4 files changed, 140 insertions, 148 deletions

diff --git a/src/common/register_set.h b/src/common/register_set.h
index 0418551b3..ba19a2614 100644
--- a/src/common/register_set.h
+++ b/src/common/register_set.h
@@ -34,7 +34,7 @@
 /*
  * Standardized way to define a group of registers and corresponding data structures. To define
  * a new register set, first define struct containing an enumeration called "Id" containing
- * all register IDs and a template union called "Struct". Specialize the Struct union for any
+ * all register IDs and a template struct called "Struct". Specialize the Struct struct for any
  * register ID which needs to be accessed in a specialized way. You can then declare the object
  * containing all register values using the RegisterSet<BaseType, DefiningStruct> type, where
  * BaseType is the underlying type of each register (e.g. u32).
@@ -54,7 +54,7 @@
  *
  *         // declare register definition structures
  *         template<Id id>
- *         union Struct;
+ *         struct Struct;
  *     };
  *
  *     // Define register set object
@@ -62,9 +62,11 @@
  *
  *     // define register definition structures
  *     template<>
- *     union Regs::Struct<Regs::Value1> {
- *         BitField<0, 4, u32> some_field;
- *         BitField<4, 3, u32> some_other_field;
+ *     struct Regs::Struct<Regs::Value1> {
+ *         union {
+ *             BitField<0, 4, u32> some_field;
+ *             BitField<4, 3, u32> some_other_field;
+ *         };
  *     };
  *
  * Usage in external code (within SomeNamespace scope):
@@ -77,7 +79,7 @@
  *
  *
  * @tparam BaseType Base type used for storing individual registers, e.g. u32
- * @tparam RegDefinition Class defining an enumeration called "Id" and a template<Id id> union, as described above.
+ * @tparam RegDefinition Class defining an enumeration called "Id" and a template<Id id> struct, as described above.
  * @note RegDefinition::Id needs to have an enum value called NumIds defining the number of registers to be allocated.
  */
 template<typename BaseType, typename RegDefinition>
diff --git a/src/core/hw/gpu.cpp b/src/core/hw/gpu.cpp
index 372e4f4cc..edffa25c5 100644
--- a/src/core/hw/gpu.cpp
+++ b/src/core/hw/gpu.cpp
@@ -30,14 +30,14 @@ void SetFramebufferLocation(const FramebufferLocation mode) {
         auto& framebuffer_top = g_regs.Get<Regs::FramebufferTop>();
         auto& framebuffer_sub = g_regs.Get<Regs::FramebufferBottom>();
 
-        framebuffer_top.data.address_left1  = PADDR_TOP_LEFT_FRAME1;
-        framebuffer_top.data.address_left2  = PADDR_TOP_LEFT_FRAME2;
-        framebuffer_top.data.address_right1 = PADDR_TOP_RIGHT_FRAME1;
-        framebuffer_top.data.address_right2 = PADDR_TOP_RIGHT_FRAME2;
-        framebuffer_sub.data.address_left1  = PADDR_SUB_FRAME1;
-        //framebuffer_sub.data.address_left2  = unknown;
-        framebuffer_sub.data.address_right1 = PADDR_SUB_FRAME2;
-        //framebuffer_sub.data.address_right2 = unknown;
+        framebuffer_top.address_left1  = PADDR_TOP_LEFT_FRAME1;
+        framebuffer_top.address_left2  = PADDR_TOP_LEFT_FRAME2;
+        framebuffer_top.address_right1 = PADDR_TOP_RIGHT_FRAME1;
+        framebuffer_top.address_right2 = PADDR_TOP_RIGHT_FRAME2;
+        framebuffer_sub.address_left1  = PADDR_SUB_FRAME1;
+        //framebuffer_sub.address_left2  = unknown;
+        framebuffer_sub.address_right1 = PADDR_SUB_FRAME2;
+        //framebuffer_sub.address_right2 = unknown;
         break;
     }
 
@@ -46,14 +46,14 @@ void SetFramebufferLocation(const FramebufferLocation mode) {
         auto& framebuffer_top = g_regs.Get<Regs::FramebufferTop>();
         auto& framebuffer_sub = g_regs.Get<Regs::FramebufferBottom>();
 
