From e63713079482fa1e34099619effc7e66af54ee92 Mon Sep 17 00:00:00 2001
From: Faith Ekstrand <faith.ekstrand@collabora.com>
Date: Sun, 29 Mar 2026 01:58:26 -0400
Subject: [PATCH] pan/bi: Use bi_half() for texture MS indices

It feeds into a v2i16 so it needs to be 16-bit.

Fixes: ae79f6765a37 ("pan/bi: Emit Valhall texture instructions")
Reviewed-by: Lorenzo Rossi <lorenzo.rossi@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40720>
---
 src/panfrost/compiler/bifrost/bifrost_compile.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/panfrost/compiler/bifrost/bifrost_compile.c b/src/panfrost/compiler/bifrost/bifrost_compile.c
index 02e30a1620d..da8d8a7c973 100644
--- a/src/panfrost/compiler/bifrost/bifrost_compile.c
+++ b/src/panfrost/compiler/bifrost/bifrost_compile.c
@@ -3762,7 +3762,8 @@ bi_emit_valhall_offsets(bi_builder *b, nir_tex_instr *instr)
    /* Component 2: multisample index */
    if (ms_idx >= 0 && (!nir_src_is_const(instr->src[ms_idx].src) ||
                        nir_src_as_uint(instr->src[ms_idx].src) != 0)) {
-      dest = bi_mkvec_v2i16(b, dest, bi_src_index(&instr->src[ms_idx].src));
+      bi_index ms = bi_src_index(&instr->src[ms_idx].src);
+      dest = bi_mkvec_v2i16(b, bi_half(dest, false), bi_half(ms, false));
    }
 
    /* Component 3: 8-bit LOD */