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Merge pull request #500 from Subv/long_queries

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GPU: Partial implementation of long GPU queries.
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bunnei 2018-06-03 21:24:50 -04:00 committed by GitHub
commit ba117854f9
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1 changed files with 24 additions and 9 deletions
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31
src/video_core/engines/maxwell_3d.cpp
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@ -156,16 +156,15 @@ void Maxwell3D::ProcessQueryGet() {
// TODO(Subv): Support the other query units.
ASSERT_MSG(regs.query.query_get.unit == Regs::QueryUnit::Crop,
"Units other than CROP are unimplemented");
ASSERT_MSG(regs.query.query_get.short_query,
"Writing the entire query result structure is unimplemented");
u32 value = Memory::Read32(*address);
u32 result = 0;
u64 result = 0;
// TODO(Subv): Support the other query variables
switch (regs.query.query_get.select) {
case Regs::QuerySelect::Zero:
result = 0;
// This seems to actually write the query sequence to the query address.
result = regs.query.query_sequence;
break;
default:
UNIMPLEMENTED_MSG("Unimplemented query select type {}",
@ -174,15 +173,31 @@ void Maxwell3D::ProcessQueryGet() {
// TODO(Subv): Research and implement how query sync conditions work.
struct LongQueryResult {
u64_le value;
u64_le timestamp;
};
static_assert(sizeof(LongQueryResult) == 16, "LongQueryResult has wrong size");
switch (regs.query.query_get.mode) {
case Regs::QueryMode::Write:
case Regs::QueryMode::Write2: {
// Write the current query sequence to the sequence address.
u32 sequence = regs.query.query_sequence;
if (regs.query.query_get.short_query) {
// Write the current query sequence to the sequence address.
// TODO(Subv): Find out what happens if you use a long query type but mark it as a short
// query.
Memory::Write32(*address, sequence);
// TODO(Subv): Write the proper query response structure to the address when not using short
// mode.
} else {
// Write the 128-bit result structure in long mode. Note: We emulate an infinitely fast
// GPU, this command may actually take a while to complete in real hardware due to GPU
// wait queues.
LongQueryResult query_result{};
query_result.value = result;
// TODO(Subv): Generate a real GPU timestamp and write it here instead of 0
query_result.timestamp = 0;
Memory::WriteBlock(*address, &query_result, sizeof(query_result));
}
break;
}
default: