From a1996f6985d8bcbeb7ec53cc9a044497bc290e3d Mon Sep 17 00:00:00 2001
From: Mary Guillemard <mary@mary.zone>
Date: Thu, 5 Feb 2026 09:30:46 +0100
Subject: [PATCH] nak: Legalize ISBERD

This instruction can only take GPRs.

Signed-off-by: Mary Guillemard <mary@mary.zone>
Reviewed-by: Mel Henning <mhenning@darkrefraction.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39716>
---
 src/nouveau/compiler/nak/sm70_encode.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/nouveau/compiler/nak/sm70_encode.rs b/src/nouveau/compiler/nak/sm70_encode.rs
index 8b9a5c24b78..c7fb4437f40 100644
--- a/src/nouveau/compiler/nak/sm70_encode.rs
+++ b/src/nouveau/compiler/nak/sm70_encode.rs
@@ -3751,8 +3751,8 @@ impl SM70Op for OpCS2R {
 }
 
 impl SM70Op for OpIsberd {
-    fn legalize(&mut self, _b: &mut LegalizeBuilder) {
-        // Nothing to do
+    fn legalize(&mut self, b: &mut LegalizeBuilder) {
+        b.copy_src_if_uniform(&mut self.idx);
     }
 
     fn encode(&self, e: &mut SM70Encoder<'_>) {