* lib/math.in.h (getpayloadl): New declaration.
* lib/getpayloadl.c: New file.
* m4/math_h.m4 (gl_MATH_H): Test whether getpayloadl is declared.
(gl_MATH_H_REQUIRE_DEFAULTS): Initialize GNULIB_GETPAYLOADL.
(gl_MATH_H_DEFAULTS): Initialize HAVE_GETPAYLOADL, REPLACE_GETPAYLOADL.
* modules/math (Makefile.am): Substitute GNULIB_GETPAYLOADL,
HAVE_GETPAYLOADL, REPLACE_GETPAYLOADL.
* modules/getpayloadl: New file.
* doc/posix-functions/getpayloadl.texi: Mention the new module and the
glibc bug.
+2024-04-17 Bruno Haible <bruno@clisp.org>
+
+ getpayloadl: New module.
+ * lib/math.in.h (getpayloadl): New declaration.
+ * lib/getpayloadl.c: New file.
+ * m4/math_h.m4 (gl_MATH_H): Test whether getpayloadl is declared.
+ (gl_MATH_H_REQUIRE_DEFAULTS): Initialize GNULIB_GETPAYLOADL.
+ (gl_MATH_H_DEFAULTS): Initialize HAVE_GETPAYLOADL, REPLACE_GETPAYLOADL.
+ * modules/math (Makefile.am): Substitute GNULIB_GETPAYLOADL,
+ HAVE_GETPAYLOADL, REPLACE_GETPAYLOADL.
+ * modules/getpayloadl: New file.
+ * doc/posix-functions/getpayloadl.texi: Mention the new module and the
+ glibc bug.
+
2024-04-17 Bruno Haible <bruno@clisp.org>
getpayloadf: Add tests.
@url{https://www.gnu.org/software/libc/manual/html_node/FP-Bit-Twiddling.html}.
@end ifnotinfo
-Gnulib module: ---
+Gnulib module: getpayloadl
Portability problems fixed by Gnulib:
@itemize
+@item
+This function is missing on all non-glibc platforms:
+glibc 2.24, macOS 11.1, FreeBSD 14.0, NetBSD 10.0, OpenBSD 6.7, Minix 3.1.8, AIX 7.1, HP-UX 11.31, IRIX 6.5, Solaris 11.4, Cygwin 2.9, mingw, MSVC 14, Android 9.0.
+@item
+This function returns a wrong result for non-NaN arguments on some platforms:
+@c https://sourceware.org/bugzilla/show_bug.cgi?id=26073
+glibc 2.31.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
-@item
-This function is missing on all non-glibc platforms:
-glibc 2.24, macOS 11.1, FreeBSD 14.0, NetBSD 10.0, OpenBSD 6.7, Minix 3.1.8, AIX 7.1, HP-UX 11.31, IRIX 6.5, Solaris 11.4, Cygwin 2.9, mingw, MSVC 14, Android 9.0.
@end itemize
--- /dev/null
+/* Extract the payload of a NaN 'long double'.
+ Copyright 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 3 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/>. */
+
+/* Written by Bruno Haible. */
+
+#include <config.h>
+
+/* Specification. */
+#include <math.h>
+
+#if HAVE_SAME_LONG_DOUBLE_AS_DOUBLE
+
+long double
+getpayloadl (const long double *value)
+{
+ return getpayload ((const double *) value);
+}
+
+#else
+
+# include <float.h>
+# include <stdint.h>
+
+# include "snan.h"
+
+/* 2^(LDBL_MANT_DIG-1). */
+# define TWO_LDBL_MANT_DIG \
+ ((long double) (1U << ((LDBL_MANT_DIG - 1) / 4)) \
+ * (long double) (1U << ((LDBL_MANT_DIG - 1 + 1) / 4)) \
+ * (long double) (1U << ((LDBL_MANT_DIG - 1 + 2) / 4)) \
+ * (long double) (1U << ((LDBL_MANT_DIG - 1 + 3) / 4)))
+
+long double
+getpayloadl (const long double *value)
+{
+ if (isnanl (*value))
+ {
+# if (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 106 || LDBL_MANT_DIG == 113) \
+ && defined LDBL_EXPBIT0_WORD && defined LDBL_EXPBIT0_BIT
+ memory_long_double x;
+ x.value = *value;
+# if LDBL_MANT_DIG == 64 /* on i386, x86_64, ia64, m68k */
+ int64_t payload;
+# if LDBL_EXPBIT0_WORD == 2 && LDBL_EXPBIT0_BIT == 0 /* on i386, x86_64, ia64 */
+ payload = ((uint64_t) (x.word[1] & 0x3FFFFFFFU) << 32) | x.word[0];
+# elif LDBL_EXPBIT0_WORD == 0 && LDBL_EXPBIT0_BIT == 16 /* on m68k */
+ payload = ((uint64_t) (x.word[1] & 0x3FFFFFFFU) << 32) | x.word[2];
+# else
+# error "Please port gnulib getpayloadl.c to your platform!"
