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Celegans12
2eda9f893c
Hull programs whose relative patch index (v1 bits 7:0) reached anything but a tessellation ring or LDS address threw, because the lowering runs every Vulkan patch as relative patch 0. The quad terrain hull 0x80002fc700 in Ghost of Yotei is one, and so is the domain 0x8068fbd900 (v7). Such hulls and domains now take (PrimitiveID mod GE_CNTL.PRIM_GRP_SIZE) mod VGT_LS_HS_CONFIG.NUM_PATCHES, as if hull threadgroups took NUM_PATCHES patches at a time out of each primitive group; both stages see the same PrimitiveID for a patch. This holds only when every instance starts a new threadgroup, so it needs GE_CNTL.BREAK_WAVE_AT_EOI (bit 18); with the bit clear the instances share threadgroups and such programs still throw. PRIM_GRP_SIZE and BREAK_WAVE_AT_EOI join the tessellation configuration (draw keys, hull and domain cache keys, request version 24). A missing GE_CNTL throws, and so do local programs, whose relative vertex index depends on vertex reuse that Vulkan does not expose.