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Merge pull request #1527 from FernandoS27/assert-flow

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Assert Control Flow Instructions using Control Codes
This commit is contained in:
bunnei 2018-11-01 00:34:56 -04:00 committed by GitHub
commit 9afcbba8e4
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2 changed files with 27 additions and 2 deletions
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1
src/video_core/engines/shader_bytecode.h
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@ -1235,6 +1235,7 @@ union Instruction {
BitField<60, 1, u64> is_b_gpr;
BitField<59, 1, u64> is_c_gpr;
BitField<20, 24, s64> smem_imm;
BitField<0, 5, ControlCode> flow_control_code;
Attribute attribute;
Sampler sampler;

28
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
View File

@ -3474,6 +3474,12 @@ private:
EmitFragmentOutputsWrite();
}
const Tegra::Shader::ControlCode cc = instr.flow_control_code;
if (cc != Tegra::Shader::ControlCode::T) {
LOG_CRITICAL(HW_GPU, "EXIT Control Code used: {}", static_cast<u32>(cc));
UNREACHABLE();
}
switch (instr.flow.cond) {
case Tegra::Shader::FlowCondition::Always:
shader.AddLine("return true;");
@ -3503,6 +3509,11 @@ private:
// Enclose "discard" in a conditional, so that GLSL compilation does not complain
// about unexecuted instructions that may follow this.
const Tegra::Shader::ControlCode cc = instr.flow_control_code;
if (cc != Tegra::Shader::ControlCode::T) {
LOG_CRITICAL(HW_GPU, "KIL Control Code used: {}", static_cast<u32>(cc));
UNREACHABLE();
}
shader.AddLine("if (true) {");
++shader.scope;
shader.AddLine("discard;");
@ -3560,6 +3571,11 @@ private:
case OpCode::Id::BRA: {
ASSERT_MSG(instr.bra.constant_buffer == 0,
"BRA with constant buffers are not implemented");
const Tegra::Shader::ControlCode cc = instr.flow_control_code;
if (cc != Tegra::Shader::ControlCode::T) {
LOG_CRITICAL(HW_GPU, "BRA Control Code used: {}", static_cast<u32>(cc));
UNREACHABLE();
}
const u32 target = offset + instr.bra.GetBranchTarget();
shader.AddLine("{ jmp_to = " + std::to_string(target) + "u; break; }");
break;
@ -3600,13 +3616,21 @@ private:
}
case OpCode::Id::SYNC: {
// The SYNC opcode jumps to the address previously set by the SSY opcode
ASSERT(instr.flow.cond == Tegra::Shader::FlowCondition::Always);
const Tegra::Shader::ControlCode cc = instr.flow_control_code;
if (cc != Tegra::Shader::ControlCode::T) {
LOG_CRITICAL(HW_GPU, "SYNC Control Code used: {}", static_cast<u32>(cc));
UNREACHABLE();
}
EmitPopFromFlowStack();
break;
}
case OpCode::Id::BRK: {
// The BRK opcode jumps to the address previously set by the PBK opcode
ASSERT(instr.flow.cond == Tegra::Shader::FlowCondition::Always);
const Tegra::Shader::ControlCode cc = instr.flow_control_code;
if (cc != Tegra::Shader::ControlCode::T) {
LOG_CRITICAL(HW_GPU, "BRK Control Code used: {}", static_cast<u32>(cc));
UNREACHABLE();
}
EmitPopFromFlowStack();
break;
}