[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/math/s_ldexp.c b/ap/libc/glibc/glibc-2.23/math/s_ldexp.c
new file mode 100644
index 0000000..0248ba2
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/math/s_ldexp.c
@@ -0,0 +1,34 @@
+/* @(#)s_ldexp.c 5.1 93/09/24 */
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+#if defined(LIBM_SCCS) && !defined(lint)
+static char rcsid[] = "$NetBSD: s_ldexp.c,v 1.6 1995/05/10 20:47:40 jtc Exp $";
+#endif
+
+#include <math.h>
+#include <math_private.h>
+#include <errno.h>
+
+double __ldexp(double value, int exp)
+{
+ if(!isfinite(value)||value==0.0) return value;
+ value = __scalbn(value,exp);
+ if(!isfinite(value)||value==0.0) __set_errno (ERANGE);
+ return value;
+}
+weak_alias (__ldexp, ldexp)
+weak_alias (__ldexp, scalbn)
+#ifdef NO_LONG_DOUBLE
+strong_alias (__ldexp, __ldexpl)
+weak_alias (__ldexp, ldexpl)
+weak_alias (__ldexp, scalbnl)
+#endif