From 7def0928040f29a3496b5e5b7c64a95b8b2ff8ad Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Tue, 28 Feb 2017 02:58:12 +0000
Subject: Makefile.sub: ULL_TO_DOUBLE

* win32/Makefile.sub (config.h): define ULL_TO_DOUBLE for
  conversion from unsigned __int64 to double, which is not
  implemented in till Visual Studio.NET 2003, aka VC7.1.

* bignum.c (estimate_initial_sqrt): use ULL_TO_DOUBLE if defined.

* numeric.c (BDIGIT_DBL_TO_DOUBLE): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57740 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 win32/Makefile.sub | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'win32/Makefile.sub')

diff --git a/win32/Makefile.sub b/win32/Makefile.sub
index f37b6c654b..790b41a4f1 100644
--- a/win32/Makefile.sub
+++ b/win32/Makefile.sub
@@ -550,6 +550,8 @@ $(CONFIG_H): $(MKFILES) $(srcdir)/win32/Makefile.sub $(win_srcdir)/Makefile.sub
 #define HAVE_MEMORY_H 1
 !if $(MSC_VER) >= 1400
 #define HAVE_LONG_LONG 1
+!else
+#define ULL_TO_DOUBLE(n) ((double)(unsigned long)((n)>>32) * (1I64 << 32) + (unsigned long)(n))
 !endif
 #define HAVE_OFF_T 1
 #define SIZEOF_INT 4
-- 
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