+# endif
+ return payload;
+# endif
+# if LDBL_MANT_DIG == 106 /* on powerpc, powerpc64, powerpc64le */
+ int64_t payload;
+# if LDBL_EXPBIT0_BIT == 20
+ payload = ((uint64_t) (x.word[LDBL_EXPBIT0_WORD] & 0x0007FFFFU) << 32)
+ | x.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD == 0 ? 1 : -1)];
+# else
+# error "Please port gnulib getpayloadl.c to your platform!"
+# endif
+ return payload;
+# endif
+# if LDBL_MANT_DIG == 113 /* on alpha, arm64, loongarch64, mips64, riscv64, s390x, sparc64 */
+# if LDBL_EXPBIT0_BIT == 16
+ memory_long_double pl;
+ pl.value = TWO_LDBL_MANT_DIG;
+ pl.word[LDBL_EXPBIT0_WORD] |= x.word[LDBL_EXPBIT0_WORD] & 0x00007FFFU;
+ pl.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD == 0 ? 1 : -1)] =
+ x.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD == 0 ? 1 : -1)];
+ pl.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD == 0 ? 2 : -2)] =
+ x.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD == 0 ? 2 : -2)];
+ pl.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD == 0 ? 3 : -3)] =
+ x.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD == 0 ? 3 : -3)];
+ return pl.value - TWO_LDBL_MANT_DIG;
+# else
+# error "Please port gnulib getpayloadl.c to your platform!"
+# endif
+# endif
+# else
+# error "Please port gnulib getpayloadl.c to your platform!"
+# endif
+ }
+ else
+ return -1.0L;
+}
+
+#endif
# endif
#endif
+#if @GNULIB_GETPAYLOADL@
+# if @REPLACE_GETPAYLOADL@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef getpayloadl
+# define getpayloadl rpl_getpayloadl
+# endif
+_GL_FUNCDECL_RPL (getpayloadl, long double, (const long double *));
+_GL_CXXALIAS_RPL (getpayloadl, long double, (const long double *));
+# else
+# if !@HAVE_GETPAYLOADL@
+_GL_FUNCDECL_SYS (getpayloadl, long double, (const long double *));
+# endif
+_GL_CXXALIAS_SYS (getpayloadl, long double, (const long double *));
+# endif
+_GL_CXXALIASWARN (getpayloadl);
+#elif defined GNULIB_POSIXCHECK
+# undef getpayloadl
+# if HAVE_RAW_DECL_GETPAYLOADL
+_GL_WARN_ON_USE (getpayloadl, "getpayloadl is unportable - "
+ "use gnulib module getpayloadl for portability");
+# endif
+#endif
+
#if @GNULIB_SETPAYLOADF@
# if !@HAVE_SETPAYLOADF@
# math_h.m4
-# serial 134
+# serial 135
dnl Copyright (C) 2007-2024 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
expf expl exp2 exp2f exp2l expm1 expm1f expm1l
fabsf fabsl floorf floorl fma fmaf fmal
fmod fmodf fmodl frexpf frexpl
- getpayload getpayloadf
+ getpayload getpayloadf getpayloadl
hypotf hypotl
ilogb ilogbf ilogbl
ldexpf ldexpl
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_FREXPL])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETPAYLOAD])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETPAYLOADF])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETPAYLOADL])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_HYPOT])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_HYPOTF])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_HYPOTL])
