Source to src/gencpu.c
/*
* 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.
*
* The source for the insn timings is Markt & Technik's Amiga Magazin 8/1992.
*
* Copyright 1995, 1996, 1997, 1998, 1999, 2000 Bernd Schmidt
*/
#include "sysconfig.h"
#include "sysdeps.h"
#include <ctype.h>
#include "readcpu.h"
#define BOOL_TYPE "int"
static FILE *headerfile;
static FILE *stblfile;
static int using_prefetch;
static int using_exception_3;
static int using_ce = 0;
static int cpu_level;
/* Flags for genamode. */
#define GF_APDI 1
#define GF_AD8R 2
#define GF_PC8R 4
#define GF_AA 7
#define GF_NOREFILL 8
#define GF_PREFETCH 16
/* For the current opcode, the next lower level that will have different code.
* Initialized to -1 for each opcode. If it remains unchanged, indicates we
* are done with that opcode. */
static int next_cpu_level;
static int *opcode_map;
static int *opcode_next_clev;
static int *opcode_last_postfix;
static unsigned long *counts;
static int generate_stbl;
static void read_counts (void)
{
FILE *file;
unsigned long opcode, count, total;
char name[20];
int nr = 0;
memset (counts, 0, 65536 * sizeof *counts);
file = fopen ("frequent.68k", "r");
if (file) {
fscanf (file, "Total: %lu\n", &total);
while (fscanf (file, "%lx: %lu %s\n", &opcode, &count, name) == 3) {
opcode_next_clev[nr] = 6;
opcode_last_postfix[nr] = -1;
opcode_map[nr++] = opcode;
counts[opcode] = count;
}
fclose (file);
}
if (nr == nr_cpuop_funcs)
return;
for (opcode = 0; opcode < 0x10000; opcode++) {
if (table68k[opcode].handler == -1 && table68k[opcode].mnemo != i_ILLG
&& counts[opcode] == 0)
{
opcode_next_clev[nr] = 6;
opcode_last_postfix[nr] = -1;
opcode_map[nr++] = opcode;
counts[opcode] = count;
}
}
if (nr != nr_cpuop_funcs)
abort ();
}
static char endlabelstr[80];
static int endlabelno = 0;
static int need_endlabel;
static int n_braces = 0;
static int m68k_pc_offset = 0;
static int insn_n_cycles;
static void returncycles (char *s, int cycles)
{
if (using_ce)
return;
printf ("%sreturn CYCLE_UNIT / 2 * %d;\n", s, cycles);
}
static void addcycles (int cycles)
{
if (using_ce)
printf ("\tdo_cycles_ce (%d * CYCLE_UNIT / 2);\n", cycles);
else
insn_n_cycles += cycles;
}
static void addcycles2 (char *s, int cycles)
{
if (using_ce)
printf ("%sdo_cycles_ce (%d * CYCLE_UNIT / 2);\n", s, cycles);
else
insn_n_cycles += cycles;
}
static void addcycles3 (char *s)
{
if (!using_ce) return;
printf ("%sif (cycles > 0) do_cycles_ce (cycles);\n", s);
}
static int isreg (amodes mode)
{
if (mode == Dreg || mode == Areg)
return 1;
return 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 gen_nextilong (char *type, char *name, int norefill)
{
int r = m68k_pc_offset;
m68k_pc_offset += 4;
if (using_ce) {
printf ("\t%s %s;\n", type, name);
/* we must do this because execution order of (something | something2) is not defined */
if (norefill) {
printf ("\t%s = get_word_ce_prefetch (%d) << 16;\n", name, r + 2);
printf ("\t%s |= regs.irc;\n", name);
} else {
printf ("\t%s = get_word_ce_prefetch (%d) << 16;\n", name, r + 2);
printf ("\t%s |= get_word_ce_prefetch (%d);\n", name, r + 4);
}
} else {
if (using_prefetch) {
if (norefill) {
printf ("\t%s %s;\n", type, name);
printf ("\t%s = get_word_prefetch (%d) << 16;\n", name, r + 2);
printf ("\t%s |= regs.irc;\n", name);
insn_n_cycles += 4;
} else
printf ("\t%s %s = get_long_prefetch (%d);\n", type, name, r + 2);
insn_n_cycles += 8;
} else {
insn_n_cycles += 8;
printf ("\t%s %s = get_ilong (%d);\n", type, name, r);
}
}
}
static const char *gen_nextiword (int norefill)
{
static char buffer[80];
int r = m68k_pc_offset;
m68k_pc_offset += 2;
if (using_ce) {
if (norefill)
strcpy (buffer, "regs.irc");
else
sprintf (buffer, "get_word_ce_prefetch (%d)", r + 2);
} else {
if (using_prefetch) {
if (norefill) {
sprintf (buffer, "regs.irc", r);
} else {
sprintf (buffer, "get_word_prefetch (%d)", r + 2);
insn_n_cycles += 4;
}
} else {
sprintf (buffer, "get_iword (%d)", r);
insn_n_cycles += 4;
}
}
return buffer;
}
static const char *gen_nextibyte (int norefill)
{
static char buffer[80];
int r = m68k_pc_offset;
m68k_pc_offset += 2;
if (using_ce) {
if (norefill)
strcpy (buffer, "(uae_u8)regs.irc");
else
sprintf (buffer, "(uae_u8)get_word_ce_prefetch (%d)", r + 2);
} else {
insn_n_cycles += 4;
if (using_prefetch) {
if (norefill) {
sprintf (buffer, "(uae_u8)regs.irc", r);
} else {
sprintf (buffer, "(uae_u8)get_word_prefetch (%d)", r + 2);
insn_n_cycles += 4;
}
} else {
sprintf (buffer, "get_ibyte (%d)", r);
insn_n_cycles += 4;
}
}
return buffer;
}
static void irc2ir (void)
{
if (!using_prefetch)
return;
printf ("\tregs.ir = regs.irc;\n");
}
static int did_prefetch;
static void fill_prefetch_2 (void)
{
if (!using_prefetch)
return;
if (using_ce)
printf ("\tget_word_ce_prefetch (%d);\n", m68k_pc_offset + 2);
else
printf ("\tget_word_prefetch (%d);\n", m68k_pc_offset + 2);
did_prefetch = 1;
insn_n_cycles += 4;
}
static void fill_prefetch_1 (int o)
{
if (!using_prefetch)
return;
if (using_ce) {
printf ("\tget_word_ce_prefetch (%d);\n", o);
} else {
printf ("\tget_word_prefetch (%d);\n", o);
}
did_prefetch = 1;
insn_n_cycles += 4;
}
static void fill_prefetch_full (void)
{
fill_prefetch_1 (0);
irc2ir ();
fill_prefetch_1 (2);
}
static void fill_prefetch_0 (void)
{
if (!using_prefetch)
return;
if (using_ce)
printf ("\tget_word_ce_prefetch (0);\n");
else
printf ("\tget_word_prefetch (0);\n");
did_prefetch = 1;
insn_n_cycles += 4;
}
static void fill_prefetch_next_1 (void)
{
irc2ir ();
fill_prefetch_1 (m68k_pc_offset + 2);
}
static void fill_prefetch_next (void)
{
fill_prefetch_next_1 ();
}
static void fill_prefetch_finish (void)
{
if (did_prefetch || !using_prefetch)
return;
fill_prefetch_1 (m68k_pc_offset);
}
static void sync_m68k_pc (void)
{
if (m68k_pc_offset == 0)
return;
printf ("\tm68k_incpc (%d);\n", m68k_pc_offset);
m68k_pc_offset = 0;
}
/* getv == 1: fetch data; getv != 0: check for odd address. If movem != 0,
* the calling routine handles Apdi and Aipi modes.
* gb-- movem == 2 means the same thing but for a MOVE16 instruction */
static void genamode (amodes mode, char *reg, wordsizes size, char *name, int getv, int movem, int flags)
{
char namea[100];
int m68k_pc_offset_last = m68k_pc_offset;
sprintf (namea, "%sa", name);
start_brace ();
switch (mode) {
case Dreg:
if (movem)
abort ();
if (getv == 1)
switch (size) {
case sz_byte:
#if defined(AMIGA) && !defined(WARPUP)
/* sam: I don't know why gcc.2.7.2.1 produces a code worse */
/* if it is not done like that: */
printf ("\tuae_s8 %s = ((uae_u8*)&m68k_dreg (regs, %s))[3];\n", name, reg);
#else
printf ("\tuae_s8 %s = m68k_dreg (regs, %s);\n", name, reg);
#endif
break;
case sz_word:
#if defined(AMIGA) && !defined(WARPUP)
printf ("\tuae_s16 %s = ((uae_s16*)&m68k_dreg (regs, %s))[1];\n", name, reg);
#else
printf ("\tuae_s16 %s = m68k_dreg (regs, %s);\n", name, reg);
#endif
break;
case sz_long:
printf ("\tuae_s32 %s = m68k_dreg (regs, %s);\n", name, reg);
break;
default:
abort ();
}
return;
case Areg:
if (movem)
abort ();
if (getv == 1)
switch (size) {
case sz_word:
printf ("\tuae_s16 %s = m68k_areg (regs, %s);\n", name, reg);
break;
case sz_long:
printf ("\tuae_s32 %s = m68k_areg (regs, %s);\n", name, reg);
break;
default:
abort ();
}
return;
case Aind:
printf ("\tuaecptr %sa = m68k_areg (regs, %s);\n", name, reg);
break;
case Aipi:
printf ("\tuaecptr %sa = m68k_areg (regs, %s);\n", name, reg);
break;
case Apdi:
switch (size) {
case sz_byte:
if (movem)
printf ("\tuaecptr %sa = m68k_areg (regs, %s);\n", name, reg);
else
printf ("\tuaecptr %sa = m68k_areg (regs, %s) - areg_byteinc[%s];\n", name, reg, reg);
break;
case sz_word:
printf ("\tuaecptr %sa = m68k_areg (regs, %s) - %d;\n", name, reg, movem ? 0 : 2);
break;
case sz_long:
printf ("\tuaecptr %sa = m68k_areg (regs, %s) - %d;\n", name, reg, movem ? 0 : 4);
break;
default:
abort ();
}
break;
if (!(flags & GF_APDI)) {
addcycles (2);
}
case Ad16:
printf ("\tuaecptr %sa = m68k_areg (regs, %s) + (uae_s32)(uae_s16)%s;\n", name, reg, gen_nextiword (flags & GF_NOREFILL));
break;
case Ad8r:
if (cpu_level > 1) {
if (next_cpu_level < 1)
next_cpu_level = 1;
sync_m68k_pc ();
start_brace ();
/* This would ordinarily be done in gen_nextiword, which we bypass. */
insn_n_cycles += 4;
printf ("\tuaecptr %sa = get_disp_ea_020(m68k_areg (regs, %s), next_iword());\n", name, reg);
} else
printf ("\tuaecptr %sa = get_disp_ea_000(m68k_areg (regs, %s), %s);\n", name, reg, gen_nextiword (flags & GF_NOREFILL));
if (!(flags & GF_AD8R)) {
addcycles (2);
}
break;
case PC16:
printf ("\tuaecptr %sa = m68k_getpc () + %d;\n", name, m68k_pc_offset);
printf ("\t%sa += (uae_s32)(uae_s16)%s;\n", name, gen_nextiword (flags & GF_NOREFILL));
break;
case PC8r:
if (cpu_level > 1) {
if (next_cpu_level < 1)
next_cpu_level = 1;
sync_m68k_pc ();
start_brace ();
/* This would ordinarily be done in gen_nextiword, which we bypass. */
insn_n_cycles += 4;
printf ("\tuaecptr tmppc = m68k_getpc ();\n");
printf ("\tuaecptr %sa = get_disp_ea_020(tmppc, next_iword());\n", name);
} else {
printf ("\tuaecptr tmppc = m68k_getpc () + %d;\n", m68k_pc_offset);
printf ("\tuaecptr %sa = get_disp_ea_000(tmppc, %s);\n", name, gen_nextiword (flags & GF_NOREFILL));
}
if (!(flags & GF_PC8R)) {
addcycles (2);
}
break;
case absw:
printf ("\tuaecptr %sa = (uae_s32)(uae_s16)%s;\n", name, gen_nextiword (flags & GF_NOREFILL));
break;
case absl:
gen_nextilong ("uaecptr", namea, flags & GF_NOREFILL);
break;
case imm:
if (getv != 1)
abort ();
switch (size) {
case sz_byte:
printf ("\tuae_s8 %s = %s;\n", name, gen_nextibyte (flags & GF_NOREFILL));
break;
case sz_word:
printf ("\tuae_s16 %s = %s;\n", name, gen_nextiword (flags & GF_NOREFILL));
break;
case sz_long:
gen_nextilong ("uae_s32", name, flags & GF_NOREFILL);
break;
default:
abort ();
}
return;
case imm0:
if (getv != 1)
abort ();
