* normal */
572			while(mode_from_str(opcstr+pos) != destmode) {
573			pos += 4;
574			if (opcstr[pos] == ']')
575			goto nomatch;
576			pos++;
577			}
578			while(opcstr[pos] != ']') pos++;
579			pos++;
580			break;
581			}
582			}
583			}
584			/* Some addressing modes are invalid as destination */
585			if (destmode == imm \|\| destmode == PC16 \|\| destmode == PC8r)
586			goto nomatch;
587			break;
588			case 's':
589			destreg = bitval[bitS];
590			destmode = mode_from_mr(bitval[bits],bitval[bitS]);
591
592			if (destmode == am_illg)
593			continue;
594			if (CPU_EMU_SIZE < 1 &&
595			(destmode == Areg \|\| destmode == Dreg \|\| destmode == Aind
596			\|\| destmode == Ad16 \|\| destmode == Ad8r \|\| destmode == Aipi
597			\|\| destmode == Apdi))
598			{
599			dstgather = 1; dstpos = bitpos[bitS];
600			}
601
602			if (opcstr[pos] == '[') {
603			pos++;
604			if (opcstr[pos] == '!') {
605			/* exclusion */
606			do {
607			pos++;
608			if (mode_from_str(opcstr+pos) == destmode)
609			goto nomatch;
610			pos += 4;
611			} while (opcstr[pos] == ',');
612			pos++;
613			} else {
614			if (opcstr[pos+4] == '-') {
615			/* replacement */
616			if (mode_from_str(opcstr+pos) == destmode)
617			destmode = mode_from_str(opcstr+pos+5);
618			else
619			goto nomatch;
620			pos += 10;
621			} else {
622			/* normal */
623			while(mode_from_str(opcstr+pos) != destmode) {
624			pos += 4;
625			if (opcstr[pos] == ']')
626			goto nomatch;
627			pos++;
628			}
629			while(opcstr[pos] != ']') pos++;
630			pos++;
631			}
632			}
633			}
634			break;
635			default: abort();
636			}
637			/* safety check - might have changed */
638			if (destmode != Areg && destmode != Dreg && destmode != Aind
639			&& destmode != Ad16 && destmode != Ad8r && destmode != Aipi
640			&& destmode != Apdi)
641			{
642			dstgather = 0;
643			}
644
645			if (destmode == Areg && sz == sz_byte)
646			goto nomatch;
647			#if 0
648			if (sz == sz_byte && (destmode == Aipi \|\| destmode == Apdi)) {
649			dstgather = 0;
650			}
651			#endif
652			endofline:
653			/* now, we have a match */
654			if (table68k[opc].mnemo != i_ILLG)
655			fprintf(stderr, "Double match: %x: %s\n", opc, opcstr);
656			if (find == -1) {
657			for (find = 0;; find++) {
658			if (strcmp(mnemonic, lookuptab[find].name) == 0) {
659			table68k[opc].mnemo = lookuptab[find].mnemo;
660			break;
661			}
662			if (strlen(lookuptab[find].name) == 0) abort();
663			}
664			}
665			else {
666			table68k[opc].mnemo = lookuptab[find].mnemo;
667			}
668			table68k[opc].cc = bitval[bitc];
669			if (table68k[opc].mnemo == i_BTST
670			\|\| table68k[opc].mnemo == i_BSET
671			\|\| table68k[opc].mnemo == i_BCLR
672			\|\| table68k[opc].mnemo == i_BCHG)
673			{
674			sz = destmode == Dreg ? sz_long : sz_byte;
675			}
676			table68k[opc].size = sz;
677			table68k[opc].sreg = srcreg;
678			table68k[opc].dreg = destreg;
679			table68k[opc].smode = srcmode;
680			table68k[opc].dmode = destmode;
681			table68k[opc].spos = srcgather ? srcpos : -1;
682			table68k[opc].dpos = dstgather ? dstpos : -1;
683			table68k[opc].suse = usesrc;
684			table68k[opc].duse = usedst;
685			table68k[opc].stype = srctype;
686			table68k[opc].plev = id.plevel;
