static int tms_execute(int num_cycles)
{
tms_icount = num_cycles;
while(tms_icount > 0)
{
UINT16 ppc;
// handle block repeat
if (tms.pmst.braf)
{
if (tms.pc == tms.paer)
{
if (tms.brcr > 0)
{
CHANGE_PC(tms.pasr);
}
tms.brcr--;
if (tms.brcr <= 0)
{
tms.pmst.braf = 0;
}
}
}
ppc = tms.pc;
CALL_DEBUGGER(tms.pc);
tms.op = ROPCODE();
tms32051_opcode_table[tms.op >> 8]();
// handle single repeat
if (tms.rptc > 0)
{
if (ppc == tms.rpt_end)
{
CHANGE_PC(tms.rpt_start);
tms.rptc--;
}
}
else
{
tms.rptc = 0;
}
tms.timer.psc--;
if (tms.timer.psc <= 0)
{
tms.timer.psc = tms.timer.tddr;
tms.timer.tim--;
if (tms.timer.tim <= 0)
{
// reset timer
tms.timer.tim = tms.timer.prd;
tms_interrupt(INTERRUPT_TINT);
}
}
}
return num_cycles - tms_icount;
}
static CPU_EXECUTE( tms )
{
tms32051_state *cpustate = get_safe_token(device);
while(cpustate->icount > 0)
{
UINT16 ppc;
// handle block repeat
if (cpustate->pmst.braf)
{
if (cpustate->pc == cpustate->paer)
{
if (cpustate->brcr > 0)
{
CHANGE_PC(cpustate, cpustate->pasr);
}
cpustate->brcr--;
if (cpustate->brcr <= 0)
{
cpustate->pmst.braf = 0;
}
}
}
ppc = cpustate->pc;
debugger_instruction_hook(device, cpustate->pc);
cpustate->op = ROPCODE(cpustate);
tms32051_opcode_table[cpustate->op >> 8](cpustate);
// handle single repeat
if (cpustate->rptc > 0)
{
if (ppc == cpustate->rpt_end)
{
CHANGE_PC(cpustate, cpustate->rpt_start);
cpustate->rptc--;
}
}
else
{
cpustate->rptc = 0;
}
cpustate->timer.psc--;
if (cpustate->timer.psc <= 0)
{
cpustate->timer.psc = cpustate->timer.tddr;
cpustate->timer.tim--;
if (cpustate->timer.tim <= 0)
{
// reset timer
cpustate->timer.tim = cpustate->timer.prd;
tms_interrupt(cpustate, INTERRUPT_TINT);
}
}
}
}
