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#include "coreview.h"
#include <cmath>
//////////////////////////////////////////////////////////////////////////////
/// Size of visible view area
#define SC_WIDTH 720
#define SC_HEIGHT 540
//////////////////////////////////////////////////////////////////////////////
CoreView::CoreView(QWidget *parent) : QGraphicsView(parent) {
setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
}
void CoreView::setScene(QGraphicsScene *scene) {
QGraphicsView::setScene(scene);
update_scale();
}
void CoreView::resizeEvent(QResizeEvent *event) {
QGraphicsView::resizeEvent(event);
update_scale();
}
void CoreView::update_scale() {
if (scene() == nullptr)
return; // Skip if we have no scene
// Note: there is somehow three pixels error when viewing so we have to always compensate
const int w = scene()->width() + 3;
const int h = scene()->height() + 3;
qreal scale = 1;
if (height() > h && width() > w) {
if (height() > width()) {
scale = (qreal)width() / w;
} else {
scale = (qreal)height() / h;
}
}
QTransform t;
t.scale(scale, scale);
setTransform(t, false);
}
#define NEW_B(TYPE, VAR, ...) do { \
VAR = new coreview::TYPE(__VA_ARGS__);\
addItem(VAR);\
} while(false)
#define NEW(TYPE, VAR, X, Y, ...) do { \
NEW_B(TYPE, VAR, __VA_ARGS__); \
VAR->setPos(X, Y); \
} while(false)
#define NEW_I(VAR, X, Y, SIG) do { \
NEW(InstructionView, VAR, X, Y); \
connect(machine->core(), SIGNAL(SIG), VAR, SLOT(instruction_update(const machine::Instruction&))); \
} while(false)
CoreViewScene::CoreViewScene(CoreView *view, machine::QtMipsMachine *machine) : QGraphicsScene(view) {
setSceneRect(0, 0, SC_WIDTH, SC_HEIGHT);
// Identification cross (TODO remove)
QPen pen;
pen.setBrush(QBrush(QColor(220, 220, 220)));
addLine(width()/2, 0, width()/2, height(), pen);
addLine(0, height()/2, width(), height()/2, pen);
addRect(0.5, 0.5, width() - 0.5, height() - 0.5, pen);
// TODO remove
// Elements //
// Primary points
NEW(ProgramMemory, mem_program, 90, 240, machine);
NEW(DataMemory, mem_data, 600, 300, machine);
NEW(Registers, regs, 210, 240);
// Fetch stage
NEW(ProgramCounter, ft.pc, 2, 280, machine);
NEW(Latch, ft.latch, 55, 250, machine, 20);
NEW(Adder, ft.adder, 100, 330);
struct coreview::Latch::ConnectorPair pc_latch_pair = ft.latch->new_connector(10);
NEW_B(Constant, ft.adder_4, ft.adder->connector_in_b(), "4");
NEW(Junction, ft.junc_pc, 80, mem_program->connector_address()->y());
NEW(Junction, ft.junc_pc_4, 130, 380);
NEW(Multiplexer, ft.multiplex, 20, 390, 2);
// Decode stage
NEW(LogicBlock, dc.ctl_block, 230, 90, {"Control", "unit"});
dc.ctl_block->setSize(35, 70);
NEW(LogicBlock, dc.sign_ext, 230, 360, {"Sign", "extension"});
NEW(LogicBlock, dc.shift2, 290, 390, "<<2");
NEW(Adder, dc.add, 320, 390);
const coreview::Connector *dc_con_sign_ext = dc.sign_ext->new_connector(1, 0);
NEW(Junction, dc.j_sign_ext, 270, dc_con_sign_ext->y());
NEW(LogicBlock, dc.cmp, 320, 200, "=");
NEW(And, dc.and_branch, 350, 190);
dc.cmp->setSize(24, 12);
NEW(Junction, dc.j_inst_up, 180, 126);
NEW(Junction, dc.j_inst_down, 180, dc_con_sign_ext->y());
// Execute stage
NEW(Alu, alu, 470, 230);
// Memory stage
NEW(Multiplexer, mem_or_reg, 570, 180, 2);
// Connections //
coreview::Connection *con;
// Fetch stage
new_bus(ft.pc->connector_out(), pc_latch_pair.in);
new_bus(pc_latch_pair.out, ft.junc_pc->new_connector(coreview::Connector::AX_X));
new_bus(ft.junc_pc->new_connector(coreview::Connector::AX_Y), ft.adder->connector_in_a());
new_bus(ft.junc_pc->new_connector(coreview::Connector::AX_X), mem_program->connector_address());
new_bus(ft.multiplex->connector_out(), ft.pc->connector_in());
new_bus(ft.adder->connector_out(), ft.junc_pc_4->new_connector(coreview::Connector::AX_Y));
con = new_bus(ft.junc_pc_4->new_connector(coreview::Connector::AX_X), ft.multiplex->connector_in(0));
con->setAxes({CON_AXIS_Y(10)});
// Decode stage
new_bus(dc_con_sign_ext, dc.j_sign_ext->new_connector(coreview::Connector::AX_X));
new_bus(dc.j_sign_ext->new_connector(coreview::Connector::AX_Y), dc.shift2->new_connector(-1, 0));
new_bus(dc.shift2->new_connector(1, 0), dc.add->connector_in_a());
con = new_signal(dc.cmp->new_connector(1, 0), dc.and_branch->connector_in(1));
con->setAxes({CON_AXIS_Y(343)});
con = new_signal(dc.ctl_block->new_connector(1, 0.9), dc.and_branch->connector_in(0));
