Merge pull request #2348 from FernandoS27/guest-bindless

Implement Bindless Textures on Shader Decompiler and GL backend

8 files changed, 217 insertions, 44 deletions

diff --git a/src/video_core/engines/maxwell_3d.cpp b/src/video_core/engines/maxwell_3d.cpp
index 74403eed4..b198793bc 100644
--- a/src/video_core/engines/maxwell_3d.cpp
+++ b/src/video_core/engines/maxwell_3d.cpp
@@ -482,19 +482,8 @@ std::vector<Texture::FullTextureInfo> Maxwell3D::GetStageTextures(Regs::ShaderSt
     return textures;
 }
 
-Texture::FullTextureInfo Maxwell3D::GetStageTexture(Regs::ShaderStage stage,
-                                                    std::size_t offset) const {
-    auto& shader = state.shader_stages[static_cast<std::size_t>(stage)];
-    auto& tex_info_buffer = shader.const_buffers[regs.tex_cb_index];
-    ASSERT(tex_info_buffer.enabled && tex_info_buffer.address != 0);
-
-    const GPUVAddr tex_info_address =
-        tex_info_buffer.address + offset * sizeof(Texture::TextureHandle);
-
-    ASSERT(tex_info_address < tex_info_buffer.address + tex_info_buffer.size);
-
-    const Texture::TextureHandle tex_handle{memory_manager.Read<u32>(tex_info_address)};
-
+Texture::FullTextureInfo Maxwell3D::GetTextureInfo(const Texture::TextureHandle tex_handle,
+                                                   std::size_t offset) const {
     Texture::FullTextureInfo tex_info{};
     tex_info.index = static_cast<u32>(offset);
 
@@ -511,6 +500,22 @@ Texture::FullTextureInfo Maxwell3D::GetStageTexture(Regs::ShaderStage stage,
     return tex_info;
 }
 
+Texture::FullTextureInfo Maxwell3D::GetStageTexture(Regs::ShaderStage stage,
+                                                    std::size_t offset) const {
+    const auto& shader = state.shader_stages[static_cast<std::size_t>(stage)];
+    const auto& tex_info_buffer = shader.const_buffers[regs.tex_cb_index];
+    ASSERT(tex_info_buffer.enabled && tex_info_buffer.address != 0);
+
+    const GPUVAddr tex_info_address =
+        tex_info_buffer.address + offset * sizeof(Texture::TextureHandle);
+
+    ASSERT(tex_info_address < tex_info_buffer.address + tex_info_buffer.size);
+
+    const Texture::TextureHandle tex_handle{memory_manager.Read<u32>(tex_info_address)};
+
+    return GetTextureInfo(tex_handle, offset);
+}
+
 u32 Maxwell3D::GetRegisterValue(u32 method) const {
     ASSERT_MSG(method < Regs::NUM_REGS, "Invalid Maxwell3D register");
     return regs.reg_array[method];
@@ -524,4 +529,12 @@ void Maxwell3D::ProcessClearBuffers() {
     rasterizer.Clear();
 }
 
+u32 Maxwell3D::AccessConstBuffer32(Regs::ShaderStage stage, u64 const_buffer, u64 offset) const {
+    const auto& shader_stage = state.shader_stages[static_cast<std::size_t>(stage)];
+    const auto& buffer = shader_stage.const_buffers[const_buffer];
+    u32 result;
+    std::memcpy(&result, memory_manager.GetPointer(buffer.address + offset), sizeof(u32));
+    return result;
+}
+
 } // namespace Tegra::Engines
diff --git a/src/video_core/engines/maxwell_3d.h b/src/video_core/engines/maxwell_3d.h
index 321af3297..cc2424d38 100644
--- a/src/video_core/engines/maxwell_3d.h
+++ b/src/video_core/engines/maxwell_3d.h
@@ -1131,12 +1131,18 @@ public:
     /// Write the value to the register identified by method.
     void CallMethod(const GPU::MethodCall& method_call);
 
+    /// Given a Texture Handle, returns the TSC and TIC entries.
+    Texture::FullTextureInfo GetTextureInfo(const Texture::TextureHandle tex_handle,
+                                            std::size_t offset) const;
+
     /// Returns a list of enabled textures for the specified shader stage.
     std::vector<Texture::FullTextureInfo> GetStageTextures(Regs::ShaderStage stage) const;
 
