Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 128 insertions, 0 deletions

diff --git a/REORG.TODO/math/s_clog10_template.c b/REORG.TODO/math/s_clog10_template.c
new file mode 100644
index 0000000000..30d87b5a8a
--- /dev/null
+++ b/REORG.TODO/math/s_clog10_template.c
@@ -0,0 +1,128 @@
+/* Compute complex base 10 logarithm.
+   Copyright (C) 1997-2017 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 LOG10_2 M_LIT (0.3010299956639811952137388947244930267682)
+
+/* pi * log10 (e).  */
+#define PI_LOG10E M_LIT (1.364376353841841347485783625431355770210)
+
+CFLOAT
+M_DECL_FUNC (__clog10) (CFLOAT x)
+{
+  CFLOAT 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) ? PI_LOG10E : 0;
+      __imag__ result = M_COPYSIGN (__imag__ result, __imag__ x);
+      /* Yes, the following line raises an exception.  */
+      __real__ result = -1 / M_FABS (__real__ x);
+    }
+  else if (__glibc_likely (rcls != FP_NAN && icls != FP_NAN))
+    {
+      /* Neither real nor imaginary part is NaN.  */
+      FLOAT absx = M_FABS (__real__ x), absy = M_FABS (__imag__ x);
+      int scale = 0;
+
+      if (absx < absy)
+	{
+	  FLOAT t = absx;
+	  absx = absy;
+	  absy = t;
+	}
+
+      if (absx > M_MAX / 2)
+	{
+	  scale = -1;
+	  absx = M_SCALBN (absx, scale);
+	  absy = (absy >= M_MIN * 2 ? M_SCALBN (absy, scale) : 0);
+	}
+      else if (absx < M_MIN && absy < M_MIN)
+	{
+	  scale = M_MANT_DIG;
+	  absx = M_SCALBN (absx, scale);
+	  absy = M_SCALBN (absy, scale);
+	}
+
+      if (absx == 1 && scale == 0)
+	{
+	  __real__ result = (M_LOG1P (absy * absy)
+			     * ((FLOAT) M_MLIT (M_LOG10E) / 2));
+	  math_check_force_underflow_nonneg (__real__ result);
+	}
+      else if (absx > 1 && absx < 2 && absy < 1 && scale == 0)
+	{
+	  FLOAT d2m1 = (absx - 1) * (absx + 1);
+	  if (absy >= M_EPSILON)
+	    d2m1 += absy * absy;
+	  __real__ result = M_LOG1P (d2m1) * ((FLOAT) M_MLIT (M_LOG10E) / 2);
+	}
+      else if (absx < 1
+	       && absx >= M_LIT (0.5)
+	       && absy < M_EPSILON / 2
+	       && scale == 0)
+	{
+	  FLOAT d2m1 = (absx - 1) * (absx + 1);
+	  __real__ result = M_LOG1P (d2m1) * ((FLOAT) M_MLIT (M_LOG10E) / 2);
+	}
+      else if (absx < 1
+	       && absx >= M_LIT (0.5)
+	       && scale == 0
+	       && absx * absx + absy * absy >= M_LIT (0.5))
+	{
+	  FLOAT d2m1 = M_SUF (__x2y2m1) (absx, absy);
+	  __real__ result = M_LOG1P (d2m1) * ((FLOAT) M_MLIT (M_LOG10E) / 2);
+	}
+      else
+	{
+	  FLOAT d = M_HYPOT (absx, absy);
+	  __real__ result = M_SUF (__ieee754_log10) (d) - scale * LOG10_2;
+	}
+
+      __imag__ result = M_MLIT (M_LOG10E) * M_ATAN2 (__imag__ x, __real__ x);
+    }
+  else
+    {
+      __imag__ result = M_NAN;
+      if (rcls == FP_INFINITE || icls == FP_INFINITE)
+	/* Real or imaginary part is infinite.  */
+	__real__ result = M_HUGE_VAL;
+      else
+	__real__ result = M_NAN;
+    }
+
+  return result;
+}
+
+declare_mgen_alias (__clog10, clog10)
+
+#if M_LIBM_NEED_COMPAT (clog10)
+/* __clog10 is also a public symbol.  */
+declare_mgen_libm_compat (__clog10, __clog10)
+declare_mgen_libm_compat (clog10, clog10)
+#endif