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shader: bind dispatch spans while keeping GPU record counts native

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Co-authored-by: TheCruZ <thecruzwtf@gmail.com>
This commit is contained in:
nmzik
2026-10-04 10:13:35 +04:00
parent cd9fc6ff2d
commit 8b05b6730e
11 changed files with 207 additions and 16 deletions
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tests/ResourceMaterializationTests.cpp
+40
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@@ -196,6 +196,45 @@ void TestRawScalarAddressPreservesHighBits() {
}
}
void TestDispatchBufferKeepsOnlyBindingLayoutOnHost() {
using namespace Libs::Graphics::ShaderRecompiler::IR;
auto plan = UserDataBufferPlan();
plan.info.buffers[0].dispatch_stride = 64;
plan.info.buffers[0].max_byte_extent = 20;
auto &source = plan.descriptor_sources[0];
source.dwords[1] = Value(20u << 16u);
source.dwords[3] = Value(0x16204u);
std::array<uint32_t, 1> user_data{0x1000u};
uint32_t reads = 0;
const SrtRuntime runtime{.user_data = user_data,
.read_memory = RejectSpecializationRead,
.userdata = &reads,
.read_specialization_memory = RejectSpecializationRead};
ResourceSnapshot snapshot;
ResourceSpecialization specialization;
Check(MaterializeResources(plan, runtime, snapshot, specialization) &&
snapshot.buffers[0].dwords[2] == 0 &&
specialization.buffers[0].packed_stride == 20 && reads == 0,
"native record count was required to materialize its stable binding layout");
for (const auto words : {std::array<uint32_t, 2>{0u, 0x16204u},
{16u << 16u, 0x16204u},
{(20u << 16u) | (1u << 31u), 0x16204u},
{20u << 16u, 0x16204u | (1u << 23u)},
{20u << 16u, 0x16204u | (1u << 28u)}}) {
source.dwords[1] = Value(words[0]);
source.dwords[3] = Value(words[1]);
Check(!MaterializeResources(plan, runtime, snapshot, specialization),
"dispatch buffer accepted a layout outside its native bounds proof");
}
user_data[0] = 0;
source.dwords[1] = Value(0u);
source.dwords[3] = Value(0u);
Check(MaterializeResources(plan, runtime, snapshot, specialization) &&
specialization.buffers[0].packed_stride == 0,
"inactive dispatch buffer did not preserve null binding semantics");
Check(reads == 0, "dispatch buffer layout validation read GPU data on the host");
}
void TestIntegerRuntimeValueFollowsSrtReads() {
using namespace Libs::Graphics::ShaderRecompiler::IR;
auto plan = SrtPlan(0x10000);
@@ -488,6 +527,7 @@ void DbgExit(int) { std::abort(); }
int main() {
TestMappedSrtUsesDirectReaderByDefault();
TestRawScalarAddressPreservesHighBits();
TestDispatchBufferKeepsOnlyBindingLayoutOnHost();
TestIntegerRuntimeValueFollowsSrtReads();
TestUnbasedFlatCacheHitMaterializes();
TestWrittenDescriptorUsesStrictReaderOnce();