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gencpu.c
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/*
* UAE - The Un*x Amiga Emulator
*
* MC68000 emulation generator
*
* This is a fairly stupid program that generates a lot of case labels that
* can be #included in a switch statement.
* As an alternative, it can generate functions that handle specific
* MC68000 instructions, plus a prototype header file and a function pointer
* array to look up the function for an opcode.
* Error checking is bad, an illegal table68k file will cause the program to
* call abort().
* The generated code is sometimes sub-optimal, an optimizing compiler should
* take care of this.
*
* (c) 1995 Bernd Schmidt
*
*/
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include "config.h"
#include "amiga.h"
typedef enum {
Dreg, Areg, Aind, Aipi, Apdi, Ad16, Ad8r,
absw, absl, PC16, PC8r, imm, imm0, imm1, imm2, immi, am_unknown, am_illg
} amodes;
FILE *tablef;
int nextch = 0;
typedef enum {
i_ILLG,
i_OR, i_AND, i_EOR, i_ORSR, i_ANDSR, i_EORSR,
i_SUB, i_SUBA, i_SUBX, i_SBCD,
i_ADD, i_ADDA, i_ADDX, i_ABCD,
i_NEG, i_NEGX, i_NBCD, i_CLR, i_NOT, i_TST,
i_BTST, i_BCHG, i_BCLR, i_BSET,
i_CMP, i_CMPM, i_CMPA,
i_MOVEP, i_MOVE, i_MOVEA, i_MVSR2, i_MV2SR,
i_SWAP, i_EXG, i_EXT, i_MVMEL, i_MVMLE,
i_TRAP, i_MVR2USP, i_MVUSP2R, i_RESET, i_NOP, i_STOP, i_RTE, i_RTD,
i_LINK, i_UNLK,
i_RTS, i_TRAPV, i_RTR,
i_JSR, i_JMP, i_BSR, i_Bcc,
i_LEA, i_PEA, i_DBcc, i_Scc,
i_DIVU, i_DIVS, i_MULU, i_MULS,
i_ASR, i_ASL, i_LSR, i_LSL, i_ROL, i_ROR, i_ROXL, i_ROXR,
i_ASRW, i_ASLW, i_LSRW, i_LSLW, i_ROLW, i_RORW, i_ROXLW, i_ROXRW
} instrmnem;
struct mnemolookup {
instrmnem mnemo;
char name[10];
} lookuptab[] = {
{ i_OR, "OR" },
{ 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_MOVEP, "MOVEP" },
{ 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_RESET, "RESET" },
{ i_NOP, "NOP" },
{ i_STOP, "STOP" },
{ i_RTE, "RTE" },
{ i_RTD, "RTD" },
{ i_LINK, "LINK" },
{ i_UNLK, "UNLK" },
{ i_RTS, "RTS" },
{ 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" }
};
char patbits[16];
char opcstr[256];
UWORD bitmask,bitpattern;
typedef enum {
bit0, bit1, bitc, bitC, bitf, biti, bitI, bitj, bitJ, bits, bitS, bitd, bitD, bitr, bitR, bitz, lastbit
} bitvals;
typedef enum {
sz_unknown, sz_byte, sz_word, sz_long
} wordsizes;
struct instr {
instrmnem mnemo;
wordsizes size;
amodes dmode, smode;
unsigned char dreg;
unsigned char sreg;
unsigned int suse:1;
unsigned int duse:1;
unsigned int sbtarg:1;
unsigned int generated:1;
unsigned int cc:4;
signed char dpos;
signed char spos;
UWORD handler;
} *table;
#ifdef DEBUG
static void myabort(void)
{
abort();
}
#else
#define myabort abort
#endif
static void getnextch(void)
{
do {
nextch = fgetc(tablef);
if (nextch == '%') {
do {
nextch = fgetc(tablef);
} while (nextch != EOF && nextch != '\n');
}
} while (nextch != EOF && isspace(nextch));
}
static void get_bits(void)
{
int i;
bitmask = bitpattern = 0;
for(i=0; i<16; i++) {
bitmask <<= 1;
bitpattern <<= 1;
if (nextch == '0' || nextch == '1') bitmask |= 1;
if (nextch == '1') bitpattern |= 1;
patbits[i] = nextch;
getnextch();
}
}
static amodes mode_from_str(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;
myabort();
}
static 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;
}
}
myabort();
}
static void get_strs(void)
{
fgets(opcstr, 250, tablef);
