ShaderGen: Implemented the fmul32i shader instruction.

It will now save the coords before writing the outputs in a subscope.

src/video_core/engines/maxwell_3d.h

@@ -319,7 +319,15 @@ public:
                     }
                 } rt[NumRenderTargets];
 
-                INSERT_PADDING_WORDS(0x80);
+                struct {
+                    f32 scale_x;
+                    f32 scale_y;
+                    f32 scale_z;
+                    u32 translate_x;
+                    u32 translate_y;
+                    u32 translate_z;
+                    INSERT_PADDING_WORDS(2);
+                } viewport_transform[NumViewports];
 
                 struct {
                     union {
@@ -649,6 +657,7 @@ private:
                   "Field " #field_name " has invalid position")
 
 ASSERT_REG_POSITION(rt, 0x200);
+ASSERT_REG_POSITION(viewport_transform[0], 0x280);
 ASSERT_REG_POSITION(viewport, 0x300);
 ASSERT_REG_POSITION(vertex_buffer, 0x35D);
 ASSERT_REG_POSITION(zeta, 0x3F8);

src/video_core/engines/shader_bytecode.h

@@ -90,6 +90,7 @@ union OpCode {
     enum class Id : u64 {
         TEXS = 0x6C,
         IPA = 0xE0,
+        FMUL32_IMM = 0x1E,
         FFMA_IMM = 0x65,
         FFMA_CR = 0x93,
         FFMA_RC = 0xA3,
@@ -142,6 +143,7 @@ union OpCode {
 
         switch (op2) {
         case Id::IPA:
+        case Id::FMUL32_IMM:
             return op2;
         }
 
@@ -235,6 +237,7 @@ union OpCode {
         info_table[Id::FMUL_R] = {Type::Arithmetic, "fmul_r"};
         info_table[Id::FMUL_C] = {Type::Arithmetic, "fmul_c"};
         info_table[Id::FMUL_IMM] = {Type::Arithmetic, "fmul_imm"};
+        info_table[Id::FMUL32_IMM] = {Type::Arithmetic, "fmul32_imm"};
         info_table[Id::FSETP_C] = {Type::Arithmetic, "fsetp_c"};
         info_table[Id::FSETP_R] = {Type::Arithmetic, "fsetp_r"};
         info_table[Id::EXIT] = {Type::Trivial, "exit"};
@@ -309,7 +312,8 @@ union Instruction {
     BitField<39, 8, Register> gpr39;
 
     union {
-        BitField<20, 19, u64> imm20;
+        BitField<20, 19, u64> imm20_19;
+        BitField<20, 32, u64> imm20_32;
         BitField<45, 1, u64> negate_b;
         BitField<46, 1, u64> abs_a;
         BitField<48, 1, u64> negate_a;
@@ -317,14 +321,21 @@ union Instruction {
         BitField<50, 1, u64> abs_d;
         BitField<56, 1, u64> negate_imm;
 
-        float GetImm20() const {
+        float GetImm20_19() const {
             float result{};
-            u32 imm{static_cast<u32>(imm20)};
+            u32 imm{static_cast<u32>(imm20_19)};
             imm <<= 12;
             imm |= negate_imm ? 0x80000000 : 0;
             std::memcpy(&result, &imm, sizeof(imm));
             return result;
         }
+
+        float GetImm20_32() const {
+            float result{};
+            u32 imm{static_cast<u32>(imm20_32)};
+            std::memcpy(&result, &imm, sizeof(imm));
+            return result;
+        }
     } alu;
 
     union {

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -527,6 +527,8 @@ bool RasterizerOpenGL::AccelerateDisplay(const Tegra::FramebufferConfig& framebu
     src_params.block_height = Tegra::Texture::TICEntry::DefaultBlockHeight;
     src_params.pixel_format =
         SurfaceParams::PixelFormatFromGPUPixelFormat(framebuffer.pixel_format);
+    src_params.component_type =
+        SurfaceParams::ComponentTypeFromGPUPixelFormat(framebuffer.pixel_format);
     src_params.UpdateParams();
 