printf ("\tuae_s8 %s = %s;\n", name, gen_nextibyte (flags & GF_NOREFILL));
return;
case imm1:
if (getv != 1)
abort ();
printf ("\tuae_s16 %s = %s;\n", name, gen_nextiword (flags & GF_NOREFILL));
return;
case imm2:
if (getv != 1)
abort ();
gen_nextilong ("uae_s32", name, flags & GF_NOREFILL);
return;
case immi:
if (getv != 1)
abort ();
printf ("\tuae_u32 %s = %s;\n", name, reg);
return;
default:
abort ();
}
/* We get here for all non-reg non-immediate addressing modes to
* actually fetch the value. */
if (using_prefetch && using_exception_3 && getv != 0 && size != sz_byte) {
printf ("\tif (%sa & 1) {\n", name);
if (using_prefetch)
printf ("\t\texception3 (opcode, m68k_getpc () + %d, %sa);\n", m68k_pc_offset + 2, name);
else
printf ("\t\texception3 (opcode, m68k_getpc () + %d, %sa);\n", m68k_pc_offset_last, name);
printf ("\t\tgoto %s;\n", endlabelstr);
printf ("\t}\n");
need_endlabel = 1;
start_brace ();
}
if (flags & GF_PREFETCH)
fill_prefetch_next ();
if (getv == 1) {
switch (size) {
case sz_byte: insn_n_cycles += 4; break;
case sz_word: insn_n_cycles += 4; break;
case sz_long: insn_n_cycles += 8; break;
default: abort ();
}
start_brace ();
switch (size) {
case sz_byte: printf ("\tuae_s8 %s = get_byte (%sa);\n", name, name); break;
case sz_word: printf ("\tuae_s16 %s = get_word (%sa);\n", name, name); break;
case sz_long: printf ("\tuae_s32 %s = get_long (%sa);\n", name, name); break;
default: abort ();
}
}
/* We now might have to fix up the register for pre-dec or post-inc
* addressing modes. */
if (!movem)
switch (mode) {
case Aipi:
switch (size) {
case sz_byte:
printf ("\tm68k_areg (regs, %s) += areg_byteinc[%s];\n", reg, reg);
break;
case sz_word:
printf ("\tm68k_areg (regs, %s) += 2;\n", reg);
break;
case sz_long:
printf ("\tm68k_areg (regs, %s) += 4;\n", reg);
break;
default:
abort ();
}
break;
case Apdi:
printf ("\tm68k_areg (regs, %s) = %sa;\n", reg, name);
break;
default:
break;
}
}
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:
write_log ("Foo\n");
printf ("\tm68k_areg (regs, %s) = (uae_s32)(uae_s16)(%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:
case PC16:
case PC8r:
if (using_prefetch)
sync_m68k_pc ();
switch (size) {
case sz_byte:
insn_n_cycles += 4;
printf ("\tput_byte (%sa,%s);\n", to, from);
break;
case sz_word:
insn_n_cycles += 4;
if (cpu_level < 2 && (mode == PC16 || mode == PC8r))
abort ();
printf ("\tput_word (%sa,%s);\n", to, from);
break;
case sz_long:
insn_n_cycles += 8;
if (cpu_level < 2 && (mode == PC16 || mode == PC8r))
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 (uae_u16 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, "(uae_s32)(uae_s16)get_word (srca)");
}
printf ("\tuae_u16 mask = %s;\n", gen_nextiword (0));
printf ("\tunsigned int dmask = mask & 0xff, amask = (mask >> 8) & 0xff;\n");
genamode (table68k[opcode].dmode, "dstreg", table68k[opcode].size, "src", 2, 1, 0);
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 (uae_u16 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 ("\tuae_u16 mask = %s;\n", gen_nextiword (0));
genamode (table68k[opcode].dmode, "dstreg", table68k[opcode].size, "src", 2, 1, 0);
if (using_prefetch)
sync_m68k_pc ();
start_brace ();
if (table68k[opcode].dmode == Apdi) {
printf ("\tuae_u16 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 ("\tuae_u16 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);
}
}
static void duplicate_carry (int n)
{
while (n-- != 0)
printf ("\t");
printf ("COPY_CARRY;\n");
}
typedef enum
{
flag_logical_noclobber, 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, "((uae_s8)(");
strcpy (usstr, "((uae_u8)(");
break;
case sz_word:
strcpy (vstr, "((uae_s16)(");
strcpy (usstr, "((uae_u16)(");
break;
case sz_long:
strcpy (vstr, "((uae_s32)(");
strcpy (usstr, "((uae_u32)(");
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_noclobber:
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 ("uae_u32 %s = %s + %s;\n", value, dstr, sstr);
break;
case flag_sub:
case flag_cmp:
start_brace ();
printf ("uae_u32 %s = %s - %s;\n", value, dstr, sstr);
break;
}
switch (type) {
case flag_logical_noclobber:
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 ("\tCLEAR_CZNV;\n");
printf ("\tSET_ZFLG (%s == 0);\n", vstr);
printf ("\tSET_NFLG (%s < 0);\n", vstr);
break;
case flag_logical_noclobber:
printf ("\tSET_ZFLG (%s == 0);\n", vstr);
printf ("\tSET_NFLG (%s < 0);\n", vstr);
break;
case flag_av:
printf ("\tSET_VFLG ((flgs ^ flgn) & (flgo ^ flgn));\n");
break;
case flag_sv:
printf ("\tSET_VFLG ((flgs ^ flgo) & (flgn ^ flgo));\n");
break;
case flag_zn:
printf ("\tSET_ZFLG (GET_ZFLG & (%s == 0));\n", vstr);
printf ("\tSET_NFLG (%s < 0);\n", vstr);
break;
case flag_add:
printf ("\tSET_ZFLG (%s == 0);\n", vstr);
printf ("\tSET_VFLG ((flgs ^ flgn) & (flgo ^ flgn));\n");
printf ("\tSET_CFLG (%s < %s);\n", undstr, usstr);
duplicate_carry (0);
printf ("\tSET_NFLG (flgn != 0);\n");
break;
case flag_sub:
printf ("\tSET_ZFLG (%s == 0);\n", vstr);
printf ("\tSET_VFLG ((flgs ^ flgo) & (flgn ^ flgo));\n");
printf ("\tSET_CFLG (%s > %s);\n", usstr, udstr);
duplicate_carry (0);
printf ("\tSET_NFLG (flgn != 0);\n");
break;
case flag_addx:
printf ("\tSET_VFLG ((flgs ^ flgn) & (flgo ^ flgn));\n"); /* minterm SON: 0x42 */
printf ("\tSET_CFLG (flgs ^ ((flgs ^ flgo) & (flgo ^ flgn)));\n"); /* minterm SON: 0xD4 */
duplicate_carry (0);
break;
case flag_subx:
printf ("\tSET_VFLG ((flgs ^ flgo) & (flgo ^ flgn));\n"); /* minterm SON: 0x24 */
printf ("\tSET_CFLG (flgs ^ ((flgs ^ flgn) & (flgo ^ flgn)));\n"); /* minterm SON: 0xB2 */
duplicate_carry (0);
break;
case flag_cmp:
printf ("\tSET_ZFLG (%s == 0);\n", vstr);
printf ("\tSET_VFLG ((flgs != flgo) && (flgn != flgo));\n");
printf ("\tSET_CFLG (%s > %s);\n", usstr, udstr);
printf ("\tSET_NFLG (flgn != 0);\n");
break;
}
}
static void genflags (flagtypes type, wordsizes size, char *value, char *src, char *dst)
{
/* Temporarily deleted 68k/ARM flag optimizations. I'd prefer to have
them in the appropriate m68k.h files and use just one copy of this
code here. The API can be changed if necessary. */
#ifdef OPTIMIZED_FLAGS
switch (type) {
case flag_add:
case flag_sub:
start_brace ();
printf ("\tuae_u32 %s;\n", value);
break;
default:
break;
}
/* At least some of those casts are fairly important! */
switch (type) {
case flag_logical_noclobber:
printf ("\t{uae_u32 oldcznv = GET_CZNV & ~(FLAGVAL_Z | FLAGVAL_N);\n");
if (strcmp (value, "0") == 0) {
printf ("\tSET_CZNV (olcznv | FLAGVAL_Z);\n");
} else {
switch (size) {
case sz_byte: printf ("\toptflag_testb ((uae_s8)(%s));\n", value); break;
case sz_word: printf ("\toptflag_testw ((uae_s16)(%s));\n", value); break;
case sz_long: printf ("\toptflag_testl ((uae_s32)(%s));\n", value); break;
}
printf ("\tIOR_CZNV (oldcznv);\n");
}
printf ("\t}\n");
return;
case flag_logical:
if (strcmp (value, "0") == 0) {
printf ("\tSET_CZNV (FLAGVAL_Z);\n");
} else {
switch (size) {
case sz_byte: printf ("\toptflag_testb ((uae_s8)(%s));\n", value); break;
case sz_word: printf ("\toptflag_testw ((uae_s16)(%s));\n", value); break;
case sz_long: printf ("\toptflag_testl ((uae_s32)(%s));\n", value); break;
}
}
return;
case flag_add:
switch (size) {
case sz_byte: printf ("\toptflag_addb (%s, (uae_s8)(%s), (uae_s8)(%s));\n", value, src, dst); break;
case sz_word: printf ("\toptflag_addw (%s, (uae_s16)(%s), (uae_s16)(%s));\n", value, src, dst); break;
case sz_long: printf ("\toptflag_addl (%s, (uae_s32)(%s), (uae_s32)(%s));\n", value, src, dst); break;
}
return;
case flag_sub:
switch (size) {
case sz_byte: printf ("\toptflag_subb (%s, (uae_s8)(%s), (uae_s8)(%s));\n", value, src, dst); break;
case sz_word: printf ("\toptflag_subw (%s, (uae_s16)(%s), (uae_s16)(%s));\n", value, src, dst); break;
case sz_long: printf ("\toptflag_subl (%s, (uae_s32)(%s), (uae_s32)(%s));\n", value, src, dst); break;
}
return;
case flag_cmp:
switch (size) {
case sz_byte: printf ("\toptflag_cmpb ((uae_s8)(%s), (uae_s8)(%s));\n", src, dst); break;
case sz_word: printf ("\toptflag_cmpw ((uae_s16)(%s), (uae_s16)(%s));\n", src, dst); break;
case sz_long: printf ("\toptflag_cmpl ((uae_s32)(%s), (uae_s32)(%s));\n", src, dst); break;
}
return;
default:
break;
}
#endif
genflags_normal (type, size, value, src, dst);
}
static void force_range_for_rox (const char *var, wordsizes size)
{
/* Could do a modulo operation here... which one is faster? */
switch (size) {
case sz_long:
printf ("\tif (%s >= 33) %s -= 33;\n", var, var);
break;
case sz_word:
printf ("\tif (%s >= 34) %s -= 34;\n", var, var);
printf ("\tif (%s >= 17) %s -= 17;\n", var, var);
break;
case sz_byte:
printf ("\tif (%s >= 36) %s -= 36;\n", var, var);
printf ("\tif (%s >= 18) %s -= 18;\n", var, var);
printf ("\tif (%s >= 9) %s -= 9;\n", var, var);
break;
}
}
static const char *cmask (wordsizes size)
{
switch (size) {
case sz_byte: return "0x80";
case sz_word: return "0x8000";
case sz_long: return "0x80000000";
default: abort ();
}
}
static int source_is_imm1_8 (struct instr *i)
{
return i->stype == 3;
}
static void gen_opcode (unsigned long int opcode)
{
struct instr *curi = table68k + opcode;
insn_n_cycles = using_prefetch ? 0 : 4;
start_brace ();
#if 0
printf ("uae_u8 *m68k_pc = regs.pc_p;\n");
#endif
m68k_pc_offset = 2;
switch (curi->plev) {
case 0: /* not privileged */
break;
case 1: /* unprivileged only on 68000 */
if (cpu_level == 0)
break;
if (next_cpu_level < 0)
next_cpu_level = 0;
/* fall through */
case 2: /* priviledged */
printf ("if (!regs.s) { Exception(8,0); goto %s; }\n", endlabelstr);
need_endlabel = 1;
start_brace ();
break;
case 3: /* privileged if size == word */
if (curi->size == sz_byte)
break;
printf ("if (!regs.s) { Exception(8,0); goto %s; }\n", endlabelstr);
need_endlabel = 1;
start_brace ();
break;
}
switch (curi->mnemo) {
case i_OR:
case i_AND:
case i_EOR:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0, 0);
