1 files changed, 48 insertions, 0 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_totalordermag.c b/sysdeps/ieee754/dbl-64/s_totalordermag.c
new file mode 100644
index 0000000000..3b45113962
--- /dev/null
+++ b/sysdeps/ieee754/dbl-64/s_totalordermag.c
@@ -0,0 +1,48 @@
+/* Total order operation on absolute values.  dbl-64 version.
+   Copyright (C) 2016-2018 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 <libm-alias-double.h>
+#include <nan-high-order-bit.h>
+#include <stdint.h>
+
+int
+__totalordermag (double x, double y)
+{
+  uint32_t hx, hy;
+  uint32_t lx, ly;
+  EXTRACT_WORDS (hx, lx, x);
+  EXTRACT_WORDS (hy, ly, y);
+  hx &= 0x7fffffff;
+  hy &= 0x7fffffff;
+#if HIGH_ORDER_BIT_IS_SET_FOR_SNAN
+  /* For the preferred quiet NaN convention, this operation is a
+     comparison of the representations of the absolute values of the
+     arguments.  If both arguments are NaNs, invert the
+     quiet/signaling bit so comparing that way works.  */
+  if ((hx > 0x7ff00000 || (hx == 0x7ff00000 && lx != 0))
+      && (hy > 0x7ff00000 || (hy == 0x7ff00000 && ly != 0)))
+    {
+      hx ^= 0x00080000;
+      hy ^= 0x00080000;
+    }
+#endif
+  return hx < hy || (hx == hy && lx <= ly);
+}
+libm_alias_double (__totalordermag, totalordermag)