getnextch();
}
static void parse_bits(void)
{
int find;
long int opc;
for(opc = 0; opc < 65536; opc ++) {
if ((opc & bitmask) == bitpattern) {
int bitcnt[lastbit];
int bitval[lastbit];
int bitpos[lastbit];
int i,j;
UWORD msk = 0x8000;
int pos = 0;
int mnp = 0;
char mnemonic[10] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
wordsizes sz = sz_unknown;
bool srcgather = false, dstgather = false;
bool usesrc = false, usedst = false;
bool srcbtarg = false;
int srcpos, dstpos;
amodes srcmode = am_unknown, destmode = am_unknown;
int srcreg, destreg;
for(i=0; i < lastbit; i++) bitcnt[i] = bitval[i] = 0;
for(j=0; j < 16; j++, msk >>= 1) {
bitvals currbit;
switch(patbits[j]) {
case '0': currbit = bit0; break;
case '1': currbit = bit1; break;
case 'c': currbit = bitc; break;
case 'C': currbit = bitC; break;
case 'f': currbit = bitf; break;
case 'i': currbit = biti; break;
case 'I': currbit = bitI; break;
case 'j': currbit = bitj; break;
case 'J': currbit = bitJ; break;
case 's': currbit = bits; break;
case 'S': currbit = bitS; break;
case 'd': currbit = bitd; break;
case 'D': currbit = bitD; break;
case 'r': currbit = bitr; break;
case 'R': currbit = bitR; break;
case 'z': currbit = bitz; break;
default: myabort();
}
bitpos[currbit] = 15 - j;
bitcnt[currbit]++;
bitval[currbit] = (bitval[currbit] << 1) | ((opc & msk) ? 1 : 0);
}
if (bitval[bitj] == 0) bitval[bitj] = 8;
/* first check whether this one does not match after all */
if (bitval[bitz] == 3) continue;
if (bitval[bitC] == 1) continue;
if (bitcnt[bitI] && bitval[bitI] == 0) 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];
while (isspace(opcstr[pos]) || opcstr[pos] == ':') pos++;
while (!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: myabort();
}
break;
default: myabort();
}
} else {
mnemonic[mnp] = opcstr[pos];
if(mnemonic[mnp] == 'f') {
switch(bitval[bitf]) {
case 0: mnemonic[mnp] = 'R'; break;
case 1: mnemonic[mnp] = 'L'; break;
default: myabort();
}
}
mnp++;
}
pos++;
}
/* now, we have read the mnemonic and the size */
while (isspace(opcstr[pos])) pos++;
/* A goto a day keeps the D******a away. */
if (opcstr[pos] == 0 || opcstr[pos] == ':') goto endofline;
/* parse the source address */
usesrc = true;
switch(opcstr[pos++]) {
case 'D':
srcmode = Dreg;
switch (opcstr[pos++]) {
case 'r': srcreg = bitval[bitr]; srcgather = true; srcpos = bitpos[bitr]; break;
case 'R': srcreg = bitval[bitR]; srcgather = true; srcpos = bitpos[bitR]; break;
default: myabort();
}
break;
case 'A':
srcmode = Areg;
switch (opcstr[pos++]) {
case 'r': srcreg = bitval[bitr]; srcgather = true; srcpos = bitpos[bitr]; break;
case 'R': srcreg = bitval[bitR]; srcgather = true; srcpos = bitpos[bitR]; break;
default: myabort();
}
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 = (LONG)(BYTE)bitval[biti]; srcbtarg = true; srcgather = true; srcpos = bitpos[biti]; break;
case 'j': srcmode = immi; srcreg = bitval[bitj]; break;
case 'J': srcmode = immi; srcreg = bitval[bitJ]; break;
default: myabort();
}
break;
case 'd':
srcreg = bitval[bitD];
srcmode = mode_from_mr(bitval[bitd],bitval[bitD]);
if (srcmode == am_illg) continue;
if (srcmode == Areg || srcmode == Dreg || srcmode == Aind
|| srcmode == Ad16 || srcmode == Ad8r || srcmode == Aipi
|| srcmode == Apdi)
{
srcgather = true; 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 (srcmode == Areg || srcmode == Dreg || srcmode == Aind
