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Merge pull request #376 from bunnei/shader-decoder

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Shader opcode decoding
This commit is contained in:
bunnei
2018-04-21 00:04:51 -04:00
committed by GitHub
parent f8a037ead4 d08fd7e86d
commit f8764bb5d3
2 changed files with 249 additions and 210 deletions
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55
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
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@ -97,11 +97,12 @@ private:
return exit_method;
for (u32 offset = begin; offset != end && offset != PROGRAM_END; ++offset) {
const Instruction instr = {program_code[offset]};
switch (instr.opcode.EffectiveOpCode()) {
case OpCode::Id::EXIT: {
return exit_method = ExitMethod::AlwaysEnd;
}
if (const auto opcode = OpCode::Decode({program_code[offset]})) {
switch (opcode->GetId()) {
case OpCode::Id::EXIT: {
return exit_method = ExitMethod::AlwaysEnd;
}
}
}
}
return exit_method = ExitMethod::AlwaysReturn;
@ -332,12 +333,20 @@ private:
*/
u32 CompileInstr(u32 offset) {
// Ignore sched instructions when generating code.
if (IsSchedInstruction(offset))
if (IsSchedInstruction(offset)) {
return offset + 1;
}
const Instruction instr = {program_code[offset]};
const auto opcode = OpCode::Decode(instr);
shader.AddLine("// " + std::to_string(offset) + ": " + OpCode::GetInfo(instr.opcode).name);
// Decoding failure
if (!opcode) {
NGLOG_CRITICAL(HW_GPU, "Unhandled instruction: {0:x}", instr.value);
UNREACHABLE();
}
shader.AddLine("// " + std::to_string(offset) + ": " + opcode->GetName());
using Tegra::Shader::Pred;
ASSERT_MSG(instr.pred.full_pred != Pred::NeverExecute,
@ -349,7 +358,7 @@ private:
++shader.scope;
}
switch (OpCode::GetInfo(instr.opcode).type) {
switch (opcode->GetType()) {
case OpCode::Type::Arithmetic: {
std::string dest = GetRegister(instr.gpr0);
std::string op_a = instr.alu.negate_a ? "-" : "";
@ -374,7 +383,7 @@ private:
op_b = "abs(" + op_b + ")";
}
switch (instr.opcode.EffectiveOpCode()) {
switch (opcode->GetId()) {
case OpCode::Id::FMUL_C:
case OpCode::Id::FMUL_R:
case OpCode::Id::FMUL_IMM: {
@ -416,16 +425,18 @@ private:
SetDest(0, dest, "min(" + op_a + "," + op_b + ")", 1, 1, instr.alu.abs_d);
break;
default:
NGLOG_CRITICAL(HW_GPU, "Unhandled MUFU sub op: {}",
NGLOG_CRITICAL(HW_GPU, "Unhandled MUFU sub op: {0:x}",
static_cast<unsigned>(instr.sub_op.Value()));
UNREACHABLE();
}
break;
}
case OpCode::Id::RRO: {
NGLOG_DEBUG(HW_GPU, "Skipping RRO instruction");
break;
}
default: {
NGLOG_CRITICAL(HW_GPU, "Unhandled arithmetic instruction: {} ({}): {}",
static_cast<unsigned>(instr.opcode.EffectiveOpCode()),
OpCode::GetInfo(instr.opcode).name, instr.hex);
NGLOG_CRITICAL(HW_GPU, "Unhandled arithmetic instruction: {}", opcode->GetName());
UNREACHABLE();
}
}
@ -437,7 +448,7 @@ private:
std::string op_b = instr.ffma.negate_b ? "-" : "";
std::string op_c = instr.ffma.negate_c ? "-" : "";
switch (instr.opcode.EffectiveOpCode()) {
switch (opcode->GetId()) {
case OpCode::Id::FFMA_CR: {
op_b += GetUniform(instr.uniform);
op_c += GetRegister(instr.gpr39);
@ -459,9 +470,7 @@ private:
break;
}
default: {
NGLOG_CRITICAL(HW_GPU, "Unhandled FFMA instruction: {} ({}): {}",
static_cast<unsigned>(instr.opcode.EffectiveOpCode()),
OpCode::GetInfo(instr.opcode).name, instr.hex);
NGLOG_CRITICAL(HW_GPU, "Unhandled FFMA instruction: {}", opcode->GetName());
UNREACHABLE();
}
}
@ -473,7 +482,7 @@ private:
std::string gpr0 = GetRegister(instr.gpr0);
const Attribute::Index attribute = instr.attribute.fmt20.index;
switch (instr.opcode.EffectiveOpCode()) {
switch (opcode->GetId()) {
case OpCode::Id::LD_A: {
ASSERT_MSG(instr.attribute.fmt20.size == 0, "untested");
SetDest(instr.attribute.fmt20.element, gpr0, GetInputAttribute(attribute), 1, 4);
@ -504,9 +513,7 @@ private:
break;
}
default: {
NGLOG_CRITICAL(HW_GPU, "Unhandled memory instruction: {} ({}): {}",
static_cast<unsigned>(instr.opcode.EffectiveOpCode()),
OpCode::GetInfo(instr.opcode).name, instr.hex);
NGLOG_CRITICAL(HW_GPU, "Unhandled memory instruction: {}", opcode->GetName());
UNREACHABLE();
}
}
@ -564,7 +571,7 @@ private:
break;
}
default: {
switch (instr.opcode.EffectiveOpCode()) {
switch (opcode->GetId()) {
case OpCode::Id::EXIT: {
ASSERT_MSG(instr.pred.pred_index == static_cast<u64>(Pred::UnusedIndex),
"Predicated exits not implemented");
@ -583,9 +590,7 @@ private:
break;
}
default: {
NGLOG_CRITICAL(HW_GPU, "Unhandled instruction: {} ({}): {}",
static_cast<unsigned>(instr.opcode.EffectiveOpCode()),
OpCode::GetInfo(instr.opcode).name, instr.hex);
NGLOG_CRITICAL(HW_GPU, "Unhandled instruction: {}", opcode->GetName());
UNREACHABLE();
}
}