printf ("\tsrc %c= dst;\n", curi->mnemo == i_OR ? '|' : curi->mnemo == i_AND ? '&' : '^');
genflags (flag_logical, curi->size, "src", "", "");
if (curi->size == sz_long && isreg (curi->dmode))
addcycles (curi->mnemo == i_AND ? 2 : 4);
fill_prefetch_next ();
genastore ("src", curi->dmode, "dstreg", curi->size, "dst");
break;
case i_ORSR:
case i_EORSR:
printf ("\tMakeSR();\n");
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
if (curi->size == sz_byte) {
printf ("\tsrc &= 0xFF;\n");
}
addcycles (4);
fill_prefetch_next ();
printf ("\tregs.sr %c= src;\n", curi->mnemo == i_EORSR ? '^' : '|');
printf ("\tMakeFromSR();\n");
break;
case i_ANDSR:
printf ("\tMakeSR();\n");
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
if (curi->size == sz_byte) {
printf ("\tsrc |= 0xFF00;\n");
}
addcycles (4);
fill_prefetch_next ();
printf ("\tregs.sr &= src;\n");
printf ("\tMakeFromSR();\n");
break;
case i_SUB:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0, 0);
if (isreg (curi->dmode)) {
if (curi->dmode == Dreg && curi->size == sz_long)
addcycles ((curi->smode == imm || curi->smode == immi) ? 4 : 2);
}
fill_prefetch_next ();
start_brace ();
genflags (flag_sub, curi->size, "newv", "src", "dst");
genastore ("newv", curi->dmode, "dstreg", curi->size, "dst");
break;
case i_SUBA:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
genamode (curi->dmode, "dstreg", sz_long, "dst", 1, 0, 0);
if (isreg (curi->dmode) && curi->dmode == Areg) {
int tmpc = curi->size == sz_long ? 2 : 4;
if (curi->size == sz_long)
tmpc += (isreg (curi->smode) || curi->smode == imm) ? 2 : 0;
addcycles (tmpc);
}
fill_prefetch_next ();
start_brace ();
printf ("\tuae_u32 newv = dst - src;\n");
genastore ("newv", curi->dmode, "dstreg", sz_long, "dst");
break;
case i_SUBX:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, GF_AA);
genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0, GF_AA);
if ((isreg (curi->smode) && curi->size == sz_long) || !isreg (curi->smode))
addcycles (2);
fill_prefetch_next ();
start_brace ();
printf ("\tuae_u32 newv = dst - src - (GET_XFLG ? 1 : 0);\n");
genflags (flag_subx, curi->size, "newv", "src", "dst");
genflags (flag_zn, curi->size, "newv", "", "");
genastore ("newv", curi->dmode, "dstreg", curi->size, "dst");
break;
case i_SBCD:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, GF_AA);
genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0, GF_AA);
fill_prefetch_next ();
start_brace ();
printf ("\tuae_u16 newv_lo = (dst & 0xF) - (src & 0xF) - (GET_XFLG ? 1 : 0);\n");
printf ("\tuae_u16 newv_hi = (dst & 0xF0) - (src & 0xF0);\n");
printf ("\tuae_u16 newv, tmp_newv;\n");
printf ("\tint bcd = 0;\n");
printf ("\tnewv = tmp_newv = newv_hi + newv_lo;\n");
printf ("\tif (newv_lo & 0xF0) { newv -= 6; bcd = 6; };\n");
printf ("\tif ((((dst & 0xFF) - (src & 0xFF) - (GET_XFLG ? 1 : 0)) & 0x100) > 0xFF) { newv -= 0x60; }\n");
printf ("\tSET_CFLG ((((dst & 0xFF) - (src & 0xFF) - bcd - (GET_XFLG ? 1 : 0)) & 0x300) > 0xFF);\n");
duplicate_carry (0);
genflags (flag_zn, curi->size, "newv", "", "");
printf ("\tSET_VFLG ((tmp_newv & 0x80) != 0 && (newv & 0x80) == 0);\n");
genastore ("newv", curi->dmode, "dstreg", curi->size, "dst");
break;
case i_ADD:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0, 0);
if (isreg (curi->dmode)) {
if (curi->dmode == Dreg && curi->size == sz_long)
addcycles ((curi->smode == imm || curi->smode == immi) ? 4 : 2);
}
fill_prefetch_next ();
start_brace ();
genflags (flag_add, curi->size, "newv", "src", "dst");
genastore ("newv", curi->dmode, "dstreg", curi->size, "dst");
break;
case i_ADDA:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
genamode (curi->dmode, "dstreg", sz_long, "dst", 1, 0, 0);
if (isreg (curi->dmode) && curi->dmode == Areg) {
int tmpc = curi->size == sz_long ? 2 : 4;
if (curi->size == sz_long)
tmpc += (isreg (curi->smode) || curi->smode == imm) ? 2 : 0;
addcycles (tmpc);
}
fill_prefetch_next ();
start_brace ();
printf ("\tuae_u32 newv = dst + src;\n");
genastore ("newv", curi->dmode, "dstreg", sz_long, "dst");
break;
case i_ADDX:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, GF_AA);
genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0, GF_AA);
if ((isreg (curi->smode) && curi->size == sz_long) || !isreg (curi->smode))
addcycles (2);
fill_prefetch_next ();
start_brace ();
printf ("\tuae_u32 newv = dst + src + (GET_XFLG ? 1 : 0);\n");
genflags (flag_addx, curi->size, "newv", "src", "dst");
genflags (flag_zn, curi->size, "newv", "", "");
genastore ("newv", curi->dmode, "dstreg", curi->size, "dst");
break;
case i_ABCD:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, GF_AA);
genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0, GF_AA);
fill_prefetch_next ();
start_brace ();
printf ("\tuae_u16 newv_lo = (src & 0xF) + (dst & 0xF) + (GET_XFLG ? 1 : 0);\n");
printf ("\tuae_u16 newv_hi = (src & 0xF0) + (dst & 0xF0);\n");
printf ("\tuae_u16 newv, tmp_newv;\n");
printf ("\tint cflg;\n");
printf ("\tnewv = tmp_newv = newv_hi + newv_lo;");
printf ("\tif (newv_lo > 9) { newv += 6; }\n");
printf ("\tcflg = (newv & 0x3F0) > 0x90;\n");
printf ("\tif (cflg) newv += 0x60;\n");
printf ("\tSET_CFLG (cflg);\n");
duplicate_carry (0);
genflags (flag_zn, curi->size, "newv", "", "");
printf ("\tSET_VFLG ((tmp_newv & 0x80) == 0 && (newv & 0x80) != 0);\n");
genastore ("newv", curi->dmode, "dstreg", curi->size, "dst");
break;
case i_NEG:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
if (isreg (curi->smode) && curi->size == sz_long)
addcycles (2);
fill_prefetch_next ();
start_brace ();
genflags (flag_sub, curi->size, "dst", "src", "0");
genastore ("dst", curi->smode, "srcreg", curi->size, "src");
break;
case i_NEGX:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
if (isreg (curi->smode) && curi->size == sz_long)
addcycles (2);
fill_prefetch_next ();
start_brace ();
printf ("\tuae_u32 newv = 0 - src - (GET_XFLG ? 1 : 0);\n");
genflags (flag_subx, curi->size, "newv", "src", "0");
genflags (flag_zn, curi->size, "newv", "", "");
genastore ("newv", curi->smode, "srcreg", curi->size, "src");
break;
case i_NBCD:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
if (isreg (curi->smode))
addcycles (2);
fill_prefetch_next ();
start_brace ();
printf ("\tuae_u16 newv_lo = - (src & 0xF) - (GET_XFLG ? 1 : 0);\n");
printf ("\tuae_u16 newv_hi = - (src & 0xF0);\n");
printf ("\tuae_u16 newv;\n");
printf ("\tint cflg;\n");
printf ("\tif (newv_lo > 9) { newv_lo -= 6; }\n");
printf ("\tnewv = newv_hi + newv_lo;");
printf ("\tcflg = (newv & 0x1F0) > 0x90;\n");
printf ("\tif (cflg) newv -= 0x60;\n");
printf ("\tSET_CFLG (cflg);\n");
duplicate_carry (0);
genflags (flag_zn, curi->size, "newv", "", "");
genastore ("newv", curi->smode, "srcreg", curi->size, "src");
break;
case i_CLR:
genamode (curi->smode, "srcreg", curi->size, "src", cpu_level == 0 ? 1 : 2, 0, 0);
if (isreg (curi->smode) && curi->size == sz_long)
addcycles (2);
fill_prefetch_next ();
genflags (flag_logical, curi->size, "0", "", "");
genastore ("0", curi->smode, "srcreg", curi->size, "src");
break;
case i_NOT:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
if (isreg (curi->smode) && curi->size == sz_long)
addcycles (2);
fill_prefetch_next ();
start_brace ();
printf ("\tuae_u32 dst = ~src;\n");
genflags (flag_logical, curi->size, "dst", "", "");
genastore ("dst", curi->smode, "srcreg", curi->size, "src");
break;
case i_TST:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
fill_prefetch_next ();
genflags (flag_logical, curi->size, "src", "", "");
break;
case i_BTST:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0, 0);
if (isreg (curi->dmode))
addcycles (2);
fill_prefetch_next ();
if (curi->size == sz_byte)
printf ("\tsrc &= 7;\n");
else
printf ("\tsrc &= 31;\n");
printf ("\tSET_ZFLG (1 ^ ((dst >> src) & 1));\n");
break;
case i_BCHG:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0, 0);
if (isreg (curi->dmode))
addcycles (4);
fill_prefetch_next ();
if (curi->size == sz_byte)
printf ("\tsrc &= 7;\n");
else
printf ("\tsrc &= 31;\n");
printf ("\tdst ^= (1 << src);\n");
printf ("\tSET_ZFLG (((uae_u32)dst & (1 << src)) >> src);\n");
genastore ("dst", curi->dmode, "dstreg", curi->size, "dst");
break;
case i_BCLR:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0, 0);
if (isreg (curi->dmode))
addcycles (4);
fill_prefetch_next ();
if (curi->size == sz_byte)
printf ("\tsrc &= 7;\n");
else
printf ("\tsrc &= 31;\n");
printf ("\tSET_ZFLG (1 ^ ((dst >> src) & 1));\n");
printf ("\tdst &= ~(1 << src);\n");
genastore ("dst", curi->dmode, "dstreg", curi->size, "dst");
break;
case i_BSET:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0, 0);
if (isreg (curi->dmode))
addcycles (4);
fill_prefetch_next ();
if (curi->size == sz_byte)
printf ("\tsrc &= 7;\n");
else
printf ("\tsrc &= 31;\n");
printf ("\tSET_ZFLG (1 ^ ((dst >> src) & 1));\n");
printf ("\tdst |= (1 << src);\n");
genastore ("dst", curi->dmode, "dstreg", curi->size, "dst");
break;
case i_CMPM:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, GF_AA);
genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0, GF_AA);
fill_prefetch_next ();
start_brace ();
genflags (flag_cmp, curi->size, "newv", "src", "dst");
break;
case i_CMP:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0, 0);
if (isreg (curi->dmode)) {
if (curi->dmode == Areg || (curi->dmode == Dreg && curi->size == sz_long))
addcycles (2);
}
fill_prefetch_next ();
start_brace ();
genflags (flag_cmp, curi->size, "newv", "src", "dst");
break;
case i_CMPA:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
genamode (curi->dmode, "dstreg", sz_long, "dst", 1, 0, 0);
if (isreg (curi->dmode)) {
if (curi->dmode == Areg || (curi->dmode == Dreg && curi->size == sz_long))
addcycles (2);
}
fill_prefetch_next ();
start_brace ();
genflags (flag_cmp, sz_long, "newv", "src", "dst");
