From d6fcc5b8b5e9eb8780c054779ee96ed7e6b4b080 Mon Sep 17 00:00:00 2001
From: Jake Turner <jake@evansturner.co.uk>
Date: Tue, 28 Oct 2025 15:25:07 +0000
Subject: [PATCH] DXIL Debugger fix incorrect assert for derivatives

A pixel shader might be simulating a complete subgroup not just a quad
---
 renderdoc/driver/shaders/dxil/dxil_debug.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/renderdoc/driver/shaders/dxil/dxil_debug.cpp b/renderdoc/driver/shaders/dxil/dxil_debug.cpp
index e98c2edd3..05e9a2b0c 100644
--- a/renderdoc/driver/shaders/dxil/dxil_debug.cpp
+++ b/renderdoc/driver/shaders/dxil/dxil_debug.cpp
@@ -3093,7 +3093,7 @@ bool ThreadState::ExecuteInstruction(const rdcarray<ThreadState> &workgroup)
           case DXOp::DerivFineX:
           case DXOp::DerivFineY:
           {
-            if(m_ShaderType != DXBC::ShaderType::Pixel || workgroup.size() != 4)
+            if(m_ShaderType != DXBC::ShaderType::Pixel || workgroup.size() < 4)
             {
               RDCERR("Undefined results using derivative instruction outside of a pixel shader.");
             }