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-rw-r--r--CMakeModules/GenerateSCMRev.cmake2
-rw-r--r--src/common/CMakeLists.txt2
-rw-r--r--src/video_core/CMakeLists.txt2
-rw-r--r--src/video_core/engines/shader_bytecode.h16
-rw-r--r--src/video_core/renderer_opengl/gl_shader_cache.cpp22
-rw-r--r--src/video_core/renderer_opengl/gl_shader_decompiler.cpp19
-rw-r--r--src/video_core/renderer_opengl/gl_shader_gen.cpp8
-rw-r--r--src/video_core/renderer_opengl/gl_shader_gen.h2
-rw-r--r--src/video_core/renderer_vulkan/vk_shader_decompiler.cpp9
-rw-r--r--src/video_core/shader/control_flow.cpp476
-rw-r--r--src/video_core/shader/control_flow.h63
-rw-r--r--src/video_core/shader/decode.cpp177
-rw-r--r--src/video_core/shader/decode/other.cpp58
-rw-r--r--src/video_core/shader/node.h11
-rw-r--r--src/video_core/shader/shader_ir.cpp4
-rw-r--r--src/video_core/shader/shader_ir.h27
16 files changed, 776 insertions, 122 deletions
diff --git a/CMakeModules/GenerateSCMRev.cmake b/CMakeModules/GenerateSCMRev.cmake
index dd65cfe42..abdc74428 100644
--- a/CMakeModules/GenerateSCMRev.cmake
+++ b/CMakeModules/GenerateSCMRev.cmake
@@ -82,6 +82,8 @@ set(HASH_FILES
"${VIDEO_CORE}/shader/decode/shift.cpp"
"${VIDEO_CORE}/shader/decode/video.cpp"
"${VIDEO_CORE}/shader/decode/xmad.cpp"
+ "${VIDEO_CORE}/shader/control_flow.cpp"
+ "${VIDEO_CORE}/shader/control_flow.h"
"${VIDEO_CORE}/shader/decode.cpp"
"${VIDEO_CORE}/shader/node.h"
"${VIDEO_CORE}/shader/node_helper.cpp"
diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt
index 2554add28..2b4266f29 100644
--- a/src/common/CMakeLists.txt
+++ b/src/common/CMakeLists.txt
@@ -56,6 +56,8 @@ add_custom_command(OUTPUT scm_rev.cpp
"${VIDEO_CORE}/shader/decode/shift.cpp"
"${VIDEO_CORE}/shader/decode/video.cpp"
"${VIDEO_CORE}/shader/decode/xmad.cpp"
+ "${VIDEO_CORE}/shader/control_flow.cpp"
+ "${VIDEO_CORE}/shader/control_flow.h"
"${VIDEO_CORE}/shader/decode.cpp"
"${VIDEO_CORE}/shader/node.h"
"${VIDEO_CORE}/shader/node_helper.cpp"
diff --git a/src/video_core/CMakeLists.txt b/src/video_core/CMakeLists.txt
index 6839abe71..cd32c65d3 100644
--- a/src/video_core/CMakeLists.txt
+++ b/src/video_core/CMakeLists.txt
@@ -103,6 +103,8 @@ add_library(video_core STATIC
shader/decode/video.cpp
shader/decode/xmad.cpp
shader/decode/other.cpp
+ shader/control_flow.cpp
+ shader/control_flow.h
shader/decode.cpp
shader/node_helper.cpp
shader/node_helper.h
diff --git a/src/video_core/engines/shader_bytecode.h b/src/video_core/engines/shader_bytecode.h
index 404d4f5aa..c3055602b 100644
--- a/src/video_core/engines/shader_bytecode.h
+++ b/src/video_core/engines/shader_bytecode.h
@@ -1368,6 +1368,20 @@ union Instruction {
} bra;
union {
+ BitField<20, 24, u64> target;
+ BitField<5, 1, u64> constant_buffer;
+
+ s32 GetBranchExtend() const {
+ // Sign extend the branch target offset
+ u32 mask = 1U << (24 - 1);
+ u32 value = static_cast<u32>(target);
+ // The branch offset is relative to the next instruction and is stored in bytes, so
+ // divide it by the size of an instruction and add 1 to it.
