pmt: initial 3.0.2 update

include/libgnulib/signed-snan.h

@@ -0,0 +1,150 @@
+/* Macros for signalling not-a-number.
+   Copyright (C) 2023-2024 Free Software Foundation, Inc.
+
+   This file 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.
+
+   This file 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 this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _SIGNED_SNAN_H
+#define _SIGNED_SNAN_H
+
+#include "signed-nan.h"
+#include "snan.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+#if HAVE_SNANF
+
+/* Returns a signalling 'float' NaN with sign bit == 0 in memory.  */
+_GL_UNUSED static memory_float
+memory_positive_SNaNf ()
+{
+  return construct_memory_SNaNf (positive_NaNf ());
+}
+
+/* Returns a signalling 'float' NaN with sign bit == 1 in memory.  */
+_GL_UNUSED static memory_float
+memory_negative_SNaNf ()
+{
+  return construct_memory_SNaNf (negative_NaNf ());
+}
+
+/* Note: On 32-bit x86 processors, as well as on x86_64 processors with
+   CC="gcc -mfpmath=387", the following functions may return a quiet NaN
+   instead.  Use the functions with 'memory_' prefix if you need to avoid this.
+   See <https://lists.gnu.org/archive/html/bug-gnulib/2023-10/msg00060.html>
+   for details.  */
+
+/* Returns a signalling 'float' NaN with sign bit == 0.  */
+_GL_UNUSED static float
+positive_SNaNf ()
+{
+  return memory_positive_SNaNf ().value;
+}
+
+/* Returns a signalling 'float' NaN with sign bit == 1.  */
+_GL_UNUSED static float
+negative_SNaNf ()
+{
+  return memory_negative_SNaNf ().value;
+}
+
+#endif
+
+
+#if HAVE_SNAND
+
+/* Returns a signalling 'double' NaN with sign bit == 0 in memory.  */
+_GL_UNUSED static memory_double
+memory_positive_SNaNd ()
+{
+  return construct_memory_SNaNd (positive_NaNd ());
+}
+
+/* Returns a signalling 'double' NaN with sign bit == 1 in memory.  */
+_GL_UNUSED static memory_double
+memory_negative_SNaNd ()
+{
+  return construct_memory_SNaNd (negative_NaNd ());
+}
+
+/* Note: On 32-bit x86 processors, as well as on x86_64 processors with
+   CC="gcc -mfpmath=387", the following functions may return a quiet NaN
+   instead.  Use the functions with 'memory_' prefix if you need to avoid this.
+   See <https://lists.gnu.org/archive/html/bug-gnulib/2023-10/msg00060.html>
+   for details.  */
+
+/* Returns a signalling 'double' NaN with sign bit == 0.  */
+_GL_UNUSED static double
+positive_SNaNd ()
+{
+  return memory_positive_SNaNd ().value;
+}
+
+/* Returns a signalling 'double' NaN with sign bit == 1.  */
+_GL_UNUSED static double
+negative_SNaNd ()
+{
+  return memory_negative_SNaNd ().value;
+}
+
+#endif
+
+
+#if HAVE_SNANL
+
+/* Returns a signalling 'long double' NaN with sign bit == 0 in memory.  */
+_GL_UNUSED static memory_long_double
+memory_positive_SNaNl ()
+{
+  return construct_memory_SNaNl (positive_NaNl ());
+}
+
+/* Returns a signalling 'long double' NaN with sign bit == 1 in memory.  */
+_GL_UNUSED static memory_long_double
+memory_negative_SNaNl ()
+{
+  return construct_memory_SNaNl (negative_NaNl ());
+}
+
+/* Note: On 32-bit x86 processors, as well as on x86_64 processors with
+   CC="gcc -mfpmath=387", if HAVE_SAME_LONG_DOUBLE_AS_DOUBLE is 1, the
+   following functions may return a quiet NaN instead.  Use the functions
+   with 'memory_' prefix if you need to avoid this.  See
+   <https://lists.gnu.org/archive/html/bug-gnulib/2023-10/msg00060.html>
+   for details.  */
+
+/* Returns a signalling 'long double' NaN with sign bit == 0.  */
+_GL_UNUSED static long double
+positive_SNaNl ()
+{
+  return memory_positive_SNaNl ().value;
+}
+
+/* Returns a signalling 'long double' NaN with sign bit == 1.  */
+_GL_UNUSED static long double
+negative_SNaNl ()
+{
+  return memory_negative_SNaNl ().value;
+}
+
+#endif
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _SIGNED_SNAN_H */