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[Soft-Float] - Initial Interpreter Implementation of Ps2's floating p…
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…oint unit specification.

This Pull Request implements the first take ever on real Soft-Float support in PCSX2.

This work is a combination or several efforts and researches done prior.

Credits:

- https://www.gregorygaines.com/blog/emulating-ps2-floating-point-nums-ieee-754-diffs-part-1/

- https://github.com/GitHubProUser67/MultiServer3/blob/main/BackendServices/CastleLibrary/EmotionEngine.Emulator/Ps2Float.cs

- https://github.com/Goatman13/pcsx2/tree/accurate_int_add_sub

- PCSX2 Team for their help and support in this massive journey.

This pull request should be tested with every games requiring a clamping/rounding mode (cf: GameDatabase).

Currently, this PR fixes on the interpreters:

- #354

- #11507

- #10519

- #8068

- #7642

- #5257

This is important to note, that this implementation, while technically fixing Gran Turismo 4 and Klonoa 2, makes the games crash due to very high floats being passed in the emu code, and failing at some points later in the process. This has not yet been ironed-out.

Other than that, this sets the floor for Soft-Float in PCSX2, a long awaited contribution.
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@GitHubProUser67
GitHubProUser67 committed Nov 12, 2024
1 parent eeb9193 commit de047ea
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Showing 14 changed files with 2,207 additions and 655 deletions.
10 changes: 10 additions & 0 deletions pcsx2-qt/Settings/AdvancedSettingsWidget.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,16 @@ AdvancedSettingsWidget::AdvancedSettingsWidget(SettingsWindow* dialog, QWidget*
connect(m_ui.vu0ClampMode, QOverload<int>::of(&QComboBox::currentIndexChanged), [this](int index) { setClampingMode(0, index); });
connect(m_ui.vu1ClampMode, QOverload<int>::of(&QComboBox::currentIndexChanged), [this](int index) { setClampingMode(1, index); });

SettingWidgetBinder::BindWidgetToBoolSetting(sif, m_ui.eeSoftAddSub, "EmuCore/CPU/Recompiler", "fpuSoftAddSub", false);
SettingWidgetBinder::BindWidgetToBoolSetting(sif, m_ui.eeSoftMulDiv, "EmuCore/CPU/Recompiler", "fpuSoftMulDiv", false);
SettingWidgetBinder::BindWidgetToBoolSetting(sif, m_ui.eeSoftSqrt, "EmuCore/CPU/Recompiler", "fpuSoftSqrt", false);
SettingWidgetBinder::BindWidgetToBoolSetting(sif, m_ui.vu0SoftAddSub, "EmuCore/CPU/Recompiler", "vu0SoftAddSub", false);
SettingWidgetBinder::BindWidgetToBoolSetting(sif, m_ui.vu0SoftMulDiv, "EmuCore/CPU/Recompiler", "vu0SoftMulDiv", false);
SettingWidgetBinder::BindWidgetToBoolSetting(sif, m_ui.vu0SoftSqrt, "EmuCore/CPU/Recompiler", "vu0SoftSqrt", false);
SettingWidgetBinder::BindWidgetToBoolSetting(sif, m_ui.vu1SoftAddSub, "EmuCore/CPU/Recompiler", "vu1SoftAddSub", false);
SettingWidgetBinder::BindWidgetToBoolSetting(sif, m_ui.vu1SoftMulDiv, "EmuCore/CPU/Recompiler", "vu1SoftMulDiv", false);
SettingWidgetBinder::BindWidgetToBoolSetting(sif, m_ui.vu1SoftSqrt, "EmuCore/CPU/Recompiler", "vu1SoftSqrt", false);

SettingWidgetBinder::BindWidgetToBoolSetting(sif, m_ui.iopRecompiler, "EmuCore/CPU/Recompiler", "EnableIOP", true);