+ return static_cast<s32>((value ^ mask) - mask) / sizeof(Instruction) + 1;
+ }
+ } brx;
+
+ union {
BitField<39, 1, u64> emit; // EmitVertex
BitField<40, 1, u64> cut; // EndPrimitive
} out;
@@ -1464,6 +1478,7 @@ public:
BFE_IMM,
BFI_IMM_R,
BRA,
+ BRX,
PBK,
LD_A,
LD_L,
@@ -1738,6 +1753,7 @@ private:
INST("111000101001----", Id::SSY, Type::Flow, "SSY"),
INST("111000101010----", Id::PBK, Type::Flow, "PBK"),
INST("111000100100----", Id::BRA, Type::Flow, "BRA"),
+ INST("111000100101----", Id::BRX, Type::Flow, "BRX"),
INST("1111000011111---", Id::SYNC, Type::Flow, "SYNC"),
INST("111000110100---", Id::BRK, Type::Flow, "BRK"),
INST("111000110000----", Id::EXIT, Type::Flow, "EXIT"),
diff --git a/src/video_core/renderer_opengl/gl_shader_cache.cpp b/src/video_core/renderer_opengl/gl_shader_cache.cpp
index f9b2b03a0..5d76ee12d 100644
--- a/src/video_core/renderer_opengl/gl_shader_cache.cpp
+++ b/src/video_core/renderer_opengl/gl_shader_cache.cpp
@@ -129,9 +129,11 @@ std::size_t CalculateProgramSize(const GLShader::ProgramCode& program) {
/// Hashes one (or two) program streams
u64 GetUniqueIdentifier(Maxwell::ShaderProgram program_type, const ProgramCode& code,
- const ProgramCode& code_b) {
- u64 unique_identifier =
- Common::CityHash64(reinterpret_cast<const char*>(code.data()), CalculateProgramSize(code));
+ const ProgramCode& code_b, std::size_t size_a = 0, std::size_t size_b = 0) {
+ if (size_a == 0) {
+ size_a = CalculateProgramSize(code);
+ }
+ u64 unique_identifier = Common::CityHash64(reinterpret_cast<const char*>(code.data()), size_a);
if (program_type != Maxwell::ShaderProgram::VertexA) {
return unique_identifier;
}
@@ -140,8 +142,11 @@ u64 GetUniqueIdentifier(Maxwell::ShaderProgram program_type, const ProgramCode&
std::size_t seed = 0;
boost::hash_combine(seed, unique_identifier);
- const u64 identifier_b = Common::CityHash64(reinterpret_cast<const char*>(code_b.data()),
- CalculateProgramSize(code_b));
+ if (size_b == 0) {
+ size_b = CalculateProgramSize(code_b);
+ }
+ const u64 identifier_b =
+ Common::CityHash64(reinterpret_cast<const char*>(code_b.data()), size_b);
boost::hash_combine(seed, identifier_b);
return static_cast<u64>(seed);
}
@@ -150,14 +155,17 @@ u64 GetUniqueIdentifier(Maxwell::ShaderProgram program_type, const ProgramCode&
GLShader::ProgramResult CreateProgram(const Device& device, Maxwell::ShaderProgram program_type,
ProgramCode program_code, ProgramCode program_code_b) {
GLShader::ShaderSetup setup(program_code);
+ setup.program.size_a = CalculateProgramSize(program_code);
+ setup.program.size_b = 0;
if (program_type == Maxwell::ShaderProgram::VertexA) {
// VertexB is always enabled, so when VertexA is enabled, we have two vertex shaders.
// Conventional HW does not support this, so we combine VertexA and VertexB into one
// stage here.
setup.SetProgramB(program_code_b);
+ setup.program.size_b = CalculateProgramSize(program_code_b);
}
- setup.program.unique_identifier =
- GetUniqueIdentifier(program_type, program_code, program_code_b);
+ setup.program.unique_identifier = GetUniqueIdentifier(
+ program_type, program_code, program_code_b, setup.program.size_a, setup.program.size_b);
switch (program_type) {
case Maxwell::ShaderProgram::VertexA:
diff --git a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
index 5f2f1510c..bfc975a04 100644
--- a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
+++ b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
@@ -191,10 +191,12 @@ public:
// TODO(Subv): Figure out the actual depth of the flow stack, for now it seems
// unlikely that shaders will use 20 nested SSYs and PBKs.
- constexpr u32 FLOW_STACK_SIZE = 20;
- for (const auto stack : std::array{MetaStackClass::Ssy, MetaStackClass::Pbk}) {
- code.AddLine("uint {}[{}];", FlowStackName(stack), FLOW_STACK_SIZE);
- code.AddLine("uint {} = 0u;", FlowStackTopName(stack));
+ if (!ir.IsFlowStackDisabled()) {
+ constexpr u32 FLOW_STACK_SIZE = 20;
+ for (const auto stack : std::array{MetaStackClass::Ssy, MetaStackClass::Pbk}) {
+ code.AddLine("uint {}[{}];", FlowStackName(stack), FLOW_STACK_SIZE);
+ code.AddLine("uint {} = 0u;", FlowStackTopName(stack));
+ }
}
code.AddLine("while (true) {{");
@@ -1555,6 +1557,14 @@ private:
return {};
}
+ std::string BranchIndirect(Operation operation) {
+ const std::string op_a = VisitOperand(operation, 0, Type::Uint);
+
+ code.AddLine("jmp_to = {};", op_a);
+ code.AddLine("break;");
+ return {};
+ }
+
std::string PushFlowStack(Operation operation) {
const auto stack = std::get<MetaStackClass>(operation.GetMeta());
const auto target = std::get_if<ImmediateNode>(&*operation[0]);
@@ -1789,6 +1799,7 @@ private:
&GLSLDecompiler::ImageStore,
&GLSLDecompiler::Branch,
+ &GLSLDecompiler::BranchIndirect,
&GLSLDecompiler::PushFlowStack,
&GLSLDecompiler::PopFlowStack,
&GLSLDecompiler::Exit,
diff --git a/src/video_core/renderer_opengl/gl_shader_gen.cpp b/src/video_core/renderer_opengl/gl_shader_gen.cpp
index 9148629ec..f9ee8429e 100644
--- a/src/video_core/renderer_opengl/gl_shader_gen.cpp
+++ b/src/video_core/renderer_opengl/gl_shader_gen.cpp
@@ -29,14 +29,14 @@ layout (std140, binding = EMULATION_UBO_BINDING) uniform vs_config {
};
)";
