mirror of
https://https.git.savannah.gnu.org/git/gnulib.git
synced 2026-09-01 02:34:55 +00:00
totalordermag: New module.
* lib/math.in.h (totalordermag): New declaration. * lib/totalordermag.c: New file, based on lib/totalorder.c. * m4/totalordermag.m4: New file, based on m4/totalorder.m4. * m4/math_h.m4 (gl_MATH_H): Test whether totalordermag is declared. (gl_MATH_H_REQUIRE_DEFAULTS): Initialize GNULIB_TOTALORDERMAG. (gl_MATH_H_DEFAULTS): Initialize HAVE_TOTALORDERMAG, REPLACE_TOTALORDERMAG. * modules/math (Makefile.am): Substitute GNULIB_TOTALORDERMAG, HAVE_TOTALORDERMAG, REPLACE_TOTALORDERMAG. * modules/totalordermag: New file, based on modules/totalorder. * doc/posix-functions/totalordermag.texi: Mention the new module.
This commit is contained in:
Bruno Haible
@@ -1,3 +1,18 @@
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2024-04-18 Bruno Haible <bruno@clisp.org>
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totalordermag: New module.
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* lib/math.in.h (totalordermag): New declaration.
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* lib/totalordermag.c: New file, based on lib/totalorder.c.
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* m4/totalordermag.m4: New file, based on m4/totalorder.m4.
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* m4/math_h.m4 (gl_MATH_H): Test whether totalordermag is declared.
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(gl_MATH_H_REQUIRE_DEFAULTS): Initialize GNULIB_TOTALORDERMAG.
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(gl_MATH_H_DEFAULTS): Initialize HAVE_TOTALORDERMAG,
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REPLACE_TOTALORDERMAG.
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* modules/math (Makefile.am): Substitute GNULIB_TOTALORDERMAG,
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HAVE_TOTALORDERMAG, REPLACE_TOTALORDERMAG.
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* modules/totalordermag: New file, based on modules/totalorder.
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* doc/posix-functions/totalordermag.texi: Mention the new module.
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2024-04-18 Bruno Haible <bruno@clisp.org>
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setpayloadsig*: Support newer MIPS CPUs.
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@@ -10,14 +10,10 @@ Documentation:@*
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@url{https://www.gnu.org/software/libc/manual/html_node/FP-Comparison-Functions.html}.
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@end ifnotinfo
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Gnulib module: ---
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Gnulib module: totalordermag
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Portability problems fixed by Gnulib:
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@itemize
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@end itemize
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Portability problems not fixed by Gnulib:
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@itemize
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@item
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This function is missing on all non-glibc platforms:
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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.
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@@ -25,3 +21,7 @@ glibc 2.24, macOS 11.1, FreeBSD 14.0, NetBSD 10.0, OpenBSD 6.7, Minix 3.1.8, AIX
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This function has a different signature on some platforms:
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glibc 2.30.
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@end itemize
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Portability problems not fixed by Gnulib:
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@itemize
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@end itemize
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@@ -3006,6 +3006,32 @@ _GL_WARN_ON_USE (totalorderl, "totalorderl is unportable - "
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#endif
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#if @GNULIB_TOTALORDERMAG@
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# if @REPLACE_TOTALORDERMAG@
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# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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# undef totalordermag
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# define totalordermag rpl_totalordermag
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# endif
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_GL_FUNCDECL_RPL (totalordermag, int, (double const *, double const *));
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_GL_CXXALIAS_RPL (totalordermag, int, (double const *, double const *));
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# else
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# if !@HAVE_TOTALORDERMAG@
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_GL_FUNCDECL_SYS (totalordermag, int, (double const *, double const *));
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# endif
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_GL_CXXALIAS_SYS (totalordermag, int, (double const *, double const *));
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# endif
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# if __GLIBC__ >= 2
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_GL_CXXALIASWARN1 (totalordermag, int, (double const *, double const *));
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# endif
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#elif defined GNULIB_POSIXCHECK
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# undef totalordermag
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# if HAVE_RAW_DECL_TOTALORDERMAG
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_GL_WARN_ON_USE (totalordermag, "totalordermag is unportable - "
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"use gnulib module totalordermag for portability");
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# endif
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#endif
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_GL_INLINE_HEADER_END
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#endif /* _@GUARD_PREFIX@_MATH_H */
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@@ -0,0 +1,95 @@
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/* Total order of absolute value for 'double'.