break;
/* The next two are coded a little unconventional, but they are doing
* weird things... */
case i_MVPRM:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
printf ("\tuaecptr memp = m68k_areg (regs, dstreg) + (uae_s32)(uae_s16)%s;\n", gen_nextiword (0));
fill_prefetch_next ();
if (curi->size == sz_word) {
printf ("\tput_byte (memp, src >> 8); put_byte (memp + 2, src);\n");
} else {
printf ("\tput_byte (memp, src >> 24); put_byte (memp + 2, src >> 16);\n");
printf ("\tput_byte (memp + 4, src >> 8); put_byte (memp + 6, src);\n");
}
break;
case i_MVPMR:
printf ("\tuaecptr memp = m68k_areg (regs, srcreg) + (uae_s32)(uae_s16)%s;\n", gen_nextiword (0));
genamode (curi->dmode, "dstreg", curi->size, "dst", 2, 0, 0);
if (curi->size == sz_word) {
printf ("\tuae_u16 val = (get_byte (memp) << 8) + get_byte (memp + 2);\n");
} else {
printf ("\tuae_u32 val = (get_byte (memp) << 24) + (get_byte (memp + 2) << 16)\n");
printf (" + (get_byte (memp + 4) << 8) + get_byte (memp + 6);\n");
}
fill_prefetch_next ();
genastore ("val", curi->dmode, "dstreg", curi->size, "dst");
break;
case i_MOVE:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "dst", 2, 0, GF_APDI);
genastore ("src", curi->dmode, "dstreg", curi->size, "dst");
genflags (flag_logical, curi->size, "src", "", "");
sync_m68k_pc ();
fill_prefetch_next ();
break;
case i_MOVEA:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "dst", 2, 0, GF_APDI);
if (curi->size == sz_word) {
printf ("\tuae_u32 val = (uae_s32)(uae_s16)src;\n");
} else {
printf ("\tuae_u32 val = src;\n");
}
fill_prefetch_next ();
genastore ("val", curi->dmode, "dstreg", sz_long, "dst");
break;
case i_MVSR2:
genamode (curi->smode, "srcreg", sz_word, "src", 2, 0, 0);
if (isreg (curi->smode))
addcycles (2);
fill_prefetch_next ();
printf ("\tMakeSR();\n");
if (curi->size == sz_byte)
genastore ("regs.sr & 0xff", curi->smode, "srcreg", sz_word, "src");
else
genastore ("regs.sr", curi->smode, "srcreg", sz_word, "src");
break;
case i_MV2SR:
genamode (curi->smode, "srcreg", sz_word, "src", 1, 0, 0);
if (curi->size == sz_byte) {
addcycles (8);
printf ("\tMakeSR ();\n\tregs.sr &= 0xFF00;\n\tregs.sr |= src & 0xFF;\n");
} else {
addcycles (4);
printf ("\tregs.sr = src;\n");
}
fill_prefetch_next ();
printf ("\tMakeFromSR ();\n");
break;
case i_SWAP:
genamode (curi->smode, "srcreg", sz_long, "src", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
printf ("\tuae_u32 dst = ((src >> 16)&0xFFFF) | ((src&0xFFFF)<<16);\n");
genflags (flag_logical, sz_long, "dst", "", "");
genastore ("dst", curi->smode, "srcreg", sz_long, "src");
break;
case i_EXG:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0, 0);
addcycles (2);
fill_prefetch_next ();
genastore ("dst", curi->smode, "srcreg", curi->size, "src");
genastore ("src", curi->dmode, "dstreg", curi->size, "dst");
break;
case i_EXT:
genamode (curi->smode, "srcreg", sz_long, "src", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
switch (curi->size) {
case sz_byte: printf ("\tuae_u32 dst = (uae_s32)(uae_s8)src;\n"); break;
case sz_word: printf ("\tuae_u16 dst = (uae_s16)(uae_s8)src;\n"); break;
case sz_long: printf ("\tuae_u32 dst = (uae_s32)(uae_s16)src;\n"); break;
default: abort ();
}
genflags (flag_logical,
curi->size == sz_word ? sz_word : sz_long, "dst", "", "");
genastore ("dst", curi->smode, "srcreg",
curi->size == sz_word ? sz_word : sz_long, "src");
break;
case i_MVMEL:
genmovemel (opcode);
fill_prefetch_next ();
break;
case i_MVMLE:
genmovemle (opcode);
fill_prefetch_next ();
break;
case i_TRAP:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
sync_m68k_pc ();
printf ("\tException(src+32,0);\n");
did_prefetch = 1;
m68k_pc_offset = 0;
break;
case i_MVR2USP:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
fill_prefetch_next ();
printf ("\tregs.usp = src;\n");
break;
case i_MVUSP2R:
genamode (curi->smode, "srcreg", curi->size, "src", 2, 0, 0);
fill_prefetch_next ();
genastore ("regs.usp", curi->smode, "srcreg", curi->size, "src");
break;
case i_RESET:
fill_prefetch_next ();
printf ("\tcpureset();\n");
break;
case i_NOP:
fill_prefetch_next ();
break;
case i_STOP:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
printf ("\tregs.sr = src;\n");
printf ("\tMakeFromSR();\n");
printf ("\tm68k_setstopped(1);\n");
sync_m68k_pc ();
fill_prefetch_full ();
break;
case i_RTE:
if (cpu_level == 0) {
genamode (Aipi, "7", sz_word, "sr", 1, 0, GF_NOREFILL);
genamode (Aipi, "7", sz_long, "pc", 1, 0, GF_NOREFILL);
printf ("\tregs.sr = sr; m68k_setpc (pc);\n");
printf ("\tMakeFromSR();\n");
} else {
int old_brace_level = n_braces;
if (next_cpu_level < 0)
next_cpu_level = 0;
printf ("\tuae_u16 newsr; uae_u32 newpc; for (;;) {\n");
genamode (Aipi, "7", sz_word, "sr", 1, 0, 0);
genamode (Aipi, "7", sz_long, "pc", 1, 0, 0);
genamode (Aipi, "7", sz_word, "format", 1, 0, 0);
printf ("\tnewsr = sr; newpc = pc;\n");
printf ("\tif ((format & 0xF000) == 0x0000) { break; }\n");
printf ("\telse if ((format & 0xF000) == 0x1000) { ; }\n");
printf ("\telse if ((format & 0xF000) == 0x2000) { m68k_areg (regs, 7) += 4; break; }\n");
printf ("\telse if ((format & 0xF000) == 0x7000) { m68k_areg (regs, 7) += 52; break; }\n");
printf ("\telse if ((format & 0xF000) == 0x8000) { m68k_areg (regs, 7) += 50; break; }\n");
printf ("\telse if ((format & 0xF000) == 0x9000) { m68k_areg (regs, 7) += 12; break; }\n");
printf ("\telse if ((format & 0xF000) == 0xa000) { m68k_areg (regs, 7) += 24; break; }\n");
printf ("\telse if ((format & 0xF000) == 0xb000) { m68k_areg (regs, 7) += 84; break; }\n");
printf ("\telse { Exception(14,0); goto %s; }\n", endlabelstr);
printf ("\tregs.sr = newsr; MakeFromSR();\n}\n");
pop_braces (old_brace_level);
printf ("\tregs.sr = newsr; MakeFromSR();\n");
printf ("\tif (newpc & 1)\n");
printf ("\t\texception3 (0x%04.4X, m68k_getpc (), newpc);\n", opcode);
printf ("\telse\n");
printf ("\t\tm68k_setpc (newpc);\n");
need_endlabel = 1;
}
/* PC is set and prefetch filled. */
m68k_pc_offset = 0;
fill_prefetch_full ();
break;
case i_RTD:
genamode (Aipi, "7", sz_long, "pc", 1, 0, 0);
genamode (curi->smode, "srcreg", curi->size, "offs", 1, 0, 0);
printf ("\tm68k_areg (regs, 7) += offs;\n");
printf ("\tif (pc & 1)\n");
printf ("\t\texception3 (0x%04.4X, m68k_getpc (), pc);\n", opcode);
printf ("\telse\n");
printf ("\t\tm68k_setpc (pc);\n");
/* PC is set and prefetch filled. */
m68k_pc_offset = 0;
fill_prefetch_full ();
break;
case i_LINK:
genamode (Apdi, "7", sz_long, "old", 2, 0, 0);
genamode (curi->smode, "srcreg", sz_long, "src", 1, 0, 0);
genastore ("src", Apdi, "7", sz_long, "old");
genastore ("m68k_areg (regs, 7)", curi->smode, "srcreg", sz_long, "src");
genamode (curi->dmode, "dstreg", curi->size, "offs", 1, 0, 0);
printf ("\tm68k_areg (regs, 7) += offs;\n");
fill_prefetch_next ();
break;
case i_UNLK:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
printf ("\tm68k_areg (regs, 7) = src;\n");
genamode (Aipi, "7", sz_long, "old", 1, 0, 0);
fill_prefetch_next ();
genastore ("old", curi->smode, "srcreg", curi->size, "src");
break;
case i_RTS:
printf ("\tm68k_do_rts();\n");
m68k_pc_offset = 0;
fill_prefetch_full ();
break;
case i_TRAPV:
sync_m68k_pc ();
printf ("\tif (GET_VFLG) {\n");
printf ("\t\tException (7, m68k_getpc ());\n");
printf ("\t\tgoto %s;\n", endlabelstr);
printf ("\t}\n");
fill_prefetch_next ();
need_endlabel = 1;
break;
case i_RTR:
printf ("\tMakeSR();\n");
genamode (Aipi, "7", sz_word, "sr", 1, 0, 0);
genamode (Aipi, "7", sz_long, "pc", 1, 0, 0);
printf ("\tregs.sr &= 0xFF00; sr &= 0xFF;\n");
printf ("\tregs.sr |= sr; m68k_setpc (pc);\n");
printf ("\tMakeFromSR();\n");
m68k_pc_offset = 0;
fill_prefetch_full ();
break;
case i_JSR:
genamode (curi->smode, "srcreg", curi->size, "src", 0, 0, GF_AA|GF_NOREFILL);
start_brace ();
printf ("\tuaecptr oldpc = m68k_getpc () + %d;\n", m68k_pc_offset);
if (using_exception_3) {
printf ("\tif (srca & 1) {\n");
printf ("\t\texception3i (opcode, oldpc, srca);\n");
printf ("\t\tgoto %s;\n", endlabelstr);
printf ("\t}\n");
need_endlabel = 1;
}
printf ("\tm68k_setpc (srca);\n");
m68k_pc_offset = 0;
fill_prefetch_1 (0);
printf("\tm68k_areg (regs, 7) -= 4;\n");
printf("\tput_long (m68k_areg (regs, 7), oldpc);\n");
fill_prefetch_next ();
break;
case i_JMP:
genamode (curi->smode, "srcreg", curi->size, "src", 0, 0, GF_AA|GF_NOREFILL);
if (using_exception_3) {
printf ("\tif (srca & 1) {\n");
printf ("\t\texception3i (opcode, m68k_getpc () + 6, srca);\n");
printf ("\t\tgoto %s;\n", endlabelstr);
printf ("\t}\n");
need_endlabel = 1;
}
if (curi->smode == Ad16 || curi->smode == Ad8r || curi->smode == absw || curi->smode == PC16 || curi->smode == PC8r)
addcycles (2);
printf ("\tm68k_setpc (srca);\n");
m68k_pc_offset = 0;
fill_prefetch_full ();
break;
case i_BSR:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, GF_AA|GF_NOREFILL);
printf ("\tuae_s32 s = (uae_s32)src + 2;\n");
if (using_exception_3) {
printf ("\tif (src & 1) {\n");
printf ("\t\texception3i (opcode, m68k_getpc () + 2, m68k_getpc () + s);\n");
printf ("\t\tgoto %s;\n", endlabelstr);
printf ("\t}\n");
need_endlabel = 1;
}
addcycles (2);
printf ("\tm68k_do_bsr(m68k_getpc () + %d, s);\n", m68k_pc_offset);
m68k_pc_offset = 0;
fill_prefetch_full ();
break;
case i_Bcc:
if (curi->size == sz_long) {
if (cpu_level < 2) {
addcycles (2);
printf ("\tif (cctrue(%d)) {\n", curi->cc, endlabelstr);
printf ("\t\texception3i (opcode, m68k_getpc () + 2, m68k_getpc () + 1);\n");
printf ("\t\tgoto %s;\n", endlabelstr);
printf ("\t}\n");
sync_m68k_pc ();
irc2ir ();
fill_prefetch_2 ();
printf ("\tgoto %s;\n", endlabelstr);
need_endlabel = 1;
} else {
if (next_cpu_level < 1)
next_cpu_level = 1;
}
}
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, GF_AA | GF_NOREFILL);
addcycles (2);
printf ("\tif (!cctrue(%d)) goto didnt_jump;\n", curi->cc);
if (using_exception_3) {
