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gencpu.c
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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.
*
* Copyright 1995, 1996 Bernd Schmidt
*/
#include "sysconfig.h"
#include "sysdeps.h"
#include <ctype.h>
#include "config.h"
#include "options.h"
#include "readcpu.h"
#define BOOL_TYPE "int"
static long int counts[65536];
static int isspecific(int opcode)
{
return counts[opcode]>5;
}
static void read_counts(void)
{
FILE *file;
unsigned long opcode,count, total;
int trapcount=0;
int trap=0;
char name[20];
memset(counts, 0, sizeof counts);
file=fopen("insncount","r");
if(file)
{
fscanf(file,"Total: %lu\n",&total);
while(fscanf(file,"%lx: %lu %s\n",&opcode,&count,name)==3)
{
counts[opcode]=10000.0*count/total;
if(isspecific(opcode))
{
trapcount+=count;
trap++;
}
}
fclose(file);
#if 0
fprintf(stderr,"trap %d function: %f%\n",trap,100.0*trapcount/total);
#endif
}
}
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 int bit_size(int size)
{
switch(size) {
case sz_byte: return 8;
case sz_word: return 16;
case sz_long: return 32;
default:
abort();
}
return 0;
}
static const char *bit_mask(int size)
{
switch(size) {
case sz_byte: return "0xff";
case sz_word: return "0xffff";
case sz_long: return "0xffffffff";
default:
abort();
}
return 0;
}
static void genamode(amodes mode, char *reg, wordsizes size, char *name, int getv, int movem)
{
start_brace ();
switch(mode) {
case Dreg:
if (movem)
abort();
if (getv)
switch(size) {
case sz_byte:
#ifdef AMIGA
/* sam: I don't know why gcc.2.7.2.1 produces a code worse */
/* if it is not done like that: */
printf("\tBYTE %s = ((UBYTE*)&m68k_dreg(regs, %s))[3];\n", name, reg);
#else
printf("\tBYTE %s = m68k_dreg(regs, %s);\n", name, reg);
#endif
break;
case sz_word:
#ifdef AMIGA
printf("\tWORD %s = ((WORD*)&m68k_dreg(regs, %s))[1];\n", name, reg);
#else
printf("\tWORD %s = m68k_dreg(regs, %s);\n", name, reg);
#endif
break;
case sz_long:
printf("\tLONG %s = m68k_dreg(regs, %s);\n", name, reg);
break;
default: abort();
}
break;
case Areg:
if (movem)
abort();
if (getv)
switch(size) {
case sz_word:
printf("\tWORD %s = m68k_areg(regs, %s);\n", name, reg);
break;
case sz_long:
printf("\tLONG %s = m68k_areg(regs, %s);\n", name, reg);
break;
default: abort();
}
break;
case Aind:
printf("\tCPTR %sa = m68k_areg(regs, %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: abort();
}
break;
case Aipi:
printf("\tCPTR %sa = m68k_areg(regs, %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("\tm68k_areg(regs, %s) += areg_byteinc[%s];\n", reg, reg);
}
break;
case sz_word:
if (getv) printf("\tWORD %s = get_word(%sa);\n", name, name);
if (!movem) {
start_brace();
printf("\tm68k_areg(regs, %s) += 2;\n", reg);
}
break;
case sz_long:
if (getv) printf("\tLONG %s = get_long(%sa);\n", name, name);
if (!movem) {
start_brace();
printf("\tm68k_areg(regs, %s) += 4;\n", reg);
