From 836ec9176aee5558c69764df46aa8347fca2e3d2 Mon Sep 17 00:00:00 2001
From: MerryMage <MerryMage@users.noreply.github.com>
Date: Sun, 16 Aug 2020 13:19:55 +0100
Subject: dynarmic: Add unsafe optimizations

---
 src/yuzu/configuration/config.cpp        | 10 ++++++
 src/yuzu/configuration/configure_cpu.cpp | 17 ++++++++++-
 src/yuzu/configuration/configure_cpu.h   |  1 +
 src/yuzu/configuration/configure_cpu.ui  | 52 ++++++++++++++++++++++++++++++++
 4 files changed, 79 insertions(+), 1 deletion(-)

(limited to 'src/yuzu/configuration')

diff --git a/src/yuzu/configuration/config.cpp b/src/yuzu/configuration/config.cpp
index cb71b8d11..d8bb86421 100644
--- a/src/yuzu/configuration/config.cpp
+++ b/src/yuzu/configuration/config.cpp
@@ -638,6 +638,11 @@ void Config::ReadCpuValues() {
             ReadSetting(QStringLiteral("cpuopt_misc_ir"), true).toBool();
         Settings::values.cpuopt_reduce_misalign_checks =
             ReadSetting(QStringLiteral("cpuopt_reduce_misalign_checks"), true).toBool();
+
+        Settings::values.cpuopt_unsafe_unfuse_fma =
+            ReadSetting(QStringLiteral("cpuopt_unsafe_unfuse_fma"), true).toBool();
+        Settings::values.cpuopt_unsafe_reduce_fp_error =
+            ReadSetting(QStringLiteral("cpuopt_unsafe_reduce_fp_error"), true).toBool();
     }
 
     qt_config->endGroup();
@@ -1135,6 +1140,11 @@ void Config::SaveCpuValues() {
         WriteSetting(QStringLiteral("cpuopt_misc_ir"), Settings::values.cpuopt_misc_ir, true);
         WriteSetting(QStringLiteral("cpuopt_reduce_misalign_checks"),
                      Settings::values.cpuopt_reduce_misalign_checks, true);
+
+        WriteSetting(QStringLiteral("cpuopt_unsafe_unfuse_fma"),
+                     Settings::values.cpuopt_unsafe_unfuse_fma, true);
+        WriteSetting(QStringLiteral("cpuopt_unsafe_reduce_fp_error"),
+                     Settings::values.cpuopt_unsafe_reduce_fp_error, true);
     }
 
     qt_config->endGroup();
diff --git a/src/yuzu/configuration/configure_cpu.cpp b/src/yuzu/configuration/configure_cpu.cpp
index 7493e5ffb..37fcd6adc 100644
--- a/src/yuzu/configuration/configure_cpu.cpp
+++ b/src/yuzu/configuration/configure_cpu.cpp
@@ -19,6 +19,8 @@ ConfigureCpu::ConfigureCpu(QWidget* parent) : QWidget(parent), ui(new Ui::Config
 
     connect(ui->accuracy, qOverload<int>(&QComboBox::activated), this,
             &ConfigureCpu::AccuracyUpdated);
+    connect(ui->accuracy, qOverload<int>(&QComboBox::currentIndexChanged), this,
+            &ConfigureCpu::UpdateGroup);
 }
 
 ConfigureCpu::~ConfigureCpu() = default;
@@ -28,6 +30,12 @@ void ConfigureCpu::SetConfiguration() {
 
     ui->accuracy->setEnabled(runtime_lock);
     ui->accuracy->setCurrentIndex(static_cast<int>(Settings::values.cpu_accuracy));
+    UpdateGroup(static_cast<int>(Settings::values.cpu_accuracy));
+
+    ui->cpuopt_unsafe_unfuse_fma->setEnabled(runtime_lock);
+    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);
 }
 
 void ConfigureCpu::AccuracyUpdated(int index) {
@@ -38,14 +46,21 @@ void ConfigureCpu::AccuracyUpdated(int index) {
                                                  QMessageBox::Yes | QMessageBox::No);
         if (result == QMessageBox::No) {
             ui->accuracy->setCurrentIndex(static_cast<int>(Settings::CPUAccuracy::Accurate));
-            return;
+            UpdateGroup(static_cast<int>(Settings::CPUAccuracy::Accurate));
         }
     }
 }
 
+void ConfigureCpu::UpdateGroup(int index) {
+    ui->unsafe_group->setVisible(static_cast<Settings::CPUAccuracy>(index) ==
+                                 Settings::CPUAccuracy::Unsafe);
+}
+
 void ConfigureCpu::ApplyConfiguration() {
     Settings::values.cpu_accuracy =
         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();
 }
 
 void ConfigureCpu::changeEvent(QEvent* event) {
diff --git a/src/yuzu/configuration/configure_cpu.h b/src/yuzu/configuration/configure_cpu.h
index e4741d3a4..3c5683d81 100644
--- a/src/yuzu/configuration/configure_cpu.h
+++ b/src/yuzu/configuration/configure_cpu.h
@@ -26,6 +26,7 @@ private:
     void RetranslateUI();
 
     void AccuracyUpdated(int index);
+    void UpdateGroup(int index);
 
     void SetConfiguration();
 
diff --git a/src/yuzu/configuration/configure_cpu.ui b/src/yuzu/configuration/configure_cpu.ui
index bf6ea79bb..ebdd2e6e9 100644
--- a/src/yuzu/configuration/configure_cpu.ui
+++ b/src/yuzu/configuration/configure_cpu.ui
@@ -38,6 +38,11 @@
               <string>Accurate</string>
              </property>
             </item>
+            <item>
+             <property name="text">
+              <string>Unsafe</string>
+             </property>
+            </item>
             <item>
              <property name="text">
               <string>Enable Debug Mode</string>
@@ -62,6 +67,53 @@
      </item>
     </layout>
    </item>
+   <item>
+    <layout class="QVBoxLayout">
+     <item>
+      <widget class="QGroupBox" name="unsafe_group">
+       <property name="title">
+        <string>Unsafe CPU Optimization Settings</string>
+       </property>
+       <layout class="QVBoxLayout">
+        <item>
+         <widget class="QLabel">
+          <property name="wordWrap">
+            <bool>1</bool>
+          </property>
+          <property name="text">
+           <string>These settings reduce accuracy for speed.</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QCheckBox" name="cpuopt_unsafe_unfuse_fma">
+          <property name="text">
+           <string>Unfuse FMA (improve performance on CPUs without FMA)</string>
+          </property>
+          <property name="toolTip">
+           <string>
+            &lt;div&gt;This option improves speed by reducing accuracy of fused-multiply-add instructions on CPUs without native FMA support.&lt;/div&gt;
+           </string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QCheckBox" name="cpuopt_unsafe_reduce_fp_error">
+          <property name="text">
+           <string>Faster FRSQRTE and FRECPE</string>
+          </property>
+          <property name="toolTip">
+           <string>
+            &lt;div&gt;This option improves the speed of some approximate floating-point functions by using less accurate native approximations.&lt;/div&gt;
+           </string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </widget>
+     </item>
+    </layout>
+   </item>
    <item>
     <spacer name="verticalSpacer">
      <property name="orientation">
-- 
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