printf ("\tif (src & 1) {\n");
printf ("\t\texception3i (opcode, m68k_getpc () + 2, m68k_getpc () + 2 + (uae_s32)src);\n");
printf ("\t\tgoto %s;\n", endlabelstr);
printf ("\t}\n");
need_endlabel = 1;
}
if (using_prefetch) {
if (curi->size == sz_byte) {
printf ("\tm68k_incpc ((uae_s32)src + 2);\n");
} else {
printf ("\tm68k_incpc ((uae_s32)src + 2);\n");
}
fill_prefetch_full ();
if (using_ce)
printf ("\treturn;\n");
else
printf ("\treturn 10 * CYCLE_UNIT / 2;\n");
} else {
printf ("\tm68k_incpc ((uae_s32)src + 2);\n");
returncycles ("\t", 10);
}
printf ("didnt_jump:;\n");
need_endlabel = 1;
sync_m68k_pc ();
if (curi->size == sz_byte) {
addcycles (2);
irc2ir ();
fill_prefetch_2 ();
} else
fill_prefetch_full ();
insn_n_cycles = curi->size == sz_byte ? 8 : 12;
break;
case i_LEA:
genamode (curi->smode, "srcreg", curi->size, "src", 0, 0, GF_AA);
genamode (curi->dmode, "dstreg", curi->size, "dst", 2, 0, GF_AA);
if (curi->smode == Ad8r || curi->smode == PC8r)
addcycles (4);
fill_prefetch_next ();
genastore ("srca", curi->dmode, "dstreg", curi->size, "dst");
break;
case i_PEA:
genamode (curi->smode, "srcreg", curi->size, "src", 0, 0, GF_AA);
genamode (Apdi, "7", sz_long, "dst", 2, 0, GF_AA);
if (curi->smode == Ad8r || curi->smode == PC8r)
addcycles (4);
if (!(curi->smode == absw || curi->smode == absl))
fill_prefetch_next ();
genastore ("srca", Apdi, "7", sz_long, "dst");
if ((curi->smode == absw || curi->smode == absl))
fill_prefetch_next ();
break;
case i_DBcc:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, GF_AA|GF_NOREFILL);
genamode (curi->dmode, "dstreg", curi->size, "offs", 1, 0, GF_AA|GF_NOREFILL);
printf ("\tuaecptr oldpc = m68k_getpc ();\n");
addcycles (2);
printf ("\tif (!cctrue(%d)) {\n", curi->cc);
printf ("\t\tm68k_incpc ((uae_s32)offs + 2);\n");
printf ("\t"); fill_prefetch_1 (0);
printf ("\t"); genastore ("(src-1)", curi->smode, "srcreg", curi->size, "src");
printf ("\t\tif (src) {\n");
if (using_exception_3) {
printf ("\t\t\tif (offs & 1) {\n");
printf ("\t\t\t\texception3i (opcode, m68k_getpc () + 2, m68k_getpc () + 2 + (uae_s32)offs + 2);\n");
printf ("\t\t\t\tgoto %s;\n", endlabelstr);
printf ("\t\t\t}\n");
need_endlabel = 1;
}
irc2ir ();
fill_prefetch_1 (2);
returncycles ("\t\t\t", 12);
printf ("\t\t}\n");
printf ("\t} else {\n");
addcycles2 ("\t\t", 2);
printf ("\t}\n");
printf ("\tm68k_setpc (oldpc + %d);\n", m68k_pc_offset);
m68k_pc_offset = 0;
fill_prefetch_full ();
insn_n_cycles = 12;
need_endlabel = 1;
break;
case i_Scc:
genamode (curi->smode, "srcreg", curi->size, "src", cpu_level == 0 ? 1 : 2, 0, 0);
start_brace ();
fill_prefetch_next ();
printf ("\tint val = cctrue(%d) ? 0xff : 0;\n", curi->cc);
genastore ("val", curi->smode, "srcreg", curi->size, "src");
break;
case i_DIVU:
printf ("\tuaecptr oldpc = m68k_getpc ();\n");
genamode (curi->smode, "srcreg", sz_word, "src", 1, 0, 0);
genamode (curi->dmode, "dstreg", sz_long, "dst", 1, 0, 0);
printf ("\tCLEAR_CZNV;\n");
printf ("\tif (src == 0) {\n");
if (cpu_level > 0) {
/* 68020 sets V when dividing by zero and N if dst is negative
* 68000 clears both
*/
printf("\t\tSET_VFLG (1);\n");
printf("\t\tif (dst < 0) SET_NFLG (1);\n");
}
printf ("\t\tm68k_incpc (%d);\n", m68k_pc_offset);
printf ("\t\tException (5, oldpc);\n");
printf ("\t\tgoto %s;\n", endlabelstr);
printf ("\t} else {\n");
printf ("\t\tuae_u32 newv = (uae_u32)dst / (uae_u32)(uae_u16)src;\n");
printf ("\t\tuae_u32 rem = (uae_u32)dst %% (uae_u32)(uae_u16)src;\n");
if (using_ce) {
printf ("\t\tint cycles = 138 * CYCLE_UNIT / 2 - lostcycles;\n");
}
/* The N flag appears to be set each time there is an overflow.
* Weird. but 68020 only sets N when dst is negative.. */
printf ("\t\tif (newv > 0xffff) {\n");
printf ("\t\t\tSET_VFLG (1);\n");
#ifdef UNDEF68020
if (cpu_level >= 2)
printf ("\t\t\tif (currprefs.cpu_level == 0 || dst < 0) SET_NFLG (1);\n");
else /* ??? some 68000 revisions may not set NFLG when overflow happens.. */
#endif
printf ("\t\t\tSET_NFLG (1);\n");
printf ("\t\t} else {\n");
printf ("\t\t"); genflags (flag_logical, sz_word, "newv", "", "");
printf ("\t\t\tnewv = (newv & 0xffff) | ((uae_u32)rem << 16);\n");
printf ("\t\t"); genastore ("newv", curi->dmode, "dstreg", sz_long, "dst");
printf ("\t\t}\n");
fill_prefetch_next ();
sync_m68k_pc ();
printf ("\t}\n");
insn_n_cycles += 136;
need_endlabel = 1;
break;
case i_DIVS:
printf ("\tuaecptr oldpc = m68k_getpc ();\n");
genamode (curi->smode, "srcreg", sz_word, "src", 1, 0, 0);
genamode (curi->dmode, "dstreg", sz_long, "dst", 1, 0, 0);
printf ("\tCLEAR_CZNV;\n");
printf ("\tif (src == 0) {\n");
if (cpu_level > 0) {
/* 68020 sets V when dividing by zero. Z is also set.
* 68000 clears both
*/
printf("\t\tSET_VFLG (1);\n");
printf("\t\tSET_ZFLG (1);\n");
}
printf ("\t\tm68k_incpc (%d);\n", m68k_pc_offset);
printf ("\t\tException (5, oldpc);\n");
printf ("\t\tgoto %s;\n", endlabelstr);
printf ("\t} else {\n");
printf ("\t\tuae_s32 newv = (uae_s32)dst / (uae_s32)(uae_s16)src;\n");
printf ("\t\tuae_u16 rem = (uae_s32)dst %% (uae_s32)(uae_s16)src;\n");
if (using_ce) {
printf ("\t\tint cycles = 156 * CYCLE_UNIT / 2 - lostcycles;\n");
}
printf ("\t\tif ((newv & 0xffff8000) != 0 && (newv & 0xffff8000) != 0xffff8000) {\n");
printf ("\t\t\tSET_VFLG (1);\n");
#ifdef UNDEF68020
if (cpu_level > 0)
printf ("\t\t\tif (currprefs.cpu_level == 0) SET_NFLG (1);\n");
else
#endif
printf ("\t\t\tSET_NFLG (1);\n");
printf ("\t\t} else {\n");
printf ("\t\t\tif (((uae_s16)rem < 0) != ((uae_s32)dst < 0)) rem = -rem;\n");
genflags (flag_logical, sz_word, "newv", "", "");
printf ("\t\t\tnewv = (newv & 0xffff) | ((uae_u32)rem << 16);\n");
printf ("\t\t"); genastore ("newv", curi->dmode, "dstreg", sz_long, "dst");
printf ("\t\t}\n");
fill_prefetch_next ();
sync_m68k_pc ();
printf ("\t}\n");
insn_n_cycles += 154;
need_endlabel = 1;
break;
case i_MULU:
genamode (curi->smode, "srcreg", sz_word, "src", 1, 0, 0);
genamode (curi->dmode, "dstreg", sz_word, "dst", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
printf ("\tuae_u32 newv = (uae_u32)(uae_u16)dst * (uae_u32)(uae_u16)src;\n");
genflags (flag_logical, sz_long, "newv", "", "");
genastore ("newv", curi->dmode, "dstreg", sz_long, "dst");
sync_m68k_pc ();
insn_n_cycles += 66;
break;
case i_MULS:
genamode (curi->smode, "srcreg", sz_word, "src", 1, 0, 0);
genamode (curi->dmode, "dstreg", sz_word, "dst", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
printf ("\tuae_u32 newv = (uae_s32)(uae_s16)dst * (uae_s32)(uae_s16)src;\n");
genflags (flag_logical, sz_long, "newv", "", "");
genastore ("newv", curi->dmode, "dstreg", sz_long, "dst");
insn_n_cycles += 66;
break;
case i_CHK:
printf ("\tuaecptr oldpc = m68k_getpc ();\n");
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0, 0);
sync_m68k_pc ();
addcycles (6);
fill_prefetch_next ();
printf ("\tif ((uae_s32)dst < 0) {\n");
printf ("\t\tSET_NFLG (1);\n");
printf ("\t\tException (6, oldpc);\n");
printf ("\t\tgoto %s;\n", endlabelstr);
printf ("\t} else if (dst > src) {\n");
printf ("\t\tSET_NFLG (0);\n");
printf ("\t\tException (6, oldpc);\n");
printf ("\t\tgoto %s;\n", endlabelstr);
printf ("\t}\n");
need_endlabel = 1;
break;
case i_CHK2:
printf ("\tuaecptr oldpc = m68k_getpc ();\n");
genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "dst", 2, 0, 0);
fill_prefetch_0 ();
printf ("\t{uae_s32 upper,lower,reg = regs.regs[(extra >> 12) & 15];\n");
switch (curi->size) {
case sz_byte:
printf ("\tlower=(uae_s32)(uae_s8)get_byte (dsta); upper = (uae_s32)(uae_s8)get_byte (dsta+1);\n");
printf ("\tif ((extra & 0x8000) == 0) reg = (uae_s32)(uae_s8)reg;\n");
break;
case sz_word:
printf ("\tlower=(uae_s32)(uae_s16)get_word (dsta); upper = (uae_s32)(uae_s16)get_word (dsta+2);\n");
printf ("\tif ((extra & 0x8000) == 0) reg = (uae_s32)(uae_s16)reg;\n");
break;
case sz_long:
printf ("\tlower=get_long (dsta); upper = get_long (dsta+4);\n");
break;
default:
abort ();
}
printf ("\tSET_ZFLG (upper == reg || lower == reg);\n");
printf ("\tSET_CFLG (lower <= upper ? reg < lower || reg > upper : reg > upper || reg < lower);\n");
printf ("\tif ((extra & 0x800) && GET_CFLG) { Exception(6,oldpc); goto %s; }\n}\n", endlabelstr);
need_endlabel = 1;
break;
case i_ASR:
genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
switch (curi->size) {
case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
case sz_long: printf ("\tuae_u32 val = data;\n"); break;
default: abort ();
}
printf ("\tuae_u32 sign = (%s & val) >> %d;\n", cmask (curi->size), bit_size (curi->size) - 1);
printf ("\tcnt &= 63;\n");
printf ("\tCLEAR_CZNV;\n");
printf ("\tif (cnt >= %d) {\n", bit_size (curi->size));
printf ("\t\tval = %s & (uae_u32)-sign;\n", bit_mask (curi->size));
printf ("\t\tSET_CFLG (sign);\n");
duplicate_carry (0);
if (source_is_imm1_8 (curi))
printf ("\t} else {\n");
else
printf ("\t} else if (cnt > 0) {\n");
printf ("\t\tval >>= cnt - 1;\n");
printf ("\t\tSET_CFLG (val & 1);\n");
duplicate_carry (0);
printf ("\t\tval >>= 1;\n");
printf ("\t\tval |= (%s << (%d - cnt)) & (uae_u32)-sign;\n",
bit_mask (curi->size),
bit_size (curi->size));
printf ("\t\tval &= %s;\n", bit_mask (curi->size));
printf ("\t}\n");
genflags (flag_logical_noclobber, curi->size, "val", "", "");
genastore ("val", curi->dmode, "dstreg", curi->size, "data");
break;
case i_ASL:
genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
switch (curi->size) {
case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
case sz_long: printf ("\tuae_u32 val = data;\n"); break;
default: abort ();
}
printf ("\tcnt &= 63;\n");
printf ("\tCLEAR_CZNV;\n");
printf ("\tif (cnt >= %d) {\n", bit_size (curi->size));
printf ("\t\tSET_VFLG (val != 0);\n");
printf ("\t\tSET_CFLG (cnt == %d ? val & 1 : 0);\n",
bit_size (curi->size));
duplicate_carry (0);
printf ("\t\tval = 0;\n");
if (source_is_imm1_8 (curi))
printf ("\t} else {\n");
