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#include <iostream>
#include <assert.h>
#include "emulator.h"
#include "program_loader.h"
#include "instruction.h"
#include "program.h"
#include "register_address.h"
emulator::emulator(
program_loader * loader,
int num_temp_regs,
int num_const_regs,
int num_out_regs)
:
m_loader(loader),
m_temp_regs(num_temp_regs),
m_const_regs(num_const_regs, new float_value()),
m_out_regs(num_out_regs)
{ }
bool
emulator::run()
{
program * p = m_loader->load();
if (!p) {
std::cerr << "Could not load program\n";
return false;
}
m_immediate_regs = p->m_immediate_regs;
std::vector<instruction *>::iterator it;
for(it = p->m_instructions.begin();
it < p->m_instructions.end(); ++it) {
(*it)->execute(*this);
}
return true;
}
void
emulator::set_constants(float value)
{
std::vector<float_value *>::iterator it;
for(it = m_const_regs.begin(); it < m_const_regs.end(); ++it) {
(*it)->set_value(value);
}
}
value *
emulator::get_value(register_address addr)
{
unsigned int index = addr.to_int();
switch(addr.m_type) {
case REGISTER_TYPE_TEMP: return m_temp_regs[index]->clone();
case REGISTER_TYPE_CONST:
{
float_value * val = m_const_regs[index];
if (val->m_has_value) {
return new float_value(*val);
} else {
return new const_value(addr, val);
}
}
case REGISTER_TYPE_OUT: return m_out_regs[index]->clone();
case REGISTER_TYPE_IMMEDIATE: return m_immediate_regs[index]->clone();
default:
assert(0);
return NULL;
}
}
void
emulator::set_value(
register_address addr,
value * val)
{
unsigned int index = addr.to_int();
switch(addr.m_type) {
case REGISTER_TYPE_TEMP:
delete m_temp_regs[index];
m_temp_regs[index] = val;
break;
case REGISTER_TYPE_OUT:
delete m_out_regs[index];
m_out_regs[index] = val;
break;
default:
assert(0);
}
}
value *
emulator::get_output_value(unsigned int index)
{
if (index >= m_out_regs.size() || !m_out_regs[index]) {
return NULL;
}
return m_out_regs[index]->simplify();
}
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