     MathUtil::Rectangle<u32> src_rect;

src/video_core/renderer_opengl/gl_rasterizer_cache.cpp

@@ -36,6 +36,7 @@
 
 using SurfaceType = SurfaceParams::SurfaceType;
 using PixelFormat = SurfaceParams::PixelFormat;
+using ComponentType = SurfaceParams::ComponentType;
 
 struct FormatTuple {
     GLint internal_format;
@@ -47,26 +48,24 @@ struct FormatTuple {
     u32 compression_factor;
 };
 
-static constexpr std::array<FormatTuple, 1> fb_format_tuples = {{
-    {GL_RGBA8, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, false, 1}, // RGBA8
+static constexpr std::array<FormatTuple, SurfaceParams::MaxPixelFormat> tex_format_tuples = {{
+    {GL_RGBA8, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV, false, 1},                     // ABGR8
+    {GL_RGB, GL_RGB, GL_UNSIGNED_SHORT_5_6_5_REV, false, 1},                        // B5G6R5
+    {GL_COMPRESSED_RGB_S3TC_DXT1_EXT, GL_RGB, GL_UNSIGNED_INT_8_8_8_8, true, 16},   // DXT1
+    {GL_COMPRESSED_RGBA_S3TC_DXT3_EXT, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, true, 16}, // DXT23
+    {GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, true, 16}, // DXT45
 }};
 
-static constexpr std::array<FormatTuple, 2> tex_format_tuples = {{
-    {GL_RGBA8, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, false, 1},                       // RGBA8
-    {GL_COMPRESSED_RGB_S3TC_DXT1_EXT, GL_RGB, GL_UNSIGNED_INT_8_8_8_8, true, 16}, // DXT1
-}};
-
-static const FormatTuple& GetFormatTuple(PixelFormat pixel_format) {
+static const FormatTuple& GetFormatTuple(PixelFormat pixel_format, ComponentType component_type) {
     const SurfaceType type = SurfaceParams::GetFormatType(pixel_format);
-    if (type == SurfaceType::Color) {
-        ASSERT(static_cast<size_t>(pixel_format) < fb_format_tuples.size());
-        return fb_format_tuples[static_cast<unsigned int>(pixel_format)];
+    if (type == SurfaceType::ColorTexture) {
+        ASSERT(static_cast<size_t>(pixel_format) < tex_format_tuples.size());
+        // For now only UNORM components are supported
+        ASSERT(component_type == ComponentType::UNorm);
+        return tex_format_tuples[static_cast<unsigned int>(pixel_format)];
     } else if (type == SurfaceType::Depth || type == SurfaceType::DepthStencil) {
         // TODO(Subv): Implement depth formats
         ASSERT_MSG(false, "Unimplemented");
-    } else if (type == SurfaceType::Texture) {
-        ASSERT(static_cast<size_t>(pixel_format) < tex_format_tuples.size());
-        return tex_format_tuples[static_cast<unsigned int>(pixel_format)];
     }
 
     UNREACHABLE();
@@ -84,23 +83,6 @@ static u16 GetResolutionScaleFactor() {
                                 : Settings::values.resolution_factor);
 }
 
-template <bool morton_to_gl, PixelFormat format>
-static void MortonCopyTile(u32 stride, u8* tile_buffer, u8* gl_buffer) {
-    constexpr u32 bytes_per_pixel = SurfaceParams::GetFormatBpp(format) / 8;
-    constexpr u32 gl_bytes_per_pixel = CachedSurface::GetGLBytesPerPixel(format);
-    for (u32 y = 0; y < 8; ++y) {
-        for (u32 x = 0; x < 8; ++x) {
-            u8* tile_ptr = tile_buffer + VideoCore::MortonInterleave(x, y) * bytes_per_pixel;
-            u8* gl_ptr = gl_buffer + ((7 - y) * stride + x) * gl_bytes_per_pixel;
-            if (morton_to_gl) {
-                std::memcpy(gl_ptr, tile_ptr, bytes_per_pixel);
-            } else {
-                std::memcpy(tile_ptr, gl_ptr, bytes_per_pixel);
-            }
-        }
-    }
-}
-
 template <bool morton_to_gl, PixelFormat format>
 void MortonCopy(u32 stride, u32 block_height, u32 height, u8* gl_buffer, VAddr base, VAddr start,
                 VAddr end) {
@@ -121,16 +103,22 @@ void MortonCopy(u32 stride, u32 block_height, u32 height, u8* gl_buffer, VAddr b
     }
 }
 