else
printf ("\t} else if (cnt > 0) {\n");
printf ("\t\tuae_u32 mask = (%s << (%d - cnt)) & %s;\n",
bit_mask (curi->size),
bit_size (curi->size) - 1,
bit_mask (curi->size));
printf ("\t\tSET_VFLG ((val & mask) != mask && (val & mask) != 0);\n");
printf ("\t\tval <<= cnt - 1;\n");
printf ("\t\tSET_CFLG ((val & %s) >> %d);\n", cmask (curi->size), bit_size (curi->size) - 1);
duplicate_carry (0);
printf ("\t\tval <<= 1;\n");
printf ("\t\tval &= %s;\n", bit_mask (curi->size));
printf ("\t}\n");
genflags (flag_logical_noclobber, curi->size, "val", "", "");
genastore ("val", curi->dmode, "dstreg", curi->size, "data");
break;
case i_LSR:
genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
switch (curi->size) {
case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
case sz_long: printf ("\tuae_u32 val = data;\n"); break;
default: abort ();
}
printf ("\tcnt &= 63;\n");
printf ("\tCLEAR_CZNV;\n");
printf ("\tif (cnt >= %d) {\n", bit_size (curi->size));
printf ("\t\tSET_CFLG ((cnt == %d) & (val >> %d));\n",
bit_size (curi->size), bit_size (curi->size) - 1);
duplicate_carry (0);
printf ("\t\tval = 0;\n");
if (source_is_imm1_8 (curi))
printf ("\t} else {\n");
else
printf ("\t} else if (cnt > 0) {\n");
printf ("\t\tval >>= cnt - 1;\n");
printf ("\t\tSET_CFLG (val & 1);\n");
duplicate_carry (0);
printf ("\t\tval >>= 1;\n");
printf ("\t}\n");
genflags (flag_logical_noclobber, curi->size, "val", "", "");
genastore ("val", curi->dmode, "dstreg", curi->size, "data");
break;
case i_LSL:
genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
switch (curi->size) {
case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
case sz_long: printf ("\tuae_u32 val = data;\n"); break;
default: abort ();
}
printf ("\tcnt &= 63;\n");
printf ("\tCLEAR_CZNV;\n");
printf ("\tif (cnt >= %d) {\n", bit_size (curi->size));
printf ("\t\tSET_CFLG (cnt == %d ? val & 1 : 0);\n",
bit_size (curi->size));
duplicate_carry (0);
printf ("\t\tval = 0;\n");
if (source_is_imm1_8 (curi))
printf ("\t} else {\n");
else
printf ("\t} else if (cnt > 0) {\n");
printf ("\t\tval <<= (cnt - 1);\n");
printf ("\t\tSET_CFLG ((val & %s) >> %d);\n", cmask (curi->size), bit_size (curi->size) - 1);
duplicate_carry (0);
printf ("\t\tval <<= 1;\n");
printf ("\tval &= %s;\n", bit_mask (curi->size));
printf ("\t}\n");
genflags (flag_logical_noclobber, curi->size, "val", "", "");
genastore ("val", curi->dmode, "dstreg", curi->size, "data");
break;
case i_ROL:
genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
switch (curi->size) {
case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
case sz_long: printf ("\tuae_u32 val = data;\n"); break;
default: abort ();
}
printf ("\tcnt &= 63;\n");
printf ("\tCLEAR_CZNV;\n");
if (source_is_imm1_8 (curi))
printf ("{");
else
printf ("\tif (cnt > 0) {\n");
printf ("\tuae_u32 loval;\n");
printf ("\tcnt &= %d;\n", bit_size (curi->size) - 1);
printf ("\tloval = val >> (%d - cnt);\n", bit_size (curi->size));
printf ("\tval <<= cnt;\n");
printf ("\tval |= loval;\n");
printf ("\tval &= %s;\n", bit_mask (curi->size));
printf ("\tSET_CFLG (val & 1);\n");
printf ("}\n");
genflags (flag_logical_noclobber, curi->size, "val", "", "");
genastore ("val", curi->dmode, "dstreg", curi->size, "data");
break;
case i_ROR:
genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
switch (curi->size) {
case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
case sz_long: printf ("\tuae_u32 val = data;\n"); break;
default: abort ();
}
printf ("\tcnt &= 63;\n");
printf ("\tCLEAR_CZNV;\n");
if (source_is_imm1_8 (curi))
printf ("{");
else
printf ("\tif (cnt > 0) {");
printf ("\tuae_u32 hival;\n");
printf ("\tcnt &= %d;\n", bit_size (curi->size) - 1);
printf ("\thival = val << (%d - cnt);\n", bit_size (curi->size));
printf ("\tval >>= cnt;\n");
printf ("\tval |= hival;\n");
printf ("\tval &= %s;\n", bit_mask (curi->size));
printf ("\tSET_CFLG ((val & %s) >> %d);\n", cmask (curi->size), bit_size (curi->size) - 1);
printf ("\t}\n");
genflags (flag_logical_noclobber, curi->size, "val", "", "");
genastore ("val", curi->dmode, "dstreg", curi->size, "data");
break;
case i_ROXL:
genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
switch (curi->size) {
case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
case sz_long: printf ("\tuae_u32 val = data;\n"); break;
default: abort ();
}
printf ("\tcnt &= 63;\n");
printf ("\tCLEAR_CZNV;\n");
if (source_is_imm1_8 (curi))
printf ("{");
else {
force_range_for_rox ("cnt", curi->size);
printf ("\tif (cnt > 0) {\n");
}
printf ("\tcnt--;\n");
printf ("\t{\n\tuae_u32 carry;\n");
printf ("\tuae_u32 loval = val >> (%d - cnt);\n", bit_size (curi->size) - 1);
printf ("\tcarry = loval & 1;\n");
printf ("\tval = (((val << 1) | GET_XFLG) << cnt) | (loval >> 1);\n");
printf ("\tSET_XFLG (carry);\n");
printf ("\tval &= %s;\n", bit_mask (curi->size));
printf ("\t} }\n");
printf ("\tSET_CFLG (GET_XFLG);\n");
genflags (flag_logical_noclobber, curi->size, "val", "", "");
genastore ("val", curi->dmode, "dstreg", curi->size, "data");
break;
case i_ROXR:
genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
switch (curi->size) {
case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
case sz_long: printf ("\tuae_u32 val = data;\n"); break;
default: abort ();
}
printf ("\tcnt &= 63;\n");
printf ("\tCLEAR_CZNV;\n");
if (source_is_imm1_8 (curi))
printf ("{");
else {
force_range_for_rox ("cnt", curi->size);
printf ("\tif (cnt > 0) {\n");
}
printf ("\tcnt--;\n");
printf ("\t{\n\tuae_u32 carry;\n");
printf ("\tuae_u32 hival = (val << 1) | GET_XFLG;\n");
printf ("\thival <<= (%d - cnt);\n", bit_size (curi->size) - 1);
printf ("\tval >>= cnt;\n");
printf ("\tcarry = val & 1;\n");
printf ("\tval >>= 1;\n");
printf ("\tval |= hival;\n");
printf ("\tSET_XFLG (carry);\n");
printf ("\tval &= %s;\n", bit_mask (curi->size));
printf ("\t} }\n");
printf ("\tSET_CFLG (GET_XFLG);\n");
genflags (flag_logical_noclobber, curi->size, "val", "", "");
genastore ("val", curi->dmode, "dstreg", curi->size, "data");
break;
case i_ASRW:
genamode (curi->smode, "srcreg", curi->size, "data", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
switch (curi->size) {
case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
case sz_long: printf ("\tuae_u32 val = data;\n"); break;
default: abort ();
}
printf ("\tuae_u32 sign = %s & val;\n", cmask (curi->size));
printf ("\tuae_u32 cflg = val & 1;\n");
printf ("\tval = (val >> 1) | sign;\n");
genflags (flag_logical, curi->size, "val", "", "");
printf ("\tSET_CFLG (cflg);\n");
duplicate_carry (0);
genastore ("val", curi->smode, "srcreg", curi->size, "data");
break;
case i_ASLW:
genamode (curi->smode, "srcreg", curi->size, "data", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
switch (curi->size) {
case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
case sz_long: printf ("\tuae_u32 val = data;\n"); break;
default: abort ();
}
printf ("\tuae_u32 sign = %s & val;\n", cmask (curi->size));
printf ("\tuae_u32 sign2;\n");
printf ("\tval <<= 1;\n");
genflags (flag_logical, curi->size, "val", "", "");
printf ("\tsign2 = %s & val;\n", cmask (curi->size));
printf ("\tSET_CFLG (sign != 0);\n");
duplicate_carry (0);
printf ("\tSET_VFLG (GET_VFLG | (sign2 != sign));\n");
genastore ("val", curi->smode, "srcreg", curi->size, "data");
break;
case i_LSRW:
genamode (curi->smode, "srcreg", curi->size, "data", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
switch (curi->size) {
case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
case sz_long: printf ("\tuae_u32 val = data;\n"); break;
default: abort ();
}
printf ("\tuae_u32 carry = val & 1;\n");
printf ("\tval >>= 1;\n");
genflags (flag_logical, curi->size, "val", "", "");
printf ("SET_CFLG (carry);\n");
duplicate_carry (0);
genastore ("val", curi->smode, "srcreg", curi->size, "data");
break;
case i_LSLW:
genamode (curi->smode, "srcreg", curi->size, "data", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
switch (curi->size) {
case sz_byte: printf ("\tuae_u8 val = data;\n"); break;
case sz_word: printf ("\tuae_u16 val = data;\n"); break;
case sz_long: printf ("\tuae_u32 val = data;\n"); break;
default: abort ();
}
printf ("\tuae_u32 carry = val & %s;\n", cmask (curi->size));
printf ("\tval <<= 1;\n");
genflags (flag_logical, curi->size, "val", "", "");
printf ("SET_CFLG (carry >> %d);\n", bit_size (curi->size) - 1);
duplicate_carry (0);
genastore ("val", curi->smode, "srcreg", curi->size, "data");
break;
case i_ROLW:
genamode (curi->smode, "srcreg", curi->size, "data", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
switch (curi->size) {
case sz_byte: printf ("\tuae_u8 val = data;\n"); break;
case sz_word: printf ("\tuae_u16 val = data;\n"); break;
case sz_long: printf ("\tuae_u32 val = data;\n"); break;
default: abort ();
}
printf ("\tuae_u32 carry = val & %s;\n", cmask (curi->size));
printf ("\tval <<= 1;\n");
printf ("\tif (carry) val |= 1;\n");
genflags (flag_logical, curi->size, "val", "", "");
printf ("SET_CFLG (carry >> %d);\n", bit_size (curi->size) - 1);
genastore ("val", curi->smode, "srcreg", curi->size, "data");
break;
case i_RORW:
genamode (curi->smode, "srcreg", curi->size, "data", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
switch (curi->size) {
case sz_byte: printf ("\tuae_u8 val = data;\n"); break;
case sz_word: printf ("\tuae_u16 val = data;\n"); break;
case sz_long: printf ("\tuae_u32 val = data;\n"); break;
default: abort ();
}
printf ("\tuae_u32 carry = val & 1;\n");
printf ("\tval >>= 1;\n");
printf ("\tif (carry) val |= %s;\n", cmask (curi->size));
genflags (flag_logical, curi->size, "val", "", "");
printf ("SET_CFLG (carry);\n");
genastore ("val", curi->smode, "srcreg", curi->size, "data");
break;
case i_ROXLW:
genamode (curi->smode, "srcreg", curi->size, "data", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
