From cb5c057c87240a9534f8e0d9b7ff2560082f6218 Mon Sep 17 00:00:00 2001
From: Szabolcs Nagy <nsz@port70.net>
Date: Sat, 11 Apr 2015 00:35:07 +0000
Subject: math: fix pow(+-0,-inf) not to raise divbyzero flag

this reverts the commit f29fea00b5bc72d4b8abccba2bb1e312684d1fce
which was based on a bug in C99 and POSIX and did not match IEEE-754
http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1515.pdf
---
 src/math/powl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/math/powl.c')

diff --git a/src/math/powl.c b/src/math/powl.c
index a765706d..5b6da07b 100644
--- a/src/math/powl.c
+++ b/src/math/powl.c
@@ -227,7 +227,7 @@ long double powl(long double x, long double y)
 	if (y <= -LDBL_MAX) {
 		if (x > 1.0 || x < -1.0)
 			return 0.0;
-		if (x != 0.0)
+		if (x != 0.0 || y == -INFINITY)
 			return INFINITY;
 	}
 	if (x >= LDBL_MAX) {
-- 
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