From f96332207622ccc80861239e05a98f93e4c4dd28 Mon Sep 17 00:00:00 2001
From: Flavien Solt <flavien@nus.edu.sg>
Date: Fri, 19 Jun 2026 16:00:16 +0800
Subject: [PATCH] Preserve sign of negative zero

---
 tgt-vvp/eval_real.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tgt-vvp/eval_real.c b/tgt-vvp/eval_real.c
index a61ab0f39..0c685624f 100644
--- a/tgt-vvp/eval_real.c
+++ b/tgt-vvp/eval_real.c
@@ -202,9 +202,9 @@ static void draw_realnum_real(ivl_expr_t expr)
 	    return;
       }
 
-      if (value < 0) {
+      if (signbit(value)) {
 	    sign = 0x4000;
-	    value *= -1;
+	    value = -value;
       }
 
       fract = frexp(value, &expo);