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AnyPS5/docs/dev
battleblob1andClaude Opus 5.5 f95471ec6a feat(shader): read domain inputs at a control-point index computed from data
A domain program that picks one of its patch's control points from data
(Onimusha: Way of the Sword, PPSA27836, selects a corner with v_cmp and
v_cndmask before a buffer_load from the off-chip ring) was refused with
"the tessellation ring or LDS address is not affine in the control point
and relative patch". Computed indices were accepted only for hull LDS
reads.

- The address evaluator gives off-chip EvaluationInput reads the same
  dynamic term as hull LDS reads, and a value read from the patch's own
  ring or LDS no longer counts as depending on the relative patch index,
  since the lowered read takes the patch implicitly.
- When the program also uses its relative patch index as data, the
  index is replaced by the grouped patch instead of 0, which left a
  computed read's address pointing into another patch. Such reads now
  subtract their relative patch term, for hull and domain reads alike;
  reads in programs that do not use the index as data keep their address.
- The computed offset must be a whole number of control points, and the
  backend clamps the domain gl_in index to the last output control point
  as it already does for hull reads.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
2026-10-20 03:05:55 +03:00
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