From a4c8508c375f929e330fe033426cb05f65b3d0d6 Mon Sep 17 00:00:00 2001
From: Boris Brezillon <boris.brezillon@collabora.com>
Date: Wed, 8 Dec 2021 10:50:41 +0100
Subject: [PATCH] microsoft/compiler: textureLoad() doesn't take a LOD on MS
 textures

Make sure the LOD is zero in that case.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13993>
---
 src/microsoft/compiler/nir_to_dxil.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/microsoft/compiler/nir_to_dxil.c b/src/microsoft/compiler/nir_to_dxil.c
index 9c1990e6930..e2f0e265470 100644
--- a/src/microsoft/compiler/nir_to_dxil.c
+++ b/src/microsoft/compiler/nir_to_dxil.c
@@ -4640,6 +4640,11 @@ emit_tex(struct ntd_context *ctx, nir_tex_instr *instr)
 
       case nir_tex_src_lod:
          assert(nir_src_num_components(instr->src[i].src) == 1);
+         if (instr->op == nir_texop_txf_ms) {
+            assert(nir_src_as_int(instr->src[i].src) == 0);
+            break;
+         }
+
          /* Buffers don't have a LOD */
          if (instr->sampler_dim != GLSL_SAMPLER_DIM_BUF)
             params.lod_or_sample = get_src(ctx, &instr->src[i].src, 0, type);