From 52bcf3f5fb3251dca4df5b97b01543160340b31b Mon Sep 17 00:00:00 2001
From: Szabolcs Nagy <nsz@port70.net>
Date: Tue, 13 Nov 2012 00:45:51 +0100
Subject: math: fix logb*.c exceptions now that ilogb raises invalid

---
 src/math/logbl.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

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

diff --git a/src/math/logbl.c b/src/math/logbl.c
index 5d04abd7..f3850745 100644
--- a/src/math/logbl.c
+++ b/src/math/logbl.c
@@ -1,4 +1,3 @@
-#include <limits.h>
 #include "libm.h"
 #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
 long double logbl(long double x)
@@ -8,12 +7,10 @@ long double logbl(long double x)
 #else
 long double logbl(long double x)
 {
-	int i = ilogbl(x);
-
-	if (i == FP_ILOGB0)
-		return -1.0/fabsl(x);
-	if (i == FP_ILOGBNAN || i == INT_MAX)
+	if (!isfinite(x))
 		return x * x;
-	return i;
+	if (x == 0)
+		return -1/(x+0);
+	return ilogbl(x);
 }
 #endif
-- 
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