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Copyright 2023-2024 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by Paul Eggert and Bruno Haible. */
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#include <config.h>
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/* Specification. */
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#include <math.h>
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#include <string.h>
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#include "verify.h"
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int
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totalordermag (double const *x, double const *y)
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{
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/* If one of *X, *Y is a NaN and the other isn't, the answer is easy:
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the NaN is "greater" than the other argument. */
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int xn = isnand (*x);
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int yn = isnand (*y);
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if (!xn != !yn)
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return yn;
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/* If none of *X, *Y is a NaN, the '<=' operator on the absolute values
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does the job, including for -Infinity and +Infinity. */
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if (!xn)
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return (signbit (*x) ? - *x : *x) <= (signbit (*y) ? - *y : *y);
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/* At this point, *X and *Y are NaNs. */
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#if defined DBL_SIGNBIT_WORD && defined DBL_SIGNBIT_BIT
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/* The use of a union to extract the bits of the representation of a
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'double' is safe in practice, despite of the "aliasing rules" of
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C99, because the GCC docs say
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"Even with '-fstrict-aliasing', type-punning is allowed, provided the
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memory is accessed through the union type."
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and similarly for other compilers. */
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# define NWORDS \
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((sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
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union { unsigned int word[NWORDS]; unsigned long long i; double value; }
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xu = {0}, yu = {0};
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# if 0
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xu.value = *x;
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yu.value = *y;
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# else
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# if defined __GNUC__ || defined __clang__
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/* Prevent gcc and clang from reusing the values of *x and *y (fetched above)
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in optimized inlined memcpy expansions.
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Seen with gcc <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114659>
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and with clang 16.0.6 on OpenBSD 7.5. */
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__asm__ __volatile__ ("" : : : "memory");
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# endif
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/* On 32-bit x86 processors, as well as on x86_64 processors with
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CC="gcc -mfpmath=387", the evaluation of *x and *y above is done through
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an 'fldl' instruction, which converts a signalling NaN to a quiet NaN. See
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<https://lists.gnu.org/archive/html/bug-gnulib/2023-10/msg00060.html>
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for details. Use memcpy to avoid this. */
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memcpy (&xu.value, x, sizeof (double));
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memcpy (&yu.value, y, sizeof (double));
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# endif
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verify (NWORDS == 2);
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return ((xu.i & ~(1ULL << (DBL_SIGNBIT_BIT + 32))) /* *X without its sign bit */
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# if defined __hppa || (defined __mips__ && !MIPS_NAN2008_DOUBLE) || defined __sh__
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/* Invert the most significant bit of the mantissa field.
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Cf. snan.h. */
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^ (1ULL << 51)
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# endif
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) <=
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((yu.i & ~(1ULL << (DBL_SIGNBIT_BIT + 32))) /* *Y without its sign bit */
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# if defined __hppa || (defined __mips__ && !MIPS_NAN2008_DOUBLE) || defined __sh__
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/* Invert the most significant bit of the mantissa field.
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Cf. snan.h. */
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^ (1ULL << 51)
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# endif
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);
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#else
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# error "Please port gnulib totalordermagf.c to your platform!"