SettingWidgetBinder::BindWidgetToBoolSetting(sif, m_ui.gameFixes, "EmuCore", "EnableGameFixes", true);
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294 changes: 192 additions & 102 deletions pcsx2-qt/Settings/AdvancedSettingsWidget.ui
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Original file line number Diff line number Diff line change
Expand Up @@ -33,8 +33,8 @@
<rect>
<x>0</x>
<y>-447</y>
<width>790</width>
<height>1049</height>
<width>793</width>
<height>1283</height>
</rect>
</property>
<layout class="QVBoxLayout" name="verticalLayout">
Expand Down Expand Up @@ -94,10 +94,10 @@
</item>
</widget>
</item>
<item row="1" column="0">
<widget class="QLabel" name="eeDivRoundingLabel">
<item row="2" column="0">
<widget class="QLabel" name="eeClampLabel">
<property name="text">
<string extracomment="Rounding refers here to the mathematical term.">Division Rounding Mode:</string>
<string extracomment="Clamping: Forcing out of bounds things in bounds by changing them to the closest possible value. In this case, this refers to clamping large PS2 floating point values (which map to infinity or NaN in PCs' IEEE754 floats) to non-infinite ones.">Clamping Mode:</string>
</property>
</widget>
</item>
Expand Down Expand Up @@ -125,38 +125,7 @@
</item>
</widget>
</item>
<item row="2" column="0">
<widget class="QLabel" name="eeClampLabel">
<property name="text">
<string extracomment="Clamping: Forcing out of bounds things in bounds by changing them to the closest possible value. In this case, this refers to clamping large PS2 floating point values (which map to infinity or NaN in PCs' IEEE754 floats) to non-infinite ones.">Clamping Mode:</string>
</property>
</widget>
</item>
<item row="2" column="1">
<widget class="QComboBox" name="eeClampMode">
<item>
<property name="text">
<string comment="ClampMode">None</string>
</property>
</item>
<item>
<property name="text">
<string>Normal (Default)</string>
</property>
</item>
<item>
<property name="text">
<string extracomment="Sign: refers here to the mathematical meaning (plus/minus).">Extra + Preserve Sign</string>
</property>
</item>
<item>
<property name="text">
<string>Full</string>
</property>
</item>
</widget>
</item>
<item row="3" column="0" colspan="2">
<item row="4" column="0" colspan="2">
<layout class="QGridLayout" name="eeSettingsMisc">
<item row="1" column="0">
<widget class="QCheckBox" name="eeWaitLoopDetection">
Expand Down Expand Up @@ -208,6 +177,67 @@
</widget>
</item>
</layout>
</item>
<item row="2" column="1">
<widget class="QComboBox" name="eeClampMode">
<item>
<property name="text">
<string comment="ClampMode">None</string>
</property>
</item>
<item>
<property name="text">
<string>Normal (Default)</string>
</property>
</item>
<item>
<property name="text">
<string extracomment="Sign: refers here to the mathematical meaning (plus/minus).">Extra + Preserve Sign</string>
</property>
</item>
<item>
<property name="text">
<string>Full</string>
</property>
</item>
</widget>
</item>
<item row="1" column="0">
<widget class="QLabel" name="eeDivRoundingLabel">
<property name="text">
<string extracomment="Rounding refers here to the mathematical term.">Division Rounding Mode:</string>
</property>
</widget>
</item>
<item row="3" column="0" colspan="2">
<widget class="QGroupBox" name="eeSoftFloat">
<property name="title">
<string>Software Float</string>
</property>
<layout class="QGridLayout" name="gridLayout_4">
<item row="0" column="1">
<widget class="QCheckBox" name="eeSoftMulDiv">
<property name="text">
<string>Multiplication/Division</string>
</property>
</widget>
</item>
<item row="0" column="0">
<widget class="QCheckBox" name="eeSoftAddSub">
<property name="text">
<string>Addition/Subtraction</string>
</property>
</widget>
</item>
<item row="1" column="0">
<widget class="QCheckBox" name="eeSoftSqrt">
<property name="text">
<string>Square Root</string>
</property>
</widget>
</item>
</layout>
</widget>
</item>
</layout>
</widget>
Expand All @@ -218,7 +248,7 @@
<string extracomment="Vector Unit/VU: refers to two of PS2's processors. Do not translate the full text or do so as a comment. Leave the acronym as-is.">Vector Units (VU)</string>
</property>
<layout class="QGridLayout" name="gridLayout_3">
<item row="2" column="0">
<item row="3" column="0">
<widget class="QLabel" name="vu1RoundingLabel">
<property name="text">
<string>VU1 Rounding Mode:</string>
Expand Down Expand Up @@ -249,7 +279,129 @@
</item>
</widget>
</item>
<item row="4" column="0" colspan="2">
<item row="4" column="0">
<widget class="QLabel" name="vu1ClampLabel">
<property name="text">
<string>VU1 Clamping Mode:</string>