-        framebuffer_top.data.address_left1  = PADDR_VRAM_TOP_LEFT_FRAME1;
-        framebuffer_top.data.address_left2  = PADDR_VRAM_TOP_LEFT_FRAME2;
-        framebuffer_top.data.address_right1 = PADDR_VRAM_TOP_RIGHT_FRAME1;
-        framebuffer_top.data.address_right2 = PADDR_VRAM_TOP_RIGHT_FRAME2;
-        framebuffer_sub.data.address_left1  = PADDR_VRAM_SUB_FRAME1;
-        //framebuffer_sub.data.address_left2  = unknown;
-        framebuffer_sub.data.address_right1 = PADDR_VRAM_SUB_FRAME2;
-        //framebuffer_sub.data.address_right2 = unknown;
+        framebuffer_top.address_left1  = PADDR_VRAM_TOP_LEFT_FRAME1;
+        framebuffer_top.address_left2  = PADDR_VRAM_TOP_LEFT_FRAME2;
+        framebuffer_top.address_right1 = PADDR_VRAM_TOP_RIGHT_FRAME1;
+        framebuffer_top.address_right2 = PADDR_VRAM_TOP_RIGHT_FRAME2;
+        framebuffer_sub.address_left1  = PADDR_VRAM_SUB_FRAME1;
+        //framebuffer_sub.address_left2  = unknown;
+        framebuffer_sub.address_right1 = PADDR_VRAM_SUB_FRAME2;
+        //framebuffer_sub.address_right2 = unknown;
         break;
     }
     }
@@ -135,14 +135,14 @@ inline void Write(u32 addr, const T data) {
         const auto& config = g_regs.Get<Regs::MemoryFill>(static_cast<Regs::Id>(index - 3));
 
         // TODO: Not sure if this check should be done at GSP level instead
-        if (config.data.address_start) {
+        if (config.address_start) {
             // TODO: Not sure if this algorithm is correct, particularly because it doesn't use the size member at all
-            u32* start = (u32*)Memory::GetPointer(config.data.GetStartAddress());
-            u32* end = (u32*)Memory::GetPointer(config.data.GetEndAddress());
+            u32* start = (u32*)Memory::GetPointer(config.GetStartAddress());
+            u32* end = (u32*)Memory::GetPointer(config.GetEndAddress());
             for (u32* ptr = start; ptr < end; ++ptr)
-                *ptr = bswap32(config.data.value); // TODO: This is just a workaround to missing framebuffer format emulation
+                *ptr = bswap32(config.value); // TODO: This is just a workaround to missing framebuffer format emulation
 
-            DEBUG_LOG(GPU, "MemoryFill from %x to %x", config.data.GetStartAddress(), config.data.GetEndAddress());
+            DEBUG_LOG(GPU, "MemoryFill from %x to %x", config.GetStartAddress(), config.GetEndAddress());
         }
         break;
     }
@@ -150,20 +150,20 @@ inline void Write(u32 addr, const T data) {
     case Regs::DisplayTransfer + 6:
     {
         const auto& config = g_regs.Get<Regs::DisplayTransfer>();
-        if (config.data.trigger & 1) {
-            u8* source_pointer = Memory::GetPointer(config.data.GetPhysicalInputAddress());
-            u8* dest_pointer = Memory::GetPointer(config.data.GetPhysicalOutputAddress());
+        if (config.trigger & 1) {
+            u8* source_pointer = Memory::GetPointer(config.GetPhysicalInputAddress());
+            u8* dest_pointer = Memory::GetPointer(config.GetPhysicalOutputAddress());
 
-            for (int y = 0; y < config.data.output_height; ++y) {
+            for (int y = 0; y < config.output_height; ++y) {
                 // TODO: Why does the register seem to hold twice the framebuffer width?
-                for (int x = 0; x < config.data.output_width / 2; ++x) {
+                for (int x = 0; x < config.output_width / 2; ++x) {
                     int source[4] = { 0, 0, 0, 0}; // rgba;
 
