28 files changed, 1542 insertions, 0 deletions

diff --git a/src/video_core/shader/decode.cpp b/src/video_core/shader/decode.cpp
new file mode 100644
index 000000000..c973328ab
--- /dev/null
+++ b/src/video_core/shader/decode.cpp
@@ -0,0 +1,199 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <cstring>
+#include <set>
+
+#include <fmt/format.h>
+
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/engines/shader_header.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+/// Merges exit method of two parallel branches.
+constexpr ExitMethod ParallelExit(ExitMethod a, ExitMethod b) {
+    if (a == ExitMethod::Undetermined) {
+        return b;
+    }
+    if (b == ExitMethod::Undetermined) {
+        return a;
+    }
+    if (a == b) {
+        return a;
+    }
+    return ExitMethod::Conditional;
+}
+
+/**
+ * Returns whether the instruction at the specified offset is a 'sched' instruction.
+ * Sched instructions always appear before a sequence of 3 instructions.
+ */
+constexpr bool IsSchedInstruction(u32 offset, u32 main_offset) {
+    constexpr u32 SchedPeriod = 4;
+    u32 absolute_offset = offset - main_offset;
+
+    return (absolute_offset % SchedPeriod) == 0;
+}
+
+void ShaderIR::Decode() {
+    std::memcpy(&header, program_code.data(), sizeof(Tegra::Shader::Header));
+
+    std::set<u32> labels;
+    const ExitMethod exit_method = Scan(main_offset, MAX_PROGRAM_LENGTH, labels);
+    if (exit_method != ExitMethod::AlwaysEnd) {
+        UNREACHABLE_MSG("Program does not always end");
+    }
+
+    if (labels.empty()) {
+        basic_blocks.insert({main_offset, DecodeRange(main_offset, MAX_PROGRAM_LENGTH)});
+        return;
+    }
+
+    labels.insert(main_offset);
+
+    for (const u32 label : labels) {
+        const auto next_it = labels.lower_bound(label + 1);
+        const u32 next_label = next_it == labels.end() ? MAX_PROGRAM_LENGTH : *next_it;
+
+        basic_blocks.insert({label, DecodeRange(label, next_label)});
+    }
+}
+
+ExitMethod ShaderIR::Scan(u32 begin, u32 end, std::set<u32>& labels) {
+    const auto [iter, inserted] =
+        exit_method_map.emplace(std::make_pair(begin, end), ExitMethod::Undetermined);
+    ExitMethod& exit_method = iter->second;
+    if (!inserted)
+        return exit_method;
+
+    for (u32 offset = begin; offset != end && offset != MAX_PROGRAM_LENGTH; ++offset) {
+        coverage_begin = std::min(coverage_begin, offset);
+        coverage_end = std::max(coverage_end, offset + 1);
+
+        const Instruction instr = {program_code[offset]};
+        const auto opcode = OpCode::Decode(instr);
+        if (!opcode)
+            continue;
+        switch (opcode->get().GetId()) {
+        case OpCode::Id::EXIT: {
+            // The EXIT instruction can be predicated, which means that the shader can conditionally
+            // end on this instruction. We have to consider the case where the condition is not met
+            // and check the exit method of that other basic block.
+            using Tegra::Shader::Pred;
+            if (instr.pred.pred_index == static_cast<u64>(Pred::UnusedIndex)) {
+                return exit_method = ExitMethod::AlwaysEnd;
+            } else {
+                const ExitMethod not_met = Scan(offset + 1, end, labels);
+                return exit_method = ParallelExit(ExitMethod::AlwaysEnd, not_met);
+            }
+        }
+        case OpCode::Id::BRA: {
+            const u32 target = offset + instr.bra.GetBranchTarget();
+            labels.insert(target);
+            const ExitMethod no_jmp = Scan(offset + 1, end, labels);
+            const ExitMethod jmp = Scan(target, end, labels);
+            return exit_method = ParallelExit(no_jmp, jmp);
+        }
+        case OpCode::Id::SSY:
+        case OpCode::Id::PBK: {
+            // The SSY and PBK use a similar encoding as the BRA instruction.
+            UNIMPLEMENTED_IF_MSG(instr.bra.constant_buffer != 0,
+                                 "Constant buffer branching is not supported");
+            const u32 target = offset + instr.bra.GetBranchTarget();
+            labels.insert(target);
+            // Continue scanning for an exit method.
+            break;
+        }
+        }
+    }
+    return exit_method = ExitMethod::AlwaysReturn;
+}
+
+BasicBlock ShaderIR::DecodeRange(u32 begin, u32 end) {
+    BasicBlock basic_block;
+    for (u32 pc = begin; pc < (begin > end ? MAX_PROGRAM_LENGTH : end);) {
+        pc = DecodeInstr(basic_block, pc);
+    }
+    return std::move(basic_block);
+}
+
+u32 ShaderIR::DecodeInstr(BasicBlock& bb, u32 pc) {
+    // Ignore sched instructions when generating code.
