Mercurial > hg > octave-lyh > gnulib-hg
changeset 13988:46007e663235
New module 'roundl-ieee'.
* modules/roundl-ieee: New file.
* m4/roundl.m4 (gl_FUNC_ROUNDL): If gl_FUNC_ROUNDL_IEEE is also used,
test whether roundl works according to ISO C 99 with IEC 60559.
* m4/roundl-ieee.m4: New file.
* modules/roundl-ieee-tests: New file.
* tests/test-roundl-ieee.c: New file, based on tests/test-roundl.c.
* tests/test-roundl.c (main): Remove signbit tests.
* modules/roundl-tests (Depends-on): Remove signbit.
* doc/posix-functions/roundl.texi: Mention the new module.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Tue, 21 Dec 2010 22:27:02 +0100 |
parents | 12444cea2981 |
children | b64b2c4507ad |
files | ChangeLog doc/posix-functions/roundl.texi m4/roundl-ieee.m4 m4/roundl.m4 modules/roundl-ieee modules/roundl-ieee-tests modules/roundl-tests tests/test-roundl-ieee.c tests/test-roundl.c |
diffstat | 9 files changed, 154 insertions(+), 6 deletions(-) [+] |
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--- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,16 @@ +2010-12-21 Bruno Haible <bruno@clisp.org> + + New module 'roundl-ieee'. + * modules/roundl-ieee: New file. + * m4/roundl.m4 (gl_FUNC_ROUNDL): If gl_FUNC_ROUNDL_IEEE is also used, + test whether roundl works according to ISO C 99 with IEC 60559. + * m4/roundl-ieee.m4: New file. + * modules/roundl-ieee-tests: New file. + * tests/test-roundl-ieee.c: New file, based on tests/test-roundl.c. + * tests/test-roundl.c (main): Remove signbit tests. + * modules/roundl-tests (Depends-on): Remove signbit. + * doc/posix-functions/roundl.texi: Mention the new module. + 2010-12-21 Bruno Haible <bruno@clisp.org> New module 'truncl-ieee'.
--- a/doc/posix-functions/roundl.texi +++ b/doc/posix-functions/roundl.texi @@ -4,9 +4,9 @@ POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/roundl.html} -Gnulib module: roundl +Gnulib module: roundl or roundl-ieee -Portability problems fixed by Gnulib: +Portability problems fixed by either Gnulib module @code{roundl} or @code{roundl-ieee}: @itemize @item This function is missing on some platforms: @@ -16,6 +16,14 @@ glibc 2.8, OSF/1 5.1. @end itemize +Portability problems fixed by Gnulib module @code{roundl-ieee}: +@itemize +@item +This function returns a positive zero for a minus zero argument +on some platforms: +OSF/1 5.1. +@end itemize + Portability problems not fixed by Gnulib: @itemize @end itemize
new file mode 100644 --- /dev/null +++ b/m4/roundl-ieee.m4 @@ -0,0 +1,15 @@ +# roundl-ieee.m4 serial 1 +dnl Copyright (C) 2010 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +dnl This macro is in a separate file (not in roundl.m4 and not inlined in the +dnl module description), so that gl_FUNC_ROUNDL can test whether 'aclocal' has +dnl found uses of this macro. + +AC_DEFUN([gl_FUNC_ROUNDL_IEEE], +[ + m4_divert_text([INIT_PREPARE], [gl_roundl_required=ieee]) + AC_REQUIRE([gl_FUNC_ROUNDL]) +])