- const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET);
+ const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET, setup.program.size_a);
ProgramResult program =
Decompile(device, program_ir, Maxwell3D::Regs::ShaderStage::Vertex, "vertex");
out += program.first;
if (setup.IsDualProgram()) {
- const ShaderIR program_ir_b(setup.program.code_b, PROGRAM_OFFSET);
+ const ShaderIR program_ir_b(setup.program.code_b, PROGRAM_OFFSET, setup.program.size_b);
ProgramResult program_b =
Decompile(device, program_ir_b, Maxwell3D::Regs::ShaderStage::Vertex, "vertex_b");
@@ -80,7 +80,7 @@ layout (std140, binding = EMULATION_UBO_BINDING) uniform gs_config {
};
)";
- const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET);
+ const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET, setup.program.size_a);
ProgramResult program =
Decompile(device, program_ir, Maxwell3D::Regs::ShaderStage::Geometry, "geometry");
out += program.first;
@@ -115,7 +115,7 @@ layout (std140, binding = EMULATION_UBO_BINDING) uniform fs_config {
};
)";
- const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET);
+ const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET, setup.program.size_a);
ProgramResult program =
Decompile(device, program_ir, Maxwell3D::Regs::ShaderStage::Fragment, "fragment");
diff --git a/src/video_core/renderer_opengl/gl_shader_gen.h b/src/video_core/renderer_opengl/gl_shader_gen.h
index 0536c8a03..7cbc590f8 100644
--- a/src/video_core/renderer_opengl/gl_shader_gen.h
+++ b/src/video_core/renderer_opengl/gl_shader_gen.h
@@ -27,6 +27,8 @@ struct ShaderSetup {
ProgramCode code;
ProgramCode code_b; // Used for dual vertex shaders
u64 unique_identifier;
+ std::size_t size_a;
+ std::size_t size_b;
} program;
/// Used in scenarios where we have a dual vertex shaders
diff --git a/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp b/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp
index 97ce214b1..1bb04607b 100644
--- a/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp
+++ b/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp
@@ -949,6 +949,14 @@ private:
return {};
}
+ Id BranchIndirect(Operation operation) {
+ const Id op_a = VisitOperand<Type::Uint>(operation, 0);
+
+ Emit(OpStore(jmp_to, op_a));
+ BranchingOp([&]() { Emit(OpBranch(continue_label)); });
+ return {};
+ }
+
Id PushFlowStack(Operation operation) {
const auto target = std::get_if<ImmediateNode>(&*operation[0]);
ASSERT(target);
@@ -1334,6 +1342,7 @@ private:
&SPIRVDecompiler::ImageStore,
&SPIRVDecompiler::Branch,
+ &SPIRVDecompiler::BranchIndirect,
&SPIRVDecompiler::PushFlowStack,
&SPIRVDecompiler::PopFlowStack,
&SPIRVDecompiler::Exit,
diff --git a/src/video_core/shader/control_flow.cpp b/src/video_core/shader/control_flow.cpp
new file mode 100644
index 000000000..fdcc970ff
--- /dev/null
+++ b/src/video_core/shader/control_flow.cpp
@@ -0,0 +1,476 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <list>
+#include <map>
+#include <stack>
+#include <unordered_map>
+#include <unordered_set>
+#include <vector>
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/shader/control_flow.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+constexpr s32 unassigned_branch = -2;
+
+struct Query {
+ u32 address{};
+ std::stack<u32> ssy_stack{};
+ std::stack<u32> pbk_stack{};
+};
+
+struct BlockStack {
+ BlockStack() = default;
+ BlockStack(const BlockStack& b) = default;
+ BlockStack(const Query& q) : ssy_stack{q.ssy_stack}, pbk_stack{q.pbk_stack} {}
+ std::stack<u32> ssy_stack{};
+ std::stack<u32> pbk_stack{};
+};
+
+struct BlockBranchInfo {
+ Condition condition{};
+ s32 address{exit_branch};
+ bool kill{};
+ bool is_sync{};
+ bool is_brk{};
+ bool ignore{};
+};
+
+struct BlockInfo {
+ u32 start{};
+ u32 end{};
+ bool visited{};
+ BlockBranchInfo branch{};
+
+ bool IsInside(const u32 address) const {
+ return start <= address && address <= end;
+ }
+};
+
+struct CFGRebuildState {
+ explicit CFGRebuildState(const ProgramCode& program_code, const std::size_t program_size,
+ const u32 start)
+ : program_code{program_code}, program_size{program_size}, start{start} {}
+
+ u32 start{};
+ std::vector<BlockInfo> block_info{};
+ std::list<u32> inspect_queries{};
+ std::list<Query> queries{};
+ std::unordered_map<u32, u32> registered{};
+ std::unordered_set<u32> labels{};
+ std::map<u32, u32> ssy_labels{};
+ std::map<u32, u32> pbk_labels{};
+ std::unordered_map<u32, BlockStack> stacks{};
+ const ProgramCode& program_code;
+ const std::size_t program_size;
+};
+
+enum class BlockCollision : u32 { None, Found, Inside };
+
+std::pair<BlockCollision, u32> TryGetBlock(CFGRebuildState& state, u32 address) {
+ const auto& blocks = state.block_info;
+ for (u32 index = 0; index < blocks.size(); index++) {
+ if (blocks[index].start == address) {
+ return {BlockCollision::Found, index};
+ }
+ if (blocks[index].IsInside(address)) {
+ return {BlockCollision::Inside, index};
+ }
+ }
+ return {BlockCollision::None, -1};
+}
+
+struct ParseInfo {
+ BlockBranchInfo branch_info{};
+ u32 end_address{};
+};
+
+BlockInfo& CreateBlockInfo(CFGRebuildState& state, u32 start, u32 end) {
+ auto& it = state.block_info.emplace_back();