-static constexpr std::array<void (*)(u32, u32, u32, u8*, VAddr, VAddr, VAddr), 2> morton_to_gl_fns =
-    {
-        MortonCopy<true, PixelFormat::RGBA8>,
-        MortonCopy<true, PixelFormat::DXT1>,
+static constexpr std::array<void (*)(u32, u32, u32, u8*, VAddr, VAddr, VAddr),
+                            SurfaceParams::MaxPixelFormat>
+    morton_to_gl_fns = {
+        MortonCopy<true, PixelFormat::ABGR8>, MortonCopy<true, PixelFormat::B5G6R5>,
+        MortonCopy<true, PixelFormat::DXT1>,  MortonCopy<true, PixelFormat::DXT23>,
+        MortonCopy<true, PixelFormat::DXT45>,
 };
 
-static constexpr std::array<void (*)(u32, u32, u32, u8*, VAddr, VAddr, VAddr), 2> gl_to_morton_fns =
-    {
-        MortonCopy<false, PixelFormat::RGBA8>,
-        // TODO(Subv): Swizzling the DXT1 format is not yet supported
+static constexpr std::array<void (*)(u32, u32, u32, u8*, VAddr, VAddr, VAddr),
+                            SurfaceParams::MaxPixelFormat>
+    gl_to_morton_fns = {
+        MortonCopy<false, PixelFormat::ABGR8>,
+        MortonCopy<false, PixelFormat::B5G6R5>,
+        // TODO(Subv): Swizzling the DXT1/DXT23/DXT45 formats is not yet supported
+        nullptr,
+        nullptr,
         nullptr,
 };
 
@@ -180,7 +168,7 @@ static bool BlitTextures(GLuint src_tex, const MathUtil::Rectangle<u32>& src_rec
 
     u32 buffers = 0;
 
-    if (type == SurfaceType::Color || type == SurfaceType::Texture) {
+    if (type == SurfaceType::ColorTexture) {
         glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, src_tex,
                                0);
         glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0,
@@ -309,8 +297,9 @@ MathUtil::Rectangle<u32> SurfaceParams::GetScaledSubRect(const SurfaceParams& su
 bool SurfaceParams::ExactMatch(const SurfaceParams& other_surface) const {
     return std::tie(other_surface.addr, other_surface.width, other_surface.height,
                     other_surface.stride, other_surface.block_height, other_surface.pixel_format,
-                    other_surface.is_tiled) ==
-               std::tie(addr, width, height, stride, block_height, pixel_format, is_tiled) &&
+                    other_surface.component_type,
+                    other_surface.is_tiled) == std::tie(addr, width, height, stride, block_height,
+                                                        pixel_format, component_type, is_tiled) &&
            pixel_format != PixelFormat::Invalid;
 }
 
@@ -318,6 +307,7 @@ bool SurfaceParams::CanSubRect(const SurfaceParams& sub_surface) const {
     return sub_surface.addr >= addr && sub_surface.end <= end &&
            sub_surface.pixel_format == pixel_format && pixel_format != PixelFormat::Invalid &&
            sub_surface.is_tiled == is_tiled && sub_surface.block_height == block_height &&
+           sub_surface.component_type == component_type &&
            (sub_surface.addr - addr) % BytesInPixels(is_tiled ? 64 : 1) == 0 &&
            (sub_surface.stride == stride || sub_surface.height <= (is_tiled ? 8u : 1u)) &&
            GetSubRect(sub_surface).left + sub_surface.width <= stride;
@@ -327,7 +317,7 @@ bool SurfaceParams::CanExpand(const SurfaceParams& expanded_surface) const {
     return pixel_format != PixelFormat::Invalid && pixel_format == expanded_surface.pixel_format &&
            addr <= expanded_surface.end && expanded_surface.addr <= end &&
            is_tiled == expanded_surface.is_tiled && block_height == expanded_surface.block_height &&
-           stride == expanded_surface.stride &&
+           component_type == expanded_surface.component_type && stride == expanded_surface.stride &&
            (std::max(expanded_surface.addr, addr) - std::min(expanded_surface.addr, addr)) %
                    BytesInPixels(stride * (is_tiled ? 8 : 1)) ==
                0;
@@ -338,7 +328,8 @@ bool SurfaceParams::CanTexCopy(const SurfaceParams& texcopy_params) const {
         end < texcopy_params.end) {
         return false;
     }
-    if (texcopy_params.block_height != block_height)
+    if (texcopy_params.block_height != block_height ||
+        texcopy_params.component_type != component_type)
         return false;
 
