Test pipelined core

6 files changed, 93 insertions, 20 deletions

diff --git a/qtmips_machine/core.cpp b/qtmips_machine/core.cpp
index d86a6f4..75690a3 100644
--- a/qtmips_machine/core.cpp
+++ b/qtmips_machine/core.cpp
@@ -163,14 +163,35 @@ void CoreSingle::step() {
 
 CorePipelined::CorePipelined(Registers *regs, MemoryAccess *mem) : \
     Core(regs, mem) {
-    // Nothing to do
+    // Initialize to NOPE //
+    // dtFetch
+    dt_f.inst = Instruction(0x00);
+    // dtDecode
+    dt_d.inst = dt_f.inst;
+    dt_d.mem2reg = false;
+    dt_d.memwrite = false;
+    dt_d.alusrc = false;
+    dt_d.regd = false;
+    dt_d.regwrite = false;
+    dt_d.branch = false;
+    dt_d.aluop = ALU_OP_SLL;
+    dt_d.val_rs = 0;
+    dt_d.val_rt = 0;
+    // dtExecute
+    dt_e.regwrite = dt_d.regwrite;
+    dt_e.rwrite = dt_d.regwrite;
+    dt_e.alu_val = 0;
+    // dtMemory
+    dt_m.regwrite = dt_e.regwrite;
+    dt_m.rwrite = dt_e.rwrite;
+    dt_m.alu_val = dt_e.alu_val;
 }
 
 void CorePipelined::step() {
     // TODO implement pipelined
-    struct dtFetch f = fetch();
-    struct dtDecode d = decode(f);
-    struct dtExecute e = execute(d);
-    struct dtMemory m =memory(e);
-    writeback(m);
+    writeback(dt_m);
+    dt_m =memory(dt_e);
+    dt_e = execute(dt_d);
+    dt_d = decode(dt_f);
+    dt_f = fetch();
 }
diff --git a/qtmips_machine/core.h b/qtmips_machine/core.h
index 9829741..b566a38 100644
--- a/qtmips_machine/core.h
+++ b/qtmips_machine/core.h
@@ -69,6 +69,12 @@ public:
     CorePipelined(Registers *regs, MemoryAccess *mem);
 
     void step();
+
+private:
+    struct Core::dtFetch dt_f;
+    struct Core::dtDecode dt_d;
+    struct Core::dtExecute dt_e;
+    struct Core::dtMemory dt_m;
 };
 
 #endif // CORE_H
diff --git a/qtmips_machine/instruction.cpp b/qtmips_machine/instruction.cpp
index 58b6ffa..b6abebc 100644
--- a/qtmips_machine/instruction.cpp
+++ b/qtmips_machine/instruction.cpp
@@ -16,6 +16,13 @@ const struct InstructionMap instruction_map[] = {
     IM_UNKNOWN,
     IM_UNKNOWN,
     {"ADDI"},
+    {"ADDIU"},
+    {"SLTI"},
+    {"SLTIU"},
+    {"ANDI"},
+    {"ORI"},
+    {"XORI"},
+    {"LUI"},
     IM_UNKNOWN,
     IM_UNKNOWN,
     IM_UNKNOWN,
@@ -116,3 +123,9 @@ bool Instruction::operator==(const Instruction &c) const {
 bool Instruction::operator!=(const Instruction &c) const {
     return ! this->operator==(c);
 }
+
+Instruction &Instruction::operator=(const Instruction &c) {
+    if (this != &c)
+        this->dt = c.data();
+    return *this;
+}
diff --git a/qtmips_machine/instruction.h b/qtmips_machine/instruction.h
index aa53973..0a87826 100644
--- a/qtmips_machine/instruction.h
+++ b/qtmips_machine/instruction.h
@@ -28,6 +28,7 @@ public:
 
     bool operator==(const Instruction &c) const;
     bool operator!=(const Instruction &c) const;
+    Instruction &operator=(const Instruction &c);
 
 private:
     std::uint32_t dt;
diff --git a/qtmips_machine/tests/testcore.cpp b/qtmips_machine/tests/testcore.cpp
index 43d4c90..31f61ab 100644
--- a/qtmips_machine/tests/testcore.cpp
+++ b/qtmips_machine/tests/testcore.cpp
@@ -1,7 +1,7 @@
 #include "tst_machine.h"
 #include "core.h"
 