-                    switch (config.data.input_format) {
+                    switch (config.input_format) {
                     case Regs::FramebufferFormat::RGBA8:
                     {
                         // TODO: Most likely got the component order messed up.
-                        u8* srcptr = source_pointer + x * 4 + y * config.data.input_width * 4 / 2;
+                        u8* srcptr = source_pointer + x * 4 + y * config.input_width * 4 / 2;
                         source[0] = srcptr[0]; // blue
                         source[1] = srcptr[1]; // green
                         source[2] = srcptr[2]; // red
@@ -172,15 +172,15 @@ inline void Write(u32 addr, const T data) {
                     }
 
                     default:
-                        ERROR_LOG(GPU, "Unknown source framebuffer format %x", config.data.input_format.Value());
+                        ERROR_LOG(GPU, "Unknown source framebuffer format %x", config.input_format.Value());
                         break;
                     }
 
-                    switch (config.data.output_format) {
+                    switch (config.output_format) {
                     /*case Regs::FramebufferFormat::RGBA8:
                     {
                         // TODO: Untested
-                        u8* dstptr = (u32*)(dest_pointer + x * 4 + y * config.data.output_width * 4);
+                        u8* dstptr = (u32*)(dest_pointer + x * 4 + y * config.output_width * 4);
                         dstptr[0] = source[0];
                         dstptr[1] = source[1];
                         dstptr[2] = source[2];
@@ -190,7 +190,7 @@ inline void Write(u32 addr, const T data) {
 
                     case Regs::FramebufferFormat::RGB8:
                     {
-                        u8* dstptr = dest_pointer + x * 3 + y * config.data.output_width * 3 / 2;
+                        u8* dstptr = dest_pointer + x * 3 + y * config.output_width * 3 / 2;
                         dstptr[0] = source[0]; // blue
                         dstptr[1] = source[1]; // green
                         dstptr[2] = source[2]; // red
@@ -198,17 +198,17 @@ inline void Write(u32 addr, const T data) {
                     }
 
                     default:
-                        ERROR_LOG(GPU, "Unknown destination framebuffer format %x", config.data.output_format.Value());
+                        ERROR_LOG(GPU, "Unknown destination framebuffer format %x", config.output_format.Value());
                         break;
                     }
                 }
             }
 
             DEBUG_LOG(GPU, "DisplayTriggerTransfer: %x bytes from %x(%xx%x)-> %x(%xx%x), dst format %x",
-                      config.data.output_height * config.data.output_width * 4,
-                      config.data.GetPhysicalInputAddress(), (int)config.data.input_width, (int)config.data.input_height,
-                      config.data.GetPhysicalOutputAddress(), (int)config.data.output_width, (int)config.data.output_height,
-                      config.data.output_format.Value());
+                      config.output_height * config.output_width * 4,
+                      config.GetPhysicalInputAddress(), (int)config.input_width, (int)config.input_height,
+                      config.GetPhysicalOutputAddress(), (int)config.output_width, (int)config.output_height,
+                      config.output_format.Value());
         }
         break;
     }
@@ -216,10 +216,10 @@ inline void Write(u32 addr, const T data) {
     case Regs::CommandProcessor + 4:
     {
         const auto& config = g_regs.Get<Regs::CommandProcessor>();
-        if (config.data.trigger & 1)
+        if (config.trigger & 1)
         {
-            // u32* buffer = (u32*)Memory::GetPointer(config.data.address << 3);
-            ERROR_LOG(GPU, "Beginning %x bytes of commands from address %x", config.data.size, config.data.address << 3);
+            // u32* buffer = (u32*)Memory::GetPointer(config.address << 3);
+            ERROR_LOG(GPU, "Beginning %x bytes of commands from address %x", config.size, config.address << 3);
             // TODO: Process command list!
         }
         break;
@@ -263,17 +263,17 @@ void Init() {
     auto& framebuffer_top = g_regs.Get<Regs::FramebufferTop>();
     auto& framebuffer_sub = g_regs.Get<Regs::FramebufferBottom>();
     // TODO: Width should be 240 instead?
-    framebuffer_top.data.width = 480;
-    framebuffer_top.data.height = 400;
-    framebuffer_top.data.stride = 480*3;
-    framebuffer_top.data.color_format = Regs::FramebufferFormat::RGB8;
-    framebuffer_top.data.active_fb = 0;
-
-    framebuffer_sub.data.width = 480;
-    framebuffer_sub.data.height = 400;
-    framebuffer_sub.data.stride = 480*3;
-    framebuffer_sub.data.color_format = Regs::FramebufferFormat::RGB8;
-    framebuffer_sub.data.active_fb = 0;
+    framebuffer_top.width = 480;
+    framebuffer_top.height = 400;
+    framebuffer_top.stride = 480*3;
+    framebuffer_top.color_format = Regs::FramebufferFormat::RGB8;
+    framebuffer_top.active_fb = 0;
+
+    framebuffer_sub.width = 480;
+    framebuffer_sub.height = 400;
+    framebuffer_sub.stride = 480*3;
+    framebuffer_sub.color_format = Regs::FramebufferFormat::RGB8;
+    framebuffer_sub.active_fb = 0;
 
