From 1fa7b45df8b146a42dc99af9004ce9ea93e7748b Mon Sep 17 00:00:00 2001
From: Jack Ren <jack.ren@intel.com>
Date: Tue, 28 Feb 2012 12:02:21 +0800
Subject: [PATCH] libm: cherry-pick one patch from freebsd to fix logb()
 denormals issue

from http://svnweb.freebsd.org/base?view=revision&revision=176101
"
Oops, fix the fix in rev.1.10.  logb() and logbf() were broken on
 denormals, and logb() remained broken after 1.10 because the fix for
 logbf() was incompletely translated.

Convert to __FBSDID().
"

Change-Id: I54f33648db7c421b06eee1ea8e63c57a179fae0d
Signed-off-by: Jack Ren <jack.ren@intel.com>
Signed-off-by: Jin Wei <wei.a.jin@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
---
 libm/src/s_logb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libm/src/s_logb.c b/libm/src/s_logb.c
index 30edb8749..57f91c44d 100644
--- a/libm/src/s_logb.c
+++ b/libm/src/s_logb.c
@@ -36,9 +36,9 @@ logb(double x)
 	if(ix>=0x7ff00000) return x*x;
 	if(ix<0x00100000) {
 		x *= two54;		 /* convert subnormal x to normal */
-		GET_FLOAT_WORD(ix,x);
+		GET_HIGH_WORD(ix,x);
 		ix &= 0x7fffffff;
-		return (float) ((ix>>20)-1023-54);
+		return (double) ((ix>>20)-1023-54);
 	} else
 		return (double) ((ix>>20)-1023);
 }