con->setAxes({CON_AXIS_Y(343)});
dc.instr_bus = new_bus(dc.j_inst_up->new_connector(coreview::Connector::AX_Y), dc.j_inst_down->new_connector(coreview::Connector::AX_Y));
new_bus(dc.j_inst_up->new_connector(coreview::Connector::AX_X), dc.ctl_block->new_connector(-1, 0), 2);
new_bus(dc.j_inst_down->new_connector(coreview::Connector::AX_X), dc.sign_ext->new_connector(-1, 0), 2);
// From decode stage to fetch stage
con = new_signal(dc.and_branch->connector_out(), ft.multiplex->connector_ctl());
con->setAxes({CON_AXIS_Y(365), CON_AXIS_X(490)});
con = new_bus(dc.add->connector_out(), ft.multiplex->connector_in(1));
con->setAxes({CON_AXIS_Y(340), CON_AXIS_X(480), CON_AXIS_Y(10)});
connect(regs, SIGNAL(open_registers()), this, SIGNAL(request_registers()));
connect(mem_program, SIGNAL(open_mem()), this, SIGNAL(request_program_memory()));
connect(mem_data, SIGNAL(open_mem()), this, SIGNAL(request_data_memory()));
}
CoreViewScene::~CoreViewScene() {
for (int i = 0; i < connections.size(); i++)
delete connections[i];
delete ft.pc;
delete ft.latch;
delete ft.adder;
delete ft.adder_4;
delete ft.junc_pc;
delete ft.junc_pc_4;
delete ft.multiplex;
delete dc.ctl_block;
delete dc.sign_ext;
delete dc.shift2;
delete dc.cmp;
delete dc.add;
delete dc.j_sign_ext;
delete dc.and_branch;
delete alu;
delete mem_program;
delete mem_data;
delete regs;
delete mem_or_reg;
}
coreview::Connection *CoreViewScene::new_connection(const coreview::Connector *a, const coreview::Connector *b) {
coreview::Connection *c = new coreview::Connection(a, b);
connections.append(c);
addItem(c);
return c;
}
coreview::Bus *CoreViewScene::new_bus(const coreview::Connector *a, const coreview::Connector *b, unsigned width) {
coreview::Bus *c = new coreview::Bus(a, b, width);
connections.append(c);
addItem(c);
return c;
}
coreview::Signal *CoreViewScene::new_signal(const coreview::Connector *a, const coreview::Connector *b) {
coreview::Signal *c = new coreview::Signal(a, b);
connections.append(c);
addItem(c);
c->setZValue(-1); // hide connections under neath the items
return c;
}
CoreViewSceneSimple::CoreViewSceneSimple(CoreView *view, machine::QtMipsMachine *machine) : CoreViewScene(view, machine) {
NEW(Latch, delay_slot_latch, 160, 50, machine, 150);
}
CoreViewSceneSimple::~CoreViewSceneSimple() {
delete delay_slot_latch;
}
CoreViewScenePipelined::CoreViewScenePipelined(CoreView *view, machine::QtMipsMachine *machine) : CoreViewScene(view, machine) {
NEW(Latch, latch_if_id, 158, 90, machine, 380);
latch_if_id->setTitle("IF/ID");
NEW(Latch, latch_id_ex, 392, 90, machine, 380);
latch_id_ex->setTitle("ID/EX");
NEW(Latch, latch_ex_mem, 536, 90, machine, 380);
latch_ex_mem->setTitle("EX/MEM");
NEW(Latch, latch_mem_wb, 680, 90, machine, 380);
latch_mem_wb->setTitle("MEM/WB");
NEW_I(inst_fetch, 100, 2, instruction_fetched(const machine::Instruction&));
NEW_I(inst_dec, 250, 2, instruction_decoded(const machine::Instruction&));
NEW_I(inst_exec, 400, 2, instruction_executed(const machine::Instruction&));
NEW_I(inst_mem, 540, 2, instruction_memory(const machine::Instruction&));
NEW_I(inst_wrb, 670, 2, instruction_writeback(const machine::Instruction&));
if (machine->config().hazard_unit() != machine::MachineConfig::HU_NONE) {
NEW(LogicBlock, hazard_unit, SC_WIDTH/2, SC_HEIGHT - 15, "Hazard Unit");
hazard_unit->setSize(SC_WIDTH - 100, 12);
}
coreview::Connection *con;
// Fetch stage
struct coreview::Latch::ConnectorPair lp_ft_inst = latch_if_id->new_connector(mem_program->connector_instruction()->y() - latch_if_id->y());
new_bus(mem_program->connector_instruction(), lp_ft_inst.in);
struct coreview::Latch::ConnectorPair lp_ft_pc = latch_if_id->new_connector(370);
new_bus(ft.junc_pc_4->new_connector(coreview::Connector::AX_Y), lp_ft_pc.in);
// Decode stage
//new_bus(lp_ft_inst.out, dc.instr_bus->new_connector(lp_ft_inst.out->point()));
con = new_bus(lp_ft_pc.out, dc.add->connector_in_b());
con->setAxes({CON_AXIS_Y(270)});
}
CoreViewScenePipelined::~CoreViewScenePipelined() {
delete latch_if_id;
delete latch_id_ex;
delete latch_ex_mem;
delete latch_mem_wb;
delete inst_fetch;
delete inst_dec;
delete inst_exec;
delete inst_mem;
delete inst_wrb;
if (hazard_unit != nullptr)
delete hazard_unit;
}
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