From 9b0a6be371bbd8eb217849f3216e9f76c6ed9cc0 Mon Sep 17 00:00:00 2001
From: Nicholas McKibben <nicholas.bgp@gmail.com>
Date: Sat, 4 Feb 2023 22:16:41 -0700
Subject: [PATCH] FIX: avoid overflow on overflow check in toms748_solve
 safe_div

---
 include/boost/math/tools/toms748_solve.hpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/boost/math/tools/toms748_solve.hpp b/include/boost/math/tools/toms748_solve.hpp
index 2de491a951..15599e8297 100644
--- a/include/boost/math/tools/toms748_solve.hpp
+++ b/include/boost/math/tools/toms748_solve.hpp
@@ -160,7 +160,8 @@ inline T safe_div(T num, T denom, T r)
 
    if(fabs(denom) < 1)
    {
-      if(fabs(denom * tools::max_value<T>()) <= fabs(num))
+      static const T inv_max_value = 1.0 / tools::max_value<T>();
+      if(fabs(denom) <= inv_max_value * fabs(num))
          return r;
    }
    return num / denom;