+ it.start = start;
+ it.end = end;
+ const u32 index = static_cast<u32>(state.block_info.size() - 1);
+ state.registered.insert({start, index});
+ return it;
+}
+
+Pred GetPredicate(u32 index, bool negated) {
+ return static_cast<Pred>(index + (negated ? 8 : 0));
+}
+
+/**
+ * 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;
+}
+
+enum class ParseResult : u32 {
+ ControlCaught,
+ BlockEnd,
+ AbnormalFlow,
+};
+
+std::pair<ParseResult, ParseInfo> ParseCode(CFGRebuildState& state, u32 address) {
+ u32 offset = static_cast<u32>(address);
+ const u32 end_address = static_cast<u32>(state.program_size / sizeof(Instruction));
+ ParseInfo parse_info{};
+
+ const auto insert_label = [](CFGRebuildState& state, u32 address) {
+ const auto pair = state.labels.emplace(address);
+ if (pair.second) {
+ state.inspect_queries.push_back(address);
+ }
+ };
+
+ while (true) {
+ if (offset >= end_address) {
+ // ASSERT_OR_EXECUTE can't be used, as it ignores the break
+ ASSERT_MSG(false, "Shader passed the current limit!");
+ parse_info.branch_info.address = exit_branch;
+ parse_info.branch_info.ignore = false;
+ break;
+ }
+ if (state.registered.count(offset) != 0) {
+ parse_info.branch_info.address = offset;
+ parse_info.branch_info.ignore = true;
+ break;
+ }
+ if (IsSchedInstruction(offset, state.start)) {
+ offset++;
+ continue;
+ }
+ const Instruction instr = {state.program_code[offset]};
+ const auto opcode = OpCode::Decode(instr);
+ if (!opcode || opcode->get().GetType() != OpCode::Type::Flow) {
+ offset++;
+ continue;
+ }
+
+ switch (opcode->get().GetId()) {
+ case OpCode::Id::EXIT: {
+ const auto pred_index = static_cast<u32>(instr.pred.pred_index);
+ parse_info.branch_info.condition.predicate =
+ GetPredicate(pred_index, instr.negate_pred != 0);
+ if (parse_info.branch_info.condition.predicate == Pred::NeverExecute) {
+ offset++;
+ continue;
+ }
+ const ConditionCode cc = instr.flow_condition_code;
+ parse_info.branch_info.condition.cc = cc;
+ if (cc == ConditionCode::F) {
+ offset++;
+ continue;
+ }
+ parse_info.branch_info.address = exit_branch;
+ parse_info.branch_info.kill = false;
+ parse_info.branch_info.is_sync = false;
+ parse_info.branch_info.is_brk = false;
+ parse_info.branch_info.ignore = false;
+ parse_info.end_address = offset;
+
+ return {ParseResult::ControlCaught, parse_info};
+ }
+ case OpCode::Id::BRA: {
+ if (instr.bra.constant_buffer != 0) {
+ return {ParseResult::AbnormalFlow, parse_info};
+ }
+ const auto pred_index = static_cast<u32>(instr.pred.pred_index);
+ parse_info.branch_info.condition.predicate =
+ GetPredicate(pred_index, instr.negate_pred != 0);
+ if (parse_info.branch_info.condition.predicate == Pred::NeverExecute) {
+ offset++;
+ continue;
+ }
+ const ConditionCode cc = instr.flow_condition_code;
+ parse_info.branch_info.condition.cc = cc;
+ if (cc == ConditionCode::F) {
+ offset++;
+ continue;
+ }
+ const u32 branch_offset = offset + instr.bra.GetBranchTarget();
+ if (branch_offset == 0) {
+ parse_info.branch_info.address = exit_branch;
+ } else {
+ parse_info.branch_info.address = branch_offset;
+ }
+ insert_label(state, branch_offset);
+ parse_info.branch_info.kill = false;
+ parse_info.branch_info.is_sync = false;
+ parse_info.branch_info.is_brk = false;
+ parse_info.branch_info.ignore = false;
+ parse_info.end_address = offset;
+
+ return {ParseResult::ControlCaught, parse_info};
+ }
+ case OpCode::Id::SYNC: {
+ const auto pred_index = static_cast<u32>(instr.pred.pred_index);
+ parse_info.branch_info.condition.predicate =
+ GetPredicate(pred_index, instr.negate_pred != 0);
+ if (parse_info.branch_info.condition.predicate == Pred::NeverExecute) {
+ offset++;
+ continue;
+ }
+ const ConditionCode cc = instr.flow_condition_code;
+ parse_info.branch_info.condition.cc = cc;
+ if (cc == ConditionCode::F) {
+ offset++;
+ continue;
+ }
+ parse_info.branch_info.address = unassigned_branch;
+ parse_info.branch_info.kill = false;
+ parse_info.branch_info.is_sync = true;
+ parse_info.branch_info.is_brk = false;
+ parse_info.branch_info.ignore = false;
+ parse_info.end_address = offset;
+
+ return {ParseResult::ControlCaught, parse_info};
+ }
+ case OpCode::Id::BRK: {
+ const auto pred_index = static_cast<u32>(instr.pred.pred_index);
+ parse_info.branch_info.condition.predicate =
+ GetPredicate(pred_index, instr.negate_pred != 0);
+ if (parse_info.branch_info.condition.predicate == Pred::NeverExecute) {
+ offset++;
+ continue;
+ }
+ const ConditionCode cc = instr.flow_condition_code;
+ parse_info.branch_info.condition.cc = cc;
+ if (cc == ConditionCode::F) {
+ offset++;
+ continue;
+ }
+ parse_info.branch_info.address = unassigned_branch;
+ parse_info.branch_info.kill = false;
+ parse_info.branch_info.is_sync = false;
+ parse_info.branch_info.is_brk = true;
+ parse_info.branch_info.ignore = false;
+ parse_info.end_address = offset;
+
+ return {ParseResult::ControlCaught, parse_info};
+ }
+ case OpCode::Id::KIL: {
+ const auto pred_index = static_cast<u32>(instr.pred.pred_index);
+ parse_info.branch_info.condition.predicate =
+ GetPredicate(pred_index, instr.negate_pred != 0);
+ if (parse_info.branch_info.condition.predicate == Pred::NeverExecute) {
