From c3587effe27a3ac8c1406f064b7705963be9887a Mon Sep 17 00:00:00 2001
From: nsz <nsz@port70.net>
Date: Mon, 19 Mar 2012 19:14:32 +0100
Subject: [PATCH] minor fix in __tanl (get sign properly)

---
 src/math/__tanl.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/math/__tanl.c b/src/math/__tanl.c
index e39e9df4..50ba2140 100644
--- a/src/math/__tanl.c
+++ b/src/math/__tanl.c
@@ -51,8 +51,7 @@ long double __tanl(long double x, long double y, int iy) {
 	int i;
 
 	iy = iy == 1 ? -1 : 1;        /* XXX recover original interface */
-	// FIXME: this is wrong, use copysign, signbit or union bithack
-	osign = x >= 0 ? 1.0 : -1.0;  /* XXX slow, probably wrong for -0 */
+	osign = copysignl(1.0, x);
 	if (fabsl(x) >= 0.67434) {
 		if (x < 0) {
 			x = -x;
-- 
2.20.1