[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/math/s_clog10l.c b/ap/libc/glibc/glibc-2.23/math/s_clog10l.c
new file mode 100644
index 0000000..da40477
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/math/s_clog10l.c
@@ -0,0 +1,127 @@
+/* Compute complex base 10 logarithm.
+ Copyright (C) 1997-2016 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <complex.h>
+#include <math.h>
+#include <math_private.h>
+#include <float.h>
+
+/* To avoid spurious underflows, use this definition to treat IBM long
+ double as approximating an IEEE-style format. */
+#if LDBL_MANT_DIG == 106
+# undef LDBL_EPSILON
+# define LDBL_EPSILON 0x1p-106L
+#endif
+
+/* log_10 (2). */
+#define M_LOG10_2l 0.3010299956639811952137388947244930267682L
+
+/* pi * log10 (e). */
+#define M_PI_LOG10El 1.364376353841841347485783625431355770210L
+
+__complex__ long double
+__clog10l (__complex__ long double x)
+{
+ __complex__ long double result;
+ int rcls = fpclassify (__real__ x);
+ int icls = fpclassify (__imag__ x);
+
+ if (__glibc_unlikely (rcls == FP_ZERO && icls == FP_ZERO))
+ {
+ /* Real and imaginary part are 0.0. */
+ __imag__ result = signbit (__real__ x) ? M_PI_LOG10El : 0.0;
+ __imag__ result = __copysignl (__imag__ result, __imag__ x);
+ /* Yes, the following line raises an exception. */
+ __real__ result = -1.0 / fabsl (__real__ x);
+ }
+ else if (__glibc_likely (rcls != FP_NAN && icls != FP_NAN))
+ {
+ /* Neither real nor imaginary part is NaN. */
+ long double absx = fabsl (__real__ x), absy = fabsl (__imag__ x);
+ int scale = 0;
+
+ if (absx < absy)
+ {
+ long double t = absx;
+ absx = absy;
+ absy = t;
+ }
+
+ if (absx > LDBL_MAX / 2.0L)
+ {
+ scale = -1;
+ absx = __scalbnl (absx, scale);
+ absy = (absy >= LDBL_MIN * 2.0L ? __scalbnl (absy, scale) : 0.0L);
+ }
+ else if (absx < LDBL_MIN && absy < LDBL_MIN)
+ {
+ scale = LDBL_MANT_DIG;
+ absx = __scalbnl (absx, scale);
+ absy = __scalbnl (absy, scale);
+ }
+
+ if (absx == 1.0L && scale == 0)
+ {
+ __real__ result = __log1pl (absy * absy) * (M_LOG10El / 2.0L);
+ math_check_force_underflow_nonneg (__real__ result);
+ }
+ else if (absx > 1.0L && absx < 2.0L && absy < 1.0L && scale == 0)
+ {
+ long double d2m1 = (absx - 1.0L) * (absx + 1.0L);
+ if (absy >= LDBL_EPSILON)
+ d2m1 += absy * absy;
+ __real__ result = __log1pl (d2m1) * (M_LOG10El / 2.0L);
+ }
+ else if (absx < 1.0L
+ && absx >= 0.5L
+ && absy < LDBL_EPSILON / 2.0L
+ && scale == 0)
+ {
+ long double d2m1 = (absx - 1.0L) * (absx + 1.0L);
+ __real__ result = __log1pl (d2m1) * (M_LOG10El / 2.0L);
+ }
+ else if (absx < 1.0L
+ && absx >= 0.5L
+ && scale == 0
+ && absx * absx + absy * absy >= 0.5L)
+ {
+ long double d2m1 = __x2y2m1l (absx, absy);
+ __real__ result = __log1pl (d2m1) * (M_LOG10El / 2.0L);
+ }
+ else
+ {
+ long double d = __ieee754_hypotl (absx, absy);
+ __real__ result = __ieee754_log10l (d) - scale * M_LOG10_2l;
+ }
+
+ __imag__ result = M_LOG10El * __ieee754_atan2l (__imag__ x, __real__ x);
+ }
+ else
+ {
+ __imag__ result = __nanl ("");
+ if (rcls == FP_INFINITE || icls == FP_INFINITE)
+ /* Real or imaginary part is infinite. */
+ __real__ result = HUGE_VALL;
+ else
+ __real__ result = __nanl ("");
+ }
+
+ return result;
+}
+weak_alias (__clog10l, clog10l)