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brw: Add VUE header varyings to io_component()

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This is needed for VS/TES/GS outputs.  Mesh takes a different path
because those are per-primitive.

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39666>
This commit is contained in:
Kenneth Graunke 2026-01-29 10:49:43 -08:00 • committed by Marge Bot
parent 54def4020c
commit 1f0773e951
1 changed files with 11 additions and 4 deletions
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15
src/intel/compiler/brw/brw_nir.c
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@ -92,10 +92,17 @@ io_component(nir_intrinsic_instr *io,
const int offset = cb_data->per_primitive_byte_offsets[sem.location];
assert(offset != -1);
c += (offset % 16) / 4;
} else if (nir_intrinsic_has_io_semantics(io) &&
nir_intrinsic_io_semantics(io).location == VARYING_SLOT_PSIZ) {
/* Point Size lives in component .w of the VUE header */
c += 3;
} else if (nir_intrinsic_has_io_semantics(io)) {
const nir_io_semantics sem = nir_intrinsic_io_semantics(io);
/* The VUE header stores Primitive Shading Rate (.x), Layer (.y),
* Viewport (.z), and Point Size (.w) in a single vec4.
*/
if (sem.location == VARYING_SLOT_LAYER)
c += 1;
else if (sem.location == VARYING_SLOT_VIEWPORT)
c += 2;
else if (sem.location == VARYING_SLOT_PSIZ)
c += 3;
}
return c;