</property>
</widget>
</item>
<item row="0" column="0">
<widget class="QLabel" name="vu0RoundingLabel">
<property name="text">
<string>VU0 Rounding Mode:</string>
</property>
</widget>
</item>
<item row="5" column="0" colspan="2">
<widget class="QGroupBox" name="vu1SoftFloat">
<property name="title">
<string>VU1 Software Float</string>
</property>
<layout class="QGridLayout" name="gridLayout_8">
<item row="0" column="1">
<widget class="QCheckBox" name="vu1SoftMulDiv">
<property name="text">
<string>Multiplication/Division</string>
</property>
</widget>
</item>
<item row="0" column="0">
<widget class="QCheckBox" name="vu1SoftAddSub">
<property name="text">
<string>Addition/Subtraction</string>
</property>
</widget>
</item>
<item row="1" column="0">
<widget class="QCheckBox" name="vu1SoftSqrt">
<property name="text">
<string>Float Square Root</string>
</property>
</widget>
</item>
</layout>
</widget>
</item>
<item row="2" column="0" colspan="2">
<widget class="QGroupBox" name="vu0SoftFloat">
<property name="title">
<string>VU0 Software Float</string>
</property>
<layout class="QGridLayout" name="gridLayout_6">
<item row="0" column="1">
<widget class="QCheckBox" name="vu0SoftMulDiv">
<property name="text">
<string>Multiplication/Division</string>
</property>
</widget>
</item>
<item row="0" column="0">
<widget class="QCheckBox" name="vu0SoftAddSub">
<property name="text">
<string>Addition/Subtraction</string>
</property>
</widget>
</item>
<item row="1" column="0">
<widget class="QCheckBox" name="vu0SoftSqrt">
<property name="text">
<string>Square Root</string>
</property>
</widget>
</item>
</layout>
</widget>
</item>
<item row="3" column="1">
<widget class="QComboBox" name="vu1RoundingMode">
<item>
<property name="text">
<string>Nearest</string>
</property>
</item>
<item>
<property name="text">
<string>Negative</string>
</property>
</item>
<item>
<property name="text">
<string>Positive</string>
</property>
</item>
<item>
<property name="text">
<string>Chop/Zero (Default)</string>
</property>
</item>
</widget>
</item>
<item row="1" column="1">
<widget class="QComboBox" name="vu0ClampMode">
<item>
<property name="text">
<string>None</string>
</property>
</item>
<item>
<property name="text">
<string>Normal (Default)</string>
</property>
</item>
<item>
<property name="text">
<string>Extra</string>
</property>
</item>
<item>
<property name="text">
<string>Extra + Preserve Sign</string>
</property>
</item>
</widget>
</item>
<item row="6" column="0" colspan="2">
<layout class="QGridLayout" name="vuSettingsLayout">
<item row="1" column="0">
<widget class="QCheckBox" name="vuFlagHack">
Expand Down Expand Up @@ -281,76 +433,14 @@
</item>
</layout>
</item>
<item row="1" column="1">
<widget class="QComboBox" name="vu0ClampMode">
<item>
<property name="text">
<string>None</string>
</property>
</item>
<item>
<property name="text">
<string>Normal (Default)</string>
</property>
</item>
<item>
<property name="text">
<string>Extra</string>
</property>
</item>
<item>
<property name="text">
<string>Extra + Preserve Sign</string>
</property>
</item>
</widget>
</item>
<item row="1" column="0">
<widget class="QLabel" name="vu0ClampLabel">
<property name="text">
<string>VU0 Clamping Mode:</string>
</property>
</widget>
</item>
<item row="0" column="0">
<widget class="QLabel" name="vu0RoundingLabel">
<property name="text">
<string>VU0 Rounding Mode:</string>
</property>
</widget>
</item>
<item row="3" column="0">
<widget class="QLabel" name="vu1ClampLabel">
<property name="text">
<string>VU1 Clamping Mode:</string>
</property>
</widget>
</item>
<item row="2" column="1">
<widget class="QComboBox" name="vu1RoundingMode">
<item>
<property name="text">
<string>Nearest</string>
</property>
</item>
<item>
<property name="text">
<string>Negative</string>
</property>
</item>
<item>
<property name="text">
<string>Positive</string>
</property>
</item>
<item>
<property name="text">
<string>Chop/Zero (Default)</string>
</property>
</item>
</widget>
</item>
<item row="3" column="1">
<item row="4" column="1">
<widget class="QComboBox" name="vu1ClampMode">
<item>
<property name="text">
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2 changes: 2 additions & 0 deletions pcsx2/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -93,6 +93,7 @@ set(pcsx2Sources
MTGS.cpp
MTVU.cpp
Patch.cpp
Ps2Float.cpp
Pcsx2Config.cpp
PerformanceMetrics.cpp
PrecompiledHeader.cpp
Expand Down Expand Up @@ -173,6 +174,7 @@ set(pcsx2Headers
MTVU.h
Memory.h
MemoryTypes.h
Ps2Float.h
Patch.h
PerformanceMetrics.h
PrecompiledHeader.h
Expand Down
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