static void addq_b(struct cpu *cpu, int s, int mode)
{
BYTE d,r;
d = ea_read_byte(cpu, mode, 1);
r = s+d;
ea_write_byte(cpu, mode, r);
ADD_CYCLE(4);
cpu_set_flags_add(cpu, 0, d&0x80, r&0x80, r);
}
static void not_b(struct cpu *cpu, WORD op)
{
BYTE r;
ADD_CYCLE(4);
if(op&0x38) {
ADD_CYCLE(4);
}
r = ~ea_read_byte(cpu, op&0x3f, 1);
ea_set_prefetch_before_write();
ea_write_byte(cpu, op&0x3f, r);
cpu_set_flags_move(cpu, r&0x80, r);
}
static void negx_b(struct cpu *cpu, WORD op)
{
BYTE d,r;
d = ea_read_byte(cpu, op&0x3f, 1);
r = 0-d;
if(CHKX) r -= 1;
ea_set_prefetch_before_write();
ea_write_byte(cpu, op&0x3f, r);
ADD_CYCLE(4);
if(op&0x38) {
ADD_CYCLE(4);
}
cpu_set_flags_negx(cpu, d&0x80, r&0x80, r);
}
static void subi_b(struct cpu *cpu, WORD op)
{
BYTE s,d,r;
s = bus_read_word(cpu->pc)&0xff;
cpu->pc += 2;
if(op&0x38) {
ADD_CYCLE(12);
} else {
ADD_CYCLE(8);
}
d = ea_read_byte(cpu, op&0x3f, 1);
r = d-s;
ea_set_prefetch_before_write();
ea_write_byte(cpu, op&0x3f, r);
cpu_set_flags_sub(cpu, s&0x80, d&0x80, r&0x80, r);
}
static void bset_r(struct cpu *cpu, int reg, int mode)
{
BYTE b,d;
b = cpu->d[reg]&31;
if(mode&0x38) {
ADD_CYCLE(4);
d = ea_read_byte(cpu, mode, 1);
if(d & (1<<(b&7))) CLRZ; else SETZ;
d |= (1<<(b&7));
ea_set_prefetch_before_write();
ea_write_byte(cpu, mode, d);
} else {
ADD_CYCLE(6);
if(cpu->d[mode&7] & (1<<b)) CLRZ; else SETZ;
cpu->d[mode&7] |= (1<<b);
}
}
static void bset_i(struct cpu *cpu, int mode)
{
BYTE b,d;
b = (BYTE)bus_read_word(cpu->pc)&0xff;
b &= 31;
cpu->pc += 2;
if(mode&0x38) {
ADD_CYCLE(8);
d = ea_read_byte(cpu, mode, 1);
if(d & (1<<(b&7))) CLRZ; else SETZ;
d |= (1<<(b&7));
ea_set_prefetch_before_write();
ea_write_byte(cpu, mode, d);
} else {
ADD_CYCLE(10);
if(cpu->d[mode&7] & (1<<b)) CLRZ; else SETZ;
cpu->d[mode&7] |= (1<<b);
}
}
void scc1(struct cpu *cpu, WORD op)
{
int r;
ENTER;
if(op&0x38) {
r = 1;
ADD_CYCLE(4);
} else {
r = 0;
ADD_CYCLE(6);
}
switch((op&0xf00)>>8) {
case 0: /* ST */
ADD_CYCLE(2);
ea_set_prefetch_before_write();
ea_write_byte(cpu, op&0x3f, 0xff);
return;
case 1: /* SF */
break;
case 2: /* SHI */
if(!CHKC && !CHKZ) {
ADD_CYCLE(2);
ea_set_prefetch_before_write();
ea_write_byte(cpu, op&0x3f, 0xff);
return;
}
break;
case 3: /* SLS */
if(CHKC || CHKZ) {
ADD_CYCLE(2);
ea_set_prefetch_before_write();
ea_write_byte(cpu, op&0x3f, 0xff);
return;
}
break;
case 4: /* SCC */
if(!CHKC) {
ADD_CYCLE(2);
ea_set_prefetch_before_write();
ea_write_byte(cpu, op&0x3f, 0xff);
return;
}
break;
case 5: /* SCS */
if(CHKC) {
ADD_CYCLE(2);
ea_set_prefetch_before_write();
ea_write_byte(cpu, op&0x3f, 0xff);
return;
}
break;
case 6: /* SNE */
if(!CHKZ) {
ADD_CYCLE(2);
ea_set_prefetch_before_write();
ea_write_byte(cpu, op&0x3f, 0xff);
return;
}
break;
case 7: /* SEQ */
if(CHKZ) {
ADD_CYCLE(2);
ea_set_prefetch_before_write();
ea_write_byte(cpu, op&0x3f, 0xff);
return;
}
break;
case 8: /* SVC */
if(!CHKV) {
ADD_CYCLE(2);
ea_set_prefetch_before_write();
ea_write_byte(cpu, op&0x3f, 0xff);
return;
}
break;
case 9: /* SVS */
if(CHKV) {
ADD_CYCLE(2);
ea_set_prefetch_before_write();
ea_write_byte(cpu, op&0x3f, 0xff);
return;
}
break;
case 10: /* SPL */
if(!CHKN) {
ADD_CYCLE(2);
ea_set_prefetch_before_write();
ea_write_byte(cpu, op&0x3f, 0xff);
return;
}
break;
case 11: /* SMI */
if(CHKN) {
ADD_CYCLE(2);
ea_set_prefetch_before_write();
ea_write_byte(cpu, op&0x3f, 0xff);
return;
}
break;
case 12: /* SGE */
if((CHKN && CHKV) || (!CHKN && !CHKV)) {
ADD_CYCLE(2);
ea_set_prefetch_before_write();
ea_write_byte(cpu, op&0x3f, 0xff);
return;
}
break;
case 13: /* SLT */
if((CHKN & !CHKV) | ((!CHKN) & CHKV)) {
ADD_CYCLE(2);
ea_set_prefetch_before_write();
ea_write_byte(cpu, op&0x3f, 0xff);
return;
}
break;
case 14: /* SGT */
if((CHKN && CHKV && !CHKZ) || (!CHKN && !CHKV && !CHKZ)) {
ADD_CYCLE(2);
ea_set_prefetch_before_write();
ea_write_byte(cpu, op&0x3f, 0xff);
return;
}
break;
case 15: /* SLE */
if(CHKZ || (CHKN && !CHKV) || (!CHKN && CHKV)) {
ADD_CYCLE(2);
ea_set_prefetch_before_write();
ea_write_byte(cpu, op&0x3f, 0xff);
return;
}
break;
}
if(!r) {
ADD_CYCLE(2);
}
ea_set_prefetch_before_write();
ea_write_byte(cpu, op&0x3f, 0x00);
}
