From b7e23180646c8243178ae5ef490ac80d9767bf14 Mon Sep 17 00:00:00 2001
From: Colby Nyce <iheartridleyman@gmail.com>
Date: Thu, 12 Dec 2024 15:01:09 -0600
Subject: [PATCH] Do not allow dmiWrite to touch x0

---
 sparta/sparta/functional/Register.hpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/sparta/sparta/functional/Register.hpp b/sparta/sparta/functional/Register.hpp
index 4190d3918d..a08bde18f1 100644
--- a/sparta/sparta/functional/Register.hpp
+++ b/sparta/sparta/functional/Register.hpp
@@ -1081,7 +1081,9 @@ class RegisterBase : public TreeNode
     template <typename T>
     void dmiWrite(T val, index_type idx = 0)
     {
-        dmiWrite_(&val, sizeof(val), sizeof(val) * idx);
+        if (getID() || getGroupNum()) {
+            dmiWrite_(&val, sizeof(val), sizeof(val) * idx);
+        }
     }
 
     /*!
@@ -1534,7 +1536,9 @@ class Register : public RegisterBase
     template <typename T>
     inline void dmiWrite(T val, index_type idx = 0)
     {
-        dmiWriteImpl_(&val, sizeof(val), sizeof(val) * idx);
+        if (getID() || getGroupNum()) {
+            dmiWriteImpl_(&val, sizeof(val), sizeof(val) * idx);
+        }
     }
 
     /*!