     if (texcopy_params.width != texcopy_params.stride) {
@@ -552,7 +543,7 @@ void CachedSurface::UploadGLTexture(const MathUtil::Rectangle<u32>& rect, GLuint
     GLint y0 = static_cast<GLint>(rect.bottom);
     size_t buffer_offset = (y0 * stride + x0) * GetGLBytesPerPixel(pixel_format);
 
-    const FormatTuple& tuple = GetFormatTuple(pixel_format);
+    const FormatTuple& tuple = GetFormatTuple(pixel_format, component_type);
     GLuint target_tex = texture.handle;
 
     // If not 1x scale, create 1x texture that we will blit from to replace texture subrect in
@@ -625,7 +616,7 @@ void CachedSurface::DownloadGLTexture(const MathUtil::Rectangle<u32>& rect, GLui
     OpenGLState prev_state = state;
     SCOPE_EXIT({ prev_state.Apply(); });
 
-    const FormatTuple& tuple = GetFormatTuple(pixel_format);
+    const FormatTuple& tuple = GetFormatTuple(pixel_format, component_type);
 
     // Ensure no bad interactions with GL_PACK_ALIGNMENT
     ASSERT(stride * GetGLBytesPerPixel(pixel_format) % 4 == 0);
@@ -658,7 +649,7 @@ void CachedSurface::DownloadGLTexture(const MathUtil::Rectangle<u32>& rect, GLui
         state.draw.read_framebuffer = read_fb_handle;
         state.Apply();
 
-        if (type == SurfaceType::Color || type == SurfaceType::Texture) {
+        if (type == SurfaceType::ColorTexture) {
             glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
                                    texture.handle, 0);
             glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D,
@@ -1038,6 +1029,13 @@ Surface RasterizerCacheOpenGL::GetTextureSurface(const Tegra::Texture::FullTextu
     params.is_tiled = config.tic.IsTiled();
     params.pixel_format = SurfaceParams::PixelFormatFromTextureFormat(config.tic.format);
 
+    // TODO(Subv): Different types per component are not supported.
+    ASSERT(config.tic.r_type.Value() == config.tic.g_type.Value() &&
+           config.tic.r_type.Value() == config.tic.b_type.Value() &&
+           config.tic.r_type.Value() == config.tic.a_type.Value());
+
+    params.component_type = SurfaceParams::ComponentTypeFromTexture(config.tic.r_type.Value());
+
     if (config.tic.IsTiled()) {
         params.block_height = config.tic.BlockHeight();
     } else {
@@ -1105,6 +1103,7 @@ SurfaceSurfaceRect_Tuple RasterizerCacheOpenGL::GetFramebufferSurfaces(
 
     color_params.addr = memory_manager->PhysicalToVirtualAddress(config.Address());
     color_params.pixel_format = SurfaceParams::PixelFormatFromRenderTargetFormat(config.format);
+    color_params.component_type = SurfaceParams::ComponentTypeFromRenderTarget(config.format);
     color_params.UpdateParams();
 
     ASSERT_MSG(!using_depth_fb, "depth buffer is unimplemented");
@@ -1300,7 +1299,6 @@ void RasterizerCacheOpenGL::InvalidateRegion(VAddr addr, u64 size, const Surface
     const SurfaceInterval invalid_interval(addr, addr + size);
 
     if (region_owner != nullptr) {
-        ASSERT(region_owner->type != SurfaceType::Texture);
         ASSERT(addr >= region_owner->addr && addr + size <= region_owner->end);
         // Surfaces can't have a gap
         ASSERT(region_owner->width == region_owner->stride);
@@ -1362,7 +1360,8 @@ Surface RasterizerCacheOpenGL::CreateSurface(const SurfaceParams& params) {
 
     surface->gl_buffer_size = 0;
     surface->invalid_regions.insert(surface->GetInterval());
-    AllocateSurfaceTexture(surface->texture.handle, GetFormatTuple(surface->pixel_format),
+    AllocateSurfaceTexture(surface->texture.handle,
+                           GetFormatTuple(surface->pixel_format, surface->component_type),
                            surface->GetScaledWidth(), surface->GetScaledHeight());
 
     return surface;

src/video_core/renderer_opengl/gl_rasterizer_cache.h

@@ -52,27 +52,45 @@ enum class ScaleMatch {
 
 struct SurfaceParams {
     enum class PixelFormat {
-        RGBA8 = 0,
-        DXT1 = 1,
+        ABGR8 = 0,
+        B5G6R5 = 1,
+        DXT1 = 2,
+        DXT23 = 3,
+        DXT45 = 4,
+
+        Max,
         Invalid = 255,
     };
 
+    static constexpr size_t MaxPixelFormat = static_cast<size_t>(PixelFormat::Max);
+
+    enum class ComponentType {
+        Invalid = 0,
+        SNorm = 1,
+        UNorm = 2,
+        SInt = 3,
+        UInt = 4,
+        Float = 5,
+    };
+
     enum class SurfaceType {
-        Color = 0,
-        Texture = 1,
-        Depth = 2,
-        DepthStencil = 3,
-        Fill = 4,
-        Invalid = 5
+        ColorTexture = 0,
+        Depth = 1,
+        DepthStencil = 2,
+        Fill = 3,
+        Invalid = 4,
     };
 
     static constexpr unsigned int GetFormatBpp(PixelFormat format) {
         if (format == PixelFormat::Invalid)
             return 0;
 
-        constexpr std::array<unsigned int, 2> bpp_table = {
-            32, // RGBA8
-            64, // DXT1
+        constexpr std::array<unsigned int, MaxPixelFormat> bpp_table = {
+            32,  // ABGR8
+            16,  // B5G6R5
+            64,  // DXT1
+            128, // DXT23
+            128, // DXT45
         };
 
         ASSERT(static_cast<size_t>(format) < bpp_table.size());
@@ -85,7 +103,7 @@ struct SurfaceParams {
     static PixelFormat PixelFormatFromRenderTargetFormat(Tegra::RenderTargetFormat format) {
         switch (format) {
         case Tegra::RenderTargetFormat::RGBA8_UNORM:
-            return PixelFormat::RGBA8;
+            return PixelFormat::ABGR8;
         default:
             NGLOG_CRITICAL(HW_GPU, "Unimplemented format={}", static_cast<u32>(format));
             UNREACHABLE();
@@ -95,7 +113,7 @@ struct SurfaceParams {
     static PixelFormat PixelFormatFromGPUPixelFormat(Tegra::FramebufferConfig::PixelFormat format) {
         switch (format) {
         case Tegra::FramebufferConfig::PixelFormat::ABGR8:
-            return PixelFormat::RGBA8;
+            return PixelFormat::ABGR8;
         default:
             NGLOG_CRITICAL(HW_GPU, "Unimplemented format={}", static_cast<u32>(format));
             UNREACHABLE();
@@ -106,9 +124,15 @@ struct SurfaceParams {
         // TODO(Subv): Properly implement this
         switch (format) {
         case Tegra::Texture::TextureFormat::A8R8G8B8:
-            return PixelFormat::RGBA8;
+            return PixelFormat::ABGR8;
+        case Tegra::Texture::TextureFormat::B5G6R5:
+            return PixelFormat::B5G6R5;
         case Tegra::Texture::TextureFormat::DXT1:
             return PixelFormat::DXT1;
+        case Tegra::Texture::TextureFormat::DXT23:
+            return PixelFormat::DXT23;
+        case Tegra::Texture::TextureFormat::DXT45:
+            return PixelFormat::DXT45;
         default:
             NGLOG_CRITICAL(HW_GPU, "Unimplemented format={}", static_cast<u32>(format));
             UNREACHABLE();
@@ -118,21 +142,60 @@ struct SurfaceParams {
     static Tegra::Texture::TextureFormat TextureFormatFromPixelFormat(PixelFormat format) {
         // TODO(Subv): Properly implement this
         switch (format) {
-        case PixelFormat::RGBA8:
+        case PixelFormat::ABGR8:
             return Tegra::Texture::TextureFormat::A8R8G8B8;
+        case PixelFormat::B5G6R5:
+            return Tegra::Texture::TextureFormat::B5G6R5;
         case PixelFormat::DXT1:
             return Tegra::Texture::TextureFormat::DXT1;
+        case PixelFormat::DXT23:
+            return Tegra::Texture::TextureFormat::DXT23;
+        case PixelFormat::DXT45:
+            return Tegra::Texture::TextureFormat::DXT45;
         default:
             UNREACHABLE();
         }
     }
 
