From 2412caed0dfad31332878410e78754880654c60b Mon Sep 17 00:00:00 2001
From: Ihsane TAHIR <ihsane.tahir@cea.fr>
Date: Fri, 29 Aug 2025 13:51:02 +0200
Subject: [PATCH] Fix: Handle underflow properly at subnormal/normal boundary

---
 .../openc910/C910_RTL_FACTORY/gen_rtl/vfdsu/rtl/ct_vfdsu_pack.v | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/vendor/openc910/C910_RTL_FACTORY/gen_rtl/vfdsu/rtl/ct_vfdsu_pack.v b/vendor/openc910/C910_RTL_FACTORY/gen_rtl/vfdsu/rtl/ct_vfdsu_pack.v
index 681b77a..fe56ca0 100644
--- a/vendor/openc910/C910_RTL_FACTORY/gen_rtl/vfdsu/rtl/ct_vfdsu_pack.v
+++ b/vendor/openc910/C910_RTL_FACTORY/gen_rtl/vfdsu/rtl/ct_vfdsu_pack.v
@@ -404,7 +404,7 @@ assign ex4_rst_inf[63:0]       = (vfdsu_ex4_double) ? ex4_doub_rst_inf[63:0] :
                                   vfdsu_ex4_half    ? ex4_half_rst_inf[63:0] : ex4_bfloat_rst_inf[63:0];
 
       
-assign ex4_cor_uf            = (vfdsu_ex4_uf && !ex4_denorm_potnt_norm || ex4_uf_plus)
+assign ex4_cor_uf            = (vfdsu_ex4_uf || ex4_denorm_potnt_norm || ex4_uf_plus)
                                && vfdsu_ex4_nx;
 assign ex4_cor_nx            =  vfdsu_ex4_nx 
                                 || vfdsu_ex4_of 
-- 
2.17.2