     /// Returns the texture information for a specific texture in a specific shader stage.
     Texture::FullTextureInfo GetStageTexture(Regs::ShaderStage stage, std::size_t offset) const;
 
+    u32 AccessConstBuffer32(Regs::ShaderStage stage, u64 const_buffer, u64 offset) const;
+
     /// Memory for macro code - it's undetermined how big this is, however 1MB is much larger than
     /// we've seen used.
     using MacroMemory = std::array<u32, 0x40000>;
diff --git a/src/video_core/engines/shader_bytecode.h b/src/video_core/engines/shader_bytecode.h
index 38db4addd..fce9733b9 100644
--- a/src/video_core/engines/shader_bytecode.h
+++ b/src/video_core/engines/shader_bytecode.h
@@ -987,6 +987,38 @@ union Instruction {
     } tex;
 
     union {
+        BitField<28, 1, u64> array;
+        BitField<29, 2, TextureType> texture_type;
+        BitField<31, 4, u64> component_mask;
+        BitField<49, 1, u64> nodep_flag;
+        BitField<50, 1, u64> dc_flag;
+        BitField<36, 1, u64> aoffi_flag;
+        BitField<37, 3, TextureProcessMode> process_mode;
+
+        bool IsComponentEnabled(std::size_t component) const {
+            return ((1ULL << component) & component_mask) != 0;
+        }
+
+        TextureProcessMode GetTextureProcessMode() const {
+            return process_mode;
+        }
+
+        bool UsesMiscMode(TextureMiscMode mode) const {
+            switch (mode) {
+            case TextureMiscMode::DC:
+                return dc_flag != 0;
+            case TextureMiscMode::NODEP:
+                return nodep_flag != 0;
+            case TextureMiscMode::AOFFI:
+                return aoffi_flag != 0;
+            default:
+                break;
+            }
+            return false;
+        }
+    } tex_b;
+
+    union {
         BitField<22, 6, TextureQueryType> query_type;
         BitField<31, 4, u64> component_mask;
         BitField<49, 1, u64> nodep_flag;
@@ -1332,7 +1364,9 @@ public:
         LDG, // Load from global memory
         STG, // Store in global memory
         TEX,
+        TEX_B,  // Texture Load Bindless
         TXQ,    // Texture Query
+        TXQ_B,  // Texture Query Bindless
         TEXS,   // Texture Fetch with scalar/non-vec4 source/destinations
         TLDS,   // Texture Load with scalar/non-vec4 source/destinations
         TLD4,   // Texture Load 4
@@ -1600,7 +1634,9 @@ private:
             INST("1110111011010---", Id::LDG, Type::Memory, "LDG"),
             INST("1110111011011---", Id::STG, Type::Memory, "STG"),
             INST("110000----111---", Id::TEX, Type::Texture, "TEX"),
+            INST("1101111010111---", Id::TEX_B, Type::Texture, "TEX_B"),
             INST("1101111101001---", Id::TXQ, Type::Texture, "TXQ"),
+            INST("1101111101010---", Id::TXQ_B, Type::Texture, "TXQ_B"),
             INST("1101-00---------", Id::TEXS, Type::Texture, "TEXS"),
             INST("1101101---------", Id::TLDS, Type::Texture, "TLDS"),
             INST("110010----111---", Id::TLD4, Type::Texture, "TLD4"),
diff --git a/src/video_core/renderer_opengl/gl_rasterizer.cpp b/src/video_core/renderer_opengl/gl_rasterizer.cpp
index 0b1fe3494..86a2e117d 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer.cpp
@@ -974,7 +974,15 @@ void RasterizerOpenGL::SetupTextures(Maxwell::ShaderStage stage, const Shader& s
 
     for (u32 bindpoint = 0; bindpoint < entries.size(); ++bindpoint) {
         const auto& entry = entries[bindpoint];
-        const auto texture = maxwell3d.GetStageTexture(stage, entry.GetOffset());
+        Tegra::Texture::FullTextureInfo texture;
+        if (entry.IsBindless()) {
+            const auto cbuf = entry.GetBindlessCBuf();
+            Tegra::Texture::TextureHandle tex_handle;
+            tex_handle.raw = maxwell3d.AccessConstBuffer32(stage, cbuf.first, cbuf.second);
+            texture = maxwell3d.GetTextureInfo(tex_handle, entry.GetOffset());
+        } else {
+            texture = maxwell3d.GetStageTexture(stage, entry.GetOffset());
+        }
         const u32 current_bindpoint = base_bindings.sampler + bindpoint;
 