|| srcmode == Ad16 || srcmode == Ad8r || srcmode == Aipi
|| srcmode == Apdi)
{
srcgather = true; 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: myabort();
}
/* safety check - might have changed */
if (srcmode != Areg && srcmode != Dreg && srcmode != Aind
&& srcmode != Ad16 && srcmode != Ad8r && srcmode != Aipi
&& srcmode != Apdi && srcmode != immi)
{
srcgather = false;
}
if (srcmode == Areg && sz == sz_byte)
goto nomatch;
if (opcstr[pos] != ',') goto endofline;
pos++;
/* parse the destination address */
usedst = true;
switch(opcstr[pos++]) {
case 'D':
destmode = Dreg;
switch (opcstr[pos++]) {
case 'r': destreg = bitval[bitr]; dstgather = true; dstpos = bitpos[bitr]; break;
case 'R': destreg = bitval[bitR]; dstgather = true; dstpos = bitpos[bitR]; break;
default: myabort();
}
break;
case 'A':
destmode = Areg;
switch (opcstr[pos++]) {
case 'r': destreg = bitval[bitr]; dstgather = true; dstpos = bitpos[bitr]; break;
case 'R': destreg = bitval[bitR]; dstgather = true; dstpos = bitpos[bitR]; break;
default: myabort();
}
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 = (LONG)(BYTE)bitval[biti]; break;
case 'j': destmode = immi; destreg = bitval[bitj]; break;
case 'J': destmode = immi; destreg = bitval[bitJ]; break;
default: myabort();
}
break;
case 'd':
destreg = bitval[bitD];
destmode = mode_from_mr(bitval[bitd],bitval[bitD]);
if(destmode == am_illg) continue;
if (destmode == Areg || destmode == Dreg || destmode == Aind
|| destmode == Ad16 || destmode == Ad8r || destmode == Aipi
|| destmode == Apdi)
{
dstgather = true; 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 (destmode == Areg || destmode == Dreg || destmode == Aind
|| destmode == Ad16 || destmode == Ad8r || destmode == Aipi
|| destmode == Apdi)
{
dstgather = true; 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: myabort();
}
/* safety check - might have changed */
if (destmode != Areg && destmode != Dreg && destmode != Aind
&& destmode != Ad16 && destmode != Ad8r && destmode != Aipi
&& destmode != Apdi)
{
dstgather = false;
}
if (destmode == Areg && sz == sz_byte)
goto nomatch;
#if 0
if (sz == sz_byte && (destmode == Aipi || destmode == Apdi)) {
dstgather = false;
}
#endif
endofline:
/* now, we have a match */
if (table[opc].mnemo != i_ILLG)
fprintf(stderr, "Double match: %x: %s\n", opc, opcstr);
for(find = 0;; find++) {
if (strcmp(mnemonic, lookuptab[find].name) == 0) {
table[opc].mnemo = lookuptab[find].mnemo;
break;
}
if (strlen(lookuptab[find].name) == 0) myabort();
}
table[opc].cc = bitval[bitc];
if (table[opc].mnemo == i_BTST
|| table[opc].mnemo == i_BSET
|| table[opc].mnemo == i_BCLR
|| table[opc].mnemo == i_BCHG)
{
sz = destmode == Dreg ? sz_long : sz_byte;
}
table[opc].generated = false;
table[opc].size = sz;
table[opc].sreg = srcreg;
table[opc].dreg = destreg;
table[opc].smode = srcmode;
table[opc].dmode = destmode;
table[opc].spos = srcgather ? srcpos : -1;
table[opc].dpos = dstgather ? dstpos : -1;
table[opc].suse = usesrc;
table[opc].duse = usedst;
table[opc].sbtarg = srcbtarg;
nomatch:
/* FOO! */;
}
}
}
static int n_braces = 0;
static void start_brace(void)
{
n_braces++;
printf("{");
}
static void close_brace(void)
{
assert (n_braces > 0);
n_braces--;
printf("}");
}
static void finish_braces(void)
{
while (n_braces > 0)
close_brace();
}
static void pop_braces(int to)
{
while (n_braces > to)
