From b2a102fb584e55a5c07c25a1caa9575fe1732c14 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vicen=C8=9Biu=20Ciorbaru?= <cvicentiu@gmail.com>
Date: Thu, 23 Nov 2017 13:03:23 +0200
Subject: [PATCH] Fix double floating point error in dtoa.c

When running an optimized build, compiler optimizations cause loss of
precision unless we force the expression to use a double type.
---
 strings/dtoa.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/strings/dtoa.c b/strings/dtoa.c
index 9e0f7f4f43d..eccd05bcf92 100644
--- a/strings/dtoa.c
+++ b/strings/dtoa.c
@@ -1290,7 +1290,7 @@ static double ratio(Bigint *a, Bigint *b)
   dval(&db)= b2d(b, &kb);
   k= ka - kb + 32*(a->wds - b->wds);
   if (k > 0)
-    word0(&da)+= k*Exp_msk1;
+    word0(&da)+= k*Exp_msk1 * 1.0;
   else
   {
     k= -k;