--- a/m4/roundl.m4 +++ b/m4/roundl.m4 @@ -1,4 +1,4 @@ -# roundl.m4 serial 7 +# roundl.m4 serial 8 dnl Copyright (C) 2007, 2009-2010 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -6,6 +6,7 @@ AC_DEFUN([gl_FUNC_ROUNDL], [ + m4_divert_text([DEFAULTS], [gl_roundl_required=plain]) AC_REQUIRE([gl_MATH_H_DEFAULTS]) dnl Persuade glibc <math.h> to declare roundl(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) @@ -15,6 +16,40 @@ if test "$ROUNDL_LIBM" = missing; then REPLACE_ROUNDL=1 fi + m4_ifdef([gl_FUNC_ROUNDL_IEEE], [ + if test $gl_roundl_required = ieee && test $REPLACE_ROUNDL = 0; then + AC_CACHE_CHECK([whether roundl works according to ISO C 99 with IEC 60559], + [gl_cv_func_roundl_ieee], + [ + save_LIBS="$LIBS" + LIBS="$LIBS $ROUNDL_LIBM" + AC_RUN_IFELSE( + [AC_LANG_SOURCE([[ +#ifndef __NO_MATH_INLINES +# define __NO_MATH_INLINES 1 /* for glibc */ +#endif +#include <math.h> +]gl_LONG_DOUBLE_MINUS_ZERO_CODE[ +]gl_LONG_DOUBLE_SIGNBIT_CODE[ +int main() +{ + /* Test whether roundl (-0.0L) is -0.0L. */ + if (signbitl (minus_zerol) && !signbitl (roundl (minus_zerol))) + return 1; + return 0; +} + ]])], + [gl_cv_func_roundl_ieee=yes], + [gl_cv_func_roundl_ieee=no], + [gl_cv_func_roundl_ieee="guessing no"]) + LIBS="$save_LIBS" + ]) + case "$gl_cv_func_roundl_ieee" in + *yes) ;; + *) REPLACE_ROUNDL=1 ;; + esac + fi + ]) else HAVE_DECL_ROUNDL=0 fi
new file mode 100644 --- /dev/null +++ b/modules/roundl-ieee @@ -0,0 +1,27 @@ +Description: +roundl() function according to ISO C 99 with IEC 60559. + +Files: +m4/roundl-ieee.m4 +m4/minus-zero.m4 +m4/signbit.m4 + +Depends-on: +roundl + +configure.ac: +gl_FUNC_ROUNDL_IEEE + +Makefile.am: + +Include: +<math.h> + +Link: +$(ROUNDL_LIBM) + +License: +LGPL + +Maintainer: +Bruno Haible
new file mode 100644 --- /dev/null +++ b/modules/roundl-ieee-tests @@ -0,0 +1,15 @@ +Files: +tests/test-roundl-ieee.c +tests/minus-zero.h +tests/macros.h + +Depends-on: +float +signbit + +configure.ac: + +Makefile.am: +TESTS += test-roundl-ieee +check_PROGRAMS += test-roundl-ieee +test_roundl_ieee_LDADD = $(LDADD) @ROUNDL_LIBM@
--- a/modules/roundl-tests +++ b/modules/roundl-tests @@ -9,7 +9,6 @@ fpucw isnanl-nolibm float -signbit configure.ac:
new file mode 100644 --- /dev/null +++ b/tests/test-roundl-ieee.c @@ -0,0 +1,38 @@ +/* Test of rounding to nearest, breaking ties away from zero. + Copyright (C) 2010 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3, or (at your option) + any later version. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + +#include <config.h> + +#include <math.h> + +#include "fpucw.h" +#include "minus-zero.h" +#include "macros.h" + +int +main () +{ + DECL_LONG_DOUBLE_ROUNDING + + BEGIN_LONG_DOUBLE_ROUNDING (); + + /* Zero. */ + ASSERT (!signbit (roundl (0.0L))); + ASSERT (!!signbit (roundl (minus_zerol)) == !!signbit (minus_zerol)); + + return 0; +}
--- a/tests/test-roundl.c +++ b/tests/test-roundl.c @@ -42,9 +42,7 @@ /* Zero. */ ASSERT (roundl (0.0L) == 0.0L); - ASSERT (!signbit (roundl (0.0L))); ASSERT (roundl (minus_zerol) == 0.0L); - ASSERT (!!signbit (minus_zerol) == !!signbit (roundl (minus_zerol))); /* Positive numbers. */ ASSERT (roundl (0.3L) == 0.0L); ASSERT (roundl (0.5L) == 1.0L);