1 files changed, 60 insertions, 0 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_setpayloadl_main.c b/sysdeps/ieee754/ldbl-128ibm/s_setpayloadl_main.c
new file mode 100644
index 0000000000..e5b49d03a2
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm/s_setpayloadl_main.c
@@ -0,0 +1,60 @@
+/* Set NaN payload.  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>
+
+#define SET_HIGH_BIT (HIGH_ORDER_BIT_IS_SET_FOR_SNAN ? SIG : !SIG)
+#define BIAS 0x3ff
+#define PAYLOAD_DIG 51
+#define EXPLICIT_MANT_DIG 52
+
+int
+FUNC (long double *x, long double payload)
+{
+  double hi, lo;
+  uint64_t hx, lx;
+
+  ldbl_unpack (payload, &hi, &lo);
+  EXTRACT_WORDS64 (hx, hi);
+  EXTRACT_WORDS64 (lx, lo);
+  int exponent = hx >> EXPLICIT_MANT_DIG;
+  /* Test if argument is (a) negative or too large; (b) too small,
+     except for 0 when allowed; (c) not an integer.  All valid
+     arguments have the low part zero.  */
+  if ((lx & 0x7fffffffffffffffULL) != 0
+      || exponent >= BIAS + PAYLOAD_DIG
+      || (exponent < BIAS && !(SET_HIGH_BIT && hx == 0))
+      || (hx & ((1ULL << (BIAS + EXPLICIT_MANT_DIG - exponent)) - 1)) != 0)
+    {
+      *x = 0.0L;
+      return 1;
+    }
+  if (hx != 0)
+    {
+      hx &= (1ULL << EXPLICIT_MANT_DIG) - 1;
+      hx |= 1ULL << EXPLICIT_MANT_DIG;
+      hx >>= BIAS + EXPLICIT_MANT_DIG - exponent;
+    }
+  hx |= 0x7ff0000000000000ULL | (SET_HIGH_BIT ? 0x8000000000000ULL : 0);
+  INSERT_WORDS64 (hi, hx);
+  *x = ldbl_pack (hi, 0.0);
+  return 0;
+}