fp: Add FPSR

src/CMakeLists.txt

@@ -17,6 +17,7 @@ add_library(dynarmic
     common/crc32.cpp
     common/crc32.h
     common/fp_util.h
+    common/fp/fpsr.h
     common/fp/info.h
     common/fp/rounding_mode.h
     common/intrusive_list.h

src/common/fp/fpsr.h

@@ -0,0 +1,162 @@
+/* This file is part of the dynarmic project.
+ * Copyright (c) 2018 MerryMage
+ * This software may be used and distributed according to the terms of the GNU
+ * General Public License version 2 or any later version.
+ */
+
+#pragma once
+
+#include <boost/optional.hpp>
+
+#include "common/bit_util.h"
+#include "common/common_types.h"
+
+namespace Dynarmic::FP {
+
+/**
+ * Representation of the Floating-Point Status Register.
+ */
+class FPSR final {
+public:
+    FPSR() = default;
+    FPSR(const FPSR&) = default;
+    FPSR(FPSR&&) = default;
+    explicit FPSR(u32 data) : value{data & mask} {}
+
+    FPSR& operator=(const FPSR&) = default;
+    FPSR& operator=(FPSR&&) = default;
+    FPSR& operator=(u32 data) {
+        value = data & mask;
+        return *this;
+    }
+
+    /// Get negative condition flag
+    bool N() const {
+        return Common::Bit<31>(value);
+    }
+
+    /// Set negative condition flag
+    void N(bool N_) {
+        value = Common::ModifyBit<31>(value, N_);
+    }
+
+    /// Get zero condition flag
+    bool Z() const {
+        return Common::Bit<30>(value);
+    }
+
+    /// Set zero condition flag
+    void Z(bool Z_) {
+        value = Common::ModifyBit<30>(value, Z_);
+    }
+
+    /// Get carry condition flag
+    bool C() const {
+        return Common::Bit<29>(value);
+    }
+
+    /// Set carry condition flag
+    void C(bool C_) {
+        value = Common::ModifyBit<29>(value, C_);
+    }
+
+    /// Get overflow condition flag
+    bool V() const {
+        return Common::Bit<28>(value);
+    }
+
+    /// Set overflow condition flag
+    void V(bool V_) {
+        value = Common::ModifyBit<28>(value, V_);
+    }
+
+    /// Get cumulative saturation bit
+    bool QC() const {
+        return Common::Bit<27>(value);
+    }
+
+    /// Set cumulative saturation bit
+    void QC(bool QC_) {
+        value = Common::ModifyBit<27>(value, QC_);
+    }
+
+    /// Get input denormal floating-point exception bit
+    bool IDC() const {
+        return Common::Bit<7>(value);
+    }
+
+    /// Set input denormal floating-point exception bit
+    void IDC(bool IDC_) {
+        value = Common::ModifyBit<7>(value, IDC_);
+    }
+
+    /// Get inexact cumulative floating-point exception bit
+    bool IXC() const {
+        return Common::Bit<4>(value);
+    }
+
+    /// Set inexact cumulative floating-point exception bit
+    void IXC(bool IXC_) {
+        value = Common::ModifyBit<4>(value, IXC_);
+    }
+
+    /// Get underflow cumulative floating-point exception bit
+    bool UFC() const {
+        return Common::Bit<3>(value);
+    }
+
+    /// Set underflow cumulative floating-point exception bit
+    void UFC(bool UFC_) {
+        value = Common::ModifyBit<3>(value, UFC_);
+    }
+
+    /// Get overflow cumulative floating-point exception bit
+    bool OFC() const {
+        return Common::Bit<2>(value);
+    }
+
+    /// Set overflow cumulative floating-point exception bit
+    void OFC(bool OFC_) {
+        value = Common::ModifyBit<2>(value, OFC_);
+    }
+
+    /// Get divide by zero cumulative floating-point exception bit
+    bool DZC() const {
+        return Common::Bit<1>(value);
+    }
+
+    /// Set divide by zero cumulative floating-point exception bit
+    void DZC(bool DZC_) {
+        value = Common::ModifyBit<1>(value, DZC_);
+    }
+
+    /// Get invalid operation cumulative floating-point exception bit
+    bool IOC() const {
+        return Common::Bit<0>(value);
+    }
+
+    /// Set invalid operation cumulative floating-point exception bit
+    void IOC(bool IOC_) {
+        value = Common::ModifyBit<0>(value, IOC_);
+    }
+
+    /// Gets the underlying raw value within the FPSR.
+    u32 Value() const {
+        return value;
+    }
+
+private:
+    // Bits 5-6 and 8-26 are reserved.
+    static constexpr u32 mask = 0xF800009F;
+    u32 value = 0;
+};
+
+inline bool operator==(FPSR lhs, FPSR rhs) {
+    return lhs.Value() == rhs.Value();
+}
+
+inline bool operator!=(FPSR lhs, FPSR rhs) {
+    return !operator==(lhs, rhs);
+}
+
+} // namespace Dynarmic::FP