}
break;
default: abort();
}
break;
case Apdi:
switch(size) {
case sz_byte:
if (!movem) printf("\tm68k_areg(regs, %s) -= areg_byteinc[%s];\n", reg, reg);
start_brace();
printf("\tCPTR %sa = m68k_areg(regs, %s);\n", name, reg);
if (getv) printf("\tBYTE %s = get_byte(%sa);\n", name, name);
break;
case sz_word:
if (!movem) printf("\tm68k_areg(regs, %s) -= 2;\n", reg);
start_brace();
printf("\tCPTR %sa = m68k_areg(regs, %s);\n", name, reg);
if (getv) printf("\tWORD %s = get_word(%sa);\n", name, name);
break;
case sz_long:
if (!movem) printf("\tm68k_areg(regs, %s) -= 4;\n", reg);
start_brace();
printf("\tCPTR %sa = m68k_areg(regs, %s);\n", name, reg);
if (getv) printf("\tLONG %s = get_long(%sa);\n", name, name);
break;
default: abort();
}
break;
case Ad16:
printf("\tCPTR %sa = m68k_areg(regs, %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: abort();
}
break;
case Ad8r:
printf("\tCPTR %sa = get_disp_ea(m68k_areg(regs, %s));\n", name, reg);
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: abort();
}
}
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: abort();
}
}
break;
case PC8r:
printf("\tCPTR %sa = get_disp_ea(m68k_getpc());\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: abort();
}
}
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: abort();
}
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: abort();
}
break;
case imm:
if (getv)
switch(size) {
case sz_byte:
printf("\tBYTE %s = nextibyte();\n", name);
break;
case sz_word:
printf("\tWORD %s = nextiword();\n", name);
break;
case sz_long:
printf("\tLONG %s = nextilong();\n", name);
break;
default: abort();
}
break;
case imm0:
if (!getv) abort();
printf("\tBYTE %s = nextibyte();\n", name);
break;
case imm1:
if (!getv) abort();
printf("\tWORD %s = nextiword();\n", name);
break;
case imm2:
if (!getv) abort();
printf("\tLONG %s = nextilong();\n", name);
break;
case immi:
if (!getv) abort();
printf("\tULONG %s = %s;\n", name, reg);
break;
default:
abort();
}
}
static void genastore(char *from, amodes mode, char *reg, wordsizes size, char *to)
{
switch(mode) {
case Dreg:
switch(size) {
case sz_byte:
printf("\tm68k_dreg(regs, %s) = (m68k_dreg(regs, %s) & ~0xff) | ((%s) & 0xff);\n", reg, reg, from);
break;
case sz_word:
printf("\tm68k_dreg(regs, %s) = (m68k_dreg(regs, %s) & ~0xffff) | ((%s) & 0xffff);\n", reg, reg, from);
break;
case sz_long:
printf("\tm68k_dreg(regs, %s) = (%s);\n", reg, from);
break;
default: abort();
}
break;
case Areg:
switch(size) {
case sz_word:
fprintf(stderr, "Foo\n");
printf("\tm68k_areg(regs, %s) = (LONG)(WORD)(%s);\n", reg, from);
break;
case sz_long:
printf("\tm68k_areg(regs, %s) = (%s);\n", reg, from);
break;
default: abort();
}
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: abort();
}
break;
case PC16:
case PC8r:
switch(size) {
case sz_byte:
printf("\tput_byte(%sa,%s);\n", to, from);
break;
case sz_word:
if (CPU_LEVEL < 2)
