Zebediah Figura : vkd3d-shader/hlsl: Only read used coordinates in encode_texel_offset_as_aoffimmi().

[Alexandre Julliard]

Module: vkd3d
Branch: master
Commit: 974528cbe3233c1a20fe3bf3aa04c66324b9f51e
URL:    https://gitlab.winehq.org/wine/vkd3d/-/commit/974528cbe3233c1a20fe3bf3aa04c6...

Author: Zebediah Figura 
Date:   Mon Jun  5 12:32:27 2023 -0500

vkd3d-shader/hlsl: Only read used coordinates in encode_texel_offset_as_aoffimmi().

The V and W offsets may be uninitialized, which may spuriously trigger "out of range" errors.

---

libs/vkd3d-shader/tpf.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/libs/vkd3d-shader/tpf.c b/libs/vkd3d-shader/tpf.c
index b252270c..d066b13e 100644
--- a/libs/vkd3d-shader/tpf.c
+++ b/libs/vkd3d-shader/tpf.c
@@ -3657,8 +3657,12 @@ static bool encode_texel_offset_as_aoffimmi(struct sm4_instruction *instr,

modif.type = VKD3D_SM4_MODIFIER_AOFFIMMI;
     modif.u.aoffimmi.u = offset->value.u[0].i;
-    modif.u.aoffimmi.v = offset->value.u[1].i;
-    modif.u.aoffimmi.w = offset->value.u[2].i;
+    modif.u.aoffimmi.v = 0;
+    modif.u.aoffimmi.w = 0;
+    if (offset->node.data_type->dimx > 1)
+        modif.u.aoffimmi.v = offset->value.u[1].i;
+    if (offset->node.data_type->dimx > 2)
+        modif.u.aoffimmi.w = offset->value.u[2].i;
     if (modif.u.aoffimmi.u < -8 || modif.u.aoffimmi.u > 7
             || modif.u.aoffimmi.v < -8 || modif.u.aoffimmi.v > 7
             || modif.u.aoffimmi.w < -8 || modif.u.aoffimmi.w > 7)