From 1db209763a70b825db775e684ef3a21a6b5b9757 Mon Sep 17 00:00:00 2001
From: mrkn <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 31 May 2013 16:59:09 +0000
Subject: [PATCH] * ext/bigdecimal/bigdecimal.c (BigDecimal_power): use
 rb_dbl2big   to convert a double value to a Bignum.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41008 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog                   | 5 +++++
 ext/bigdecimal/bigdecimal.c | 7 ++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index f9fa1e7af2..866a4acf2f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sat Jun 01 01:50:00 2013  Kenta Murata  <mrkn@mrkn.jp>
+
+	* ext/bigdecimal/bigdecimal.c (BigDecimal_power): use rb_dbl2big
+	  to convert a double value to a Bignum.
+
 Sat Jun  1 00:19:50 2013  Tanaka Akira  <akr@fsij.org>
 
 	* bignum.c (calc_hbase): Make hbase the maximum power of base
diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c
index 06b3886eb5..2a0aea8b32 100644
--- a/ext/bigdecimal/bigdecimal.c
+++ b/ext/bigdecimal/bigdecimal.c
@@ -2183,7 +2183,12 @@ retry:
       case T_FLOAT:
 	d = RFLOAT_VALUE(vexp);
 	if (d == round(d)) {
-	    vexp = LL2NUM((LONG_LONG)round(d));
+	    if (FIXABLE(d)) {
+		vexp = LONG2FIX((long)d);
+	    }
+	    else {
+		vexp = rb_dbl2big(d);
+	    }
 	    goto retry;
 	}
 	exp = GetVpValueWithPrec(vexp, DBL_DIG+1, 1);