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Initial shader decompilation work

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wheremyfoodat 2024-07-22 01:47:34 +03:00
parent d7bca1460c
commit 2d72b66042
2 changed files with 136 additions and 3 deletions
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54
src/core/PICA/shader_decompiler.cpp
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@ -1 +1,53 @@
#include "PICA/shader_decompiler.hpp"
#include "PICA/shader_decompiler.hpp"
#include "config.hpp"
using namespace PICA;
using namespace PICA::ShaderGen;
using Function = ControlFlow::Function;
using ExitMode = Function::ExitMode;
void ControlFlow::analyze(const PICAShader& shader, u32 entrypoint) {
analysisFailed = false;
const Function* function = addFunction(entrypoint, PICAShader::maxInstructionCount);
if (function == nullptr) {
analysisFailed = true;
}
}
ExitMode analyzeFunction(u32 start, u32 end, Function::Labels& labels) { return ExitMode::Unknown; }
std::string ShaderDecompiler::decompile() {
controlFlow.analyze(shader, entrypoint);
if (controlFlow.analysisFailed) {
return "";
}
decompiledShader = "";
switch (api) {
case API::GL: decompiledShader += "#version 410 core"; break;
case API::GLES: decompiledShader += "#version 300 es"; break;
default: break;
}
if (config.accurateShaderMul) {
// Safe multiplication handler from Citra: Handles the PICA's 0 * inf = 0 edge case
decompiledShader += R"(
vec4 safe_mul(vec4 a, vec4 b) {
vec4 res = a * b;
return mix(res, mix(mix(vec4(0.0), res, isnan(rhs)), product, isnan(lhs)), isnan(res));
}
)";
}
return decompiledShader;
}
std::string PICA::ShaderGen::decompileShader(PICAShader& shader, EmulatorConfig& config, u32 entrypoint, API api, Language language) {
ShaderDecompiler decompiler(shader, config, entrypoint, api, language);
return decompiler.decompile();
}