[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/build/uClibc/libm/e_scalb.c b/ap/build/uClibc/libm/e_scalb.c
new file mode 100644
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--- /dev/null
+++ b/ap/build/uClibc/libm/e_scalb.c
@@ -0,0 +1,59 @@
+/*
+ * ====================================================
+ * 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.
+ * ====================================================
+ */
+
+/*
+ * __ieee754_scalb(x, fn) is provided for
+ * passing various standard test suites.
+ * One should use scalbn() instead.
+ */
+
+#include "math.h"
+#include "math_private.h"
+#include <errno.h>
+
+double attribute_hidden __ieee754_scalb(double x, double fn)
+{
+ if (isnan(x)||isnan(fn)) return x*fn;
+ if (!isfinite(fn)) {
+ if(fn>0.0) return x*fn;
+ else return x/(-fn);
+ }
+ if (rint(fn)!=fn) return (fn-fn)/(fn-fn);
+ if ( fn > 65000.0) return scalbn(x, 65000);
+ if (-fn > 65000.0) return scalbn(x,-65000);
+ return scalbn(x,(int)fn);
+}
+
+#if defined __UCLIBC_SUSV3_LEGACY__
+/*
+ * wrapper scalb(double x, double fn) is provided for
+ * passing various standard test suites.
+ * One should use scalbn() instead.
+ */
+#ifndef _IEEE_LIBM
+double scalb(double x, double fn)
+{
+ double z = __ieee754_scalb(x, fn);
+ if (_LIB_VERSION == _IEEE_)
+ return z;
+ if (!(isfinite(z) || isnan(z)) && isfinite(x))
+ return __kernel_standard(x, (double)fn, 32); /* scalb overflow */
+ if (z == 0.0 && z != x)
+ return __kernel_standard(x, (double)fn, 33); /* scalb underflow */
+ if (!isfinite(fn))
+ errno = ERANGE;
+ return z;
+}
+#else
+strong_alias(__ieee754_scalb, scalb)
+#endif
+
+#endif /* UCLIBC_SUSV3_LEGACY */