From 7c0da1747a89a8cea27a42ace51b318e9d843a19 Mon Sep 17 00:00:00 2001
From: Giovanni Mascellani <gmascellani@codeweavers.com>
Date: Thu, 12 Jun 2025 19:22:07 +0200
Subject: [PATCH] vkd3d-shader/dxil: Allow constant zero values to be floating
 point.

This fixes commit 59fb3a789384dab1db4d779338c03a121debb5e6, where
the floating point alternative was mistakenly ignored.
---
 libs/vkd3d-shader/dxil.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/libs/vkd3d-shader/dxil.c b/libs/vkd3d-shader/dxil.c
index 53578ce71..1c7ed0d9e 100644
--- a/libs/vkd3d-shader/dxil.c
+++ b/libs/vkd3d-shader/dxil.c
@@ -2271,9 +2271,19 @@ static inline bool sm6_value_is_constant(const struct sm6_value *value)
 
 static bool sm6_value_is_constant_zero(const struct sm6_value *value)
 {
-    if (value->value_type != VALUE_TYPE_CONSTANT || value->type->class != TYPE_CLASS_INTEGER)
+    if (value->value_type != VALUE_TYPE_CONSTANT)
         return false;
 
+    switch (value->type->class)
+    {
+        case TYPE_CLASS_INTEGER:
+        case TYPE_CLASS_FLOAT:
+            break;
+
+        default:
+            return false;
+    }
+
     if (value->type->u.width == 64)
         return value->u.constant.immconst.immconst_u64[0] == 0;
     else