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+/* auxiliary data to generate special IEEE floats (NaN, +Inf, -Inf)
+
+Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
+Contributed by the AriC and Caramel projects, INRIA.
+
+This file is part of the GNU MPFR Library.
+
+The GNU MPFR 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 3 of the License, or (at your
+option) any later version.
+
+The GNU MPFR 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 MPFR Library; see the file COPYING.LESSER. If not, see
+http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
+51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+/* "double" NaN and infinities are written as explicit bytes to be sure of
+ getting what we want, and to be sure of not depending on libm.
+
+ Could use 4-byte "float" values and let the code convert them, but it
+ seems more direct to give exactly what we want. Certainly for gcc 3.0.2
+ on alphaev56-unknown-freebsd4.3 the NaN must be 8-bytes, since that
+ compiler+system was seen incorrectly converting from a "float" NaN. */
+
+#if _GMP_IEEE_FLOATS
+
+/* The "d" field guarantees alignment to a suitable boundary for a double.
+ Could use a union instead, if we checked the compiler supports union
+ initializers. */
+union dbl_bytes {
+ unsigned char b[8];
+ double d;
+};
+
+#define MPFR_DBL_INFP (dbl_infp.d)
+#define MPFR_DBL_INFM (dbl_infm.d)
+#define MPFR_DBL_NAN (dbl_nan.d)
+
+/* Warning! dbl_nan.d is not consistently the same NaN on all the
+ processors: it can be either a qNaN (quiet) or sNaN (signaling).
+ Processors are known to differ... */
+
+#if HAVE_DOUBLE_IEEE_LITTLE_ENDIAN
+static const union dbl_bytes dbl_infp =
+ { { 0, 0, 0, 0, 0, 0, 0xF0, 0x7F } };
+static const union dbl_bytes dbl_infm =
+ { { 0, 0, 0, 0, 0, 0, 0xF0, 0xFF } };
+static const union dbl_bytes dbl_nan =
+ { { 0, 0, 0, 0, 0, 0, 0xF8, 0x7F } };
+#endif
+#if HAVE_DOUBLE_IEEE_LITTLE_SWAPPED
+static const union dbl_bytes dbl_infp =
+ { { 0, 0, 0xF0, 0x7F, 0, 0, 0, 0 } };
+static const union dbl_bytes dbl_infm =
+ { { 0, 0, 0xF0, 0xFF, 0, 0, 0, 0 } };
+static const union dbl_bytes dbl_nan =
+ { { 0, 0, 0xF8, 0x7F, 0, 0, 0, 0 } };
+#endif
+#if HAVE_DOUBLE_IEEE_BIG_ENDIAN
+static const union dbl_bytes dbl_infp =
+ { { 0x7F, 0xF0, 0, 0, 0, 0, 0, 0 } };
+static const union dbl_bytes dbl_infm =
+ { { 0xFF, 0xF0, 0, 0, 0, 0, 0, 0 } };
+static const union dbl_bytes dbl_nan =
+ { { 0x7F, 0xF8, 0, 0, 0, 0, 0, 0 } };
+#endif
+
+#else /* _GMP_IEEE_FLOATS */
+
+#define MPFR_DBL_INFP DBL_POS_INF
+#define MPFR_DBL_INFM DBL_NEG_INF
+#define MPFR_DBL_NAN DBL_NAN
+
+#endif /* _GMP_IEEE_FLOATS */