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spritequad: recreation + analysis (disabled, no improvement)

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Faithful recreation of RenderSpriteQuads (0x5A0F50) with hoisted
invariant division and inlined DisplayMode_CalculateOffset. No
measurable improvement — cost is dominated by getAdapterInfo (7
sub-calls to D3D device per invocation × 3203 calls/frame) and
DrawPrimitive/DrawIndexedPrimitive virtual dispatch.

Added decompilation and assembly dumps for future reference.
This commit is contained in:
MarcelineVQ
2026-03-24 00:36:37 -07:00
parent 1046c0a4e3
commit 3d872fdb1e
4 changed files with 304 additions and 1 deletions
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src/transform44/transform44.zig
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@@ -26,6 +26,7 @@ extern fn calcColorValues_SSE(u32, u32, u32, u32, u32, u32, u32) callconv(.{ .x8
extern fn renderParticleSprites_SSE(u32, u32, u32) callconv(.{ .x86_thiscall = .{} }) u32;
extern fn resetParticleCache() void;
extern fn setupParticleRendering_SSE(u32, u32) callconv(.{ .x86_thiscall = .{} }) void;
extern fn renderSpriteQuads_SSE(u32, u32, u32, u32) callconv(.{ .x86_thiscall = .{} }) void;
extern var stride_info: [8]u32; // exported from particle_sse.zig
extern var debug_vertex_count: u32;
extern var debug_max_sprites: u32;