+    if (IsSchedInstruction(pc, main_offset)) {
+        return pc + 1;
+    }
+
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    // Decoding failure
+    if (!opcode) {
+        UNIMPLEMENTED_MSG("Unhandled instruction: {0:x}", instr.value);
+        return pc + 1;
+    }
+
+    bb.push_back(
+        Comment(fmt::format("{}: {} (0x{:016x})", pc, opcode->get().GetName(), instr.value)));
+
+    using Tegra::Shader::Pred;
+    UNIMPLEMENTED_IF_MSG(instr.pred.full_pred == Pred::NeverExecute,
+                         "NeverExecute predicate not implemented");
+
+    static const std::map<OpCode::Type, u32 (ShaderIR::*)(BasicBlock & code, u32 pc)> decoders = {
+        {OpCode::Type::Arithmetic, &ShaderIR::DecodeArithmetic},
+        {OpCode::Type::ArithmeticImmediate, &ShaderIR::DecodeArithmeticImmediate},
+        {OpCode::Type::Bfe, &ShaderIR::DecodeBfe},
+        {OpCode::Type::Bfi, &ShaderIR::DecodeBfi},
+        {OpCode::Type::Shift, &ShaderIR::DecodeShift},
+        {OpCode::Type::ArithmeticInteger, &ShaderIR::DecodeArithmeticInteger},
+        {OpCode::Type::ArithmeticIntegerImmediate, &ShaderIR::DecodeArithmeticIntegerImmediate},
+        {OpCode::Type::ArithmeticHalf, &ShaderIR::DecodeArithmeticHalf},
+        {OpCode::Type::ArithmeticHalfImmediate, &ShaderIR::DecodeArithmeticHalfImmediate},
+        {OpCode::Type::Ffma, &ShaderIR::DecodeFfma},
+        {OpCode::Type::Hfma2, &ShaderIR::DecodeHfma2},
+        {OpCode::Type::Conversion, &ShaderIR::DecodeConversion},
+        {OpCode::Type::Memory, &ShaderIR::DecodeMemory},
+        {OpCode::Type::FloatSetPredicate, &ShaderIR::DecodeFloatSetPredicate},
+        {OpCode::Type::IntegerSetPredicate, &ShaderIR::DecodeIntegerSetPredicate},
+        {OpCode::Type::HalfSetPredicate, &ShaderIR::DecodeHalfSetPredicate},
+        {OpCode::Type::PredicateSetRegister, &ShaderIR::DecodePredicateSetRegister},
+        {OpCode::Type::PredicateSetPredicate, &ShaderIR::DecodePredicateSetPredicate},
+        {OpCode::Type::RegisterSetPredicate, &ShaderIR::DecodeRegisterSetPredicate},
+        {OpCode::Type::FloatSet, &ShaderIR::DecodeFloatSet},
+        {OpCode::Type::IntegerSet, &ShaderIR::DecodeIntegerSet},
+        {OpCode::Type::HalfSet, &ShaderIR::DecodeHalfSet},
+        {OpCode::Type::Xmad, &ShaderIR::DecodeXmad},
+    };
+
+    std::vector<Node> code;
+    if (const auto decoder = decoders.find(opcode->get().GetType()); decoder != decoders.end()) {
+        pc = (this->*decoder->second)(code, pc);
+    } else {
+        pc = DecodeOther(code, pc);
+    }
+
+    // Some instructions (like SSY) don't have a predicate field, they are always unconditionally
+    // executed.
+    const bool can_be_predicated = OpCode::IsPredicatedInstruction(opcode->get().GetId());
+    const auto pred_index = static_cast<u32>(instr.pred.pred_index);
+
+    if (can_be_predicated && pred_index != static_cast<u32>(Pred::UnusedIndex)) {
+        bb.push_back(
+            Conditional(GetPredicate(pred_index, instr.negate_pred != 0), std::move(code)));
+    } else {
+        for (auto& node : code) {
+            bb.push_back(std::move(node));
+        }
+    }
+
+    return pc + 1;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/arithmetic.cpp b/src/video_core/shader/decode/arithmetic.cpp
new file mode 100644
index 000000000..9242a7389
--- /dev/null
+++ b/src/video_core/shader/decode/arithmetic.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeArithmetic(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/arithmetic_half.cpp b/src/video_core/shader/decode/arithmetic_half.cpp
new file mode 100644
index 000000000..3b189b0d1
--- /dev/null
+++ b/src/video_core/shader/decode/arithmetic_half.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeArithmeticHalf(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/arithmetic_half_immediate.cpp b/src/video_core/shader/decode/arithmetic_half_immediate.cpp
new file mode 100644
index 000000000..8d8a2dad9
--- /dev/null
+++ b/src/video_core/shader/decode/arithmetic_half_immediate.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeArithmeticHalfImmediate(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/arithmetic_immediate.cpp b/src/video_core/shader/decode/arithmetic_immediate.cpp
new file mode 100644
index 000000000..18fd2082e
--- /dev/null
+++ b/src/video_core/shader/decode/arithmetic_immediate.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeArithmeticImmediate(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/arithmetic_integer.cpp b/src/video_core/shader/decode/arithmetic_integer.cpp
new file mode 100644
index 000000000..12c64e97a
--- /dev/null
+++ b/src/video_core/shader/decode/arithmetic_integer.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeArithmeticInteger(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/arithmetic_integer_immediate.cpp b/src/video_core/shader/decode/arithmetic_integer_immediate.cpp
new file mode 100644
index 000000000..46f340235
--- /dev/null
+++ b/src/video_core/shader/decode/arithmetic_integer_immediate.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeArithmeticIntegerImmediate(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/bfe.cpp b/src/video_core/shader/decode/bfe.cpp
new file mode 100644
index 000000000..ffd904c54
--- /dev/null
+++ b/src/video_core/shader/decode/bfe.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeBfe(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/bfi.cpp b/src/video_core/shader/decode/bfi.cpp
new file mode 100644
index 000000000..b94d46ce6
--- /dev/null
+++ b/src/video_core/shader/decode/bfi.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeBfi(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/conversion.cpp b/src/video_core/shader/decode/conversion.cpp
new file mode 100644
index 000000000..c6eb2952c
--- /dev/null
+++ b/src/video_core/shader/decode/conversion.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeConversion(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/decode_integer_set.cpp b/src/video_core/shader/decode/decode_integer_set.cpp
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/src/video_core/shader/decode/decode_integer_set.cpp
diff --git a/src/video_core/shader/decode/ffma.cpp b/src/video_core/shader/decode/ffma.cpp
new file mode 100644
index 000000000..2044113f0
--- /dev/null
+++ b/src/video_core/shader/decode/ffma.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeFfma(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/float_set.cpp b/src/video_core/shader/decode/float_set.cpp
new file mode 100644
index 000000000..17d47c17a
--- /dev/null
+++ b/src/video_core/shader/decode/float_set.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeFloatSet(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/float_set_predicate.cpp b/src/video_core/shader/decode/float_set_predicate.cpp
new file mode 100644
index 000000000..1dbe34353
--- /dev/null
+++ b/src/video_core/shader/decode/float_set_predicate.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeFloatSetPredicate(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/half_set.cpp b/src/video_core/shader/decode/half_set.cpp
new file mode 100644
index 000000000..af363d5d2
--- /dev/null
+++ b/src/video_core/shader/decode/half_set.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeHalfSet(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/half_set_predicate.cpp b/src/video_core/shader/decode/half_set_predicate.cpp
new file mode 100644
index 000000000..5fe123ea5
--- /dev/null
+++ b/src/video_core/shader/decode/half_set_predicate.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeHalfSetPredicate(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/hfma2.cpp b/src/video_core/shader/decode/hfma2.cpp
new file mode 100644
index 000000000..5ce08481e
--- /dev/null
+++ b/src/video_core/shader/decode/hfma2.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeHfma2(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/integer_set.cpp b/src/video_core/shader/decode/integer_set.cpp
new file mode 100644
index 000000000..316a7d8ad
--- /dev/null
+++ b/src/video_core/shader/decode/integer_set.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeIntegerSet(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/integer_set_predicate.cpp b/src/video_core/shader/decode/integer_set_predicate.cpp
new file mode 100644
index 000000000..10975c394
--- /dev/null
+++ b/src/video_core/shader/decode/integer_set_predicate.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeIntegerSetPredicate(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/memory.cpp b/src/video_core/shader/decode/memory.cpp
new file mode 100644
index 000000000..d6086004b
--- /dev/null
+++ b/src/video_core/shader/decode/memory.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeMemory(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/other.cpp b/src/video_core/shader/decode/other.cpp
new file mode 100644
index 000000000..d84702a4f
--- /dev/null
+++ b/src/video_core/shader/decode/other.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeOther(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/predicate_set_predicate.cpp b/src/video_core/shader/decode/predicate_set_predicate.cpp
new file mode 100644
index 000000000..1ad853fda
--- /dev/null
+++ b/src/video_core/shader/decode/predicate_set_predicate.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodePredicateSetPredicate(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/predicate_set_register.cpp b/src/video_core/shader/decode/predicate_set_register.cpp
new file mode 100644
index 000000000..67a06b5b4
--- /dev/null
+++ b/src/video_core/shader/decode/predicate_set_register.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodePredicateSetRegister(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/register_set_predicate.cpp b/src/video_core/shader/decode/register_set_predicate.cpp
new file mode 100644
index 000000000..29a348cf5
--- /dev/null
+++ b/src/video_core/shader/decode/register_set_predicate.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeRegisterSetPredicate(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/shift.cpp b/src/video_core/shader/decode/shift.cpp
new file mode 100644
index 000000000..41f5b8cb0
--- /dev/null
+++ b/src/video_core/shader/decode/shift.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeShift(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/decode/xmad.cpp b/src/video_core/shader/decode/xmad.cpp
new file mode 100644
index 000000000..27a2fc05d
--- /dev/null
+++ b/src/video_core/shader/decode/xmad.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeXmad(BasicBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED();
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/shader_ir.cpp b/src/video_core/shader/shader_ir.cpp
new file mode 100644
index 000000000..db00c8902
--- /dev/null
+++ b/src/video_core/shader/shader_ir.cpp
@@ -0,0 +1,105 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <cmath>
+#include <unordered_map>
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Attribute;
+using Tegra::Shader::Instruction;
+using Tegra::Shader::IpaMode;
+using Tegra::Shader::Pred;
+using Tegra::Shader::PredCondition;
+using Tegra::Shader::PredOperation;
+using Tegra::Shader::Register;
+
+Node ShaderIR::StoreNode(NodeData&& node_data) {
+    auto store = std::make_unique<NodeData>(node_data);
+    const Node node = store.get();
+    stored_nodes.push_back(std::move(store));
+    return node;
+}
+
+Node ShaderIR::Conditional(Node condition, std::vector<Node>&& code) {
+    return StoreNode(ConditionalNode(condition, std::move(code)));
+}
+
+Node ShaderIR::Comment(const std::string& text) {
+    return StoreNode(CommentNode(text));
+}
+
+Node ShaderIR::GetPredicate(u64 pred_, bool negated) {
+    const auto pred = static_cast<Pred>(pred_);
+    if (pred != Pred::UnusedIndex && pred != Pred::NeverExecute) {
+        used_predicates.insert(pred);
+    }
+
+    return StoreNode(PredicateNode(pred, negated));
+}
+
+/*static*/ OperationCode ShaderIR::SignedToUnsignedCode(OperationCode operation_code,
+                                                        bool is_signed) {
+    if (is_signed) {
+        return operation_code;
+    }
+    switch (operation_code) {
+    case OperationCode::FCastInteger:
+        return OperationCode::FCastUInteger;
+    case OperationCode::IAdd:
+        return OperationCode::UAdd;
+    case OperationCode::IMul:
+        return OperationCode::UMul;
+    case OperationCode::IDiv:
+        return OperationCode::UDiv;
+    case OperationCode::IMin:
+        return OperationCode::UMin;
+    case OperationCode::IMax:
+        return OperationCode::UMax;
+    case OperationCode::ICastFloat:
+        return OperationCode::UCastFloat;
+    case OperationCode::ICastUnsigned:
+        return OperationCode::UCastSigned;
+    case OperationCode::ILogicalShiftLeft:
+        return OperationCode::ULogicalShiftLeft;
+    case OperationCode::ILogicalShiftRight:
+        return OperationCode::ULogicalShiftRight;
+    case OperationCode::IArithmeticShiftRight:
+        return OperationCode::UArithmeticShiftRight;
+    case OperationCode::IBitwiseAnd:
+        return OperationCode::UBitwiseAnd;
+    case OperationCode::IBitwiseOr:
+        return OperationCode::UBitwiseOr;
+    case OperationCode::IBitwiseXor:
+        return OperationCode::UBitwiseXor;
+    case OperationCode::IBitwiseNot:
+        return OperationCode::UBitwiseNot;
+    case OperationCode::IBitfieldInsert:
+        return OperationCode::UBitfieldInsert;
+    case OperationCode::LogicalILessThan:
+        return OperationCode::LogicalULessThan;
+    case OperationCode::LogicalIEqual:
+        return OperationCode::LogicalUEqual;
+    case OperationCode::LogicalILessEqual:
+        return OperationCode::LogicalULessEqual;
+    case OperationCode::LogicalIGreaterThan:
+        return OperationCode::LogicalUGreaterThan;
+    case OperationCode::LogicalINotEqual:
+        return OperationCode::LogicalUNotEqual;
+    case OperationCode::LogicalIGreaterEqual:
+        return OperationCode::LogicalUGreaterEqual;
+    case OperationCode::INegate:
+        UNREACHABLE_MSG("Can't negate an unsigned integer");
+    case OperationCode::IAbsolute:
+        UNREACHABLE_MSG("Can't apply absolute to an unsigned integer");
+    }
+    UNREACHABLE_MSG("Unknown signed operation with code={}", static_cast<u32>(operation_code));
+}
+
+} // namespace VideoCommon::Shader
\ No newline at end of file
diff --git a/src/video_core/shader/shader_ir.h b/src/video_core/shader/shader_ir.h
new file mode 100644
index 000000000..300cf1083
--- /dev/null
+++ b/src/video_core/shader/shader_ir.h
@@ -0,0 +1,662 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <map>
+#include <set>
+#include <string>
+#include <tuple>
+#include <variant>
+#include <vector>
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/maxwell_3d.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/engines/shader_header.h"
+
+namespace VideoCommon::Shader {
+
+class OperationNode;
+class ConditionalNode;
+class GprNode;
+class ImmediateNode;
+class InternalFlagNode;
+class PredicateNode;
+class AbufNode; ///< Attribute buffer
+class CbufNode; ///< Constant buffer
+class LmemNode; ///< Local memory
+class GmemNode; ///< Global memory
+class CommentNode;
+
+using ProgramCode = std::vector<u64>;
+
+using NodeData =
+    std::variant<OperationNode, ConditionalNode, GprNode, ImmediateNode, InternalFlagNode,
+                 PredicateNode, AbufNode, CbufNode, LmemNode, GmemNode, CommentNode>;
+using Node = const NodeData*;
+using BasicBlock = std::vector<Node>;
+
+constexpr u32 MAX_PROGRAM_LENGTH = 0x1000;
+
+constexpr u32 RZ = 0xff;
+
+enum class OperationCode {
+    Assign,          /// (float& dest, float src) -> void
+    AssignComposite, /// (MetaComponents, float4 src, float&[4] dst) -> void
+
+    Composite, /// (float[4] values) -> float4
+    Select,    /// (MetaArithmetic, bool pred, float a, float b) -> float
+
+    FAdd,          /// (MetaArithmetic, float a, float b) -> float
+    FMul,          /// (MetaArithmetic, float a, float b) -> float
+    FDiv,          /// (MetaArithmetic, float a, float b) -> float
+    FFma,          /// (MetaArithmetic, float a, float b, float c) -> float
+    FNegate,       /// (MetaArithmetic, float a) -> float
+    FAbsolute,     /// (MetaArithmetic, float a) -> float
+    FClamp,        /// (MetaArithmetic, float value, float min, float max) -> float
+    FMin,          /// (MetaArithmetic, float a, float b) -> float
+    FMax,          /// (MetaArithmetic, float a, float b) -> float
+    FCos,          /// (MetaArithmetic, float a) -> float
+    FSin,          /// (MetaArithmetic, float a) -> float
+    FExp2,         /// (MetaArithmetic, float a) -> float
+    FLog2,         /// (MetaArithmetic, float a) -> float
+    FInverseSqrt,  /// (MetaArithmetic, float a) -> float
+    FSqrt,         /// (MetaArithmetic, float a) -> float
+    FRoundEven,    /// (MetaArithmetic, float a) -> float
+    FFloor,        /// (MetaArithmetic, float a) -> float
+    FCeil,         /// (MetaArithmetic, float a) -> float
+    FTrunc,        /// (MetaArithmetic, float a) -> float
+    FCastInteger,  /// (MetaArithmetic, int a) -> float
+    FCastUInteger, /// (MetaArithmetic, uint a) -> float
+
+    IAdd,                  /// (MetaArithmetic, int a, int b) -> int
+    IMul,                  /// (MetaArithmetic, int a, int b) -> int
+    IDiv,                  /// (MetaArithmetic, int a, int b) -> int
+    INegate,               /// (MetaArithmetic, int a) -> int
+    IAbsolute,             /// (MetaArithmetic, int a) -> int
+    IMin,                  /// (MetaArithmetic, int a, int b) -> int
+    IMax,                  /// (MetaArithmetic, int a, int b) -> int
+    ICastFloat,            /// (MetaArithmetic, float a) -> int
+    ICastUnsigned,         /// (MetaArithmetic, uint a) -> int
+    ILogicalShiftLeft,     /// (MetaArithmetic, int a, uint b) -> int
+    ILogicalShiftRight,    /// (MetaArithmetic, int a, uint b) -> int
+    IArithmeticShiftRight, /// (MetaArithmetic, int a, uint b) -> int
+    IBitwiseAnd,           /// (MetaArithmetic, int a, int b) -> int
+    IBitwiseOr,            /// (MetaArithmetic, int a, int b) -> int
+    IBitwiseXor,           /// (MetaArithmetic, int a, int b) -> int
+    IBitwiseNot,           /// (MetaArithmetic, int a) -> int
+    IBitfieldInsert,       /// (MetaArithmetic, int base, int insert, int offset, int bits) -> int
+
+    UAdd,                  /// (MetaArithmetic, uint a, uint b) -> uint
+    UMul,                  /// (MetaArithmetic, uint a, uint b) -> uint
+    UDiv,                  /// (MetaArithmetic, uint a, uint b) -> uint
+    UMin,                  /// (MetaArithmetic, uint a, uint b) -> uint
+    UMax,                  /// (MetaArithmetic, uint a, uint b) -> uint
+    UCastFloat,            /// (MetaArithmetic, float a) -> uint
+    UCastSigned,           /// (MetaArithmetic, int a) -> uint
+    ULogicalShiftLeft,     /// (MetaArithmetic, uint a, uint b) -> uint
+    ULogicalShiftRight,    /// (MetaArithmetic, uint a, uint b) -> uint
+    UArithmeticShiftRight, /// (MetaArithmetic, uint a, uint b) -> uint
+    UBitwiseAnd,           /// (MetaArithmetic, uint a, uint b) -> uint
+    UBitwiseOr,            /// (MetaArithmetic, uint a, uint b) -> uint
+    UBitwiseXor,           /// (MetaArithmetic, uint a, uint b) -> uint
+    UBitwiseNot,           /// (MetaArithmetic, uint a) -> int
+    UBitfieldInsert, /// (MetaArithmetic, uint base, uint insert, int offset, int bits) -> uint
+
+    HAdd,      /// (MetaHalfArithmetic, f16vec2 a, f16vec2 b) -> f16vec2
+    HMul,      /// (MetaHalfArithmetic, f16vec2 a, f16vec2 b) -> f16vec2
+    HAbsolute, /// (f16vec2 a) -> f16vec2
+    HNegate,   /// (f16vec2 a, bool first, bool second) -> f16vec2
+    HMergeF32, /// (f16vec2 src) -> float
+    HMergeH0,  /// (f16vec2 dest, f16vec2 src) -> f16vec2
+    HMergeH1,  /// (f16vec2 dest, f16vec2 src) -> f16vec2
+
+    LogicalAssign, /// (bool& dst, bool src) -> void
+    LogicalAnd,    /// (bool a, bool b) -> bool
+    LogicalOr,     /// (bool a, bool b) -> bool
+    LogicalXor,    /// (bool a, bool b) -> bool
+    LogicalNegate, /// (bool a) -> bool
+
+    LogicalFLessThan,     /// (float a, float b) -> bool
+    LogicalFEqual,        /// (float a, float b) -> bool
+    LogicalFLessEqual,    /// (float a, float b) -> bool
+    LogicalFGreaterThan,  /// (float a, float b) -> bool
+    LogicalFNotEqual,     /// (float a, float b) -> bool
+    LogicalFGreaterEqual, /// (float a, float b) -> bool
+    LogicalFIsNan,        /// (float a) -> bool
+
+    LogicalILessThan,     /// (int a, int b) -> bool
+    LogicalIEqual,        /// (int a, int b) -> bool
+    LogicalILessEqual,    /// (int a, int b) -> bool
+    LogicalIGreaterThan,  /// (int a, int b) -> bool
+    LogicalINotEqual,     /// (int a, int b) -> bool
+    LogicalIGreaterEqual, /// (int a, int b) -> bool
+
+    LogicalULessThan,     /// (uint a, uint b) -> bool
+    LogicalUEqual,        /// (uint a, uint b) -> bool
+    LogicalULessEqual,    /// (uint a, uint b) -> bool
+    LogicalUGreaterThan,  /// (uint a, uint b) -> bool
+    LogicalUNotEqual,     /// (uint a, uint b) -> bool
+    LogicalUGreaterEqual, /// (uint a, uint b) -> bool
+
+    LogicalHLessThan,     /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool
+    LogicalHEqual,        /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool
+    LogicalHLessEqual,    /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool
+    LogicalHGreaterThan,  /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool
+    LogicalHNotEqual,     /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool
+    LogicalHGreaterEqual, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool
+
+    F4Texture,                /// (MetaTexture, float[N] coords, float[M] params) -> float4
+    F4TextureLod,             /// (MetaTexture, float[N] coords, float[M] params) -> float4
+    F4TextureGather,          /// (MetaTexture, float[N] coords, float[M] params) -> float4
+    F4TextureQueryDimensions, /// (MetaTexture, float a) -> float4
+    F4TextureQueryLod,        /// (MetaTexture, float[N] coords) -> float4
+
+    Ipa, /// (abuf src) -> float
+
+    Bra,  /// (uint branch_target) -> void
+    Ssy,  /// (uint branch_target) -> void
+    Pbk,  /// (uint branch_target) -> void
+    Sync, /// () -> void
+    Brk,  /// () -> void
+    Exit, /// () -> void
+    Kil,  /// () -> void
+
+    YNegate, /// () -> float
+
+    Amount,
+};
+
+enum class InternalFlag {
+    Zero = 0,
+    Sign = 1,
+    Carry = 2,
+    Overflow = 3,
+    Amount = 4,
+};
+
+/// Describes the behaviour of code path of a given entry point and a return point.
+enum class ExitMethod {
+    Undetermined, ///< Internal value. Only occur when analyzing JMP loop.
+    AlwaysReturn, ///< All code paths reach the return point.
+    Conditional,  ///< Code path reaches the return point or an END instruction conditionally.
+    AlwaysEnd,    ///< All code paths reach a END instruction.
+};
+
+class Sampler {
+public:
+    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} {}
+
+    std::size_t GetOffset() const {
+        return offset;
+    }
+
+    u32 GetIndex() const {
+        return static_cast<u32>(index);
+    }
+
+    Tegra::Shader::TextureType GetType() const {
+        return type;
+    }
+
+    bool IsArray() const {
+        return is_array;
+    }
+
+    bool IsShadow() const {
+        return is_shadow;
+    }
+
+    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);
+    }
+
+private:
+    /// Offset in TSC memory from which to read the sampler object, as specified by the sampling
+    /// instruction.
+    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.
+};
+
+class ConstBuffer {
+public:
+    void MarkAsUsed(u64 offset) {
+        max_offset = std::max(max_offset, static_cast<u32>(offset));
+    }
+
+    void MarkAsUsedIndirect() {
+        is_indirect = true;
+    }
+
+    bool IsIndirect() const {
+        return is_indirect;
+    }
+
+    u32 GetSize() const {
+        return max_offset + 1;
+    }
+
+private:
+    u32 max_offset{};
+    bool is_indirect{};
+};
+
+struct MetaArithmetic {
+    bool precise{};
+};
+
+struct MetaHalfArithmetic {
+    bool precise{};
+    std::array<Tegra::Shader::HalfType, 3> types = {Tegra::Shader::HalfType::H0_H1,
+                                                    Tegra::Shader::HalfType::H0_H1,
+                                                    Tegra::Shader::HalfType::H0_H1};
+    bool and_comparison{};
+};
+
+struct MetaTexture {
+    const Sampler& sampler;
+    u32 coords_count{};
+};
+
+struct MetaComponents {
+    std::array<u32, 4> components_map{};
+
+    u32 GetSourceComponent(u32 dest_index) const {
+        return components_map[dest_index];
+    }
+};
+
+constexpr MetaArithmetic PRECISE = {true};
+constexpr MetaArithmetic NO_PRECISE = {false};
+constexpr MetaHalfArithmetic HALF_NO_PRECISE = {false};
+
+using Meta = std::variant<MetaArithmetic, MetaHalfArithmetic, MetaTexture, MetaComponents>;
+
+/// Holds any kind of operation that can be done in the IR
+class OperationNode final {
+public:
+    template <typename... T>
+    explicit constexpr OperationNode(OperationCode code) : code{code}, meta{} {}
+
+    template <typename... T>
+    explicit constexpr OperationNode(OperationCode code, Meta&& meta)
+        : code{code}, meta{std::move(meta)} {}
+
+    template <typename... T>
+    explicit constexpr OperationNode(OperationCode code, const T*... operands)
+        : OperationNode(code, {}, operands...) {}
+
+    template <typename... T>
+    explicit constexpr OperationNode(OperationCode code, Meta&& meta, const T*... operands_)
+        : code{code}, meta{std::move(meta)} {
+
+        auto operands_list = {operands_...};
+        for (auto& operand : operands_list) {
+            operands.push_back(operand);
+        }
+    }
+
+    explicit OperationNode(OperationCode code, Meta&& meta, std::vector<Node>&& operands)
+        : code{code}, meta{meta}, operands{std::move(operands)} {}
+
+    explicit OperationNode(OperationCode code, std::vector<Node>&& operands)
+        : code{code}, meta{}, operands{std::move(operands)} {}
+
+    OperationCode GetCode() const {
+        return code;
+    }
+
+    const Meta& GetMeta() const {
+        return meta;
+    }
+
+    std::size_t GetOperandsCount() const {
+        return operands.size();
+    }
+
+    Node operator[](std::size_t operand_index) const {
+        return operands.at(operand_index);
+    }
+
+private:
+    const OperationCode code;
+    const Meta meta;
+    std::vector<Node> operands;
+};
+
+/// Encloses inside any kind of node that returns a boolean conditionally-executed code
+class ConditionalNode final {
+public:
+    explicit ConditionalNode(Node condition, std::vector<Node>&& code)
+        : condition{condition}, code{std::move(code)} {}
+
+    Node GetCondition() const {
+        return condition;
+    }
+
+    const std::vector<Node>& GetCode() const {
+        return code;
+    }
+
+private:
+    const Node condition;   ///< Condition to be satisfied
+    std::vector<Node> code; ///< Code to execute
+};
+
+/// A general purpose register
+class GprNode final {
+public:
+    explicit constexpr GprNode(Tegra::Shader::Register index) : index{index} {}
+
+    u32 GetIndex() const {
+        return static_cast<u32>(index);
+    }
+
+private:
+    const Tegra::Shader::Register index;
+};
+
+/// A 32-bits value that represents an immediate value
+class ImmediateNode final {
+public:
+    explicit constexpr ImmediateNode(u32 value) : value{value} {}
+
+    u32 GetValue() const {
+        return value;
+    }
+
+private:
+    const u32 value;
+};
+
+/// One of Maxwell's internal flags
+class InternalFlagNode final {
+public:
+    explicit constexpr InternalFlagNode(InternalFlag flag) : flag{flag} {}
+
+    InternalFlag GetFlag() const {
+        return flag;
+    }
+
+private:
+    const InternalFlag flag;
+};
+
+/// A predicate register, it can be negated without aditional nodes
+class PredicateNode final {
+public:
+    explicit constexpr PredicateNode(Tegra::Shader::Pred index, bool negated)
+        : index{index}, negated{negated} {}
+
+    Tegra::Shader::Pred GetIndex() const {
+        return index;
+    }
+
+    bool IsNegated() const {
+        return negated;
+    }
+
+private:
+    const Tegra::Shader::Pred index;
+    const bool negated;
+};
+
+/// Attribute buffer memory (known as attributes or varyings in GLSL terms)
+class AbufNode final {
+public:
+    explicit constexpr AbufNode(Tegra::Shader::Attribute::Index index, u32 element,
+                                const Tegra::Shader::IpaMode& input_mode, Node buffer = {})
+        : input_mode{input_mode}, index{index}, element{element}, buffer{buffer} {}
+
+    explicit constexpr AbufNode(Tegra::Shader::Attribute::Index index, u32 element,
+                                Node buffer = {})
+        : input_mode{}, index{index}, element{element}, buffer{buffer} {}
+
+    Tegra::Shader::IpaMode GetInputMode() const {
+        return input_mode;
+    }
+
+    Tegra::Shader::Attribute::Index GetIndex() const {
+        return index;
+    }
+
+    u32 GetElement() const {
+        return element;
+    }
+
+    Node GetBuffer() const {
+        return buffer;
+    }
+
+private:
+    const Tegra::Shader::IpaMode input_mode;
+    const Node buffer;
+    const Tegra::Shader::Attribute::Index index;
+    const u32 element;
+};
+
+/// Constant buffer node, usually mapped to uniform buffers in GLSL
+class CbufNode final {
+public:
+    explicit constexpr CbufNode(u32 index, Node offset) : index{index}, offset{offset} {}
+
+    u32 GetIndex() const {
+        return index;
+    }
+
+    Node GetOffset() const {
+        return offset;
+    }
+
+private:
+    const u32 index;
+    const Node offset;
+};
+
+/// Local memory node
+class LmemNode final {
+public:
+    explicit constexpr LmemNode(Node address) : address{address} {}
+
+    Node GetAddress() const {
+        return address;
+    }
+
+private:
+    const Node address;
+};
+
+/// Global memory node
+class GmemNode final {
+public:
+    explicit GmemNode(Node address) : address{address} {}
+
+    Node GetAddress() const {
+        return address;
+    }
+
+private:
+    const Node address;
+};
+
+/// Commentary, can be dropped
+class CommentNode final {
+public:
+    explicit CommentNode(const std::string& text) : text{text} {}
+
+    const std::string& GetText() const {
+        return text;
+    }
+
+private:
+    const std::string text;
+};
+
+class ShaderIR final {
+public:
+    explicit ShaderIR(const ProgramCode& program_code, u32 main_offset)
+        : program_code{program_code}, main_offset{main_offset} {
+
+        Decode();
+    }
+
+    const std::map<u32, BasicBlock>& GetBasicBlocks() const {
+        return basic_blocks;
+    }
+
+    const std::set<u32>& GetRegisters() const {
+        return used_registers;
+    }
+
+    const std::set<Tegra::Shader::Pred>& GetPredicates() const {
+        return used_predicates;
+    }
+
+    const std::map<Tegra::Shader::Attribute::Index, std::set<Tegra::Shader::IpaMode>>&
+    GetInputAttributes() const {
+        return used_input_attributes;
+    }
+
+    const std::set<Tegra::Shader::Attribute::Index>& GetOutputAttributes() const {
+        return used_output_attributes;
+    }
+
+    const std::map<u32, ConstBuffer>& GetConstantBuffers() const {
+        return used_cbufs;
+    }
+
+    const std::set<Sampler>& GetSamplers() const {
+        return used_samplers;
+    }
+
+    const std::array<bool, Tegra::Engines::Maxwell3D::Regs::NumClipDistances>& GetClipDistances()
+        const {
+        return used_clip_distances;
+    }
+
+    std::size_t GetLength() const {
+        return static_cast<std::size_t>(coverage_end * sizeof(u64));
+    }
+
+    const Tegra::Shader::Header& GetHeader() const {
+        return header;
+    }
+
+private:
+    void Decode();
+
+    ExitMethod Scan(u32 begin, u32 end, std::set<u32>& labels);
+
+    BasicBlock DecodeRange(u32 begin, u32 end);
+
+    /**
+     * Decodes a single instruction from Tegra to IR.
