[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/libc/glibc/glibc-2.22/math/s_clog10f.c b/ap/libc/glibc/glibc-2.22/math/s_clog10f.c
new file mode 100644
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+++ b/ap/libc/glibc/glibc-2.22/math/s_clog10f.c
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+/* Compute complex base 10 logarithm.
+ Copyright (C) 1997-2015 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>
+
+/* log_10 (2). */
+#define M_LOG10_2f 0.3010299956639811952137388947244930267682f
+
+/* pi * log10 (e). */
+#define M_PI_LOG10Ef 1.364376353841841347485783625431355770210f
+
+__complex__ float
+__clog10f (__complex__ float x)
+{
+ __complex__ float 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_LOG10Ef : 0.0;
+ __imag__ result = __copysignf (__imag__ result, __imag__ x);
+ /* Yes, the following line raises an exception. */
+ __real__ result = -1.0 / fabsf (__real__ x);
+ }
+ else if (__glibc_likely (rcls != FP_NAN && icls != FP_NAN))
+ {
+ /* Neither real nor imaginary part is NaN. */
+ float absx = fabsf (__real__ x), absy = fabsf (__imag__ x);
+ int scale = 0;
+
+ if (absx < absy)
+ {
+ float t = absx;
+ absx = absy;
+ absy = t;
+ }
+
+ if (absx > FLT_MAX / 2.0f)
+ {
+ scale = -1;
+ absx = __scalbnf (absx, scale);
+ absy = (absy >= FLT_MIN * 2.0f ? __scalbnf (absy, scale) : 0.0f);
+ }
+ else if (absx < FLT_MIN && absy < FLT_MIN)
+ {
+ scale = FLT_MANT_DIG;
+ absx = __scalbnf (absx, scale);
+ absy = __scalbnf (absy, scale);
+ }
+
+ if (absx == 1.0f && scale == 0)
+ {
+ float absy2 = absy * absy;
+ if (absy2 <= FLT_MIN * 2.0f * (float) M_LN10)
+ {
+ float force_underflow = absy2 * absy2;
+ __real__ result = absy2 * ((float) M_LOG10E / 2.0f);
+ math_force_eval (force_underflow);
+ }
+ else
+ __real__ result = __log1pf (absy2) * ((float) M_LOG10E / 2.0f);
+ }
+ else if (absx > 1.0f && absx < 2.0f && absy < 1.0f && scale == 0)
+ {
+ float d2m1 = (absx - 1.0f) * (absx + 1.0f);
+ if (absy >= FLT_EPSILON)
+ d2m1 += absy * absy;
+ __real__ result = __log1pf (d2m1) * ((float) M_LOG10E / 2.0f);
+ }
+ else if (absx < 1.0f
+ && absx >= 0.75f
+ && absy < FLT_EPSILON / 2.0f
+ && scale == 0)
+ {
+ float d2m1 = (absx - 1.0f) * (absx + 1.0f);
+ __real__ result = __log1pf (d2m1) * ((float) M_LOG10E / 2.0f);
+ }
+ else if (absx < 1.0f && (absx >= 0.75f || absy >= 0.5f) && scale == 0)
+ {
+ float d2m1 = __x2y2m1f (absx, absy);
+ __real__ result = __log1pf (d2m1) * ((float) M_LOG10E / 2.0f);
+ }
+ else
+ {
+ float d = __ieee754_hypotf (absx, absy);
+ __real__ result = __ieee754_log10f (d) - scale * M_LOG10_2f;
+ }
+
+ __imag__ result = M_LOG10E * __ieee754_atan2f (__imag__ x, __real__ x);
+ }
+ else
+ {
+ __imag__ result = __nanf ("");
+ if (rcls == FP_INFINITE || icls == FP_INFINITE)
+ /* Real or imaginary part is infinite. */
+ __real__ result = HUGE_VALF;
+ else
+ __real__ result = __nanf ("");
+ }
+
+ return result;
+}
+#ifndef __clog10f
+weak_alias (__clog10f, clog10f)
+#endif