abort();
printf("\tput_word(%sa,%s);\n", to, from);
break;
case sz_long:
if (CPU_LEVEL < 2)
abort();
printf("\tput_long(%sa,%s);\n", to, from);
break;
default: abort();
}
break;
case imm:
case imm0:
case imm1:
case imm2:
case immi:
abort();
break;
default:
abort();
}
}
static void genmovemel(UWORD opcode)
{
char getcode[100];
int size = table68k[opcode].size == sz_long ? 4 : 2;
if (table68k[opcode].size == sz_long) {
strcpy(getcode, "get_long(srca)");
} else {
strcpy(getcode, "(LONG)(WORD)get_word(srca)");
}
printf("\tUWORD mask = nextiword(), dmask = mask & 0xff, amask = (mask >> 8) & 0xff;\n");
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "src", 0, 1);
start_brace();
printf("\twhile (dmask) { m68k_dreg(regs, movem_index1[dmask]) = %s; srca += %d; dmask = movem_next[dmask]; }\n",
getcode, size);
printf("\twhile (amask) { m68k_areg(regs, movem_index1[amask]) = %s; srca += %d; amask = movem_next[amask]; }\n",
getcode, size);
if (table68k[opcode].dmode == Aipi)
printf("\tm68k_areg(regs, dstreg) = srca;\n");
}
static void genmovemle(UWORD opcode)
{
char putcode[100];
int size = table68k[opcode].size == sz_long ? 4 : 2;
if (table68k[opcode].size == sz_long) {
strcpy(putcode, "put_long(srca,");
} else {
strcpy(putcode, "put_word(srca,");
}
printf("\tUWORD mask = nextiword();\n");
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "src", 0, 1);
start_brace();
if (table68k[opcode].dmode == Apdi) {
printf("\tUWORD amask = mask & 0xff, dmask = (mask >> 8) & 0xff;\n");
printf("\twhile (amask) { srca -= %d; %s m68k_areg(regs, movem_index2[amask])); amask = movem_next[amask]; }\n",
size, putcode);
printf("\twhile (dmask) { srca -= %d; %s m68k_dreg(regs, movem_index2[dmask])); dmask = movem_next[dmask]; }\n",
size, putcode);
printf("\tm68k_areg(regs, dstreg) = srca;\n");
} else {
printf("\tUWORD dmask = mask & 0xff, amask = (mask >> 8) & 0xff;\n");
printf("\twhile (dmask) { %s m68k_dreg(regs, movem_index1[dmask])); srca += %d; dmask = movem_next[dmask]; }\n",
putcode, size);
printf("\twhile (amask) { %s m68k_areg(regs, movem_index1[amask])); srca += %d; amask = movem_next[amask]; }\n",
putcode, size);
}
}
typedef enum {
flag_logical, flag_add, flag_sub, flag_cmp, flag_addx, flag_subx, flag_zn,
flag_av, flag_sv
} flagtypes;
static void genflags_normal(flagtypes type, wordsizes size, char *value, char *src, char *dst)
{
char vstr[100],sstr[100],dstr[100];
char usstr[100],udstr[100];
char unsstr[100],undstr[100];
switch(size) {
case sz_byte:
strcpy(vstr, "((BYTE)(");
strcpy(usstr, "((UBYTE)(");
break;
case sz_word:
strcpy(vstr, "((WORD)(");
strcpy(usstr, "((UWORD)(");
break;
case sz_long:
strcpy(vstr, "((LONG)(");
strcpy(usstr, "((ULONG)(");
break;
default:
abort();
}
strcpy(unsstr, usstr);
strcpy(sstr, vstr);
strcpy(dstr, vstr);
strcat(vstr, value); strcat(vstr,"))");
strcat(dstr, dst); strcat(dstr,"))");
strcat(sstr, src); strcat(sstr,"))");