+     * @param bb Basic block where the nodes will be written to.
+     * @param pc Program counter. Offset to decode.
+     * @return Next address to decode.
+     */
+    u32 DecodeInstr(BasicBlock& bb, u32 pc);
+
+    u32 DecodeArithmetic(BasicBlock& bb, u32 pc);
+    u32 DecodeArithmeticImmediate(BasicBlock& bb, u32 pc);
+    u32 DecodeBfe(BasicBlock& bb, u32 pc);
+    u32 DecodeBfi(BasicBlock& bb, u32 pc);
+    u32 DecodeShift(BasicBlock& bb, u32 pc);
+    u32 DecodeArithmeticInteger(BasicBlock& bb, u32 pc);
+    u32 DecodeArithmeticIntegerImmediate(BasicBlock& bb, u32 pc);
+    u32 DecodeArithmeticHalf(BasicBlock& bb, u32 pc);
+    u32 DecodeArithmeticHalfImmediate(BasicBlock& bb, u32 pc);
+    u32 DecodeFfma(BasicBlock& bb, u32 pc);
+    u32 DecodeHfma2(BasicBlock& bb, u32 pc);
+    u32 DecodeConversion(BasicBlock& bb, u32 pc);
+    u32 DecodeMemory(BasicBlock& bb, u32 pc);
+    u32 DecodeFloatSetPredicate(BasicBlock& bb, u32 pc);
+    u32 DecodeIntegerSetPredicate(BasicBlock& bb, u32 pc);
+    u32 DecodeHalfSetPredicate(BasicBlock& bb, u32 pc);
+    u32 DecodePredicateSetRegister(BasicBlock& bb, u32 pc);
+    u32 DecodePredicateSetPredicate(BasicBlock& bb, u32 pc);
+    u32 DecodeRegisterSetPredicate(BasicBlock& bb, u32 pc);
+    u32 DecodeFloatSet(BasicBlock& bb, u32 pc);
+    u32 DecodeIntegerSet(BasicBlock& bb, u32 pc);
+    u32 DecodeHalfSet(BasicBlock& bb, u32 pc);
+    u32 DecodeXmad(BasicBlock& bb, u32 pc);
+    u32 DecodeOther(BasicBlock& bb, u32 pc);
+
+    /// Internalizes node's data and returns a managed pointer to a clone of that node
+    Node StoreNode(NodeData&& node_data);
+
+    /// Creates a conditional node
+    Node Conditional(Node condition, std::vector<Node>&& code);
+    /// Creates a commentary
+    Node Comment(const std::string& text);
+
+    /// Generates a node for a passed predicate. It can be optionally negated
+    Node GetPredicate(u64 pred, bool negated = false);
+
+    template <typename... T>
+    inline Node Operation(OperationCode code, const T*... operands) {
+        return StoreNode(OperationNode(code, operands...));
+    }
+
+    template <typename... T>
+    inline Node Operation(OperationCode code, Meta&& meta, const T*... operands) {
+        return StoreNode(OperationNode(code, std::move(meta), operands...));
+    }
+
+    template <typename... T>
+    inline Node Operation(OperationCode code, std::vector<Node>&& operands) {
+        return StoreNode(OperationNode(code, std::move(operands)));
+    }
+
+    template <typename... T>
+    inline Node Operation(OperationCode code, Meta&& meta, std::vector<Node>&& operands) {
+        return StoreNode(OperationNode(code, std::move(meta), std::move(operands)));
+    }
+
+    template <typename... T>
+    inline Node SignedOperation(OperationCode code, bool is_signed, const T*... operands) {
+        return StoreNode(OperationNode(SignedToUnsignedCode(code, is_signed), operands...));
+    }
+
+    template <typename... T>
+    inline Node SignedOperation(OperationCode code, bool is_signed, Meta&& meta,
+                                const T*... operands) {
+        return StoreNode(
+            OperationNode(SignedToUnsignedCode(code, is_signed), std::move(meta), operands...));
+    }
+
+    static OperationCode SignedToUnsignedCode(OperationCode operation_code, bool is_signed);
+
+    const ProgramCode& program_code;
+    const u32 main_offset;
+
+    u32 coverage_begin{};
+    u32 coverage_end{};
+    std::map<std::pair<u32, u32>, ExitMethod> exit_method_map;
+
+    std::map<u32, BasicBlock> basic_blocks;
+
+    std::vector<std::unique_ptr<NodeData>> stored_nodes;
+
+    std::set<u32> used_registers;
+    std::set<Tegra::Shader::Pred> used_predicates;
+    std::map<Tegra::Shader::Attribute::Index, std::set<Tegra::Shader::IpaMode>>
+        used_input_attributes;
+    std::set<Tegra::Shader::Attribute::Index> used_output_attributes;
+    std::map<u32, ConstBuffer> used_cbufs;
+    std::set<Sampler> used_samplers;
+    std::array<bool, Tegra::Engines::Maxwell3D::Regs::NumClipDistances> used_clip_distances{};
+
+    Tegra::Shader::Header header;
+};
+
+} // namespace VideoCommon::Shader
\ No newline at end of file