+ offset++;
+ continue;
+ }
+ const ConditionCode cc = instr.flow_condition_code;
+ parse_info.branch_info.condition.cc = cc;
+ if (cc == ConditionCode::F) {
+ offset++;
+ continue;
+ }
+ parse_info.branch_info.address = exit_branch;
+ parse_info.branch_info.kill = true;
+ parse_info.branch_info.is_sync = false;
+ parse_info.branch_info.is_brk = false;
+ parse_info.branch_info.ignore = false;
+ parse_info.end_address = offset;
+
+ return {ParseResult::ControlCaught, parse_info};
+ }
+ case OpCode::Id::SSY: {
+ const u32 target = offset + instr.bra.GetBranchTarget();
+ insert_label(state, target);
+ state.ssy_labels.emplace(offset, target);
+ break;
+ }
+ case OpCode::Id::PBK: {
+ const u32 target = offset + instr.bra.GetBranchTarget();
+ insert_label(state, target);
+ state.pbk_labels.emplace(offset, target);
+ break;
+ }
+ case OpCode::Id::BRX: {
+ return {ParseResult::AbnormalFlow, parse_info};
+ }
+ default:
+ break;
+ }
+
+ offset++;
+ }
+ parse_info.branch_info.kill = false;
+ parse_info.branch_info.is_sync = false;
+ parse_info.branch_info.is_brk = false;
+ parse_info.end_address = offset - 1;
+ return {ParseResult::BlockEnd, parse_info};
+}
+
+bool TryInspectAddress(CFGRebuildState& state) {
+ if (state.inspect_queries.empty()) {
+ return false;
+ }
+
+ const u32 address = state.inspect_queries.front();
+ state.inspect_queries.pop_front();
+ const auto [result, block_index] = TryGetBlock(state, address);
+ switch (result) {
+ case BlockCollision::Found: {
+ return true;
+ }
+ case BlockCollision::Inside: {
+ // This case is the tricky one:
+ // We need to Split the block in 2 sepparate blocks
+ const u32 end = state.block_info[block_index].end;
+ BlockInfo& new_block = CreateBlockInfo(state, address, end);
+ BlockInfo& current_block = state.block_info[block_index];
+ current_block.end = address - 1;
+ new_block.branch = current_block.branch;
+ BlockBranchInfo forward_branch{};
+ forward_branch.address = address;
+ forward_branch.ignore = true;
+ current_block.branch = forward_branch;
+ return true;
+ }
+ default:
+ break;
+ }
+ const auto [parse_result, parse_info] = ParseCode(state, address);
+ if (parse_result == ParseResult::AbnormalFlow) {
+ // if it's AbnormalFlow, we end it as false, ending the CFG reconstruction
+ return false;
+ }
+
+ BlockInfo& block_info = CreateBlockInfo(state, address, parse_info.end_address);
+ block_info.branch = parse_info.branch_info;
+ if (parse_info.branch_info.condition.IsUnconditional()) {
+ return true;
+ }
+
+ const u32 fallthrough_address = parse_info.end_address + 1;
+ state.inspect_queries.push_front(fallthrough_address);
+ return true;
+}
+
+bool TryQuery(CFGRebuildState& state) {
+ const auto gather_labels = [](std::stack<u32>& cc, std::map<u32, u32>& labels,
+ BlockInfo& block) {
+ auto gather_start = labels.lower_bound(block.start);
+ const auto gather_end = labels.upper_bound(block.end);
+ while (gather_start != gather_end) {
+ cc.push(gather_start->second);
+ gather_start++;
+ }
+ };
+ if (state.queries.empty()) {
+ return false;
+ }
+ Query& q = state.queries.front();
+ const u32 block_index = state.registered[q.address];
+ BlockInfo& block = state.block_info[block_index];
+ // If the block is visted, check if the stacks match, else gather the ssy/pbk
+ // labels into the current stack and look if the branch at the end of the block
+ // consumes a label. Schedule new queries accordingly
+ if (block.visited) {
+ BlockStack& stack = state.stacks[q.address];
+ const bool all_okay = (stack.ssy_stack.size() == 0 || q.ssy_stack == stack.ssy_stack) &&
+ (stack.pbk_stack.size() == 0 || q.pbk_stack == stack.pbk_stack);
+ state.queries.pop_front();
+ return all_okay;
+ }
+ block.visited = true;
+ state.stacks[q.address] = BlockStack{q};
+ Query q2(q);
+ state.queries.pop_front();
+ gather_labels(q2.ssy_stack, state.ssy_labels, block);
+ gather_labels(q2.pbk_stack, state.pbk_labels, block);
+ if (!block.branch.condition.IsUnconditional()) {
+ q2.address = block.end + 1;
+ state.queries.push_back(q2);
+ }
+ Query conditional_query{q2};
+ if (block.branch.is_sync) {
+ if (block.branch.address == unassigned_branch) {
+ block.branch.address = conditional_query.ssy_stack.top();
+ }
+ conditional_query.ssy_stack.pop();
+ }
+ if (block.branch.is_brk) {
+ if (block.branch.address == unassigned_branch) {
+ block.branch.address = conditional_query.pbk_stack.top();
+ }
+ conditional_query.pbk_stack.pop();
+ }
+ conditional_query.address = block.branch.address;
+ state.queries.push_back(conditional_query);
+ return true;
+}
+
+std::optional<ShaderCharacteristics> ScanFlow(const ProgramCode& program_code, u32 program_size,
+ u32 start_address) {
+ CFGRebuildState state{program_code, program_size, start_address};
+ // Inspect Code and generate blocks
+ state.labels.clear();
+ state.labels.emplace(start_address);
+ state.inspect_queries.push_back(state.start);
+ while (!state.inspect_queries.empty()) {
+ if (!TryInspectAddress(state)) {
+ return {};
+ }
+ }
+ // Decompile Stacks
+ Query start_query{};
+ start_query.address = state.start;
+ state.queries.push_back(start_query);
+ bool decompiled = true;
+ while (!state.queries.empty()) {