strcpy(udstr, usstr);
strcat(udstr, dst); strcat(udstr,"))");
strcat(usstr, src); strcat(usstr,"))");
strcpy(undstr, unsstr);
strcat(unsstr, "-");
strcat(undstr, "~");
strcat(undstr, dst); strcat(undstr,"))");
strcat(unsstr, src); strcat(unsstr,"))");
switch (type) {
case flag_logical:
case flag_zn:
case flag_av:
case flag_sv:
case flag_addx:
case flag_subx:
break;
case flag_add:
start_brace();
printf("ULONG %s = %s + %s;\n", value, dstr, sstr);
break;
case flag_sub:
case flag_cmp:
start_brace();
printf("ULONG %s = %s - %s;\n", value, dstr, sstr);
break;
}
switch (type) {
case flag_logical:
case flag_zn:
break;
case flag_add:
case flag_sub:
case flag_addx:
case flag_subx:
case flag_cmp:
case flag_av:
case flag_sv:
start_brace();
printf("\t"BOOL_TYPE" flgs = %s < 0;\n", sstr);
printf("\t"BOOL_TYPE" flgo = %s < 0;\n", dstr);
printf("\t"BOOL_TYPE" flgn = %s < 0;\n", vstr);
break;
}
switch(type) {
case flag_logical:
printf("\tVFLG = CFLG = 0;\n");
printf("\tZFLG = %s == 0;\n", vstr);
printf("\tNFLG = %s < 0;\n", vstr);
break;
case flag_av:
printf("\tVFLG = (flgs == flgo) && (flgn != flgo);\n");
break;
case flag_sv:
printf("\tVFLG = (flgs != flgo) && (flgn != flgo);\n");
break;
case flag_zn:
printf("\tif (%s != 0) ZFLG = 0;\n", vstr);
printf("\tNFLG = %s < 0;\n", vstr);
break;
case flag_add:
printf("\tZFLG = %s == 0;\n", vstr);
printf("\tVFLG = (flgs == flgo) && (flgn != flgo);\n");
printf("\tCFLG = XFLG = %s < %s;\n", undstr, usstr);
printf("\tNFLG = flgn != 0;\n");
break;
case flag_sub:
printf("\tZFLG = %s == 0;\n", vstr);
printf("\tVFLG = (flgs != flgo) && (flgn != flgo);\n");
printf("\tCFLG = XFLG = %s > %s;\n", usstr, udstr);
printf("\tNFLG = flgn != 0;\n");
break;
case flag_addx:
printf("\tVFLG = (flgs && flgo && !flgn) || (!flgs && !flgo && flgn);\n");
printf("\tXFLG = CFLG = (flgs && flgo) || (!flgn && (flgo || flgs));\n");
break;
case flag_subx:
printf("\tVFLG = (!flgs && flgo && !flgn) || (flgs && !flgo && flgn);\n");
printf("\tXFLG = CFLG = (flgs && !flgo) || (flgn && (!flgo || flgs));\n");
break;
case flag_cmp:
printf("\tZFLG = %s == 0;\n", vstr);
printf("\tVFLG = (flgs != flgo) && (flgn != flgo);\n");
printf("\tCFLG = %s > %s;\n", usstr, udstr);
printf("\tNFLG = flgn != 0;\n");
break;
}
}
static void genflags(flagtypes type, wordsizes size, char *value, char *src, char *dst)
{
#ifdef INTEL_FLAG_OPT
start_brace();
printf("\tULONG scratch = 0;\n");
switch (type) {
case flag_logical:
case flag_av:
case flag_sv:
case flag_zn:
case flag_addx:
case flag_subx:
case flag_cmp:
break;
case flag_add:
case flag_sub:
start_brace();
printf("\tULONG %s;\n", value);
break;
}
switch(type) {
case flag_av:
case flag_sv:
case flag_zn:
case flag_addx:
case flag_subx:
break;
case flag_logical:
if (strcmp(value, "0") == 0) {
printf("\t*(ULONG *)®flags = 64;\n");
} else {
switch(size) {
case sz_byte:
