X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fmath%2Filogbl.c;h=ed9ddcbc42582ac0fb2c0ab5923a0bccb6ccd050;hb=3678e6f4bb3efec5f0c1a7c453f686c17fa9867d;hp=acaf31212a33ea394d4e1d985ebaa81db848e4c4;hpb=fc04675a09587031d5daebcb877b73976890b71d;p=libm

diff --git a/src/math/ilogbl.c b/src/math/ilogbl.c
index acaf312..ed9ddcb 100644
--- a/src/math/ilogbl.c
+++ b/src/math/ilogbl.c
@@ -1,11 +1,12 @@
 #include <limits.h>
 #include "libm.h"
-#if LD64
+
+#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
 int ilogbl(long double x)
 {
 	return ilogb(x);
 }
-#elif LD80
+#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384
 int ilogbl(long double x)
 {
 	union ldshape u = {x};
@@ -21,7 +22,7 @@ int ilogbl(long double x)
 	}
 	if (e == 0x7fff)
 		/* in ld80 msb is set in inf */
-		return m & ~(uint64_t)1<<63 ? FP_ILOGBNAN : INT_MAX;
+		return m & (uint64_t)-1>>1 ? FP_ILOGBNAN : INT_MAX;
 	return e - 0x3fff;
 }
 #endif