HAVE_FREXPF=1; AC_SUBST([HAVE_FREXPF])
HAVE_GETPAYLOAD=1; AC_SUBST([HAVE_GETPAYLOAD])
HAVE_GETPAYLOADF=1; AC_SUBST([HAVE_GETPAYLOADF])
+ HAVE_GETPAYLOADL=1; AC_SUBST([HAVE_GETPAYLOADL])
HAVE_HYPOTF=1; AC_SUBST([HAVE_HYPOTF])
HAVE_HYPOTL=1; AC_SUBST([HAVE_HYPOTL])
HAVE_ILOGB=1; AC_SUBST([HAVE_ILOGB])
REPLACE_FREXPL=0; AC_SUBST([REPLACE_FREXPL])
REPLACE_GETPAYLOAD=0; AC_SUBST([REPLACE_GETPAYLOAD])
REPLACE_GETPAYLOADF=0; AC_SUBST([REPLACE_GETPAYLOADF])
+ REPLACE_GETPAYLOADL=0; AC_SUBST([REPLACE_GETPAYLOADL])
REPLACE_HUGE_VAL=0; AC_SUBST([REPLACE_HUGE_VAL])
REPLACE_HYPOT=0; AC_SUBST([REPLACE_HYPOT])
REPLACE_HYPOTF=0; AC_SUBST([REPLACE_HYPOTF])
--- /dev/null
+Description:
+getpayloadl function: extract the payload of a NaN
+
+Files:
+lib/getpayloadl.c
+m4/mathfunc.m4
+m4/getpayload.m4
+m4/exponentl.m4
+
+Depends-on:
+math
+extensions
+getpayload [{ test $HAVE_GETPAYLOADL = 0 || test $REPLACE_GETPAYLOADL = 1; } && test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1]
+float [{ test $HAVE_GETPAYLOADL = 0 || test $REPLACE_GETPAYLOADL = 1; } && test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 0]
+stdint [{ test $HAVE_GETPAYLOADL = 0 || test $REPLACE_GETPAYLOADL = 1; } && test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 0]
+isnanl [{ test $HAVE_GETPAYLOADL = 0 || test $REPLACE_GETPAYLOADL = 1; } && test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 0]
+snan [{ test $HAVE_GETPAYLOADL = 0 || test $REPLACE_GETPAYLOADL = 1; } && test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 0]
+
+configure.ac:
+gl_FUNC_GETPAYLOADL
+gl_CONDITIONAL([GL_COND_OBJ_GETPAYLOADL],
+ [test $HAVE_GETPAYLOADL = 0 || test $REPLACE_GETPAYLOADL = 1])
+gl_MATH_MODULE_INDICATOR([getpayloadl])
+
+Makefile.am:
+if GL_COND_OBJ_GETPAYLOADL
+lib_SOURCES += getpayloadl.c
+endif
+
+Include:
+<math.h>
+
+Link:
+$(GETPAYLOADL_LIBM)
+
+License:
+LGPL
+
+Maintainer:
+all
-e 's/@''GNULIB_FREXPL''@/$(GNULIB_FREXPL)/g' \
-e 's/@''GNULIB_GETPAYLOAD''@/$(GNULIB_GETPAYLOAD)/g' \
-e 's/@''GNULIB_GETPAYLOADF''@/$(GNULIB_GETPAYLOADF)/g' \
+ -e 's/@''GNULIB_GETPAYLOADL''@/$(GNULIB_GETPAYLOADL)/g' \
-e 's/@''GNULIB_HYPOT''@/$(GNULIB_HYPOT)/g' \
-e 's/@''GNULIB_HYPOTF''@/$(GNULIB_HYPOTF)/g' \
-e 's/@''GNULIB_HYPOTL''@/$(GNULIB_HYPOTL)/g' \
-e 's|@''HAVE_FREXPF''@|$(HAVE_FREXPF)|g' \
-e 's|@''HAVE_GETPAYLOAD''@|$(HAVE_GETPAYLOAD)|g' \
-e 's|@''HAVE_GETPAYLOADF''@|$(HAVE_GETPAYLOADF)|g' \
+ -e 's|@''HAVE_GETPAYLOADL''@|$(HAVE_GETPAYLOADL)|g' \
-e 's|@''HAVE_HYPOTF''@|$(HAVE_HYPOTF)|g' \
-e 's|@''HAVE_HYPOTL''@|$(HAVE_HYPOTL)|g' \
-e 's|@''HAVE_ILOGB''@|$(HAVE_ILOGB)|g' \
-e 's|@''REPLACE_FREXPL''@|$(REPLACE_FREXPL)|g' \
-e 's|@''REPLACE_GETPAYLOAD''@|$(REPLACE_GETPAYLOAD)|g' \
-e 's|@''REPLACE_GETPAYLOADF''@|$(REPLACE_GETPAYLOADF)|g' \
+ -e 's|@''REPLACE_GETPAYLOADL''@|$(REPLACE_GETPAYLOADL)|g' \
-e 's|@''REPLACE_HUGE_VAL''@|$(REPLACE_HUGE_VAL)|g' \
-e 's|@''REPLACE_HYPOT''@|$(REPLACE_HYPOT)|g' \
-e 's|@''REPLACE_HYPOTF''@|$(REPLACE_HYPOTF)|g' \