printf("\t__asm__ __volatile__(\"testb %%b1,%%b1\\n\\tpushfl\\n\\tpopl %%0\\n\\tmovl %%0,regflags\\n\""
": \"=r\" (scratch) : \"q\" (%s) :\"cc\");", value);
break;
case sz_word:
printf("\t__asm__ __volatile__(\"testw %%w1,%%w1\\n\\tpushfl\\n\\tpopl %%0\\n\\tmovl %%0,regflags\\n\""
": \"=r\" (scratch) : \"r\" (%s) : \"cc\");", value);
break;
case sz_long:
printf("\t__asm__ __volatile__(\"testl %%1,%%1\\n\\tpushfl\\n\\tpopl %%0\\n\\tmovl %%0,regflags\\n\""
": \"=r\" (scratch) : \"r\" (%s) : \"cc\");", value);
break;
}
}
return;
case flag_add:
switch (size) {
case sz_byte:
printf("\t__asm__ __volatile__(\"addb %%b3,%%b0\\n\\tpushfl\\n\\tpopl %%1\\n\\tmovl %%1,regflags\\n\\tmovl %%1,regflags+4\\n\""
": \"=&q\" (%s) : \"r\" (scratch), "
" \"0\" ((BYTE)(%s)), \"qm\" ((BYTE)(%s)) : \"cc\");",
value, src, dst);
break;
case sz_word:
printf("\t__asm__ __volatile__(\"addw %%w3,%%w0\\n\\tpushfl\\n\\tpopl %%1\\n\\tmovl %%1,regflags\\n\\tmovl %%1,regflags+4\\n\""
": \"=&r\" (%s) : \"r\" (scratch), "
" \"0\" ((WORD)(%s)), \"rmi\" ((WORD)(%s)) : \"cc\");",
value, src, dst);
break;
case sz_long:
printf("\t__asm__ __volatile__(\"addl %%3,%%0\\n\\tpushfl\\n\\tpopl %%1\\n\\tmovl %%1,regflags\\n\\tmovl %%1,regflags+4\\n\""
": \"=&r\" (%s) : \"r\" (scratch), "
" \"0\" ((LONG)(%s)), \"rmi\" ((LONG)(%s)) : \"cc\");",
value, src, dst);
break;
}
return;
case flag_sub:
switch (size) {
case sz_byte:
printf("\t__asm__ __volatile__(\"subb %%b2,%%b0\\n\\tpushfl\\n\\tpopl %%1\\n\\tmovl %%1,regflags\\n\\tmovl %%1,regflags+4\\n\""
": \"=&q\" (%s) : \"r\" (scratch), "
" \"qmi\" ((BYTE)(%s)), \"0\" ((BYTE)(%s)) : \"cc\");",
value, src, dst);
break;
case sz_word:
printf("\t__asm__ __volatile__(\"subw %%w2,%%w0\\n\\tpushfl\\n\\tpopl %%1\\n\\tmovl %%1,regflags\\n\\tmovl %%1,regflags+4\\n\""
": \"=&r\" (%s) : \"r\" (scratch), "
" \"rmi\" ((WORD)(%s)), \"0\" ((WORD)(%s)) : \"cc\");",
value, src, dst);
break;
case sz_long:
printf("\t__asm__ __volatile__(\"subl %%2,%%0\\n\\tpushfl\\n\\tpopl %%1\\n\\tmovl %%1,regflags\\n\\tmovl %%1,regflags+4\\n\""
": \"=&r\" (%s) : \"r\" (scratch), "
" \"rmi\" ((LONG)(%s)), \"0\" ((LONG)(%s)) : \"cc\");",
value, src, dst);
break;
}
return;
case flag_cmp:
switch (size) {
case sz_byte:
printf("\t__asm__ __volatile__(\"cmpb %%b1,%%b2\\n\\tpushfl\\n\\tpopl %%0\\n\\tmovl %%0,regflags\\n\""
": : \"r\" (scratch), "
" \"qmi\" ((BYTE)(%s)), \"q\" ((BYTE)(%s)) : \"cc\");",
src, dst);
break;
case sz_word:
printf("\t__asm__ __volatile__(\"cmpw %%w1,%%w2\\n\\tpushfl\\n\\tpopl %%0\\n\\tmovl %%0,regflags\\n\""
": : \"r\" (scratch), "
" \"rmi\" ((WORD)(%s)), \"r\" ((WORD)(%s)) : \"cc\");",
src, dst);
break;
case sz_long:
printf("\t__asm__ __volatile__(\"cmpl %%1,%%2\\n\\tpushfl\\n\\tpopl %%0\\n\\tmovl %%0,regflags\\n\""
": : \"r\" (scratch), "
" \"rmi\" ((LONG)(%s)), \"r\" ((LONG)(%s)) : \"cc\");",
src, dst);
break;
}
return;
}
#elif defined(M68K_FLAG_OPT)
/*
* sam: This is different from 0.6.3. Might be buggy!