-void MachineTests::core_regs_data() {
+static void core_regs_data() {
     QTest::addColumn<Instruction>("i");
     QTest::addColumn<Registers>("init");
     QTest::addColumn<Registers>("res");
@@ -123,28 +123,58 @@ void MachineTests::core_regs_data() {
     }
 }
 
+void MachineTests::singlecore_regs_data() {
+    core_regs_data();
+}
+
+void MachineTests::pipecore_regs_data() {
+    core_regs_data();
+}
+
 #include <iostream>
 using namespace std;
 
-void MachineTests::core_regs() {
+void MachineTests::singlecore_regs() {
     QFETCH(Instruction, i);
     QFETCH(Registers, init);
     QFETCH(Registers, res);
 
     Memory mem; // Just memory (it shouldn't be used here except instruction)
     mem.write_word(res.read_pc(), i.data()); // Store single instruction (anything else should be 0 so NOP effectively)
+    Memory mem_used(mem); // Create memory copy
+
+    CoreSingle core(&init, &mem_used);
+    core.step(); // Single step should be enought as this is risc without pipeline
 
-    // Test on non-piplined
     res.pc_inc(); // We did single step	so increment program counter accordingly
-    Memory mem_single(mem); // Create memory copy
-    Registers regs_single(init); // Create registers copy
-    CoreSingle core_single(&regs_single, &mem_single);
-    core_single.step(); // Single step should be enought as this is risc without pipeline
-    cout << "well:" << regs_single.read_gp(26) << endl;
-    QCOMPARE(regs_single, res); // After doing changes from initial state this should be same state as in case of passed expected result
-    QCOMPARE(mem, mem_single); // There should be no change in memory
-
-    // TODO on pipelined core
+    QCOMPARE(init, res); // After doing changes from initial state this should be same state as in case of passed expected result
+    QCOMPARE(mem, mem_used); // There should be no change in memory
+}
+
+void MachineTests::pipecore_regs() {
+    QFETCH(Instruction, i);
+    QFETCH(Registers, init);
+    QFETCH(Registers, res);
+
+    Memory mem; // Just memory (it shouldn't be used here except instruction)
+    mem.write_word(res.read_pc(), i.data()); // Store single instruction (anything else should be 0 so NOP effectively)
+
+    Memory mem_used(mem);
+    Registers regs_used(init);
+
+    res.pc_jmp(0x14);
+
+    CorePipelined core(&regs_used, &mem_used);
+    for (int i = 0; i < 4; i++) {
+        core.step(); // Fire steps for five pipelines stages
+        init.pc_inc();
+        QCOMPARE(init, regs_used); // Untill writeback there should be no change in registers
+    }
+    core.step();
+
+    //cout << "well:" << init.read_gp(26) << ":" << regs_used.read_gp(26) << endl;
+    QCOMPARE(regs_used, res); // After doing changes from initial state this should be same state as in case of passed expected result
+    QCOMPARE(mem, mem_used); // There should be no change in memory
 }
 
 void MachineTests::core_mem_data() {
diff --git a/qtmips_machine/tests/tst_machine.h b/qtmips_machine/tests/tst_machine.h
index 35104c4..3feaddd 100644
--- a/qtmips_machine/tests/tst_machine.h
+++ b/qtmips_machine/tests/tst_machine.h
@@ -30,8 +30,10 @@ private Q_SLOTS:
     void alu_except();
     void alu_except_data();
     // Core
-    void core_regs();
-    void core_regs_data();
+    void singlecore_regs();
+    void singlecore_regs_data();
+    void pipecore_regs();
+    void pipecore_regs_data();
     void core_mem();
     void core_mem_data();
 };