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, 72 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/powerpc/powerpc32/fpu/s_llroundf.c b/REORG.TODO/sysdeps/powerpc/powerpc32/fpu/s_llroundf.c
new file mode 100644
index 0000000000..55452bac73
--- /dev/null
+++ b/REORG.TODO/sysdeps/powerpc/powerpc32/fpu/s_llroundf.c
@@ -0,0 +1,72 @@
+/* Round float value to long long int.
+   Copyright (C) 1997-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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 <math.h>
+#include <math_private.h>
+#include <stdint.h>
+
+/* Round to the nearest integer, with values exactly on a 0.5 boundary
+   rounded away from zero, regardless of the current rounding mode.
+   If (long long)x, when x is out of range of a long long, clips at
+   LLONG_MAX or LLONG_MIN, then this implementation also clips.  */
+
+long long int
+__llroundf (float x)
+{
+  long long xr;
+  if (HAVE_PPC_FCTIDZ)
+    xr = (long long) x;
+  else
+    {
+      float ax = fabsf (x);
+      /* Avoid incorrect exceptions from libgcc conversions (as of GCC
+	 5): <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59412>.  */
+      if (ax < 0x1p31f)
+	xr = (long long int) (long int) x;
+      else if (!(ax < 0x1p55f))
+	xr = (long long int) (long int) (x * 0x1p-32f) << 32;
+      else
+	{
+	  uint32_t i0;
+	  GET_FLOAT_WORD (i0, x);
+	  int exponent = ((i0 >> 23) & 0xff) - 0x7f;
+	  unsigned long long int mant = (i0 & 0x7fffff) | 0x800000;
+	  mant <<= exponent - 23;
+	  xr = (long long int) ((i0 & 0x80000000) != 0 ? -mant : mant);
+	}
+    }
+  /* Avoid spurious "inexact" converting LLONG_MAX to float, and from
+     subtraction when the result is out of range, by returning early
+     for arguments large enough that no rounding is needed.  */
+  if (!(fabsf (x) < 0x1p23f))
+    return xr;
+  float xrf = (float) xr;
+
+  if (x >= 0.0)
+    {
+      if (x - xrf >= 0.5)
+	xr += (long long) ((unsigned long long) xr + 1) > 0;
+    }
+  else
+    {
+      if (xrf - x >= 0.5)
+	xr -= (long long) ((unsigned long long) xr - 1) < 0;
+    }
+  return xr;
+}
+weak_alias (__llroundf, llroundf)