*/
switch (type) {
case flag_logical:
case flag_av:
case flag_sv:
case flag_zn:
case flag_addx:
case flag_subx:
break;
case flag_add:
case flag_sub:
case flag_cmp:
start_brace();
printf("\tULONG %s;\n", value);
break;
}
switch(type) {
case flag_av:
case flag_sv:
case flag_zn:
case flag_addx:
case flag_subx:
/* normal code: genflags_normal() */
break;
case flag_logical:
if (strcmp(value, "0") == 0) {
/* v=c=n=0 z=1 */
printf("\t*(UWORD*)®flags = 4;\n");
} else {
printf("\t{\n");
switch(size) {
case sz_byte:
printf("\t__asm__(\"tstb %%0\\n\\tmovw ccr,_regflags\""
": "
": \"dmi\" ((BYTE)(%s)) : \"cc\");\n",value);
break;
case sz_word:
printf("\t__asm__(\"tstw %%0\\n\\tmovw ccr,_regflags\""
": "
": \"dmi\" ((WORD)(%s)) : \"cc\");\n",value);
break;
case sz_long:
printf("\t__asm__(\"tstl %%0\\n\\tmovw ccr,_regflags\""
": "
": \"dmi\" ((LONG)(%s)) : \"cc\");\n",value);
break;
}
printf("\t}\n");
}
return;
case flag_add:
printf("\t{UWORD ccr;\n");
switch (size) {
case sz_byte:
printf("\t__asm__(\"addb %%3,%%1\\n\\tmovw ccr,%%0\""
": \"=d\" (ccr), \"=&d\" ((BYTE)(%s))"
": \"1\" ((BYTE)(%s)), \"dmi\" ((BYTE)(%s)) : \"cc\");\n",
value, src, dst);
break;
case sz_word:
printf("\t__asm__(\"addw %%3,%%1\\n\\tmovw ccr,%%0\""
": \"=d\" (ccr), \"=&d\" ((WORD)(%s))"
": \"1\" ((WORD)(%s)), \"dmi\" ((WORD)(%s)) : \"cc\");\n",
value, src, dst);
break;
case sz_long:
printf("\t__asm__(\"addl %%3,%%1\\n\\tmovw ccr,%%0\""
": \"=d\" (ccr), \"=&d\" ((LONG)(%s))"
": \"1\" ((LONG)(%s)), \"dmi\" ((LONG)(%s)) : \"cc\");\n",
value, src, dst);
break;
}
printf("\t((UWORD*)®flags)[1] = ((UWORD*)®flags)[0] = ccr;}\n");
return;
case flag_sub:
printf("\t{UWORD ccr;\n");
switch (size) {
case sz_byte:
if(strcmp(dst,"0")!=0)
printf("\t__asm__(\"subb %%2,%%1\\n\\tmovw ccr,%%0\""
": \"=d\" (ccr), \"=&d\" ((BYTE)(%s)) "
": \"dmi\" ((BYTE)(%s)), \"1\" ((BYTE)(%s)) : \"cc\");\n",
value, src, dst);
else
printf("\t__asm__(\"negb %%1\\n\\tmovw ccr,%%0\""
": \"=d\" (ccr), \"=&d\" ((BYTE)(%s)) "
": \"1\" ((BYTE)(%s)) : \"cc\");\n",
value, src);
break;
case sz_word:
if(strcmp(dst,"0")!=0)
printf("\t__asm__(\"subw %%2,%%1\\n\\tmovw ccr,%%0\""
": \"=d\" (ccr), \"=&d\" ((WORD)(%s)) "
": \"dmi\" ((WORD)(%s)), \"1\" ((WORD)(%s)) : \"cc\");\n",
value, src, dst);
else
printf("\t__asm__(\"negw %%1\\n\\tmovw ccr,%%0\""
": \"=d\" (ccr), \"=&d\" ((WORD)(%s)) "
": \"1\" ((WORD)(%s)) : \"cc\");\n",
value, src);
break;
case sz_long:
if(strcmp(dst,"0")!=0)
printf("\t__asm__(\"subl %%2,%%1\\n\\tmovw ccr,%%0\""
": \"=d\" (ccr), \"=&d\" ((LONG)(%s)) "
": \"dmi\" ((LONG)(%s)), \"1\" ((LONG)(%s)) : \"cc\");\n",
value, src, dst);
else
printf("\t__asm__(\"negl %%1\\n\\tmovw ccr,%%0\""
": \"=d\" (ccr), \"=&d\" ((LONG)(%s)) "
": \"1\" ((LONG)(%s)) : \"cc\");\n",
value, src);
break;
}
printf("\t((UWORD*)®flags)[1] = ((UWORD*)®flags)[0] = ccr;}\n");
return;
case flag_cmp:
printf("\t{\n");
switch (size) {
case sz_byte:
printf("\t__asm__(\"cmpb %%0,%%1\\n\\tmovw ccr,_regflags\""
": "
": \"dmi\" ((BYTE)(%s)), \"d\" ((BYTE)(%s)) : \"cc\");\n",
src, dst);
break;
case sz_word:
printf("\t__asm__(\"cmpw %%0,%%1\\n\\tmovw ccr,_regflags\""
": "
": \"dmi\" ((WORD)(%s)), \"d\" ((WORD)(%s)) : \"cc\");\n",
src, dst);
break;
case sz_long:
printf("\t__asm__(\"cmpl %%0,%%1\\n\\tmovw ccr,_regflags\""
": "
": \"dmi\" ((LONG)(%s)), \"d\" ((LONG)(%s)) : \"cc\");\n",
src, dst);
break;
}
printf("\t}\n");
return;
}
#endif
genflags_normal(type, size, value, src, dst);
}
static void gen_opcode(unsigned long int opcode)
{
start_brace ();
switch (table68k[opcode].plev) {
case 0: /* not priviledged */
break;
case 1: /* unpriviledged only on 68000 */
if (CPU_LEVEL == 0)
break;
/* FALLTHROUGH */
case 2: /* priviledged */
#ifdef USE_POINTER
printf("if (!regs.s) { regs.pc_p -= 2; Exception(8,0); } else\n");
#else
printf("if (!regs.s) { regs.pc -= 2; Exception(8,0); } else\n");
#endif
start_brace();
break;
case 3: /* priviledged if size == word */
if (table68k[opcode].size == sz_byte)
break;
#ifdef USE_POINTER
printf("if (!regs.s) { regs.pc_p -= 2; Exception(8,0); } else\n");
#else
printf("if (!regs.s) { regs.pc -= 2; Exception(8,0); } else\n");
#endif
start_brace();
break;
}
switch(table68k[opcode].mnemo) {
case i_OR:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
printf("\tsrc |= dst;\n");
genflags(flag_logical, table68k[opcode].size, "src", "", "");
genastore("src", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_AND:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
printf("\tsrc &= dst;\n");
genflags(flag_logical, table68k[opcode].size, "src", "", "");
genastore("src", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_EOR:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
printf("\tsrc ^= dst;\n");
genflags(flag_logical, table68k[opcode].size, "src", "", "");
genastore("src", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_ORSR:
printf("\tMakeSR();\n");
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
if (table68k[opcode].size == sz_byte) {
printf("\tsrc &= 0xFF;\n");
}
printf("\tregs.sr |= src;\n");
printf("\tMakeFromSR();\n");
break;
case i_ANDSR:
printf("\tMakeSR();\n");
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
if (table68k[opcode].size == sz_byte) {
printf("\tsrc |= 0xFF00;\n");
}
printf("\tregs.sr &= src;\n");
printf("\tMakeFromSR();\n");
break;
case i_EORSR:
printf("\tMakeSR();\n");
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
if (table68k[opcode].size == sz_byte) {
printf("\tsrc &= 0xFF;\n");
}
printf("\tregs.sr ^= src;\n");
printf("\tMakeFromSR();\n");
break;
case i_SUB:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
start_brace ();
genflags(flag_sub, table68k[opcode].size, "newv", "src", "dst");
genastore("newv", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_SUBA:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", sz_long, "dst", 1, 0);
start_brace ();
printf("\tULONG newv = dst - src;\n");
genastore("newv", table68k[opcode].dmode, "dstreg", sz_long, "dst");
break;
case i_SUBX:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
start_brace ();
printf("\tULONG newv = dst - src - (XFLG ? 1 : 0);\n");
genflags(flag_subx, table68k[opcode].size, "newv", "src", "dst");