         texture_samplers[current_bindpoint].SyncWithConfig(texture.tsc);
diff --git a/src/video_core/renderer_opengl/gl_shader_decompiler.h b/src/video_core/renderer_opengl/gl_shader_decompiler.h
index 55b3d4d7b..74032d237 100644
--- a/src/video_core/renderer_opengl/gl_shader_decompiler.h
+++ b/src/video_core/renderer_opengl/gl_shader_decompiler.h
@@ -69,6 +69,7 @@ private:
 struct ShaderEntries {
     std::vector<ConstBufferEntry> const_buffers;
     std::vector<SamplerEntry> samplers;
+    std::vector<SamplerEntry> bindless_samplers;
     std::vector<GlobalMemoryEntry> global_memory_entries;
     std::array<bool, Maxwell::NumClipDistances> clip_distances{};
     std::size_t shader_length{};
@@ -79,4 +80,4 @@ std::string GetCommonDeclarations();
 ProgramResult Decompile(const VideoCommon::Shader::ShaderIR& ir, Maxwell::ShaderStage stage,
                         const std::string& suffix);
 
-} // namespace OpenGL::GLShader
\ No newline at end of file
+} // namespace OpenGL::GLShader
diff --git a/src/video_core/renderer_opengl/gl_shader_disk_cache.cpp b/src/video_core/renderer_opengl/gl_shader_disk_cache.cpp
index d5890a375..53752b38d 100644
--- a/src/video_core/renderer_opengl/gl_shader_disk_cache.cpp
+++ b/src/video_core/renderer_opengl/gl_shader_disk_cache.cpp
@@ -319,16 +319,19 @@ std::optional<ShaderDiskCacheDecompiled> ShaderDiskCacheOpenGL::LoadDecompiledEn
         u32 type{};
         u8 is_array{};
         u8 is_shadow{};
+        u8 is_bindless{};
         if (file.ReadBytes(&offset, sizeof(u64)) != sizeof(u64) ||
             file.ReadBytes(&index, sizeof(u64)) != sizeof(u64) ||
             file.ReadBytes(&type, sizeof(u32)) != sizeof(u32) ||
             file.ReadBytes(&is_array, sizeof(u8)) != sizeof(u8) ||
-            file.ReadBytes(&is_shadow, sizeof(u8)) != sizeof(u8)) {
+            file.ReadBytes(&is_shadow, sizeof(u8)) != sizeof(u8) ||
+            file.ReadBytes(&is_bindless, sizeof(u8)) != sizeof(u8)) {
             return {};
         }
-        entry.entries.samplers.emplace_back(
-            static_cast<std::size_t>(offset), static_cast<std::size_t>(index),
-            static_cast<Tegra::Shader::TextureType>(type), is_array != 0, is_shadow != 0);
+        entry.entries.samplers.emplace_back(static_cast<std::size_t>(offset),
+                                            static_cast<std::size_t>(index),
+                                            static_cast<Tegra::Shader::TextureType>(type),
+                                            is_array != 0, is_shadow != 0, is_bindless != 0);
     }
 
