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, 69 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/powerpc/fpu/s_sinf.c b/REORG.TODO/sysdeps/powerpc/fpu/s_sinf.c
new file mode 100644
index 0000000000..54a428e68a
--- /dev/null
+++ b/REORG.TODO/sysdeps/powerpc/fpu/s_sinf.c
@@ -0,0 +1,69 @@
+/* s_sinf.c -- float version of s_sin.c.
+   Copyright (C) 2011-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Adhemerval Zanella <azanella@br.ibm.com>, 2011
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <math.h>
+#include <math_private.h>
+
+static const float pio4 = 7.8539801e-1;
+
+float
+__sinf (float x)
+{
+  float y[2], z = 0.0;
+  float ix;
+  int32_t n;
+
+  ix = __builtin_fabsf (x);
+
+  /* |x| ~< pi/4 */
+  if (ix <= pio4)
+    {
+      return __kernel_sinf (x, z, 0);
+      /* sin(Inf or NaN) is NaN */
+    }
+  else if (isnanf (ix))
+    {
+      return x - x;
+    }
+  else if (isinff (ix))
+    {
+      __set_errno (EDOM);
+      return x - x;
+    }
+
+  /* argument reduction needed */
+  else
+    {
+      n = __ieee754_rem_pio2f (x, y);
+      switch (n & 3)
+	{
+	case 0:
+	  return __kernel_sinf (y[0], y[1], 1);
+	case 1:
+	  return __kernel_cosf (y[0], y[1]);
+	case 2:
+	  return -__kernel_sinf (y[0], y[1], 1);
+	default:
+	  return -__kernel_cosf (y[0], y[1]);
+	}
+    }
+}
+
+weak_alias (__sinf, sinf)