From 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 Mon Sep 17 00:00:00 2001
From: Zack Weinberg <zackw@panix.com>
Date: Thu, 8 Jun 2017 15:39:03 -0400
Subject: Prepare for radical source tree reorganization.

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).
---
 REORG.TODO/sysdeps/ieee754/ldbl-128/s_remquol.c | 112 ++++++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 REORG.TODO/sysdeps/ieee754/ldbl-128/s_remquol.c

(limited to 'REORG.TODO/sysdeps/ieee754/ldbl-128/s_remquol.c')

diff --git a/REORG.TODO/sysdeps/ieee754/ldbl-128/s_remquol.c b/REORG.TODO/sysdeps/ieee754/ldbl-128/s_remquol.c
new file mode 100644
index 0000000000..d360f82dba
--- /dev/null
+++ b/REORG.TODO/sysdeps/ieee754/ldbl-128/s_remquol.c
@@ -0,0 +1,112 @@
+/* Compute remainder and a congruent to the quotient.
+   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 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <math.h>
+
+#include <math_private.h>
+
+
+static const _Float128 zero = 0.0;
+
+
+_Float128
+__remquol (_Float128 x, _Float128 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) == 0)
+    return (x * y) / (x * y); 			/* y = 0 */
+  if ((hx >= 0x7fff000000000000LL)		/* x not finite */
+      || ((hy >= 0x7fff000000000000LL)		/* y is NaN */
+	  && (((hy - 0x7fff000000000000LL) | ly) != 0)))
+    return (x * y) / (x * y);
+
+  if (hy <= 0x7ffbffffffffffffLL)
+    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 (hy <= 0x7ffcffffffffffffLL && x >= 4 * y)
+    {
+      x -= 4 * y;
+      cquo += 4;
+    }
+  if (hy <= 0x7ffdffffffffffffLL && x >= 2 * y)
+    {
+      x -= 2 * y;
+      cquo += 2;
+    }
+
+  if (hy < 0x0002000000000000LL)
+    {
+      if (x + x > y)
+	{
+	  x -= y;
+	  ++cquo;
+	  if (x + x >= y)
+	    {
+	      x -= y;
+	      ++cquo;
+	    }
+	}
+    }
+  else
+    {
+      _Float128 y_half = L(0.5) * y;
+      if (x > y_half)
+	{
+	  x -= y;
+	  ++cquo;
+	  if (x >= y_half)
+	    {
+	      x -= y;
+	      ++cquo;
+	    }
+	}
+    }
+
+  *quo = qs ? -cquo : cquo;
+
+  /* Ensure correct sign of zero result in round-downward mode.  */
+  if (x == 0)
+    x = 0;
+  if (sx)
+    x = -x;
+  return x;
+}
+weak_alias (__remquol, remquol)
-- 
cgit 1.4.1