Execute_Prim: Add a smaller "inner interpreter" to speed long up sequences of PRIM commands #10658
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…o the runloop during long sequences of PRIM commands. Helps performance by a quite measurable 1-4% in several PRIM-heavy games.
hrydgard
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Rebased on master. |
GPU/GPUCommon.cpp
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| @@ -1543,6 +1543,9 @@ void GPUCommon::Execute_Prim(u32 op, u32 diff) { | |||
| // PRIM commands with other commands. A special case that might be interesting is that game | |||
| // that changes culling mode between each prim, we could just change the triangle winding | |||
| // right here to still be able to join draw calls. | |||
| if (debugRecording_) | |||
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Might be nice to add || host->GPUDebuggingActive() here so that step prim works.
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I guess that depends on what you're debugging, it's kind of nice when stepping prim to see that the inner interpreter succeeds in running them in one pass, plus we don't flush after each prim when it does anyway so there's not much to see. But yeah, I guess in the usual case it's confusing to have it jump like that..
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To avoid going back to the runloop during long sequences of PRIM commands, and thus also avoiding all sorts of checking for the current framebuffer etc that are part of Execute_Prim.
Helps performance by a quite measurable 1-5% in several PRIM-heavy games.
Not particularly pretty, but effective.
This is also a first step towards fixing the performance of Earth Defense Force 2 and I believe possibly a couple of other games (Gundam?) which flip cull direction every few primitives.