+ if (!TryQuery(state)) {
+ decompiled = false;
+ break;
+ }
+ }
+ // Sort and organize results
+ std::sort(state.block_info.begin(), state.block_info.end(),
+ [](const BlockInfo& a, const BlockInfo& b) -> bool { return a.start < b.start; });
+ ShaderCharacteristics result_out{};
+ result_out.decompilable = decompiled;
+ result_out.start = start_address;
+ result_out.end = start_address;
+ for (auto& block : state.block_info) {
+ ShaderBlock new_block{};
+ new_block.start = block.start;
+ new_block.end = block.end;
+ new_block.ignore_branch = block.branch.ignore;
+ if (!new_block.ignore_branch) {
+ new_block.branch.cond = block.branch.condition;
+ new_block.branch.kills = block.branch.kill;
+ new_block.branch.address = block.branch.address;
+ }
+ result_out.end = std::max(result_out.end, block.end);
+ result_out.blocks.push_back(new_block);
+ }
+ if (result_out.decompilable) {
+ result_out.labels = std::move(state.labels);
+ return {result_out};
+ }
+ // If it's not decompilable, merge the unlabelled blocks together
+ auto back = result_out.blocks.begin();
+ auto next = std::next(back);
+ while (next != result_out.blocks.end()) {
+ if (state.labels.count(next->start) == 0 && next->start == back->end + 1) {
+ back->end = next->end;
+ next = result_out.blocks.erase(next);
+ continue;
+ }
+ back = next;
+ next++;
+ }
+ return {result_out};
+}
+} // namespace VideoCommon::Shader
diff --git a/src/video_core/shader/control_flow.h b/src/video_core/shader/control_flow.h
new file mode 100644
index 000000000..5e8ea3271
--- /dev/null
+++ b/src/video_core/shader/control_flow.h
@@ -0,0 +1,63 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <cstring>
+#include <list>
+#include <optional>
+#include <unordered_set>
+
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::ConditionCode;
+using Tegra::Shader::Pred;
+
+constexpr s32 exit_branch = -1;
+
+struct Condition {
+ Pred predicate{Pred::UnusedIndex};
+ ConditionCode cc{ConditionCode::T};
+
+ bool IsUnconditional() const {
+ return predicate == Pred::UnusedIndex && cc == ConditionCode::T;
+ }
+ bool operator==(const Condition& other) const {
+ return std::tie(predicate, cc) == std::tie(other.predicate, other.cc);
+ }
+};
+
+struct ShaderBlock {
+ u32 start{};
+ u32 end{};
+ bool ignore_branch{};
+ struct Branch {
+ Condition cond{};
+ bool kills{};
+ s32 address{};
+ bool operator==(const Branch& b) const {
+ return std::tie(cond, kills, address) == std::tie(b.cond, b.kills, b.address);
+ }
+ } branch{};
+ bool operator==(const ShaderBlock& sb) const {
+ return std::tie(start, end, ignore_branch, branch) ==
+ std::tie(sb.start, sb.end, sb.ignore_branch, sb.branch);
+ }
+};
+
+struct ShaderCharacteristics {
+ std::list<ShaderBlock> blocks{};
+ bool decompilable{};
+ u32 start{};
+ u32 end{};
+ std::unordered_set<u32> labels{};
+};
+
+std::optional<ShaderCharacteristics> ScanFlow(const ProgramCode& program_code, u32 program_size,
+ u32 start_address);
+
+} // namespace VideoCommon::Shader
diff --git a/src/video_core/shader/decode.cpp b/src/video_core/shader/decode.cpp
index 2c9ff28f2..29c8895c5 100644
--- a/src/video_core/shader/decode.cpp
+++ b/src/video_core/shader/decode.cpp
@@ -11,6 +11,7 @@
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/engines/shader_header.h"
+#include "video_core/shader/control_flow.h"
#include "video_core/shader/node_helper.h"
#include "video_core/shader/shader_ir.h"
@@ -21,20 +22,6 @@ using Tegra::Shader::OpCode;
namespace {
-/// 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.
@@ -51,85 +38,104 @@ constexpr bool IsSchedInstruction(u32 offset, u32 main_offset) {
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)});
+ disable_flow_stack = false;
+ const auto info = ScanFlow(program_code, program_size, main_offset);
+ if (info) {
+ const auto& shader_info = *info;
+ coverage_begin = shader_info.start;
+ coverage_end = shader_info.end;
+ if (shader_info.decompilable) {
+ disable_flow_stack = true;
+ const auto insert_block = ([this](NodeBlock& nodes, u32 label) {
+ if (label == exit_branch) {
+ return;
+ }
+ basic_blocks.insert({label, nodes});
+ });
+ const auto& blocks = shader_info.blocks;
+ NodeBlock current_block;
+ u32 current_label = exit_branch;
+ for (auto& block : blocks) {
+ if (shader_info.labels.count(block.start) != 0) {
+ insert_block(current_block, current_label);
+ current_block.clear();
+ current_label = block.start;
+ }
+ if (!block.ignore_branch) {
+ DecodeRangeInner(current_block, block.start, block.end);
+ InsertControlFlow(current_block, block);
+ } else {
+ DecodeRangeInner(current_block, block.start, block.end + 1);
+ }
+ }
+ insert_block(current_block, current_label);
+ return;
+ }
+ LOG_WARNING(HW_GPU, "Flow Stack Removing Failed! Falling back to old method");
+ // we can't decompile it, fallback to standard method
+ for (const auto& block : shader_info.blocks) {
+ basic_blocks.insert({block.start, DecodeRange(block.start, block.end + 1)});
+ }
return;
}
+ LOG_WARNING(HW_GPU, "Flow Analysis Failed! Falling back to brute force compiling");
+
+ // Now we need to deal with an undecompilable shader. We need to brute force
+ // a shader that captures every position.
+ coverage_begin = main_offset;
+ const u32 shader_end = static_cast<u32>(program_size / sizeof(u64));
+ coverage_end = shader_end;
+ for (u32 label = main_offset; label < shader_end; label++) {
+ basic_blocks.insert({label, DecodeRange(label, label + 1)});
+ }
+}
- 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;
+NodeBlock ShaderIR::DecodeRange(u32 begin, u32 end) {
+ NodeBlock basic_block;
+ DecodeRangeInner(basic_block, begin, end);
+ return basic_block;
+}
- basic_blocks.insert({label, DecodeRange(label, next_label)});
+void ShaderIR::DecodeRangeInner(NodeBlock& bb, u32 begin, u32 end) {
+ for (u32 pc = begin; pc < (begin > end ? MAX_PROGRAM_LENGTH : end);) {
+ pc = DecodeInstr(bb, pc);
}
}
-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);
- }
+void ShaderIR::InsertControlFlow(NodeBlock& bb, const ShaderBlock& block) {
+ const auto apply_conditions = ([&](const Condition& cond, Node n) -> Node {
+ Node result = n;
+ if (cond.cc != ConditionCode::T) {
+ result = Conditional(GetConditionCode(cond.cc), {result});
}
- 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;
+ if (cond.predicate != Pred::UnusedIndex) {
+ u32 pred = static_cast<u32>(cond.predicate);
+ const bool is_neg = pred > 7;
+ if (is_neg) {
+ pred -= 8;
+ }
+ result = Conditional(GetPredicate(pred, is_neg), {result});
}
- default:
- break;
+ return result;
+ });
+ if (block.branch.address < 0) {
+ if (block.branch.kills) {
+ Node n = Operation(OperationCode::Discard);
+ n = apply_conditions(block.branch.cond, n);
+ bb.push_back(n);
+ global_code.push_back(n);
+ return;
}
+ Node n = Operation(OperationCode::Exit);
+ n = apply_conditions(block.branch.cond, n);
+ bb.push_back(n);
+ global_code.push_back(n);
+ return;
}
- return exit_method = ExitMethod::AlwaysReturn;
-}
-
-NodeBlock ShaderIR::DecodeRange(u32 begin, u32 end) {
- NodeBlock basic_block;
- for (u32 pc = begin; pc < (begin > end ? MAX_PROGRAM_LENGTH : end);) {
- pc = DecodeInstr(basic_block, pc);
- }
- return basic_block;
+ Node n = Operation(OperationCode::Branch, Immediate(block.branch.address));
+ n = apply_conditions(block.branch.cond, n);
+ bb.push_back(n);
+ global_code.push_back(n);
}
u32 ShaderIR::DecodeInstr(NodeBlock& bb, u32 pc) {
@@ -140,15 +146,18 @@ u32 ShaderIR::DecodeInstr(NodeBlock& bb, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
+ const u32 nv_address = ConvertAddressToNvidiaSpace(pc);
// Decoding failure
if (!opcode) {
UNIMPLEMENTED_MSG("Unhandled instruction: {0:x}", instr.value);
+ bb.push_back(Comment(fmt::format("{:05x} Unimplemented Shader instruction (0x{:016x})",
+ nv_address, instr.value)));
return pc + 1;
}
- bb.push_back(
- Comment(fmt::format("{}: {} (0x{:016x})", pc, opcode->get().GetName(), instr.value)));
+ bb.push_back(Comment(
+ fmt::format("{:05x} {} (0x{:016x})", nv_address, opcode->get().GetName(), instr.value)));
using Tegra::Shader::Pred;
UNIMPLEMENTED_IF_MSG(instr.pred.full_pred == Pred::NeverExecute,
diff --git a/src/video_core/shader/decode/other.cpp b/src/video_core/shader/decode/other.cpp
index d46a8ab82..42e3de02f 100644
--- a/src/video_core/shader/decode/other.cpp
+++ b/src/video_core/shader/decode/other.cpp
@@ -91,11 +91,46 @@ u32 ShaderIR::DecodeOther(NodeBlock& bb, u32 pc) {
break;
}
case OpCode::Id::BRA: {
- UNIMPLEMENTED_IF_MSG(instr.bra.constant_buffer != 0,
- "BRA with constant buffers are not implemented");
+ Node branch;
+ if (instr.bra.constant_buffer == 0) {
+ const u32 target = pc + instr.bra.GetBranchTarget();
+ branch = Operation(OperationCode::Branch, Immediate(target));
+ } else {
+ const u32 target = pc + 1;
+ const Node op_a = GetConstBuffer(instr.cbuf36.index, instr.cbuf36.GetOffset());
+ const Node convert = SignedOperation(OperationCode::IArithmeticShiftRight, true,
+ PRECISE, op_a, Immediate(3));
+ const Node operand =
+ Operation(OperationCode::IAdd, PRECISE, convert, Immediate(target));
+ branch = Operation(OperationCode::BranchIndirect, convert);
+ }
- const u32 target = pc + instr.bra.GetBranchTarget();
- const Node branch = Operation(OperationCode::Branch, Immediate(target));
+ const Tegra::Shader::ConditionCode cc = instr.flow_condition_code;
+ if (cc != Tegra::Shader::ConditionCode::T) {
+ bb.push_back(Conditional(GetConditionCode(cc), {branch}));
+ } else {
+ bb.push_back(branch);
+ }
+ break;
+ }
+ case OpCode::Id::BRX: {
+ Node operand;
+ if (instr.brx.constant_buffer != 0) {
+ const s32 target = pc + 1;
+ const Node index = GetRegister(instr.gpr8);
+ const Node op_a =
+ GetConstBufferIndirect(instr.cbuf36.index, instr.cbuf36.GetOffset() + 0, index);
+ const Node convert = SignedOperation(OperationCode::IArithmeticShiftRight, true,
+ PRECISE, op_a, Immediate(3));
+ operand = Operation(OperationCode::IAdd, PRECISE, convert, Immediate(target));
+ } else {
+ const s32 target = pc + instr.brx.GetBranchExtend();
+ const Node op_a = GetRegister(instr.gpr8);
+ const Node convert = SignedOperation(OperationCode::IArithmeticShiftRight, true,
+ PRECISE, op_a, Immediate(3));
+ operand = Operation(OperationCode::IAdd, PRECISE, convert, Immediate(target));
+ }
+ const Node branch = Operation(OperationCode::BranchIndirect, operand);
const Tegra::Shader::ConditionCode cc = instr.flow_condition_code;
if (cc != Tegra::Shader::ConditionCode::T) {
@@ -109,6 +144,10 @@ u32 ShaderIR::DecodeOther(NodeBlock& bb, u32 pc) {
UNIMPLEMENTED_IF_MSG(instr.bra.constant_buffer != 0,
"Constant buffer flow is not supported");
+ if (disable_flow_stack) {
+ break;
+ }
+
// The SSY opcode tells the GPU where to re-converge divergent execution paths with SYNC.