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#endif
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}
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+6
-2
@@ -1,5 +1,5 @@
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# math_h.m4
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# serial 135
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# serial 136
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dnl Copyright (C) 2007-2024 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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@@ -56,7 +56,8 @@ AC_DEFUN_ONCE([gl_MATH_H],
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setpayload setpayloadf setpayloadl
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setpayloadsig setpayloadsigf setpayloadsigl
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sinf sinl sinhf sqrtf sqrtl
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tanf tanl tanhf totalorder totalorderf totalorderl trunc truncf truncl])
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tanf tanl tanhf totalorder totalorderf totalorderl totalordermag
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trunc truncf truncl])
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])
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# gl_MATH_MODULE_INDICATOR([modulename])
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@@ -183,6 +184,7 @@ AC_DEFUN([gl_MATH_H_REQUIRE_DEFAULTS],
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gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TOTALORDER])
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gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TOTALORDERF])
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gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TOTALORDERL])
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gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TOTALORDERMAG])
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gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TRUNC])
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gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TRUNCF])
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gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TRUNCL])
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@@ -273,6 +275,7 @@ AC_DEFUN([gl_MATH_H_DEFAULTS],
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HAVE_TOTALORDER=1; AC_SUBST([HAVE_TOTALORDER])
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HAVE_TOTALORDERF=1; AC_SUBST([HAVE_TOTALORDERF])
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HAVE_TOTALORDERL=1; AC_SUBST([HAVE_TOTALORDERL])
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HAVE_TOTALORDERMAG=1; AC_SUBST([HAVE_TOTALORDERMAG])
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HAVE_DECL_ACOSL=1; AC_SUBST([HAVE_DECL_ACOSL])
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HAVE_DECL_ASINL=1; AC_SUBST([HAVE_DECL_ASINL])
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HAVE_DECL_ATANL=1; AC_SUBST([HAVE_DECL_ATANL])
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@@ -392,6 +395,7 @@ AC_DEFUN([gl_MATH_H_DEFAULTS],
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REPLACE_TOTALORDER=0; AC_SUBST([REPLACE_TOTALORDER])
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REPLACE_TOTALORDERF=0; AC_SUBST([REPLACE_TOTALORDERF])
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REPLACE_TOTALORDERL=0; AC_SUBST([REPLACE_TOTALORDERL])
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REPLACE_TOTALORDERMAG=0; AC_SUBST([REPLACE_TOTALORDERMAG])
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REPLACE_TRUNC=0; AC_SUBST([REPLACE_TRUNC])
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REPLACE_TRUNCF=0; AC_SUBST([REPLACE_TRUNCF])
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REPLACE_TRUNCL=0; AC_SUBST([REPLACE_TRUNCL])
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@@ -0,0 +1,137 @@
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# totalordermag.m4
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# serial 1
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dnl Copyright 2023-2024 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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AC_DEFUN([gl_FUNC_TOTALORDERMAGF],
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[
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AC_REQUIRE([gl_MATH_H_DEFAULTS])
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AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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dnl glibc versions < 2.31 had an incompatible declaration of this function,
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dnl see <https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=42760d764649ad82f5fe45a26cbdf2c2500409f7>
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AC_CACHE_CHECK([whether totalordermagf has a non-standard declaration],
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[gl_cv_func_totalordermagf_incompatible],
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[AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[[#include <math.h>
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]],
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[[extern
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#ifdef __cplusplus
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"C"
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#endif
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int totalordermagf (float const *, float const *);
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]])
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],
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[gl_cv_func_totalordermagf_incompatible=no],
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[gl_cv_func_totalordermagf_incompatible=yes])
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])
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if test $gl_cv_func_totalordermagf_incompatible = yes; then
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REPLACE_TOTALORDERMAGF=1
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else
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gl_MATHFUNC([totalordermagf], [int], [(float const *, float const *)])
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if test $gl_cv_func_totalordermagf_no_libm != yes \
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&& test $gl_cv_func_totalordermagf_in_libm != yes; then
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HAVE_TOTALORDERMAGF=0
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fi
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fi
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if test $HAVE_TOTALORDERMAGF = 0 || test $REPLACE_TOTALORDERMAGF = 1; then
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TOTALORDERMAGF_LIBM='$(ISNANF_LIBM)'
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dnl Prerequisite of lib/totalordermagf.c.
