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shader: memoize the tessellation layout per LS/HS pair and VGT configuration

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This commit is contained in:
Mr. Big Britches
2026-10-20 08:37:43 +02:00
committed by nmzik
parent f3e01aaf1e
commit c715891242
1 changed files with 14 additions and 1 deletions
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src/graphics/shader/shader.cpp
+14 -1
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@@ -47,6 +47,8 @@ struct ShaderMapEntry {
static std::unique_ptr<std::unordered_map<uint64_t, ShaderMapEntry>> g_shader_map; static std::unique_ptr<std::unordered_map<uint64_t, ShaderMapEntry>> g_shader_map;
static std::mutex g_shader_map_mutex; static std::mutex g_shader_map_mutex;
static std::unordered_map<uint64_t, ShaderTessellationInputInfo> g_tess_layouts;
static std::mutex g_tess_layouts_mutex;
void ShaderInit() { void ShaderInit() {
EXIT_IF(g_shader_map != nullptr); EXIT_IF(g_shader_map != nullptr);
@@ -652,7 +654,18 @@ PrepareTessellationPrograms(const HW::VertexShaderInfo& regs, const HW::Context&
}; };
EXIT_IF(tess.input_control_points == 0 || tess.input_control_points > 32 || EXIT_IF(tess.input_control_points == 0 || tess.input_control_points > 32 ||
tess.output_control_points == 0 || tess.output_control_points > 32); tess.output_control_points == 0 || tess.output_control_points > 32);
ShaderRecompiler::AnalyzeTessellationPrograms(params[0].code, params[1].code, tess); // Reflection decodes both programs; the key also covers the VGT fields cached in tess.
const uint64_t key[] = {local_hash, control_hash,
uint64_t {sh.m_vgtLsHsConfig & 0xfff00u} << 32u | sh.m_vgtTfParam};
{
std::scoped_lock lock(g_tess_layouts_mutex);
auto [entry, inserted] = g_tess_layouts.try_emplace(XXH3_64bits(key, sizeof(key)), tess);
if (inserted) {
ShaderRecompiler::AnalyzeTessellationPrograms(params[0].code, params[1].code,
entry->second);
}
tess = entry->second;
}
for (auto& stage: input_info) { for (auto& stage: input_info) {
stage.tess = tess; stage.tess = tess;
} }