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intel/brw: Use VEC for emit_unzip()

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Helps make SIMD-split code more SSA-friendly.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28971>
This commit is contained in:
Kenneth Graunke 2024-02-24 00:45:54 -08:00
parent 1b54b4fad5
commit 84139470a5
1 changed files with 6 additions and 3 deletions
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9
src/intel/compiler/brw_fs_lower_simd_width.cpp
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@ -482,10 +482,13 @@ emit_unzip(const fs_builder &lbld, fs_inst *inst, unsigned i)
const fs_reg src = horiz_offset(inst->src[i], lbld.group() - inst->group);
if (needs_src_copy(lbld, inst, i)) {
const fs_reg tmp = lbld.vgrf(inst->src[i].type, inst->components_read(i));
const unsigned num_components = inst->components_read(i);
const fs_reg tmp = lbld.vgrf(inst->src[i].type, num_components);
for (unsigned k = 0; k < inst->components_read(i); ++k)
lbld.MOV(offset(tmp, lbld, k), offset(src, inst->exec_size, k));
fs_reg comps[num_components];
for (unsigned k = 0; k < num_components; ++k)
comps[k] = offset(src, inst->exec_size, k);
lbld.VEC(tmp, comps, num_components);
return tmp;