4 files changed, 17 insertions, 5 deletions
diff --git a/qtmips_machine/cop0state.cpp b/qtmips_machine/cop0state.cpp
index 35f78d1..1caada1 100644
--- a/qtmips_machine/cop0state.cpp
+++ b/qtmips_machine/cop0state.cpp
@@ -150,7 +150,10 @@ QString Cop0State::cop0reg_name(enum Cop0Registers reg) {
 }
 
 std::uint32_t Cop0State::read_cop0reg_default(enum Cop0Registers reg) const {
-    return cop0reg[(int)reg];
+    std::uint32_t val;
+    val = cop0reg[(int)reg];
+    emit cop0reg_read(reg, val);
+    return val;
 }
 
 void Cop0State::write_cop0reg_default(enum Cop0Registers reg, std::uint32_t value) {
diff --git a/qtmips_machine/cop0state.h b/qtmips_machine/cop0state.h
index 0fd3d3f..a6af9a4 100644
--- a/qtmips_machine/cop0state.h
+++ b/qtmips_machine/cop0state.h
@@ -89,6 +89,7 @@ public:
 
 signals:
     void cop0reg_update(enum Cop0Registers reg, std::uint32_t val);
+    void cop0reg_read(enum Cop0Registers reg, std::uint32_t val) const;
 
 public slots:
     void set_interrupt_signal(uint irq_num, bool active);
diff --git a/qtmips_machine/registers.cpp b/qtmips_machine/registers.cpp
index fa9731a..ed27ec6 100644
--- a/qtmips_machine/registers.cpp
+++ b/qtmips_machine/registers.cpp
@@ -87,25 +87,31 @@ void Registers::pc_abs_jmp_28(std::uint32_t address) {
 }
 
 std::uint32_t Registers::read_gp(std::uint8_t i) const {
+    std::uint32_t value;
     SANITY_ASSERT(i < 32, QString("Trying to read from register ") + QString(i));
     if (!i) // $0 always reads as 0
         return 0;
-    return this->gp[i - 1];
+    value = this->gp[i - 1];
+    emit gp_read(i, value);
+    return value;
 }
 
 void Registers::write_gp(std::uint8_t i, std::uint32_t value) {
     SANITY_ASSERT(i < 32, QString("Trying to write to register ") + QString(i));
     if (i == 0) // Skip write to $0
         return;
-    emit gp_update(i, value);
     this->gp[i - 1] = value;
+    emit gp_update(i, value);
 }
 
 std::uint32_t Registers::read_hi_lo(bool is_hi) const {
+    std::uint32_t value;
     if (is_hi)
-        return hi;
+        value = hi;
     else
-        return lo;
+        value = lo;
+    emit hi_lo_read(is_hi, value);
+    return value;
 }
 
 void Registers::write_hi_lo(bool is_hi, std::uint32_t value) {
diff --git a/qtmips_machine/registers.h b/qtmips_machine/registers.h
index a4f7aa8..63aa266 100644
--- a/qtmips_machine/registers.h
+++ b/qtmips_machine/registers.h
@@ -67,6 +67,8 @@ signals:
     void pc_update(std::uint32_t val);
     void gp_update(std::uint8_t i, std::uint32_t val);
     void hi_lo_update(bool hi, std::uint32_t val);
+    void gp_read(std::uint8_t i, std::uint32_t val) const;
+    void hi_lo_read(bool hi, std::uint32_t val) const;
 
 private:
     std::uint32_t gp[31]; // general-purpose registers ($0 is intentionally skipped)