6 files changed, 26 insertions, 0 deletions

diff --git a/src/core/arm/dynarmic/arm_dynarmic_32.cpp b/src/core/arm/dynarmic/arm_dynarmic_32.cpp
index 8aaf11eee..0831dd5d2 100644
--- a/src/core/arm/dynarmic/arm_dynarmic_32.cpp
+++ b/src/core/arm/dynarmic/arm_dynarmic_32.cpp
@@ -181,6 +181,9 @@ std::shared_ptr<Dynarmic::A32::Jit> ARM_Dynarmic_32::MakeJit(Common::PageTable&
         if (Settings::values.cpuopt_unsafe_reduce_fp_error) {
             config.optimizations |= Dynarmic::OptimizationFlag::Unsafe_ReducedErrorFP;
         }
+        if (Settings::values.cpuopt_unsafe_inaccurate_nan) {
+            config.optimizations |= Dynarmic::OptimizationFlag::Unsafe_InaccurateNaN;
+        }
     }
 
     return std::make_unique<Dynarmic::A32::Jit>(config);
diff --git a/src/core/arm/dynarmic/arm_dynarmic_64.cpp b/src/core/arm/dynarmic/arm_dynarmic_64.cpp
index d2e1dc724..4c5ebca22 100644
--- a/src/core/arm/dynarmic/arm_dynarmic_64.cpp
+++ b/src/core/arm/dynarmic/arm_dynarmic_64.cpp
@@ -212,6 +212,9 @@ std::shared_ptr<Dynarmic::A64::Jit> ARM_Dynarmic_64::MakeJit(Common::PageTable&
         if (Settings::values.cpuopt_unsafe_reduce_fp_error) {
             config.optimizations |= Dynarmic::OptimizationFlag::Unsafe_ReducedErrorFP;
         }
+        if (Settings::values.cpuopt_unsafe_inaccurate_nan) {
+            config.optimizations |= Dynarmic::OptimizationFlag::Unsafe_InaccurateNaN;
+        }
     }
 
     return std::make_shared<Dynarmic::A64::Jit>(config);
diff --git a/src/core/settings.h b/src/core/settings.h
index 1cb7ff7f5..a324530bd 100644
--- a/src/core/settings.h
+++ b/src/core/settings.h
@@ -131,6 +131,7 @@ struct Values {
 
     bool cpuopt_unsafe_unfuse_fma;
     bool cpuopt_unsafe_reduce_fp_error;
+    bool cpuopt_unsafe_inaccurate_nan;
 
     // Renderer
     Setting<RendererBackend> renderer_backend;
diff --git a/src/yuzu/configuration/config.cpp b/src/yuzu/configuration/config.cpp
index 34c2a5f8b..43cd11ba0 100644
--- a/src/yuzu/configuration/config.cpp
+++ b/src/yuzu/configuration/config.cpp
@@ -764,6 +764,8 @@ void Config::ReadCpuValues() {
             ReadSetting(QStringLiteral("cpuopt_unsafe_unfuse_fma"), true).toBool();
         Settings::values.cpuopt_unsafe_reduce_fp_error =
             ReadSetting(QStringLiteral("cpuopt_unsafe_reduce_fp_error"), true).toBool();
+        Settings::values.cpuopt_unsafe_inaccurate_nan =
+            ReadSetting(QStringLiteral("cpuopt_unsafe_inaccurate_nan"), true).toBool();
     }
 
     qt_config->endGroup();
@@ -1327,6 +1329,8 @@ void Config::SaveCpuValues() {
                      Settings::values.cpuopt_unsafe_unfuse_fma, true);
         WriteSetting(QStringLiteral("cpuopt_unsafe_reduce_fp_error"),
                      Settings::values.cpuopt_unsafe_reduce_fp_error, true);
+        WriteSetting(QStringLiteral("cpuopt_unsafe_inaccurate_nan"),
+                     Settings::values.cpuopt_unsafe_inaccurate_nan, true);
     }
 
     qt_config->endGroup();
diff --git a/src/yuzu/configuration/configure_cpu.cpp b/src/yuzu/configuration/configure_cpu.cpp
index 37fcd6adc..d055cbd60 100644
--- a/src/yuzu/configuration/configure_cpu.cpp
+++ b/src/yuzu/configuration/configure_cpu.cpp
@@ -36,6 +36,8 @@ void ConfigureCpu::SetConfiguration() {
     ui->cpuopt_unsafe_unfuse_fma->setChecked(Settings::values.cpuopt_unsafe_unfuse_fma);
     ui->cpuopt_unsafe_reduce_fp_error->setEnabled(runtime_lock);
     ui->cpuopt_unsafe_reduce_fp_error->setChecked(Settings::values.cpuopt_unsafe_reduce_fp_error);
+    ui->cpuopt_unsafe_inaccurate_nan->setEnabled(runtime_lock);
+    ui->cpuopt_unsafe_inaccurate_nan->setChecked(Settings::values.cpuopt_unsafe_inaccurate_nan);
 }
 
 void ConfigureCpu::AccuracyUpdated(int index) {
@@ -61,6 +63,7 @@ void ConfigureCpu::ApplyConfiguration() {
         static_cast<Settings::CPUAccuracy>(ui->accuracy->currentIndex());
     Settings::values.cpuopt_unsafe_unfuse_fma = ui->cpuopt_unsafe_unfuse_fma->isChecked();
     Settings::values.cpuopt_unsafe_reduce_fp_error = ui->cpuopt_unsafe_reduce_fp_error->isChecked();
+    Settings::values.cpuopt_unsafe_inaccurate_nan = ui->cpuopt_unsafe_inaccurate_nan->isChecked();
 }
 
 void ConfigureCpu::changeEvent(QEvent* event) {
diff --git a/src/yuzu/configuration/configure_cpu.ui b/src/yuzu/configuration/configure_cpu.ui
index ebdd2e6e9..bcd0962e9 100644
--- a/src/yuzu/configuration/configure_cpu.ui
+++ b/src/yuzu/configuration/configure_cpu.ui
@@ -109,6 +109,18 @@
           </property>
          </widget>
         </item>
+        <item>
+         <widget class="QCheckBox" name="cpuopt_unsafe_inaccurate_nan">
+          <property name="text">
+           <string>Inaccurate NaN handling</string>
+          </property>
+          <property name="toolTip">
+           <string>
+            &lt;div&gt;This option improves speed by removing NaN checking. Please note this also reduces accuracy of certain floating-point instructions.&lt;/div&gt;
+           </string>
+          </property>
+         </widget>
+        </item>
        </layout>
       </widget>
      </item>