GXInvalidateVtxCache

• Category: Geometry and Vertex
• Matrix Status: Implemented
• Matrix Notes: Implemented as backend no-op (expected on modern GL path).
• Matrix Link: Gfx-GX-API-Matrix

Official SDK (Reference)

• Manual root: reference/rvlsdk/man/en_US/gx
• Primary SDK source area: demos/PikminDemo/src/gx (GC-style Dolphin GX source)
• Notes:
  • Confirm official signature/prototype
  • Confirm documented side effects (register/state updates)
  • Confirm special behavior and edge cases from manual

libPorpoise Implementation

• Runtime implementation area: src/gx
• Public API surface: include/dolphin/gx
• Notes:
  • Confirm API signature matches SDK
  • Confirm state writes match SDK semantics
  • Confirm backend behavior in PC renderer path

SDK vs Porpoise Diff

• Signature parity:
  • SDK:
  • Porpoise:
• Behavioral parity:
  • SDK:
  • Porpoise:

• Known divergence:

Validation Checklist

• GX demo coverage checked
• Pikmin usage path checked
• Matrix status updated if needed
• Notes updated with concrete file/function references

Working Notes

• Docs checked against reference/man/gfx/gx/Geometry/GXInvalidateVtxCache.html:
  • Signature matches: void GXInvalidateVtxCache(void).
  • Intended HW behavior: invalidate GP vertex-cache tags for indexed attributes after array relocation/modification.
  • Manual emulator note says not implemented.
• Runtime checked in src/gx/pc_gx.c:
  • Function exists as explicit no-op (void GXInvalidateVtxCache(void) { }).
  • This is acceptable on the GL backend path because there is no emulated fixed-function GX vertex cache to invalidate.