+    static ComponentType ComponentTypeFromTexture(Tegra::Texture::ComponentType type) {
+        // TODO(Subv): Implement more component types
+        switch (type) {
+        case Tegra::Texture::ComponentType::UNORM:
+            return ComponentType::UNorm;
+        default:
+            NGLOG_CRITICAL(HW_GPU, "Unimplemented component type={}", static_cast<u32>(type));
+            UNREACHABLE();
+        }
+    }
+
+    static ComponentType ComponentTypeFromRenderTarget(Tegra::RenderTargetFormat format) {
+        // TODO(Subv): Implement more render targets
+        switch (format) {
+        case Tegra::RenderTargetFormat::RGBA8_UNORM:
+        case Tegra::RenderTargetFormat::RGB10_A2_UNORM:
+            return ComponentType::UNorm;
+        default:
+            NGLOG_CRITICAL(HW_GPU, "Unimplemented format={}", static_cast<u32>(format));
+            UNREACHABLE();
+        }
+    }
+
+    static ComponentType ComponentTypeFromGPUPixelFormat(
+        Tegra::FramebufferConfig::PixelFormat format) {
+        switch (format) {
+        case Tegra::FramebufferConfig::PixelFormat::ABGR8:
+            return ComponentType::UNorm;
+        default:
+            NGLOG_CRITICAL(HW_GPU, "Unimplemented format={}", static_cast<u32>(format));
+            UNREACHABLE();
+        }
+    }
+
     static bool CheckFormatsBlittable(PixelFormat pixel_format_a, PixelFormat pixel_format_b) {
         SurfaceType a_type = GetFormatType(pixel_format_a);
         SurfaceType b_type = GetFormatType(pixel_format_b);
 
-        if ((a_type == SurfaceType::Color || a_type == SurfaceType::Texture) &&
-            (b_type == SurfaceType::Color || b_type == SurfaceType::Texture)) {
+        if (a_type == SurfaceType::ColorTexture && b_type == SurfaceType::ColorTexture) {
             return true;
         }
 
@@ -148,12 +211,8 @@ struct SurfaceParams {
     }
 
     static SurfaceType GetFormatType(PixelFormat pixel_format) {
-        if ((unsigned int)pixel_format <= static_cast<unsigned int>(PixelFormat::RGBA8)) {
-            return SurfaceType::Color;
-        }
-
-        if ((unsigned int)pixel_format <= static_cast<unsigned int>(PixelFormat::DXT1)) {
-            return SurfaceType::Texture;
+        if (static_cast<size_t>(pixel_format) < MaxPixelFormat) {
+            return SurfaceType::ColorTexture;
         }
 
