v2:
- Use helper to add a new source to the texture instruction.
Signed-off-by: Samuel Iglesias Gonsálvez <sigles...@igalia.com>
---
src/compiler/nir/nir_lower_tex.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/src/compiler/nir/nir_lower_tex.c b/src/compiler/nir/nir_lower_tex.c
index 65681decb1c..676c0c21e7a 100644
--- a/src/compiler/nir/nir_lower_tex.c
+++ b/src/compiler/nir/nir_lower_tex.c
@@ -813,6 +813,29 @@ nir_lower_tex_block(nir_block *block, nir_builder *b,
progress = true;
continue;
}
+
+ /* TXF, TXS and TXL require a LOD but not everything we implement using
those
+ * three opcodes provides one. Provide a default LOD of 0.
+ */
+ if (tex->op == nir_texop_txf || tex->op == nir_texop_txs ||
+ tex->op == nir_texop_txl || tex->op == nir_texop_query_levels ||
+ (tex->op == nir_texop_tex && b->shader->stage !=
MESA_SHADER_FRAGMENT)) {
+ int i;
+ bool has_lod = false;
+ for (i = 0; i < tex->num_srcs; i++) {
+ if (tex->src[i].src_type == nir_tex_src_lod) {
+ has_lod = true;
+ break;
+ }
+ }
+
+ if (!has_lod) {
+ b->cursor = nir_before_instr(&tex->instr);
+ nir_tex_instr_add_src(tex, nir_tex_src_lod,
nir_src_for_ssa(nir_imm_int(b, 0)));
+ progress = true;
+ continue;
+ }
+ }
}
return progress;
--
2.14.2
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