const u32 target = pc + instr.bra.GetBranchTarget();
bb.push_back(
@@ -119,6 +158,10 @@ u32 ShaderIR::DecodeOther(NodeBlock& bb, u32 pc) {
UNIMPLEMENTED_IF_MSG(instr.bra.constant_buffer != 0,
"Constant buffer PBK is not supported");
+ if (disable_flow_stack) {
+ break;
+ }
+
// PBK pushes to a stack the address where BRK will jump to.
const u32 target = pc + instr.bra.GetBranchTarget();
bb.push_back(
@@ -130,6 +173,10 @@ u32 ShaderIR::DecodeOther(NodeBlock& bb, u32 pc) {
UNIMPLEMENTED_IF_MSG(cc != Tegra::Shader::ConditionCode::T, "SYNC condition code used: {}",
static_cast<u32>(cc));
+ if (disable_flow_stack) {
+ break;
+ }
+
// The SYNC opcode jumps to the address previously set by the SSY opcode
bb.push_back(Operation(OperationCode::PopFlowStack, MetaStackClass::Ssy));
break;
@@ -138,6 +185,9 @@ u32 ShaderIR::DecodeOther(NodeBlock& bb, u32 pc) {
const Tegra::Shader::ConditionCode cc = instr.flow_condition_code;
UNIMPLEMENTED_IF_MSG(cc != Tegra::Shader::ConditionCode::T, "BRK condition code used: {}",
static_cast<u32>(cc));
+ if (disable_flow_stack) {
+ break;
+ }
// The BRK opcode jumps to the address previously set by the PBK opcode
bb.push_back(Operation(OperationCode::PopFlowStack, MetaStackClass::Pbk));
diff --git a/src/video_core/shader/node.h b/src/video_core/shader/node.h
index 0ac83fcf0..7427ed896 100644
--- a/src/video_core/shader/node.h
+++ b/src/video_core/shader/node.h
@@ -148,11 +148,12 @@ enum class OperationCode {
ImageStore, /// (MetaImage, float[N] coords) -> void
- Branch, /// (uint branch_target) -> void
- PushFlowStack, /// (uint branch_target) -> void
- PopFlowStack, /// () -> void
- Exit, /// () -> void
- Discard, /// () -> void
+ Branch, /// (uint branch_target) -> void
+ BranchIndirect, /// (uint branch_target) -> void
+ PushFlowStack, /// (uint branch_target) -> void
+ PopFlowStack, /// () -> void
+ Exit, /// () -> void
+ Discard, /// () -> void
EmitVertex, /// () -> void
EndPrimitive, /// () -> void
diff --git a/src/video_core/shader/shader_ir.cpp b/src/video_core/shader/shader_ir.cpp
index 11b545cca..5994bfc4e 100644
--- a/src/video_core/shader/shader_ir.cpp
+++ b/src/video_core/shader/shader_ir.cpp
@@ -22,8 +22,8 @@ using Tegra::Shader::PredCondition;
using Tegra::Shader::PredOperation;
using Tegra::Shader::Register;
-ShaderIR::ShaderIR(const ProgramCode& program_code, u32 main_offset)
- : program_code{program_code}, main_offset{main_offset} {
+ShaderIR::ShaderIR(const ProgramCode& program_code, u32 main_offset, const std::size_t size)
+ : program_code{program_code}, main_offset{main_offset}, program_size{size} {
Decode();
}
diff --git a/src/video_core/shader/shader_ir.h b/src/video_core/shader/shader_ir.h
index e22548208..6145f0a70 100644
--- a/src/video_core/shader/shader_ir.h
+++ b/src/video_core/shader/shader_ir.h
@@ -22,18 +22,12 @@
namespace VideoCommon::Shader {
+struct ShaderBlock;
+
using ProgramCode = std::vector<u64>;
constexpr u32 MAX_PROGRAM_LENGTH = 0x1000;
-/// 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 ConstBuffer {
public:
explicit ConstBuffer(u32 max_offset, bool is_indirect)
@@ -73,7 +67,7 @@ struct GlobalMemoryUsage {
class ShaderIR final {
public:
- explicit ShaderIR(const ProgramCode& program_code, u32 main_offset);
+ explicit ShaderIR(const ProgramCode& program_code, u32 main_offset, std::size_t size);
~ShaderIR();
const std::map<u32, NodeBlock>& GetBasicBlocks() const {
@@ -129,12 +123,20 @@ public:
return header;
}
+ bool IsFlowStackDisabled() const {
+ return disable_flow_stack;
+ }
+
+ u32 ConvertAddressToNvidiaSpace(const u32 address) const {
+ return (address - main_offset) * sizeof(Tegra::Shader::Instruction);
+ }
+
private:
void Decode();
- ExitMethod Scan(u32 begin, u32 end, std::set<u32>& labels);
-
NodeBlock DecodeRange(u32 begin, u32 end);
+ void DecodeRangeInner(NodeBlock& bb, u32 begin, u32 end);
+ void InsertControlFlow(NodeBlock& bb, const ShaderBlock& block);
/**
* Decodes a single instruction from Tegra to IR.
@@ -326,10 +328,11 @@ private:
const ProgramCode& program_code;
const u32 main_offset;
+ const std::size_t program_size;
+ bool disable_flow_stack{};
u32 coverage_begin{};
u32 coverage_end{};
- std::map<std::pair<u32, u32>, ExitMethod> exit_method_map;
std::map<u32, NodeBlock> basic_blocks;
NodeBlock global_code;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 09:27:56 +0100