         // TODO(Subv): Implement the other formats
@@ -231,6 +290,7 @@ struct SurfaceParams {
     bool is_tiled = false;
     PixelFormat pixel_format = PixelFormat::Invalid;
     SurfaceType type = SurfaceType::Invalid;
+    ComponentType component_type = ComponentType::Invalid;
 };
 
 struct CachedSurface : SurfaceParams {

src/video_core/renderer_opengl/gl_shader_decompiler.cpp

@@ -190,9 +190,14 @@ private:
         }
     }
 
-    /// Generates code representing an immediate value
-    static std::string GetImmediate(const Instruction& instr) {
-        return std::to_string(instr.alu.GetImm20());
+    /// Generates code representing a 19-bit immediate value
+    static std::string GetImmediate19(const Instruction& instr) {
+        return std::to_string(instr.alu.GetImm20_19());
+    }
+
+    /// Generates code representing a 32-bit immediate value
+    static std::string GetImmediate32(const Instruction& instr) {
+        return std::to_string(instr.alu.GetImm20_32());
     }
 
     /// Generates code representing a temporary (GPR) register.
@@ -276,7 +281,7 @@ private:
             std::string op_b = instr.alu.negate_b ? "-" : "";
 
             if (instr.is_b_imm) {
-                op_b += GetImmediate(instr);
+                op_b += GetImmediate19(instr);
             } else {
                 if (instr.is_b_gpr) {
                     op_b += GetRegister(instr.gpr20);
@@ -296,6 +301,11 @@ private:
                 SetDest(0, dest, op_a + " * " + op_b, 1, 1, instr.alu.abs_d);
                 break;
             }
+            case OpCode::Id::FMUL32_IMM: {
+                // fmul32i doesn't have abs or neg bits.
+                SetDest(0, dest, GetRegister(instr.gpr8) + " * " + GetImmediate32(instr), 1, 1);
+                break;
+            }
             case OpCode::Id::FADD_C:
             case OpCode::Id::FADD_R:
             case OpCode::Id::FADD_IMM: {
@@ -364,7 +374,7 @@ private:
                 break;
             }
             case OpCode::Id::FFMA_IMM: {
-                op_b += GetImmediate(instr);
+                op_b += GetImmediate19(instr);
                 op_c += GetRegister(instr.gpr39);
                 break;
             }
@@ -399,11 +409,18 @@ private:
                 const std::string op_a = GetRegister(instr.gpr8);
                 const std::string op_b = GetRegister(instr.gpr20);
                 const std::string sampler = GetSampler(instr.sampler);
-                const std::string coord = "vec2(" + op_a + ", " + op_b + ")";
-                const std::string texture = "texture(" + sampler + ", " + coord + ")";
+                const std::string coord = "vec2 coords = vec2(" + op_a + ", " + op_b + ");";
+                // Add an extra scope and declare the texture coords inside to prevent overwriting
+                // them in case they are used as outputs of the texs instruction.
+                shader.AddLine("{");
+                ++shader.scope;
+                shader.AddLine(coord);
+                const std::string texture = "texture(" + sampler + ", coords)";
                 for (unsigned elem = 0; elem < instr.attribute.fmt20.size; ++elem) {
                     SetDest(elem, GetRegister(instr.gpr0, elem), texture, 1, 4);
                 }
+                --shader.scope;
+                shader.AddLine("}");
                 break;
             }
             default: {
@@ -586,7 +603,7 @@ private:
     std::set<Attribute::Index> declr_input_attribute;
     std::set<Attribute::Index> declr_output_attribute;
     std::array<ConstBufferEntry, Maxwell3D::Regs::MaxConstBuffers> declr_const_buffers;
-};
+}; // namespace Decompiler
 
 std::string GetCommonDeclarations() {
     return "bool exec_shader();";

src/video_core/renderer_opengl/gl_shader_gen.cpp

@@ -29,9 +29,15 @@ out gl_PerVertex {
 
 out vec4 position;
 
+layout (std140) uniform vs_config {
+    vec4 viewport_flip;
+};
+
 void main() {
     exec_shader();
 
+    // Viewport can be flipped, which is unsupported by glViewport
+    position.xy *= viewport_flip.xy;
     gl_Position = position;
 }
 )";
@@ -52,6 +58,10 @@ ProgramResult GenerateFragmentShader(const ShaderSetup& setup, const MaxwellFSCo
 in vec4 position;
 out vec4 color;
 
