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#include <iostream>
#include <assert.h>
#include <stdio.h>
#include "emulator.h"
#include "program_loader.h"
#include "instruction.h"
#include "program.h"
#include "register_address.h"
emulator::write::write(
register_address addr,
value * val) :
m_addr(addr),
m_val(val)
{ }
emulator::emulator(
program_loader * loader,
int num_temp_regs,
int num_const_regs,
int num_out_regs,
int num_input_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),
m_input_regs(num_input_regs, new float_value())
{ }
bool
emulator::run()
{
program * p = m_loader->load();
if (!p) {
return false;
}
m_immediate_regs = p->m_immediate_regs;
m_private_regs = std::vector<value *>(p->num_private_regs);
std::vector<instruction *>::iterator it;
for(it = p->m_instructions.begin();
it < p->m_instructions.end(); ++it) {
(*it)->execute(*this);
while (!m_write_queue.empty()) {
write w = m_write_queue.front();
set_value(w.m_addr, w.m_val);
m_write_queue.pop();
}
}
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);
}
for(it = m_input_regs.begin(); it < m_input_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:
if (index < m_temp_regs.size() && m_temp_regs[index]) {
return m_temp_regs[index]->clone();
} else {
/* The Temp register has never been written, which
* means it is actually an input register */
return m_input_regs[index]->clone();
}
break;
case REGISTER_TYPE_CONST:
return get_const_value(m_const_regs, index, addr);
break;
case REGISTER_TYPE_IN:
return get_const_value(m_input_regs, index, addr);
break;
case REGISTER_TYPE_OUT: return m_out_regs[index]->clone();
case REGISTER_TYPE_IMMEDIATE: return m_immediate_regs[index]->clone();
case REGISTER_TYPE_PRIVATE: return m_private_regs[index]->clone();
case REGISTER_TYPE_NONE: return NULL;
default:
std::cerr << __FUNCTION__ << " unknown register type: "
<< addr.m_type << "\n";
return NULL;
}
}
value *
emulator::get_const_value(
std::vector<float_value *> & registers,
unsigned int index,
register_address addr)
{
if (index >= registers.size()) {
return NULL;
}
float_value * val = registers[index];
if (val->m_has_value) {
return new float_value(*val);
} else {
return new const_value(addr, val);
}
}
void
emulator::set_value(
register_address addr,
value * val)
{
unsigned int index = addr.to_int();
switch(addr.m_type) {
case REGISTER_TYPE_TEMP:
set_value(m_temp_regs, index, val);
break;
case REGISTER_TYPE_OUT:
set_value(m_out_regs, index, val);
break;
case REGISTER_TYPE_PRIVATE:
/*In theory, these registers should only be written once. */
set_value(m_private_regs, index, val);
break;
case REGISTER_TYPE_NONE:
/* Do nothing. */
break;
default:
assert(0);
}
}
void
emulator::set_value(
std::vector<value *> & vector,
unsigned int index,
value * val)
{
if (index >= vector.size()) {
std::cerr << __FUNCTION__ << ": Index out of bounds\n";
return;
}
delete vector[index];
vector[index] = val;
}
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();
}
void
emulator::queue_write(
register_address addr,
value * val)
{
m_write_queue.push(write(addr, val));
}
void
emulator::dump_regs()
{
dump_regs(m_temp_regs, REGISTER_TYPE_TEMP);
dump_regs(m_const_regs, REGISTER_TYPE_CONST);
dump_regs(m_out_regs, REGISTER_TYPE_OUT);
dump_regs(m_private_regs, REGISTER_TYPE_PRIVATE);
dump_regs(m_immediate_regs, REGISTER_TYPE_IMMEDIATE);
dump_regs(m_input_regs, REGISTER_TYPE_IN);
}
void
emulator::dump_regs(
std::vector<value *> & registers,
enum register_type type)
{
unsigned int i;
for (i = 0; i < registers.size(); i++) {
print_reg(type, i, registers[i]);
}
}
void
emulator::dump_regs(
std::vector<float_value *> & registers,
enum register_type type)
{
unsigned int i;
for (i = 0; i < registers.size(); i++) {
print_reg(type, i, registers[i]);
}
}
void
emulator::print_reg(
enum register_type type,
unsigned int index,
value * val)
{
if (val) {
fprintf(stderr, "%s=%s\n",
register_address(type, index).to_string().c_str(),
val->to_string().c_str());
}
}
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