From f7866df201e491aa6033cc4618ab21cedd12a2e2 Mon Sep 17 00:00:00 2001
From: Giovanni Mascellani <gmascellani@codeweavers.com>
Date: Sun, 27 Jul 2025 14:38:03 +0200
Subject: [PATCH] vkd3d-shader/dxil: Emit gather offsets as signed.

This is important for the MSL generator, otherwise invalid MSL
is emitted.
---
 libs/vkd3d-shader/dxil.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libs/vkd3d-shader/dxil.c b/libs/vkd3d-shader/dxil.c
index 66e3c1ecd..19e9f54ed 100644
--- a/libs/vkd3d-shader/dxil.c
+++ b/libs/vkd3d-shader/dxil.c
@@ -6291,6 +6291,10 @@ static void sm6_parser_emit_dx_texture_gather(struct sm6_parser *sm6, enum dx_in
         return;
     }
 
+    /* DXIL doesn't know about signedness, but vsir expects the offset to be signed. */
+    if (extended_offset)
+        offset.data_type = VSIR_DATA_I32;
+
     ins = state->ins;
     if (op == DX_TEXTURE_GATHER)
     {