2.5-18.1

1 files changed, 111 insertions, 0 deletions

diff --git a/sysdeps/ieee754/ldbl-128ibm/s_remquol.c b/sysdeps/ieee754/ldbl-128ibm/s_remquol.c
new file mode 100644
index 0000000000..ca504a01a0
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm/s_remquol.c
@@ -0,0 +1,111 @@
+/* Compute remainder and a congruent to the quotient.
+   Copyright (C) 1997,1999,2002,2004,2006 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997 and
+		  Jakub Jelinek <jj@ultra.linux.cz>, 1999.
+
+   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 "math_private.h"
+#include <math_ldbl_opt.h>
+
+
+static const long double zero = 0.0;
+
+
+long double
+__remquol (long double x, long double y, int *quo)
+{
+  int64_t hx,hy;
+  u_int64_t sx,lx,ly,qs;
+  int cquo;
+
+  GET_LDOUBLE_WORDS64 (hx, lx, x);
+  GET_LDOUBLE_WORDS64 (hy, ly, y);
+  sx = hx & 0x8000000000000000ULL;
+  qs = sx ^ (hy & 0x8000000000000000ULL);
+  hy &= 0x7fffffffffffffffLL;
+  hx &= 0x7fffffffffffffffLL;
+
+  /* Purge off exception values.  */
+  if ((hy | (ly & 0x7fffffffffffffff)) == 0)
+    return (x * y) / (x * y); 			/* y = 0 */
+  if ((hx >= 0x7ff0000000000000LL)		/* x not finite */
+      || ((hy >= 0x7ff0000000000000LL)		/* y is NaN */
+	  && (((hy - 0x7ff0000000000000LL) | ly) != 0)))
+    return (x * y) / (x * y);
+
+  if (hy <= 0x7fbfffffffffffffLL)
+    x = __ieee754_fmodl (x, 8 * y);              /* now x < 8y */
+
+  if (((hx - hy) | (lx - ly)) == 0)
+    {
+      *quo = qs ? -1 : 1;
+      return zero * x;
+    }
+
+  x  = fabsl (x);
+  y  = fabsl (y);
+  cquo = 0;
+
+  if (x >= 4 * y)
+    {
+      x -= 4 * y;
+      cquo += 4;
+    }
+  if (x >= 2 * y)
+    {
+      x -= 2 * y;
+      cquo += 2;
+    }
+
+  if (hy < 0x0020000000000000LL)
+    {
+      if (x + x > y)
+	{
+	  x -= y;
+	  ++cquo;
+	  if (x + x >= y)
+	    {
+	      x -= y;
+	      ++cquo;
+	    }
+	}
+    }
+  else
+    {
+      long double y_half = 0.5L * y;
+      if (x > y_half)
+	{
+	  x -= y;
+	  ++cquo;
+	  if (x >= y_half)
+	    {
+	      x -= y;
+	      ++cquo;
+	    }
+	}
+    }
+
+  *quo = qs ? -cquo : cquo;
+
+  if (sx)
+    x = -x;
+  return x;
+}
+long_double_symbol (libm, __remquol, remquol);