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gl_FLOAT_SIGN_LOCATION
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gl_NAN_MIPS
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fi
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AC_SUBST([TOTALORDERMAGF_LIBM])
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])
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AC_DEFUN([gl_FUNC_TOTALORDERMAG],
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[
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AC_REQUIRE([gl_MATH_H_DEFAULTS])
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AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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|
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dnl glibc versions < 2.31 had an incompatible declaration of this function,
|
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dnl see <https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=42760d764649ad82f5fe45a26cbdf2c2500409f7>
|
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AC_CACHE_CHECK([whether totalordermag has a non-standard declaration],
|
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[gl_cv_func_totalordermag_incompatible],
|
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[AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
|
||||
[[#include <math.h>
|
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]],
|
||||
[[extern
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#ifdef __cplusplus
|
||||
"C"
|
||||
#endif
|
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int totalordermag (double const *, double const *);
|
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]])
|
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],
|
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[gl_cv_func_totalordermag_incompatible=no],
|
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[gl_cv_func_totalordermag_incompatible=yes])
|
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])
|
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if test $gl_cv_func_totalordermag_incompatible = yes; then
|
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REPLACE_TOTALORDERMAG=1
|
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else
|
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gl_MATHFUNC([totalordermag], [int], [(double const *, double const *)])
|
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if test $gl_cv_func_totalordermag_no_libm != yes \
|
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&& test $gl_cv_func_totalordermag_in_libm != yes; then
|
||||
HAVE_TOTALORDERMAG=0
|
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fi
|
||||
fi
|
||||
if test $HAVE_TOTALORDERMAG = 0 || test $REPLACE_TOTALORDERMAG = 1; then
|
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TOTALORDERMAG_LIBM='$(ISNAND_LIBM)'
|
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dnl Prerequisite of lib/totalordermag.c.
|
||||
gl_DOUBLE_SIGN_LOCATION
|
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gl_NAN_MIPS
|
||||
fi
|
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AC_SUBST([TOTALORDERMAG_LIBM])
|
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])
|
||||
|
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AC_DEFUN([gl_FUNC_TOTALORDERMAGL],
|
||||
[
|
||||
AC_REQUIRE([gl_MATH_H_DEFAULTS])
|
||||
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
|
||||
AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
|
||||
|
||||
dnl glibc versions < 2.31 had an incompatible declaration of this function,
|
||||
dnl see <https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=42760d764649ad82f5fe45a26cbdf2c2500409f7>
|
||||
AC_CACHE_CHECK([whether totalordermagl has a non-standard declaration],
|
||||
[gl_cv_func_totalordermagl_incompatible],
|
||||
[AC_COMPILE_IFELSE(
|
||||
[AC_LANG_PROGRAM(
|
||||
[[#include <math.h>
|
||||
]],
|
||||
[[extern
|
||||
#ifdef __cplusplus
|
||||
"C"
|
||||
#endif
|
||||
int totalordermagl (long double const *, long double const *);
|
||||
]])
|
||||
],
|
||||
[gl_cv_func_totalordermagl_incompatible=no],
|
||||
[gl_cv_func_totalordermagl_incompatible=yes])
|
||||
])
|
||||
if test $gl_cv_func_totalordermagl_incompatible = yes; then
|
||||
REPLACE_TOTALORDERMAGL=1
|
||||
else
|
||||
gl_MATHFUNC([totalordermagl], [int],
|
||||
[(long double const *, long double const *)])
|
||||
if test $gl_cv_func_totalordermagl_no_libm != yes \
|
||||
&& test $gl_cv_func_totalordermagl_in_libm != yes; then
|
||||
HAVE_TOTALORDERMAGL=0
|
||||
fi
|
||||
fi
|
||||
if test $HAVE_TOTALORDERMAGL = 0 || test $REPLACE_TOTALORDERMAGL = 1; then
|
||||
dnl Find libraries needed to link lib/totalorderl.c.
|
||||
if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
|
||||
AC_REQUIRE([gl_FUNC_TOTALORDERMAG])
|
||||
TOTALORDERMAGL_LIBM="$TOTALORDERMAG_LIBM"
|
||||
else
|
||||
TOTALORDERMAGL_LIBM='$(ISNANL_LIBM)'
|
||||
fi
|
||||
dnl Prerequisite of lib/totalordermagl.c.