     NOTICE_LOG(GPU, "initialized OK");
 }
diff --git a/src/core/hw/gpu.h b/src/core/hw/gpu.h
index ce524bd02..4ef0a047f 100644
--- a/src/core/hw/gpu.h
+++ b/src/core/hw/gpu.h
@@ -29,7 +29,7 @@ struct Regs {
     };
 
     template<Id id>
-    union Struct;
+    struct Struct;
 
     enum class FramebufferFormat : u32 {
         RGBA8  = 0,
@@ -38,128 +38,118 @@ struct Regs {
         RGB5A1 = 3,
         RGBA4  = 4,
     };
-
 };
 
 template<>
-union Regs::Struct<Regs::MemoryFill> {
-    struct {
-        u32 address_start;
-        u32 address_end; // ?
-        u32 size;
-        u32 value; // ?
-
-        inline u32 GetStartAddress() const {
-            return address_start * 8;
-        }
-
-        inline u32 GetEndAddress() const {
-            return address_end * 8;
-        }
-    } data;
+struct Regs::Struct<Regs::MemoryFill> {
+    u32 address_start;
+    u32 address_end; // ?
+    u32 size;
+    u32 value; // ?
+
+    inline u32 GetStartAddress() const {
+        return address_start * 8;
+    }
+
+    inline u32 GetEndAddress() const {
+        return address_end * 8;
+    }
 };
 static_assert(sizeof(Regs::Struct<Regs::MemoryFill>) == 0x10, "Structure size and register block length don't match");
 
 template<>
-union Regs::Struct<Regs::FramebufferTop> {
+struct Regs::Struct<Regs::FramebufferTop> {
     using Format = Regs::FramebufferFormat;
 
-    struct {
-        union {
-            u32 size;
+    union {
+        u32 size;
 
-            BitField< 0, 16, u32> width;
-            BitField<16, 16, u32> height;
-        };
+        BitField< 0, 16, u32> width;
+        BitField<16, 16, u32> height;
+    };
 
-        u32 pad0[2];
+    u32 pad0[2];
 
-        u32 address_left1;
-        u32 address_left2;
+    u32 address_left1;
+    u32 address_left2;
 
-        union {
-            u32 format;
+    union {
+        u32 format;
 
-            BitField< 0, 3, Format> color_format;
-        };
+        BitField< 0, 3, Format> color_format;
+    };
 
-        u32 pad1;
+    u32 pad1;
 
-        union {
-            u32 active_fb;
+    union {
+        u32 active_fb;
 
-            BitField<0, 1, u32> second_fb_active;
-        };
+        BitField<0, 1, u32> second_fb_active;
+    };
 
-        u32 pad2[5];
+    u32 pad2[5];
 
-        u32 stride;
+    u32 stride;
 
-        u32 address_right1;
-        u32 address_right2;
-    } data;
+    u32 address_right1;
+    u32 address_right2;
 };
+
 template<>
-union Regs::Struct<Regs::FramebufferBottom> {
-    using Type = decltype(Regs::Struct<Regs::FramebufferTop>::data);
-    Type data;
+struct Regs::Struct<Regs::FramebufferBottom> : public Regs::Struct<Regs::FramebufferTop> {
 };
 static_assert(sizeof(Regs::Struct<Regs::FramebufferTop>) == 0x40, "Structure size and register block length don't match");
 
 template<>
-union Regs::Struct<Regs::DisplayTransfer> {
+struct Regs::Struct<Regs::DisplayTransfer> {
     using Format = Regs::FramebufferFormat;
 
-    struct {
-        u32 input_address;
-        u32 output_address;
+    u32 input_address;
+    u32 output_address;
 
-        inline u32 GetPhysicalInputAddress() const {
-            return input_address * 8;
-        }
+    inline u32 GetPhysicalInputAddress() const {
+        return input_address * 8;
+    }
 