687			table68k[opc].clev = id.cpulevel;
688			#if 0
689			for (i = 0; i < 5; i++) {
690			table68k[opc].flaginfo[i].flagset = id.flaginfo[i].flagset;
691			table68k[opc].flaginfo[i].flaguse = id.flaginfo[i].flaguse;
692			}
693			#endif
694			table68k[opc].flagdead = flagdead;
695			table68k[opc].flaglive = flaglive;
696			nomatch:
697			/* FOO! */;
698			}
699			}
700
701
702			void read_table68k (void)
703			{
704			int i;
705
706			table68k = (struct instr )malloc (65536 sizeof (struct instr));
707			for (i = 0; i < 65536; i++) {
708			table68k[i].mnemo = i_ILLG;
709			table68k[i].handler = -1;
710			}
711			for (i = 0; i < n_defs68k; i++) {
712			build_insn (i);
713			}
714			}
715
716			static int mismatch;
717
718			static void handle_merges (long int opcode)
719			{
720			uae_u16 smsk;
721			uae_u16 dmsk;
722			int sbitdst, dstend;
723			int srcreg, dstreg;
724
725			if (table68k[opcode].spos == -1) {
726			sbitdst = 1; smsk = 0;
727			} else {
728			switch (table68k[opcode].stype) {
729			case 0:
730			smsk = 7; sbitdst = 8; break;
731			case 1:
732			smsk = 255; sbitdst = 256; break;
733			case 2:
734			smsk = 15; sbitdst = 16; break;
735			case 3:
736			smsk = 7; sbitdst = 8; break;
737			case 4:
738			smsk = 7; sbitdst = 8; break;
739			case 5:
740			smsk = 63; sbitdst = 64; break;
741			default:
742			smsk = 0; sbitdst = 0;
743			abort();
744			break;
745			}
746			smsk <<= table68k[opcode].spos;
747			}
748			if (table68k[opcode].dpos == -1) {
749			dstend = 1; dmsk = 0;
750			} else {
751			dmsk = 7 << table68k[opcode].dpos;
752			dstend = 8;
753			}
754			for (srcreg=0; srcreg < sbitdst; srcreg++) {
755			for (dstreg=0; dstreg < dstend; dstreg++) {
756			uae_u16 code = opcode;
757
758			code = (code & ~smsk) \| (srcreg << table68k[opcode].spos);
759			code = (code & ~dmsk) \| (dstreg << table68k[opcode].dpos);
760
761			/* Check whether this is in fact the same instruction.
762			* The instructions should never differ, except for the
763			* Bcc.(BW) case. */
764			if (table68k[code].mnemo != table68k[opcode].mnemo
765			\|\| table68k[code].size != table68k[opcode].size
766			\|\| table68k[code].suse != table68k[opcode].suse
767			\|\| table68k[code].duse != table68k[opcode].duse)
768			{
769			mismatch++; continue;
770			}
771			if (table68k[opcode].suse
772			&& (table68k[opcode].spos != table68k[code].spos
773			\|\| table68k[opcode].smode != table68k[code].smode
774			\|\| table68k[opcode].stype != table68k[code].stype))
775			{
776			mismatch++; continue;
777			}
778			if (table68k[opcode].duse
779			&& (table68k[opcode].dpos != table68k[code].dpos
780			\|\| table68k[opcode].dmode != table68k[code].dmode))
781			{
782			mismatch++; continue;
783			}
784
785			if (code != opcode)
786			table68k[code].handler = opcode;
787			}
788			}
789			}
790
791			void do_merges (void)
792			{
793			long int opcode;
794			int nr = 0;
795			mismatch = 0;
796			for (opcode = 0; opcode < 65536; opcode++) {
797			if (table68k[opcode].handler != -1 \|\| table68k[opcode].mnemo == i_ILLG)
798			continue;
799			nr++;
800			handle_merges (opcode);
801			}
802			nr_cpuop_funcs = nr;
803			}
804
805			int get_no_mismatches (void)
806			{
807			return mismatch;
808			}