     u32 global_memory_count{};
@@ -393,7 +396,8 @@ bool ShaderDiskCacheOpenGL::SaveDecompiledFile(FileUtil::IOFile& file, u64 uniqu
             file.WriteObject(static_cast<u64>(sampler.GetIndex())) != 1 ||
             file.WriteObject(static_cast<u32>(sampler.GetType())) != 1 ||
             file.WriteObject(static_cast<u8>(sampler.IsArray() ? 1 : 0)) != 1 ||
-            file.WriteObject(static_cast<u8>(sampler.IsShadow() ? 1 : 0)) != 1) {
+            file.WriteObject(static_cast<u8>(sampler.IsShadow() ? 1 : 0)) != 1 ||
+            file.WriteObject(static_cast<u8>(sampler.IsBindless() ? 1 : 0)) != 1) {
             return false;
         }
     }
diff --git a/src/video_core/shader/decode/texture.cpp b/src/video_core/shader/decode/texture.cpp
index a775b402b..fa65ac9a9 100644
--- a/src/video_core/shader/decode/texture.cpp
+++ b/src/video_core/shader/decode/texture.cpp
@@ -40,7 +40,7 @@ static std::size_t GetCoordCount(TextureType texture_type) {
 u32 ShaderIR::DecodeTexture(NodeBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
-
+    bool is_bindless = false;
     switch (opcode->get().GetId()) {
     case OpCode::Id::TEX: {
         if (instr.tex.UsesMiscMode(TextureMiscMode::NODEP)) {
@@ -54,7 +54,25 @@ u32 ShaderIR::DecodeTexture(NodeBlock& bb, u32 pc) {
         const auto process_mode = instr.tex.GetTextureProcessMode();
         WriteTexInstructionFloat(
             bb, instr,
-            GetTexCode(instr, texture_type, process_mode, depth_compare, is_array, is_aoffi));
+            GetTexCode(instr, texture_type, process_mode, depth_compare, is_array, is_aoffi, {}));
+        break;
+    }
+    case OpCode::Id::TEX_B: {
+        UNIMPLEMENTED_IF_MSG(instr.tex.UsesMiscMode(TextureMiscMode::AOFFI),
+                             "AOFFI is not implemented");
+
+        if (instr.tex.UsesMiscMode(TextureMiscMode::NODEP)) {
+            LOG_WARNING(HW_GPU, "TEX.NODEP implementation is incomplete");
+        }
+
+        const TextureType texture_type{instr.tex_b.texture_type};
+        const bool is_array = instr.tex_b.array != 0;
+        const bool is_aoffi = instr.tex.UsesMiscMode(TextureMiscMode::AOFFI);
+        const bool depth_compare = instr.tex_b.UsesMiscMode(TextureMiscMode::DC);
+        const auto process_mode = instr.tex_b.GetTextureProcessMode();
+        WriteTexInstructionFloat(bb, instr,
+                                 GetTexCode(instr, texture_type, process_mode, depth_compare,
+                                            is_array, is_aoffi, {instr.gpr20}));
         break;
     }
     case OpCode::Id::TEXS: {
@@ -134,6 +152,9 @@ u32 ShaderIR::DecodeTexture(NodeBlock& bb, u32 pc) {
         WriteTexsInstructionFloat(bb, instr, values);
         break;
     }
+    case OpCode::Id::TXQ_B:
+        is_bindless = true;
+        [[fallthrough]];
     case OpCode::Id::TXQ: {
         if (instr.txq.UsesMiscMode(TextureMiscMode::NODEP)) {
             LOG_WARNING(HW_GPU, "TXQ.NODEP implementation is incomplete");
@@ -143,7 +164,10 @@ u32 ShaderIR::DecodeTexture(NodeBlock& bb, u32 pc) {
         // Sadly, not all texture instructions specify the type of texture their sampler
         // uses. This must be fixed at a later instance.
         const auto& sampler =
-            GetSampler(instr.sampler, Tegra::Shader::TextureType::Texture2D, false, false);
+            is_bindless
+                ? GetBindlessSampler(instr.gpr8, Tegra::Shader::TextureType::Texture2D, false,
+                                     false)
+                : GetSampler(instr.sampler, Tegra::Shader::TextureType::Texture2D, false, false);
 
         u32 indexer = 0;
         switch (instr.txq.query_type) {
@@ -154,7 +178,8 @@ u32 ShaderIR::DecodeTexture(NodeBlock& bb, u32 pc) {
                 }
                 MetaTexture meta{sampler, {}, {}, {}, {}, {}, {}, element};
                 const Node value =
-                    Operation(OperationCode::TextureQueryDimensions, meta, GetRegister(instr.gpr8));
+                    Operation(OperationCode::TextureQueryDimensions, meta,
+                              GetRegister(instr.gpr8.Value() + (is_bindless ? 1 : 0)));
                 SetTemporal(bb, indexer++, value);
             }
             for (u32 i = 0; i < indexer; ++i) {
@@ -168,6 +193,9 @@ u32 ShaderIR::DecodeTexture(NodeBlock& bb, u32 pc) {
         }
         break;
     }
+    case OpCode::Id::TMML_B:
+        is_bindless = true;
+        [[fallthrough]];
     case OpCode::Id::TMML: {
         UNIMPLEMENTED_IF_MSG(instr.tmml.UsesMiscMode(Tegra::Shader::TextureMiscMode::NDV),
                              "NDV is not implemented");
@@ -178,7 +206,9 @@ u32 ShaderIR::DecodeTexture(NodeBlock& bb, u32 pc) {
 
         auto texture_type = instr.tmml.texture_type.Value();
         const bool is_array = instr.tmml.array != 0;
-        const auto& sampler = GetSampler(instr.sampler, texture_type, is_array, false);
+        const auto& sampler = is_bindless
+                                  ? GetBindlessSampler(instr.gpr20, texture_type, is_array, false)
+                                  : GetSampler(instr.sampler, texture_type, is_array, false);
 
         std::vector<Node> coords;
 
@@ -199,17 +229,19 @@ u32 ShaderIR::DecodeTexture(NodeBlock& bb, u32 pc) {
             coords.push_back(GetRegister(instr.gpr8.Value() + 1));
             texture_type = TextureType::Texture2D;
         }
-
+        u32 indexer = 0;
         for (u32 element = 0; element < 2; ++element) {
+            if (!instr.tmml.IsComponentEnabled(element)) {
+                continue;
+            }
             auto params = coords;
             MetaTexture meta{sampler, {}, {}, {}, {}, {}, {}, element};
             const Node value = Operation(OperationCode::TextureQueryLod, meta, std::move(params));
-            SetTemporal(bb, element, value);
+            SetTemporal(bb, indexer++, value);
         }
-        for (u32 element = 0; element < 2; ++element) {
-            SetRegister(bb, instr.gpr0.Value() + element, GetTemporal(element));
+        for (u32 i = 0; i < indexer; ++i) {
+            SetRegister(bb, instr.gpr0.Value() + i, GetTemporal(i));
         }
-
         break;
     }
     case OpCode::Id::TLDS: {
@@ -254,6 +286,34 @@ const Sampler& ShaderIR::GetSampler(const Tegra::Shader::Sampler& sampler, Textu
     return *used_samplers.emplace(entry).first;
 }
 
+const Sampler& ShaderIR::GetBindlessSampler(const Tegra::Shader::Register& reg, TextureType type,
+                                            bool is_array, bool is_shadow) {
+    const Node sampler_register = GetRegister(reg);
+    const Node base_sampler =
+        TrackCbuf(sampler_register, global_code, static_cast<s64>(global_code.size()));
+    const auto cbuf = std::get_if<CbufNode>(base_sampler);
+    const auto cbuf_offset_imm = std::get_if<ImmediateNode>(cbuf->GetOffset());
+    ASSERT(cbuf_offset_imm != nullptr);
+    const auto cbuf_offset = cbuf_offset_imm->GetValue();
+    const auto cbuf_index = cbuf->GetIndex();
+    const u64 cbuf_key = (cbuf_index << 32) | cbuf_offset;
+
+    // If this sampler has already been used, return the existing mapping.
+    const auto itr =
+        std::find_if(used_samplers.begin(), used_samplers.end(),
+                     [&](const Sampler& entry) { return entry.GetOffset() == cbuf_key; });
+    if (itr != used_samplers.end()) {
+        ASSERT(itr->GetType() == type && itr->IsArray() == is_array &&
+               itr->IsShadow() == is_shadow);
+        return *itr;
+    }
+
+    // Otherwise create a new mapping for this sampler
+    const std::size_t next_index = used_samplers.size();
+    const Sampler entry{cbuf_index, cbuf_offset, next_index, type, is_array, is_shadow};
+    return *used_samplers.emplace(entry).first;
+}
+
 void ShaderIR::WriteTexInstructionFloat(NodeBlock& bb, Instruction instr, const Node4& components) {
     u32 dest_elem = 0;
     for (u32 elem = 0; elem < 4; ++elem) {
@@ -326,22 +386,27 @@ void ShaderIR::WriteTexsInstructionHalfFloat(NodeBlock& bb, Instruction instr,
 Node4 ShaderIR::GetTextureCode(Instruction instr, TextureType texture_type,
                                TextureProcessMode process_mode, std::vector<Node> coords,
                                Node array, Node depth_compare, u32 bias_offset,
-                               std::vector<Node> aoffi) {
+                               std::vector<Node> aoffi,
+                               std::optional<Tegra::Shader::Register> bindless_reg) {
     const bool is_array = array;
     const bool is_shadow = depth_compare;
+    const bool is_bindless = bindless_reg.has_value();
 
     UNIMPLEMENTED_IF_MSG((texture_type == TextureType::Texture3D && (is_array || is_shadow)) ||
                              (texture_type == TextureType::TextureCube && is_array && is_shadow),
                          "This method is not supported.");
 
-    const auto& sampler = GetSampler(instr.sampler, texture_type, is_array, is_shadow);
+    const auto& sampler = is_bindless
+                              ? GetBindlessSampler(*bindless_reg, texture_type, is_array, is_shadow)
+                              : GetSampler(instr.sampler, texture_type, is_array, is_shadow);
 
     const bool lod_needed = process_mode == TextureProcessMode::LZ ||
                             process_mode == TextureProcessMode::LL ||
                             process_mode == TextureProcessMode::LLA;
 
-    // LOD selection (either via bias or explicit textureLod) not supported in GL for
-    // sampler2DArrayShadow and samplerCubeArrayShadow.
+    // LOD selection (either via bias or explicit textureLod) not
+    // supported in GL for sampler2DArrayShadow and
+    // samplerCubeArrayShadow.
     const bool gl_lod_supported =
         !((texture_type == Tegra::Shader::TextureType::Texture2D && is_array && is_shadow) ||
           (texture_type == Tegra::Shader::TextureType::TextureCube && is_array && is_shadow));
@@ -359,8 +424,9 @@ Node4 ShaderIR::GetTextureCode(Instruction instr, TextureType texture_type,
             lod = Immediate(0.0f);
             break;
         case TextureProcessMode::LB:
-            // If present, lod or bias are always stored in the register indexed by the gpr20
-            // field with an offset depending on the usage of the other registers
+            // If present, lod or bias are always stored in the register
+            // indexed by the gpr20 field with an offset depending on the
+            // usage of the other registers
             bias = GetRegister(instr.gpr20.Value() + bias_offset);
             break;
         case TextureProcessMode::LL:
@@ -384,11 +450,18 @@ Node4 ShaderIR::GetTextureCode(Instruction instr, TextureType texture_type,
 
 Node4 ShaderIR::GetTexCode(Instruction instr, TextureType texture_type,
                            TextureProcessMode process_mode, bool depth_compare, bool is_array,
-                           bool is_aoffi) {
+                           bool is_aoffi, std::optional<Tegra::Shader::Register> bindless_reg) {
     const bool lod_bias_enabled{
         (process_mode != TextureProcessMode::None && process_mode != TextureProcessMode::LZ)};
 
+    const bool is_bindless = bindless_reg.has_value();
+
     u64 parameter_register = instr.gpr20.Value();
+    if (is_bindless) {
+        ++parameter_register;
+    }
+
+    const u32 bias_lod_offset = (is_bindless ? 1 : 0);
     if (lod_bias_enabled) {
         ++parameter_register;
     }
@@ -423,7 +496,8 @@ Node4 ShaderIR::GetTexCode(Instruction instr, TextureType texture_type,
         dc = GetRegister(parameter_register++);
     }
 
-    return GetTextureCode(instr, texture_type, process_mode, coords, array, dc, 0, aoffi);
+    return GetTextureCode(instr, texture_type, process_mode, coords, array, dc, bias_lod_offset,
+                          aoffi, bindless_reg);
 }
 
 Node4 ShaderIR::GetTexsCode(Instruction instr, TextureType texture_type,
@@ -459,7 +533,8 @@ Node4 ShaderIR::GetTexsCode(Instruction instr, TextureType texture_type,
         dc = GetRegister(depth_register);
     }
 
-    return GetTextureCode(instr, texture_type, process_mode, coords, array, dc, bias_offset, {});
+    return GetTextureCode(instr, texture_type, process_mode, coords, array, dc, bias_offset, {},
+                          {});
 }
 