-        inline u32 GetPhysicalOutputAddress() const {
-            return output_address * 8;
-        }
+    inline u32 GetPhysicalOutputAddress() const {
+        return output_address * 8;
+    }
 
-        union {
-            u32 output_size;
+    union {
+        u32 output_size;
 
-            BitField< 0, 16, u32> output_width;
-            BitField<16, 16, u32> output_height;
-        };
+        BitField< 0, 16, u32> output_width;
+        BitField<16, 16, u32> output_height;
+    };
 
-        union {
-            u32 input_size;
+    union {
+        u32 input_size;
 
-            BitField< 0, 16, u32> input_width;
-            BitField<16, 16, u32> input_height;
-        };
+        BitField< 0, 16, u32> input_width;
+        BitField<16, 16, u32> input_height;
+    };
 
-        union {
-            u32 flags;
+    union {
+        u32 flags;
 
-            BitField< 0, 1, u32> flip_data;
-            BitField< 8, 3, Format> input_format;
-            BitField<12, 3, Format> output_format;
-            BitField<16, 1, u32> output_tiled;
-        };
+        BitField< 0, 1, u32> flip_data;
+        BitField< 8, 3, Format> input_format;
+        BitField<12, 3, Format> output_format;
+        BitField<16, 1, u32> output_tiled;
+    };
 
-        u32 unknown;
-        u32 trigger;
-    } data;
+    u32 unknown;
+    u32 trigger;
 };
 static_assert(sizeof(Regs::Struct<Regs::DisplayTransfer>) == 0x1C, "Structure size and register block length don't match");
 
 template<>
-union Regs::Struct<Regs::CommandProcessor> {
-    struct {
-        u32 size;
-        u32 pad0;
-        u32 address;
-        u32 pad1;
-        u32 trigger;
-    } data;
+struct Regs::Struct<Regs::CommandProcessor> {
+    u32 size;
+    u32 pad0;
+    u32 address;
+    u32 pad1;
+    u32 trigger;
 };
 static_assert(sizeof(Regs::Struct<Regs::CommandProcessor>) == 0x14, "Structure size and register block length don't match");
 
diff --git a/src/video_core/renderer_opengl/renderer_opengl.cpp b/src/video_core/renderer_opengl/renderer_opengl.cpp
index 8d9d61ae8..50f820e4a 100644
--- a/src/video_core/renderer_opengl/renderer_opengl.cpp
+++ b/src/video_core/renderer_opengl/renderer_opengl.cpp
@@ -80,17 +80,17 @@ void RendererOpenGL::RenderXFB(const common::Rect& src_rect, const common::Rect&
 
     const auto& framebuffer_top = GPU::g_regs.Get<GPU::Regs::FramebufferTop>();
     const auto& framebuffer_sub = GPU::g_regs.Get<GPU::Regs::FramebufferBottom>();
-    const u32 active_fb_top = (framebuffer_top.data.active_fb == 1)
-                                ? framebuffer_top.data.address_left2
-                                : framebuffer_top.data.address_left1;
-    const u32 active_fb_sub = (framebuffer_sub.data.active_fb == 1)
-                                ? framebuffer_sub.data.address_left2
-                                : framebuffer_sub.data.address_left1;
+    const u32 active_fb_top = (framebuffer_top.active_fb == 1)
+                                ? framebuffer_top.address_left2
+                                : framebuffer_top.address_left1;
+    const u32 active_fb_sub = (framebuffer_sub.active_fb == 1)
+                                ? framebuffer_sub.address_left2
+                                : framebuffer_sub.address_left1;
 
     DEBUG_LOG(GPU, "RenderXFB: %x bytes from %x(%xx%x), fmt %x",
-              framebuffer_top.data.stride * framebuffer_top.data.height,
-              GPU::GetFramebufferAddr(active_fb_top), (int)framebuffer_top.data.width,
-              (int)framebuffer_top.data.height, (int)framebuffer_top.data.format);
+              framebuffer_top.stride * framebuffer_top.height,
+              GPU::GetFramebufferAddr(active_fb_top), (int)framebuffer_top.width,
+              (int)framebuffer_top.height, (int)framebuffer_top.format);
 
     // TODO: This should consider the GPU registers for framebuffer width, height and stride.
     FlipFramebuffer(GPU::GetFramebufferPointer(active_fb_top), m_xfb_top_flipped);