From 4e81fc8296c6204645151bbaa23a7d80827a4293 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Sat, 27 Apr 2019 20:50:35 -0300
Subject: shader: Implement texture buffers

---
 src/video_core/engines/shader_bytecode.h | 16 ++++++++++++
 src/video_core/shader/decode/texture.cpp | 44 ++++++++++++++++++++++++++++++++
 src/video_core/shader/shader_ir.h        |  2 ++
 3 files changed, 62 insertions(+)

(limited to 'src')

diff --git a/src/video_core/engines/shader_bytecode.h b/src/video_core/engines/shader_bytecode.h
index ffb3ec3e0..5b32e1249 100644
--- a/src/video_core/engines/shader_bytecode.h
+++ b/src/video_core/engines/shader_bytecode.h
@@ -1231,6 +1231,20 @@ union Instruction {
         }
     } texs;
 
+    union {
+        BitField<28, 1, u64> is_array;
+        BitField<29, 2, TextureType> texture_type;
+        BitField<35, 1, u64> aoffi;
+        BitField<49, 1, u64> nodep_flag;
+        BitField<50, 1, u64> ms; // Multisample?
+        BitField<54, 1, u64> cl;
+        BitField<55, 1, u64> process_mode;
+
+        TextureProcessMode GetTextureProcessMode() const {
+            return process_mode == 0 ? TextureProcessMode::LZ : TextureProcessMode::LL;
+        }
+    } tld;
+
     union {
         BitField<49, 1, u64> nodep_flag;
         BitField<53, 4, u64> texture_info;
@@ -1408,6 +1422,7 @@ public:
         TXQ,    // Texture Query
         TXQ_B,  // Texture Query Bindless
         TEXS,   // Texture Fetch with scalar/non-vec4 source/destinations
+        TLD,    // Texture Load
         TLDS,   // Texture Load with scalar/non-vec4 source/destinations
         TLD4,   // Texture Load 4
         TLD4S,  // Texture Load 4 with scalar / non - vec4 source / destinations
@@ -1682,6 +1697,7 @@ private:
             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("11011100--11----", Id::TLD, Type::Texture, "TLD"),
             INST("1101101---------", Id::TLDS, Type::Texture, "TLDS"),
             INST("110010----111---", Id::TLD4, Type::Texture, "TLD4"),
             INST("1101111100------", Id::TLD4S, Type::Texture, "TLD4S"),
diff --git a/src/video_core/shader/decode/texture.cpp b/src/video_core/shader/decode/texture.cpp
index 4a356dbd4..b22831c64 100644
--- a/src/video_core/shader/decode/texture.cpp
+++ b/src/video_core/shader/decode/texture.cpp
@@ -245,6 +245,18 @@ u32 ShaderIR::DecodeTexture(NodeBlock& bb, u32 pc) {
         }
         break;
     }
+    case OpCode::Id::TLD: {
+        UNIMPLEMENTED_IF_MSG(instr.tld.aoffi, "AOFFI is not implemented");
+        UNIMPLEMENTED_IF_MSG(instr.tld.ms, "MS is not implemented");
+        UNIMPLEMENTED_IF_MSG(instr.tld.cl, "CL is not implemented");
+
+        if (instr.tld.nodep_flag) {
+            LOG_WARNING(HW_GPU, "TLD.NODEP implementation is incomplete");
+        }
+
+        WriteTexInstructionFloat(bb, instr, GetTldCode(instr));
+        break;
+    }
     case OpCode::Id::TLDS: {
         const Tegra::Shader::TextureType texture_type{instr.tlds.GetTextureType()};
         const bool is_array{instr.tlds.IsArrayTexture()};
@@ -575,6 +587,38 @@ Node4 ShaderIR::GetTld4Code(Instruction instr, TextureType texture_type, bool de
     return values;
 }
 
+Node4 ShaderIR::GetTldCode(Tegra::Shader::Instruction instr) {
+    const auto texture_type{instr.tld.texture_type};
+    const bool is_array{instr.tld.is_array};
+    const bool lod_enabled{instr.tld.GetTextureProcessMode() == TextureProcessMode::LL};
+    const std::size_t coord_count{GetCoordCount(texture_type)};
+
+    u64 gpr8_cursor{instr.gpr8.Value()};
+    const Node array_register{is_array ? GetRegister(gpr8_cursor++) : nullptr};
+
+    std::vector<Node> coords;
+    for (std::size_t i = 0; i < coord_count; ++i) {
+        coords.push_back(GetRegister(gpr8_cursor++));
+    }
+
+    u64 gpr20_cursor{instr.gpr20.Value()};
+    // const Node bindless_register{is_bindless ? GetRegister(gpr20_cursor++) : nullptr};
+    const Node lod{lod_enabled ? GetRegister(gpr20_cursor++) : Immediate(0u)};
+    // const Node aoffi_register{is_aoffi ? GetRegister(gpr20_cursor++) : nullptr};
+    // const Node multisample{is_multisample ? GetRegister(gpr20_cursor++) : nullptr};
+
+    const auto& sampler = GetSampler(instr.sampler, texture_type, is_array, false);
+
+    Node4 values;
+    for (u32 element = 0; element < values.size(); ++element) {
+        auto coords_copy = coords;
+        MetaTexture meta{sampler, array_register, {}, {}, {}, lod, {}, element};
+        values[element] = Operation(OperationCode::TexelFetch, meta, std::move(coords_copy));
+    }
+
+    return values;
+}
+
 Node4 ShaderIR::GetTldsCode(Instruction instr, TextureType texture_type, bool is_array) {
     const std::size_t type_coord_count = GetCoordCount(texture_type);
     const bool lod_enabled = instr.tlds.GetTextureProcessMode() == TextureProcessMode::LL;
diff --git a/src/video_core/shader/shader_ir.h b/src/video_core/shader/shader_ir.h
index edcf2288e..1b84c0672 100644
--- a/src/video_core/shader/shader_ir.h
+++ b/src/video_core/shader/shader_ir.h
@@ -277,6 +277,8 @@ private:
     Node4 GetTld4Code(Tegra::Shader::Instruction instr, Tegra::Shader::TextureType texture_type,
                       bool depth_compare, bool is_array, bool is_aoffi);
 
+    Node4 GetTldCode(Tegra::Shader::Instruction instr);
+
     Node4 GetTldsCode(Tegra::Shader::Instruction instr, Tegra::Shader::TextureType texture_type,
                       bool is_array);
 
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