|
||||
gl_LONG_DOUBLE_SIGN_LOCATION
|
||||
gl_NAN_MIPS
|
||||
fi
|
||||
AC_SUBST([TOTALORDERMAGL_LIBM])
|
||||
])
|
||||
@@ -144,6 +144,7 @@ math.h: math.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(
|
||||
-e 's/@''GNULIB_TOTALORDER''@/$(GNULIB_TOTALORDER)/g' \
|
||||
-e 's/@''GNULIB_TOTALORDERF''@/$(GNULIB_TOTALORDERF)/g' \
|
||||
-e 's/@''GNULIB_TOTALORDERL''@/$(GNULIB_TOTALORDERL)/g' \
|
||||
-e 's/@''GNULIB_TOTALORDERMAG''@/$(GNULIB_TOTALORDERMAG)/g' \
|
||||
-e 's/@''GNULIB_MDA_J0''@/$(GNULIB_MDA_J0)/g' \
|
||||
-e 's/@''GNULIB_MDA_J1''@/$(GNULIB_MDA_J1)/g' \
|
||||
-e 's/@''GNULIB_MDA_JN''@/$(GNULIB_MDA_JN)/g' \
|
||||
@@ -224,6 +225,7 @@ math.h: math.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(
|
||||
-e 's|@''HAVE_TOTALORDER''@|$(HAVE_TOTALORDER)|g' \
|
||||
-e 's|@''HAVE_TOTALORDERF''@|$(HAVE_TOTALORDERF)|g' \
|
||||
-e 's|@''HAVE_TOTALORDERL''@|$(HAVE_TOTALORDERL)|g' \
|
||||
-e 's|@''HAVE_TOTALORDERMAG''@|$(HAVE_TOTALORDERMAG)|g' \
|
||||
< $@-t2 > $@-t3
|
||||
$(AM_V_at)sed \
|
||||
-e 's|@''HAVE_DECL_ACOSL''@|$(HAVE_DECL_ACOSL)|g' \
|
||||
@@ -350,6 +352,7 @@ math.h: math.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(
|
||||
-e 's|@''REPLACE_TOTALORDER''@|$(REPLACE_TOTALORDER)|g' \
|
||||
-e 's|@''REPLACE_TOTALORDERF''@|$(REPLACE_TOTALORDERF)|g' \
|
||||
-e 's|@''REPLACE_TOTALORDERL''@|$(REPLACE_TOTALORDERL)|g' \
|
||||
-e 's|@''REPLACE_TOTALORDERMAG''@|$(REPLACE_TOTALORDERMAG)|g' \
|
||||
-e 's|@''REPLACE_TRUNC''@|$(REPLACE_TRUNC)|g' \
|
||||
-e 's|@''REPLACE_TRUNCF''@|$(REPLACE_TRUNCF)|g' \
|
||||
-e 's|@''REPLACE_TRUNCL''@|$(REPLACE_TRUNCL)|g' \
|
||||
|
||||
@@ -0,0 +1,39 @@
|
||||
Description:
|
||||
totalordermag function: total order of absolute value on double
|
||||
|
||||
Files:
|
||||
lib/totalordermag.c
|
||||
m4/mathfunc.m4
|
||||
m4/totalordermag.m4
|
||||
m4/nan-mips.m4
|
||||
m4/signbit.m4
|
||||
|
||||
Depends-on:
|
||||
math
|
||||
extensions
|
||||
verify [test $HAVE_TOTALORDERMAG = 0 || test $REPLACE_TOTALORDERMAG = 1]
|
||||
isnand [test $HAVE_TOTALORDERMAG = 0 || test $REPLACE_TOTALORDERMAG = 1]
|
||||
signbit [test $HAVE_TOTALORDERMAG = 0 || test $REPLACE_TOTALORDERMAG = 1]
|
||||
|
||||
configure.ac:
|
||||
gl_FUNC_TOTALORDERMAG
|
||||
gl_CONDITIONAL([GL_COND_OBJ_TOTALORDERMAG],
|
||||
[test $HAVE_TOTALORDERMAG = 0 || test $REPLACE_TOTALORDERMAG = 1])
|
||||
gl_MATH_MODULE_INDICATOR([totalordermag])
|
||||
|
||||
Makefile.am:
|
||||
if GL_COND_OBJ_TOTALORDERMAG
|
||||
lib_SOURCES += totalordermag.c
|
||||
endif
|
||||
|
||||
Include:
|
||||
<math.h>
|
||||
|
||||
Link:
|
||||
$(TOTALORDERMAG_LIBM)
|
||||
|
||||
License:
|
||||
LGPL
|
||||
|
||||
Maintainer:
|
||||
all
|
||||
Reference in New Issue
Block a user