 Node4 ShaderIR::GetTld4Code(Instruction instr, TextureType texture_type, bool depth_compare,
diff --git a/src/video_core/shader/shader_ir.h b/src/video_core/shader/shader_ir.h
index 1afab08c0..57af8b10f 100644
--- a/src/video_core/shader/shader_ir.h
+++ b/src/video_core/shader/shader_ir.h
@@ -196,9 +196,23 @@ enum class ExitMethod {
 
 class Sampler {
 public:
+    // Use this constructor for bounded Samplers
     explicit Sampler(std::size_t offset, std::size_t index, Tegra::Shader::TextureType type,
                      bool is_array, bool is_shadow)
-        : offset{offset}, index{index}, type{type}, is_array{is_array}, is_shadow{is_shadow} {}
+        : offset{offset}, index{index}, type{type}, is_array{is_array}, is_shadow{is_shadow},
+          is_bindless{false} {}
+
+    // Use this constructor for bindless Samplers
+    explicit Sampler(u32 cbuf_index, u32 cbuf_offset, std::size_t index,
+                     Tegra::Shader::TextureType type, bool is_array, bool is_shadow)
+        : offset{(static_cast<u64>(cbuf_index) << 32) | cbuf_offset}, index{index}, type{type},
+          is_array{is_array}, is_shadow{is_shadow}, is_bindless{true} {}
+
+    // Use this only for serialization/deserialization
+    explicit Sampler(std::size_t offset, std::size_t index, Tegra::Shader::TextureType type,
+                     bool is_array, bool is_shadow, bool is_bindless)
+        : offset{offset}, index{index}, type{type}, is_array{is_array}, is_shadow{is_shadow},
+          is_bindless{is_bindless} {}
 
     std::size_t GetOffset() const {
         return offset;
@@ -220,6 +234,14 @@ public:
         return is_shadow;
     }
 
+    bool IsBindless() const {
+        return is_bindless;
+    }
+
+    std::pair<u32, u32> GetBindlessCBuf() const {
+        return {static_cast<u32>(offset >> 32), static_cast<u32>(offset)};
+    }
+
     bool operator<(const Sampler& rhs) const {
         return std::tie(offset, index, type, is_array, is_shadow) <
                std::tie(rhs.offset, rhs.index, rhs.type, rhs.is_array, rhs.is_shadow);
@@ -231,8 +253,9 @@ private:
     std::size_t offset{};
     std::size_t index{}; ///< Value used to index into the generated GLSL sampler array.
     Tegra::Shader::TextureType type{}; ///< The type used to sample this texture (Texture2D, etc)
-    bool is_array{};  ///< Whether the texture is being sampled as an array texture or not.
-    bool is_shadow{}; ///< Whether the texture is being sampled as a depth texture or not.
+    bool is_array{};    ///< Whether the texture is being sampled as an array texture or not.
+    bool is_shadow{};   ///< Whether the texture is being sampled as a depth texture or not.
+    bool is_bindless{}; ///< Whether this sampler belongs to a bindless texture or not.
 };
 
 class ConstBuffer {
@@ -735,6 +758,11 @@ private:
     const Sampler& GetSampler(const Tegra::Shader::Sampler& sampler,
                               Tegra::Shader::TextureType type, bool is_array, bool is_shadow);
 
+    // Accesses a texture sampler for a bindless texture.
+    const Sampler& GetBindlessSampler(const Tegra::Shader::Register& reg,
+                                      Tegra::Shader::TextureType type, bool is_array,
+                                      bool is_shadow);
+
     /// Extracts a sequence of bits from a node
     Node BitfieldExtract(Node value, u32 offset, u32 bits);
 
@@ -748,7 +776,8 @@ private:
 
     Node4 GetTexCode(Tegra::Shader::Instruction instr, Tegra::Shader::TextureType texture_type,
                      Tegra::Shader::TextureProcessMode process_mode, bool depth_compare,
-                     bool is_array, bool is_aoffi);
+                     bool is_array, bool is_aoffi,
+                     std::optional<Tegra::Shader::Register> bindless_reg);
 
     Node4 GetTexsCode(Tegra::Shader::Instruction instr, Tegra::Shader::TextureType texture_type,
                       Tegra::Shader::TextureProcessMode process_mode, bool depth_compare,
@@ -768,7 +797,8 @@ private:
 
     Node4 GetTextureCode(Tegra::Shader::Instruction instr, Tegra::Shader::TextureType texture_type,
                          Tegra::Shader::TextureProcessMode process_mode, std::vector<Node> coords,
-                         Node array, Node depth_compare, u32 bias_offset, std::vector<Node> aoffi);
+                         Node array, Node depth_compare, u32 bias_offset, std::vector<Node> aoffi,
+                         std::optional<Tegra::Shader::Register> bindless_reg);
 
     Node GetVideoOperand(Node op, bool is_chunk, bool is_signed, Tegra::Shader::VideoType type,
                          u64 byte_height);