switch (curi->size) {
case sz_byte: printf ("\tuae_u8 val = data;\n"); break;
case sz_word: printf ("\tuae_u16 val = data;\n"); break;
case sz_long: printf ("\tuae_u32 val = data;\n"); break;
default: abort ();
}
printf ("\tuae_u32 carry = val & %s;\n", cmask (curi->size));
printf ("\tval <<= 1;\n");
printf ("\tif (GET_XFLG) val |= 1;\n");
genflags (flag_logical, curi->size, "val", "", "");
printf ("SET_CFLG (carry >> %d);\n", bit_size (curi->size) - 1);
duplicate_carry (0);
genastore ("val", curi->smode, "srcreg", curi->size, "data");
break;
case i_ROXRW:
genamode (curi->smode, "srcreg", curi->size, "data", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
switch (curi->size) {
case sz_byte: printf ("\tuae_u8 val = data;\n"); break;
case sz_word: printf ("\tuae_u16 val = data;\n"); break;
case sz_long: printf ("\tuae_u32 val = data;\n"); break;
default: abort ();
}
printf ("\tuae_u32 carry = val & 1;\n");
printf ("\tval >>= 1;\n");
printf ("\tif (GET_XFLG) val |= %s;\n", cmask (curi->size));
genflags (flag_logical, curi->size, "val", "", "");
printf ("SET_CFLG (carry);\n");
duplicate_carry (0);
genastore ("val", curi->smode, "srcreg", curi->size, "data");
break;
case i_MOVEC2:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
printf ("\tint regno = (src >> 12) & 15;\n");
printf ("\tuae_u32 *regp = regs.regs + regno;\n");
printf ("\tif (! m68k_movec2(src & 0xFFF, regp)) goto %s;\n", endlabelstr);
break;
case i_MOVE2C:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
fill_prefetch_next ();
start_brace ();
printf ("\tint regno = (src >> 12) & 15;\n");
printf ("\tuae_u32 *regp = regs.regs + regno;\n");
printf ("\tif (! m68k_move2c(src & 0xFFF, regp)) goto %s;\n", endlabelstr);
break;
case i_CAS:
{
int old_brace_level;
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0, 0);
fill_prefetch_0 ();
start_brace ();
printf ("\tint ru = (src >> 6) & 7;\n");
printf ("\tint rc = src & 7;\n");
genflags (flag_cmp, curi->size, "newv", "m68k_dreg (regs, rc)", "dst");
printf ("\tif (GET_ZFLG)");
old_brace_level = n_braces;
start_brace ();
genastore ("(m68k_dreg (regs, ru))", curi->dmode, "dstreg", curi->size, "dst");
pop_braces (old_brace_level);
printf ("else");
start_brace ();
printf ("m68k_dreg (regs, rc) = dst;\n");
pop_braces (old_brace_level);
}
break;
case i_CAS2:
genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0, 0);
printf ("\tuae_u32 rn1 = regs.regs[(extra >> 28) & 15];\n");
printf ("\tuae_u32 rn2 = regs.regs[(extra >> 12) & 15];\n");
if (curi->size == sz_word) {
int old_brace_level = n_braces;
printf ("\tuae_u16 dst1 = get_word (rn1), dst2 = get_word (rn2);\n");
genflags (flag_cmp, curi->size, "newv", "m68k_dreg (regs, (extra >> 16) & 7)", "dst1");
printf ("\tif (GET_ZFLG) {\n");
genflags (flag_cmp, curi->size, "newv", "m68k_dreg (regs, extra & 7)", "dst2");
printf ("\tif (GET_ZFLG) {\n");
printf ("\tput_word (rn1, m68k_dreg (regs, (extra >> 22) & 7));\n");
printf ("\tput_word (rn1, m68k_dreg (regs, (extra >> 6) & 7));\n");
printf ("\t}}\n");
pop_braces (old_brace_level);
printf ("\tif (! GET_ZFLG) {\n");
printf ("\tm68k_dreg (regs, (extra >> 22) & 7) = (m68k_dreg (regs, (extra >> 22) & 7) & ~0xffff) | (dst1 & 0xffff);\n");
printf ("\tm68k_dreg (regs, (extra >> 6) & 7) = (m68k_dreg (regs, (extra >> 6) & 7) & ~0xffff) | (dst2 & 0xffff);\n");
printf ("\t}\n");
} else {
int old_brace_level = n_braces;
printf ("\tuae_u32 dst1 = get_long (rn1), dst2 = get_long (rn2);\n");
genflags (flag_cmp, curi->size, "newv", "m68k_dreg (regs, (extra >> 16) & 7)", "dst1");
printf ("\tif (GET_ZFLG) {\n");
genflags (flag_cmp, curi->size, "newv", "m68k_dreg (regs, extra & 7)", "dst2");
printf ("\tif (GET_ZFLG) {\n");
printf ("\tput_long (rn1, m68k_dreg (regs, (extra >> 22) & 7));\n");
printf ("\tput_long (rn1, m68k_dreg (regs, (extra >> 6) & 7));\n");
printf ("\t}}\n");
pop_braces (old_brace_level);
printf ("\tif (! GET_ZFLG) {\n");
printf ("\tm68k_dreg (regs, (extra >> 22) & 7) = dst1;\n");
printf ("\tm68k_dreg (regs, (extra >> 6) & 7) = dst2;\n");
printf ("\t}\n");
}
break;
case i_MOVES: /* ignore DFC and SFC because we have no MMU */
{
int old_brace_level;
genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0, 0);
printf ("\tif (extra & 0x800)\n");
old_brace_level = n_braces;
start_brace ();
printf ("\tuae_u32 src = regs.regs[(extra >> 12) & 15];\n");
genamode (curi->dmode, "dstreg", curi->size, "dst", 2, 0, 0);
genastore ("src", curi->dmode, "dstreg", curi->size, "dst");
pop_braces (old_brace_level);
printf ("else");
start_brace ();
genamode (curi->dmode, "dstreg", curi->size, "src", 1, 0, 0);
printf ("\tif (extra & 0x8000) {\n");
switch (curi->size) {
case sz_byte: printf ("\tm68k_areg (regs, (extra >> 12) & 7) = (uae_s32)(uae_s8)src;\n"); break;
case sz_word: printf ("\tm68k_areg (regs, (extra >> 12) & 7) = (uae_s32)(uae_s16)src;\n"); break;
case sz_long: printf ("\tm68k_areg (regs, (extra >> 12) & 7) = src;\n"); break;
default: abort ();
}
printf ("\t} else {\n");
genastore ("src", Dreg, "(extra >> 12) & 7", curi->size, "");
printf ("\t}\n");
pop_braces (old_brace_level);
}
break;
case i_BKPT: /* only needed for hardware emulators */
sync_m68k_pc ();
printf ("\top_illg(opcode);\n");
break;
case i_CALLM: /* not present in 68030 */
sync_m68k_pc ();
printf ("\top_illg(opcode);\n");
break;
case i_RTM: /* not present in 68030 */
sync_m68k_pc ();
printf ("\top_illg(opcode);\n");
break;
case i_TRAPcc:
if (curi->smode != am_unknown && curi->smode != am_illg)
genamode (curi->smode, "srcreg", curi->size, "dummy", 1, 0, 0);
fill_prefetch_0 ();
printf ("\tif (cctrue(%d)) { Exception(7,m68k_getpc ()); goto %s; }\n", curi->cc, endlabelstr);
need_endlabel = 1;
break;
case i_DIVL:
sync_m68k_pc ();
start_brace ();
printf ("\tuaecptr oldpc = m68k_getpc ();\n");
genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0, 0);
sync_m68k_pc ();
printf ("\tm68k_divl(opcode, dst, extra, oldpc);\n");
break;
case i_MULL:
genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0, 0);
genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0, 0);
sync_m68k_pc ();
printf ("\tm68k_mull(opcode, dst, extra);\n");
break;
case i_BFTST:
case i_BFEXTU:
case i_BFCHG:
case i_BFEXTS:
case i_BFCLR:
case i_BFFFO:
case i_BFSET:
case i_BFINS:
genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0, 0);
genamode (curi->dmode, "dstreg", sz_long, "dst", 2, 0, 0);
start_brace ();
printf ("\tuae_s32 offset = extra & 0x800 ? m68k_dreg (regs, (extra >> 6) & 7) : (extra >> 6) & 0x1f;\n");
printf ("\tint width = (((extra & 0x20 ? m68k_dreg (regs, extra & 7) : (uae_u32)extra) - 1) & 0x1f) + 1;\n");
if (curi->dmode == Dreg) {
printf ("\tuae_u32 tmp = m68k_dreg (regs, dstreg) << (offset & 0x1f);\n");
} else {
printf ("\tuae_u32 tmp,bf0,bf1;\n");
printf ("\tdsta += (offset >> 3) | (offset & 0x80000000 ? ~0x1fffffff : 0);\n");
printf ("\tbf0 = get_long (dsta);bf1 = get_byte (dsta+4) & 0xff;\n");
printf ("\ttmp = (bf0 << (offset & 7)) | (bf1 >> (8 - (offset & 7)));\n");
}
printf ("\ttmp >>= (32 - width);\n");
printf ("\tSET_NFLG (tmp & (1 << (width-1)) ? 1 : 0);\n");
printf ("\tSET_ZFLG (tmp == 0); SET_VFLG (0); SET_CFLG (0);\n");
switch (curi->mnemo) {
case i_BFTST:
break;
case i_BFEXTU:
printf ("\tm68k_dreg (regs, (extra >> 12) & 7) = tmp;\n");
break;
case i_BFCHG:
printf ("\ttmp = ~tmp;\n");
break;
case i_BFEXTS:
printf ("\tif (GET_NFLG) tmp |= width == 32 ? 0 : (-1 << width);\n");
printf ("\tm68k_dreg (regs, (extra >> 12) & 7) = tmp;\n");
break;
case i_BFCLR:
printf ("\ttmp = 0;\n");
break;
case i_BFFFO:
printf ("\t{ uae_u32 mask = 1 << (width-1);\n");
printf ("\twhile (mask) { if (tmp & mask) break; mask >>= 1; offset++; }}\n");
printf ("\tm68k_dreg (regs, (extra >> 12) & 7) = offset;\n");
break;
case i_BFSET:
printf ("\ttmp = 0xffffffff;\n");
break;
case i_BFINS:
printf ("\ttmp = m68k_dreg (regs, (extra >> 12) & 7);\n");
printf ("\tSET_NFLG (tmp & (1 << (width - 1)) ? 1 : 0);\n");
printf ("\tSET_ZFLG (tmp == 0);\n");
break;
default:
break;
}
if (curi->mnemo == i_BFCHG
|| curi->mnemo == i_BFCLR
|| curi->mnemo == i_BFSET
|| curi->mnemo == i_BFINS)
{
printf ("\ttmp <<= (32 - width);\n");
if (curi->dmode == Dreg) {
printf ("\tm68k_dreg (regs, dstreg) = (m68k_dreg (regs, dstreg) & ((offset & 0x1f) == 0 ? 0 :\n");
printf ("\t\t(0xffffffff << (32 - (offset & 0x1f))))) |\n");
printf ("\t\t(tmp >> (offset & 0x1f)) |\n");
printf ("\t\t(((offset & 0x1f) + width) >= 32 ? 0 :\n");
printf (" (m68k_dreg (regs, dstreg) & ((uae_u32)0xffffffff >> ((offset & 0x1f) + width))));\n");
} else {
printf ("\tbf0 = (bf0 & (0xff000000 << (8 - (offset & 7)))) |\n");
printf ("\t\t(tmp >> (offset & 7)) |\n");
printf ("\t\t(((offset & 7) + width) >= 32 ? 0 :\n");
printf ("\t\t (bf0 & ((uae_u32)0xffffffff >> ((offset & 7) + width))));\n");
printf ("\tput_long (dsta,bf0 );\n");
printf ("\tif (((offset & 7) + width) > 32) {\n");
printf ("\t\tbf1 = (bf1 & (0xff >> (width - 32 + (offset & 7)))) |\n");
printf ("\t\t\t(tmp << (8 - (offset & 7)));\n");
printf ("\t\tput_byte (dsta+4,bf1);\n");
printf ("\t}\n");
}
}
break;
case i_PACK:
if (curi->smode == Dreg) {
printf ("\tuae_u16 val = m68k_dreg (regs, srcreg) + %s;\n", gen_nextiword (0));
printf ("\tm68k_dreg (regs, dstreg) = (m68k_dreg (regs, dstreg) & 0xffffff00) | ((val >> 4) & 0xf0) | (val & 0xf);\n");
} else {
printf ("\tuae_u16 val;\n");
printf ("\tm68k_areg (regs, srcreg) -= areg_byteinc[srcreg];\n");
printf ("\tval = (uae_u16)get_byte (m68k_areg (regs, srcreg));\n");
printf ("\tm68k_areg (regs, srcreg) -= areg_byteinc[srcreg];\n");
printf ("\tval = (val | ((uae_u16)get_byte (m68k_areg (regs, srcreg)) << 8)) + %s;\n", gen_nextiword (0));
printf ("\tm68k_areg (regs, dstreg) -= areg_byteinc[dstreg];\n");
printf ("\tput_byte (m68k_areg (regs, dstreg),((val >> 4) & 0xf0) | (val & 0xf));\n");
}
break;
case i_UNPK:
