1 files changed, 65 insertions, 0 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_totalordermagl.c b/sysdeps/ieee754/ldbl-128ibm/s_totalordermagl.c
new file mode 100644
index 0000000000..d8027ffbb0
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm/s_totalordermagl.c
@@ -0,0 +1,65 @@
+/* Total order operation on absolute values.  ldbl-128ibm 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 <nan-high-order-bit.h>
+#include <stdint.h>
+
+int
+__totalordermagl (long double x, long double y)
+{
+  double xhi, xlo, yhi, ylo;
+  int64_t hx, hy, lx, ly;
+
+  ldbl_unpack (x, &xhi, &xlo);
+  EXTRACT_WORDS64 (hx, xhi);
+  ldbl_unpack (y, &yhi, &ylo);
+  EXTRACT_WORDS64 (hy, yhi);
+#if HIGH_ORDER_BIT_IS_SET_FOR_SNAN
+# error not implemented
+#endif
+  uint64_t x_sign = hx & 0x8000000000000000ULL;
+  uint64_t y_sign = hy & 0x8000000000000000ULL;
+  hx ^= x_sign;
+  hy ^= y_sign;
+  if (hx < hy)
+    return 1;
+  else if (hx > hy)
+    return 0;
+
+  /* The high doubles are identical.  If they are NaNs or both the low
+     parts are zero, the low parts are not significant (and if they
+     are infinities, both the low parts must be zero).  */
+  if (hx >= 0x7ff0000000000000ULL)
+    return 1;
+  EXTRACT_WORDS64 (lx, xlo);
+  EXTRACT_WORDS64 (ly, ylo);
+  if (((lx | ly) & 0x7fffffffffffffffULL) == 0)
+    return 1;
+  lx ^= x_sign;
+  ly ^= y_sign;
+
+  /* Otherwise compare the low parts.  */
+  uint64_t lx_sign = lx >> 63;
+  uint64_t ly_sign = ly >> 63;
+  lx ^= lx_sign >> 1;
+  ly ^= ly_sign >> 1;
+  return lx <= ly;
+}
+weak_alias (__totalordermagl, totalordermagl)