+layout (std140) uniform fs_config {
+    vec4 viewport_flip;
+};
+
 uniform sampler2D tex[32];
 
 void main() {

src/video_core/renderer_opengl/gl_shader_manager.cpp

@@ -53,6 +53,12 @@ void SetShaderSamplerBindings(GLuint shader) {
 
 } // namespace Impl
 
-void MaxwellUniformData::SetFromRegs(const Maxwell3D::State::ShaderStageInfo& shader_stage) {}
+void MaxwellUniformData::SetFromRegs(const Maxwell3D::State::ShaderStageInfo& shader_stage) {
+    const auto& regs = Core::System().GetInstance().GPU().Maxwell3D().regs;
+
+    // TODO(bunnei): Support more than one viewport
+    viewport_flip[0] = regs.viewport_transform[0].scale_x < 0.0 ? -1.0 : 1.0;
+    viewport_flip[1] = regs.viewport_transform[0].scale_y < 0.0 ? -1.0 : 1.0;
+}
 
 } // namespace GLShader

src/video_core/renderer_opengl/gl_shader_manager.h

@@ -30,10 +30,9 @@ void SetShaderSamplerBindings(GLuint shader);
 //       Not following that rule will cause problems on some AMD drivers.
 struct MaxwellUniformData {
     void SetFromRegs(const Maxwell3D::State::ShaderStageInfo& shader_stage);
-    // TODO(Subv): Use this for something.
+    alignas(16) GLvec4 viewport_flip;
 };
-// static_assert(sizeof(MaxwellUniformData) == 1024, "MaxwellUniformData structure size is
-// incorrect");
+static_assert(sizeof(MaxwellUniformData) == 16, "MaxwellUniformData structure size is incorrect");
 static_assert(sizeof(MaxwellUniformData) < 16384,
               "MaxwellUniformData structure must be less than 16kb as per the OpenGL spec");
 

src/video_core/textures/decoders.cpp

@@ -48,8 +48,14 @@ u32 BytesPerPixel(TextureFormat format) {
     case TextureFormat::DXT1:
         // In this case a 'pixel' actually refers to a 4x4 tile.
         return 8;
+    case TextureFormat::DXT23:
+    case TextureFormat::DXT45:
+        // In this case a 'pixel' actually refers to a 4x4 tile.
+        return 16;
     case TextureFormat::A8R8G8B8:
         return 4;
+    case TextureFormat::B5G6R5:
+        return 2;
     default:
         UNIMPLEMENTED_MSG("Format not implemented");
         break;
@@ -65,11 +71,14 @@ std::vector<u8> UnswizzleTexture(VAddr address, TextureFormat format, u32 width,
 
     switch (format) {
     case TextureFormat::DXT1:
-        // In the DXT1 format, each 4x4 tile is swizzled instead of just individual pixel values.
+    case TextureFormat::DXT23:
+    case TextureFormat::DXT45:
+        // In the DXT formats, each 4x4 tile is swizzled instead of just individual pixel values.
         CopySwizzledData(width / 4, height / 4, bytes_per_pixel, bytes_per_pixel, data,
                          unswizzled_data.data(), true, block_height);
         break;
     case TextureFormat::A8R8G8B8:
+    case TextureFormat::B5G6R5:
         CopySwizzledData(width, height, bytes_per_pixel, bytes_per_pixel, data,
                          unswizzled_data.data(), true, block_height);
         break;
@@ -88,7 +97,10 @@ std::vector<u8> DecodeTexture(const std::vector<u8>& texture_data, TextureFormat
     // TODO(Subv): Implement.
     switch (format) {
     case TextureFormat::DXT1:
+    case TextureFormat::DXT23:
+    case TextureFormat::DXT45:
     case TextureFormat::A8R8G8B8:
+    case TextureFormat::B5G6R5:
         // TODO(Subv): For the time being just forward the same data without any decoding.
         rgba_data = texture_data;
         break;

src/video_core/textures/texture.h

@@ -15,6 +15,7 @@ namespace Texture {
 
 enum class TextureFormat : u32 {
     A8R8G8B8 = 0x8,
+    B5G6R5 = 0x15,
     DXT1 = 0x24,
     DXT23 = 0x25,
     DXT45 = 0x26,