if (curi->smode == Dreg) {
printf ("\tuae_u16 val = m68k_dreg (regs, srcreg);\n");
printf ("\tval = (((val << 4) & 0xf00) | (val & 0xf)) + %s;\n", gen_nextiword (0));
printf ("\tm68k_dreg (regs, dstreg) = (m68k_dreg (regs, dstreg) & 0xffff0000) | (val & 0xffff);\n");
} else {
printf ("\tuae_u16 val;\n");
printf ("\tm68k_areg (regs, srcreg) -= areg_byteinc[srcreg];\n");
printf ("\tval = (uae_u16)get_byte (m68k_areg (regs, srcreg));\n");
printf ("\tval = (((val << 4) & 0xf00) | (val & 0xf)) + %s;\n", gen_nextiword (0));
printf ("\tm68k_areg (regs, dstreg) -= areg_byteinc[dstreg];\n");
printf ("\tput_byte (m68k_areg (regs, dstreg),val);\n");
printf ("\tm68k_areg (regs, dstreg) -= areg_byteinc[dstreg];\n");
printf ("\tput_byte (m68k_areg (regs, dstreg),val >> 8);\n");
}
break;
case i_TAS:
genamode (curi->smode, "srcreg", curi->size, "src", 1, 0, 0);
genflags (flag_logical, curi->size, "src", "", "");
if (!isreg (curi->smode))
addcycles (2);
fill_prefetch_next ();
printf ("\tsrc |= 0x80;\n");
genastore ("src", curi->smode, "srcreg", curi->size, "src");
break;
case i_FPP:
genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0, 0);
sync_m68k_pc ();
printf ("\tfpp_opp(opcode,extra);\n");
break;
case i_FDBcc:
genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0, 0);
sync_m68k_pc ();
printf ("\tfdbcc_opp(opcode,extra);\n");
break;
case i_FScc:
genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0, 0);
sync_m68k_pc ();
printf ("\tfscc_opp(opcode,extra);\n");
break;
case i_FTRAPcc:
sync_m68k_pc ();
start_brace ();
printf ("\tuaecptr oldpc = m68k_getpc ();\n");
if (curi->smode != am_unknown && curi->smode != am_illg)
genamode (curi->smode, "srcreg", curi->size, "dummy", 1, 0, 0);
sync_m68k_pc ();
printf ("\tftrapcc_opp(opcode,oldpc);\n");
break;
case i_FBcc:
sync_m68k_pc ();
start_brace ();
printf ("\tuaecptr pc = m68k_getpc ();\n");
genamode (curi->dmode, "srcreg", curi->size, "extra", 1, 0, 0);
sync_m68k_pc ();
printf ("\tfbcc_opp(opcode,pc,extra);\n");
break;
case i_FSAVE:
sync_m68k_pc ();
printf ("\tfsave_opp(opcode);\n");
break;
case i_FRESTORE:
sync_m68k_pc ();
printf ("\tfrestore_opp(opcode);\n");
break;
case i_CINVL:
case i_CINVP:
case i_CINVA:
case i_CPUSHL:
case i_CPUSHP:
case i_CPUSHA:
break;
case i_MOVE16:
if ((opcode & 0xfff8) == 0xf620) {
/* MOVE16 (Ax)+,(Ay)+ */
printf ("\tuaecptr mems = m68k_areg (regs, srcreg) & ~15, memd;\n");
printf ("\tdstreg = (%s >> 12) & 7;\n", gen_nextiword (0));
printf ("\tmemd = m68k_areg (regs, dstreg) & ~15;\n");
printf ("\tput_long (memd, get_long (mems));\n");
printf ("\tput_long (memd+4, get_long (mems+4));\n");
printf ("\tput_long (memd+8, get_long (mems+8));\n");
printf ("\tput_long (memd+12, get_long (mems+12));\n");
printf ("\tif (srcreg != dstreg)\n");
printf ("\tm68k_areg (regs, srcreg) += 16;\n");
printf ("\tm68k_areg (regs, dstreg) += 16;\n");
} else {
/* Other variants */
genamode (curi->smode, "srcreg", curi->size, "mems", 0, 2, 0);
genamode (curi->dmode, "dstreg", curi->size, "memd", 0, 2, 0);
printf ("\tmemsa &= ~15;\n");
printf ("\tmemda &= ~15;\n");
printf ("\tput_long (memda, get_long (memsa));\n");
printf ("\tput_long (memda+4, get_long (memsa+4));\n");
printf ("\tput_long (memda+8, get_long (memsa+8));\n");
printf ("\tput_long (memda+12, get_long (memsa+12));\n");
if ((opcode & 0xfff8) == 0xf600)
printf ("\tm68k_areg (regs, srcreg) += 16;\n");
else if ((opcode & 0xfff8) == 0xf608)
printf ("\tm68k_areg (regs, dstreg) += 16;\n");
}
break;
case i_MMUOP:
genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0, 0);
sync_m68k_pc ();
printf ("\tmmu_op (opcode, extra);\n");
break;
case i_MMUOP30A:
printf ("\tuaecptr pc = m68k_getpc ();\n");
if (curi->smode == Areg || curi->smode == Dreg)
printf("\tuae_u16 extraa = 0;\n");
else
genamode (curi->smode, "srcreg", curi->size, "extra", 0, 0, 0);
sync_m68k_pc ();
printf ("\tmmu_op30 (pc, opcode, 1, extraa);\n");
break;
case i_MMUOP30B:
printf ("\tuaecptr pc = m68k_getpc ();\n");
genamode (curi->smode, "srcreg", curi->size, "extra", 0, 0, 0);
sync_m68k_pc ();
printf ("\tmmu_op30 (pc, opcode, 0, 0);\n");
break;
default:
abort ();
break;
}
finish_braces ();
fill_prefetch_finish ();
sync_m68k_pc ();
did_prefetch = 0;
}
static void generate_includes (FILE * f)
{
fprintf (f, "#include \"sysconfig.h\"\n");
fprintf (f, "#include \"sysdeps.h\"\n");
fprintf (f, "#include \"options.h\"\n");
fprintf (f, "#include \"memory.h\"\n");
fprintf (f, "#include \"custom.h\"\n");
fprintf (f, "#include \"newcpu.h\"\n");
fprintf (f, "#include \"cpu_prefetch.h\"\n");
fprintf (f, "#include \"cputbl.h\"\n");
fprintf (f, "#define CPUFUNC(x) x##_ff\n"
"#ifdef NOFLAGS\n"
"#include \"noflags.h\"\n"
"#endif\n");
}
static int postfix;
static void generate_one_opcode (int rp)
{
int i;
uae_u16 smsk, dmsk;
long int opcode = opcode_map[rp];
if (table68k[opcode].mnemo == i_ILLG
|| table68k[opcode].clev > cpu_level)
return;
for (i = 0; lookuptab[i].name[0]; i++) {
if (table68k[opcode].mnemo == lookuptab[i].mnemo)
break;
}
if (table68k[opcode].handler != -1)
return;
if (generate_stbl) {
if (opcode_next_clev[rp] != cpu_level) {
fprintf (stblfile, "{ CPUFUNC(op_%lx_%d), 0, %ld }, /* %s */\n", opcode, opcode_last_postfix[rp],
opcode, lookuptab[i].name);
return;
}
fprintf (stblfile, "{ CPUFUNC(op_%lx_%d), 0, %ld }, /* %s */\n", opcode, postfix, opcode, lookuptab[i].name);
}
fprintf (headerfile, "extern cpuop_func op_%lx_%d_nf;\n", opcode, postfix);
fprintf (headerfile, "extern cpuop_func op_%lx_%d_ff;\n", opcode, postfix);
printf ("unsigned long REGPARAM2 CPUFUNC(op_%lx_%d)(uae_u32 opcode) /* %s */\n{\n", opcode, postfix, lookuptab[i].name);
switch (table68k[opcode].stype) {
case 0: smsk = 7; break;
case 1: smsk = 255; break;
case 2: smsk = 15; break;
case 3: smsk = 7; break;
case 4: smsk = 7; break;
case 5: smsk = 63; break;
case 7: smsk = 3; break;
default: abort ();
}
dmsk = 7;
next_cpu_level = -1;
if (table68k[opcode].suse
&& table68k[opcode].smode != imm && table68k[opcode].smode != imm0
&& table68k[opcode].smode != imm1 && table68k[opcode].smode != imm2
&& table68k[opcode].smode != absw && table68k[opcode].smode != absl
&& table68k[opcode].smode != PC8r && table68k[opcode].smode != PC16)
{
if (table68k[opcode].spos == -1) {
if (((int) table68k[opcode].sreg) >= 128)
printf ("\tuae_u32 srcreg = (uae_s32)(uae_s8)%d;\n", (int) table68k[opcode].sreg);
else
printf ("\tuae_u32 srcreg = %d;\n", (int) table68k[opcode].sreg);
} else {
char source[100];
int pos = table68k[opcode].spos;
if (pos)
sprintf (source, "((opcode >> %d) & %d)", pos, smsk);
else
sprintf (source, "(opcode & %d)", smsk);
if (table68k[opcode].stype == 3)
printf ("\tuae_u32 srcreg = imm8_table[%s];\n", source);
else if (table68k[opcode].stype == 1)
printf ("\tuae_u32 srcreg = (uae_s32)(uae_s8)%s;\n", source);
else
printf ("\tuae_u32 srcreg = %s;\n", source);
}
}
if (table68k[opcode].duse
/* Yes, the dmode can be imm, in case of LINK or DBcc */
&& table68k[opcode].dmode != imm && table68k[opcode].dmode != imm0
&& table68k[opcode].dmode != imm1 && table68k[opcode].dmode != imm2
&& table68k[opcode].dmode != absw && table68k[opcode].dmode != absl)
{
if (table68k[opcode].dpos == -1) {
if (((int) table68k[opcode].dreg) >= 128)
printf ("\tuae_u32 dstreg = (uae_s32)(uae_s8)%d;\n", (int) table68k[opcode].dreg);
else
printf ("\tuae_u32 dstreg = %d;\n", (int) table68k[opcode].dreg);
} else {
int pos = table68k[opcode].dpos;
#if 0
/* Check that we can do the little endian optimization safely. */
if (pos < 8 && (dmsk >> (8 - pos)) != 0)
abort ();
#endif
if (pos)
printf ("\tuae_u32 dstreg = (opcode >> %d) & %d;\n",
pos, dmsk);
else
printf ("\tuae_u32 dstreg = opcode & %d;\n", dmsk);
}
}
need_endlabel = 0;
endlabelno++;
sprintf (endlabelstr, "endlabel%d", endlabelno);
gen_opcode (opcode);
if (need_endlabel)
printf ("%s: ;\n", endlabelstr);
printf ("return %d * CYCLE_UNIT / 2;\n", insn_n_cycles);
printf ("}\n");
opcode_next_clev[rp] = next_cpu_level;
opcode_last_postfix[rp] = postfix;
}
static void generate_func (void)
{
int i, j, rp;
using_prefetch = 0;
using_exception_3 = 0;
for (i = 0; i < 7; i++) {
cpu_level = 6 - i;
if (i == 6) {
cpu_level = 0;
using_prefetch = 1;
using_exception_3 = 1;
for (rp = 0; rp < nr_cpuop_funcs; rp++)
opcode_next_clev[rp] = 0;
}
postfix = i;
generate_stbl = i != 5;
if (generate_stbl) {
fprintf (stblfile, "const struct cputbl CPUFUNC(op_smalltbl_%d)[] = {\n", postfix);
/* sam: this is for people with low memory (eg. me :)) */
printf ("\n"
"#if !defined(PART_1) && !defined(PART_2) && "
"!defined(PART_3) && !defined(PART_4) && "
"!defined(PART_5) && !defined(PART_6) && "
"!defined(PART_7) && !defined(PART_8)"
"\n"
"#define PART_1 1\n"
"#define PART_2 1\n"
"#define PART_3 1\n"
"#define PART_4 1\n"
"#define PART_5 1\n"
"#define PART_6 1\n"
"#define PART_7 1\n"
"#define PART_8 1\n"
"#endif\n\n");
}
rp = 0;
for(j = 1; j <= 8; ++j) {
int k = (j * nr_cpuop_funcs) / 8;
printf ("#ifdef PART_%d\n",j);
for (; rp < k; rp++)
generate_one_opcode (rp);
printf ("#endif\n\n");
}
if (generate_stbl)
fprintf (stblfile, "{ 0, 0, 0 }};\n");
}
}
int main (int argc, char **argv)
{
read_table68k ();
do_merges ();
opcode_map = (int *) xmalloc (sizeof (int) * nr_cpuop_funcs);
opcode_last_postfix = (int *) xmalloc (sizeof (int) * nr_cpuop_funcs);
opcode_next_clev = (int *) xmalloc (sizeof (int) * nr_cpuop_funcs);
counts = (unsigned long *) xmalloc (65536 * sizeof (unsigned long));
read_counts ();
/* It would be a lot nicer to put all in one file (we'd also get rid of
* cputbl.h that way), but cpuopti can't cope. That could be fixed, but
* I don't dare to touch the 68k version. */
headerfile = fopen ("cputbl.h", "wb");
stblfile = fopen ("cpustbl.c", "wb");
freopen ("cpuemu.c", "wb", stdout);
generate_includes (stdout);
generate_includes (stblfile);
generate_func ();
free (table68k);
return 0;
}