newlib: update

git-svn-id: svn://kolibrios.org@1906 a494cfbc-eb01-0410-851d-a64ba20cac60
2011-03-11 18:52:24 +00:00
parent a316fa7c9d
commit 2336060a0c
297 changed files with 26930 additions and 2094 deletions
@@ -0,0 +1,70 @@
+/* Round float to integer away from zero.
+   Copyright (C) 1997 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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <math.h>
+#include "fdlibm.h"
+
+
+static const float huge = 1.0e30;
+
+
+float roundf (float x)
+{
+  int i0, j0;
+
+  GET_FLOAT_WORD (i0, x);
+  j0 = ((i0 >> 23) & 0xff) - 0x7f;
+  if (j0 < 23)
+    {
+      if (j0 < 0)
+	{
+	  if (huge + x > 0.0F)
+	    {
+	      i0 &= 0x80000000;
+	      if (j0 == -1)
+		i0 |= 0x3f800000;
+	    }
+	}
+      else
+	{
+	  unsigned int i = 0x007fffff >> j0;
+	  if ((i0 & i) == 0)
+	    /* X is integral.  */
+	    return x;
+	  if (huge + x > 0.0F)
+	    {
+	      /* Raise inexact if x != 0.  */
+	      i0 += 0x00400000 >> j0;
+	      i0 &= ~i;
+	    }
+	}
+    }
+  else
+    {
+      if (j0 == 0x80)
+	/* Inf or NaN.  */
+	return x + x;
+      else
+	return x;
+    }
+
+  SET_FLOAT_WORD (x, i0);
+  return x;
+}