close_brace();
}
static void genamode(amodes mode, char *reg, wordsizes size, char *name, bool getv, bool movem)
{
start_brace ();
switch(mode) {
case Dreg:
if (movem)
abort();
if (getv)
switch(size) {
case sz_byte:
printf("\tBYTE %s = regs.d[%s];\n", name, reg);
break;
case sz_word:
printf("\tWORD %s = regs.d[%s];\n", name, reg);
break;
case sz_long:
printf("\tLONG %s = regs.d[%s];\n", name, reg);
break;
default: myabort();
}
break;
case Areg:
if (movem)
abort();
if (getv)
switch(size) {
case sz_word:
printf("\tWORD %s = regs.a[%s];\n", name, reg);
break;
case sz_long:
printf("\tLONG %s = regs.a[%s];\n", name, reg);
break;
default: myabort();
}
break;
case Aind:
printf("\tCPTR %sa = regs.a[%s];\n", name, reg);
if (getv)
switch(size) {
case sz_byte:
printf("\tBYTE %s = get_byte(%sa);\n", name, name);
break;
case sz_word:
printf("\tWORD %s = get_word(%sa);\n", name, name);
break;
case sz_long:
printf("\tLONG %s = get_long(%sa);\n", name, name);
break;
default: myabort();
}
break;
case Aipi:
printf("\tCPTR %sa = regs.a[%s];\n", name, reg);
switch(size) {
case sz_byte:
if (getv) printf("\tBYTE %s = get_byte(%sa);\n", name, name);
if (!movem) {
start_brace();
printf("\tregs.a[%s] += (%s == 7) ? 2 : 1;\n", reg, reg);
}
break;
case sz_word:
if (getv) printf("\tWORD %s = get_word(%sa);\n", name, name);
if (!movem) {
start_brace();
printf("\tregs.a[%s] += 2;\n", reg);
}
break;
case sz_long:
if (getv) printf("\tLONG %s = get_long(%sa);\n", name, name);
if (!movem) {
start_brace();
printf("\tregs.a[%s] += 4;\n", reg);
}
break;
default: myabort();
}
break;
case Apdi:
switch(size) {
case sz_byte:
if (!movem) printf("\tregs.a[%s] -= (%s == 7) ? 2 : 1;\n", reg, reg);
start_brace();
printf("\tCPTR %sa = regs.a[%s];\n", name, reg);
if (getv) printf("\tBYTE %s = get_byte(%sa);\n", name, name);
break;
case sz_word:
if (!movem) printf("\tregs.a[%s] -= 2;\n", reg);
start_brace();
printf("\tCPTR %sa = regs.a[%s];\n", name, reg);
if (getv) printf("\tWORD %s = get_word(%sa);\n", name, name);
break;
case sz_long:
if (!movem) printf("\tregs.a[%s] -= 4;\n", reg);
start_brace();
printf("\tCPTR %sa = regs.a[%s];\n", name, reg);
if (getv) printf("\tLONG %s = get_long(%sa);\n", name, name);
break;
default: myabort();
}
break;
case Ad16:
printf("\tCPTR %sa = regs.a[%s] + (LONG)(WORD)nextiword();\n", name, reg);
if (getv)
switch(size) {
case sz_byte:
printf("\tBYTE %s = get_byte(%sa);\n", name, name);
break;
case sz_word:
printf("\tWORD %s = get_word(%sa);\n", name, name);
break;
case sz_long:
printf("\tLONG %s = get_long(%sa);\n", name, name);
break;
default: myabort();
}
break;
case Ad8r:
printf("\tCPTR %sa = regs.a[%s];\n", name, reg);
printf("\tUWORD %sdp = nextiword();\n", name);
printf("\t%sa += (LONG)(BYTE)(%sdp & 0xFF);\n", name, name);
start_brace();
printf("\tULONG %sdpr = %sdp & 0x8000 ? regs.a[(%sdp & 0x7000) >> 12] : regs.d[(%sdp & 0x7000) >> 12];\n", name, name, name, name);
printf("\tif (!(%sdp & 0x800)) %sdpr = (LONG)(WORD)%sdpr;\n", name, name, name);
printf("\t%sa += %sdpr;\n", name, name);
if (getv) {
start_brace();
switch(size) {
case sz_byte:
printf("\tBYTE %s = get_byte(%sa);\n", name, name);
break;
case sz_word:
printf("\tWORD %s = get_word(%sa);\n", name, name);
break;
case sz_long:
printf("\tLONG %s = get_long(%sa);\n", name, name);
break;
default: myabort();
}
}
break;
case PC16:
printf("\tCPTR %sa = m68k_getpc();\n", name);
printf("\t%sa += (LONG)(WORD)nextiword();\n", name);
if (getv) {
start_brace();
switch(size) {
case sz_byte:
printf("\tBYTE %s = get_byte(%sa);\n", name, name);
break;
case sz_word:
printf("\tWORD %s = get_word(%sa);\n", name, name);
break;
case sz_long:
printf("\tLONG %s = get_long(%sa);\n", name, name);
break;
default: myabort();
}
}
break;
case PC8r:
printf("\tCPTR %sa = m68k_getpc();\n", name);
printf("\tUWORD %sdp = nextiword();\n", name);
printf("\t%sa += (LONG)(BYTE)(%sdp & 0xFF);\n", name, name);
start_brace();
printf("\tULONG %sdpr = %sdp & 0x8000 ? regs.a[(%sdp & 0x7000) >> 12] : regs.d[(%sdp & 0x7000) >> 12];\n", name, name, name, name);
printf("\tif (!(%sdp & 0x800)) %sdpr = (LONG)(WORD)%sdpr;\n", name, name, name);
printf("\t%sa += %sdpr;\n", name, name);
if (getv) {
start_brace();
switch(size) {
case sz_byte:
printf("\tBYTE %s = get_byte(%sa);\n", name, name);
break;
case sz_word:
printf("\tWORD %s = get_word(%sa);\n", name, name);
break;
case sz_long:
printf("\tLONG %s = get_long(%sa);\n", name, name);
break;
default: myabort();
}
}
break;
case absw:
printf("\tCPTR %sa = (LONG)(WORD)nextiword();\n", name);
if (getv)
switch(size) {
case sz_byte:
printf("\tBYTE %s = get_byte(%sa);\n", name, name);
break;
case sz_word:
printf("\tWORD %s = get_word(%sa);\n", name, name);
break;
case sz_long:
printf("\tLONG %s = get_long(%sa);\n", name, name);
break;
default: myabort();
}
break;
case absl:
printf("\tCPTR %sa = nextilong();\n", name);
if (getv)
switch(size) {
case sz_byte:
printf("\tBYTE %s = get_byte(%sa);\n", name, name);
break;
case sz_word:
printf("\tWORD %s = get_word(%sa);\n", name, name);
break;
case sz_long:
printf("\tLONG %s = get_long(%sa);\n", name, name);
break;
default: myabort();
}
break;
case imm:
if (getv)
switch(size) {
case sz_byte:
printf("\tBYTE %s = nextiword();\n", name);
break;
case sz_word:
printf("\tWORD %s = nextiword();\n", name);
break;
case sz_long:
printf("\tLONG %s = nextilong();\n", name);
break;
default: myabort();
}
break;
case imm0:
if (!getv) myabort();
printf("\tBYTE %s = nextiword();\n", name);
break;
case imm1:
if (!getv) myabort();
printf("\tWORD %s = nextiword();\n", name);
break;
case imm2:
if (!getv) myabort();
printf("\tLONG %s = nextilong();\n", name);
break;
case immi:
if (!getv) myabort();
printf("\tULONG %s = %s;\n", name, reg);
break;
default:
myabort();
}
}
static void genastore(char *from, amodes mode, char *reg, wordsizes size, char *to)
{
switch(mode) {
case Dreg:
switch(size) {
case sz_byte:
printf("\tregs.d[%s] &= ~0xff; regs.d[%s] |= (%s) & 0xff;\n", reg, reg, from);
break;
case sz_word:
printf("\tregs.d[%s] &= ~0xffff; regs.d[%s] |= (%s) & 0xffff;\n", reg, reg, from);
break;
case sz_long:
printf("\tregs.d[%s] = (%s);\n", reg, from);
break;
default: myabort();
}
break;
case Areg:
switch(size) {
case sz_word:
printf("\tregs.a[%s] = (LONG)(WORD)(%s);\n", reg, from);
break;
case sz_long:
printf("\tregs.a[%s] = (%s);\n", reg, from);
break;
default: myabort();
}
break;
case Aind:
case Aipi:
case Apdi:
case Ad16:
case Ad8r:
case absw:
case absl:
switch(size) {
case sz_byte:
printf("\tput_byte(%sa,%s);\n", to, from);
break;
case sz_word:
printf("\tput_word(%sa,%s);\n", to, from);
break;
case sz_long:
printf("\tput_long(%sa,%s);\n", to, from);
break;
default: myabort();
}
break;
case PC16:
case PC8r: