Mercurial > hg > octave-lyh > gnulib-hg
changeset 13980:6eb5574f0333
New module 'roundf-ieee'.
* modules/roundf-ieee: New file.
* m4/roundf.m4 (gl_FUNC_ROUNDF): If gl_FUNC_ROUNDF_IEEE is also used,
test whether roundf works according to ISO C 99 with IEC 60559.
* m4/roundf-ieee.m4: New file.
* modules/roundf-ieee-tests: New file.
* tests/test-roundf-ieee.c: New file, based on tests/test-roundf1.c.
* tests/test-roundf1.c (main): Remove signbit tests.
* modules/roundf-tests (Depends-on): Remove 'signbit'.
* doc/posix-functions/roundf.texi: Mention the new module.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Tue, 21 Dec 2010 15:58:00 +0100 |
parents | 84d7ae75b38f |
children | 8a7dbd29e9a5 |
files | ChangeLog doc/posix-functions/roundf.texi m4/roundf-ieee.m4 m4/roundf.m4 modules/roundf-ieee modules/roundf-ieee-tests modules/roundf-tests tests/test-roundf-ieee.c tests/test-roundf1.c |
diffstat | 9 files changed, 149 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 'roundf-ieee'. + * modules/roundf-ieee: New file. + * m4/roundf.m4 (gl_FUNC_ROUNDF): If gl_FUNC_ROUNDF_IEEE is also used, + test whether roundf works according to ISO C 99 with IEC 60559. + * m4/roundf-ieee.m4: New file. + * modules/roundf-ieee-tests: New file. + * tests/test-roundf-ieee.c: New file, based on tests/test-roundf1.c. + * tests/test-roundf1.c (main): Remove signbit tests. + * modules/roundf-tests (Depends-on): Remove 'signbit'. + * doc/posix-functions/roundf.texi: Mention the new module. + 2010-12-21 Bruno Haible <bruno@clisp.org> New module 'truncf-ieee'.
--- a/doc/posix-functions/roundf.texi +++ b/doc/posix-functions/roundf.texi @@ -4,9 +4,9 @@ POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/roundf.html} -Gnulib module: roundf +Gnulib module: roundf or roundf-ieee -Portability problems fixed by Gnulib: +Portability problems fixed by either Gnulib module @code{roundf} or @code{roundf-ieee}: @itemize @item This function is missing on some platforms: @@ -19,6 +19,14 @@ mingw. @end itemize +Portability problems fixed by Gnulib module @code{roundf-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/roundf-ieee.m4 @@ -0,0 +1,15 @@ +# roundf-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 roundf.m4 and not inlined in the +dnl module description), so that gl_FUNC_ROUNDF can test whether 'aclocal' has +dnl found uses of this macro. + +AC_DEFUN([gl_FUNC_ROUNDF_IEEE], +[ + m4_divert_text([INIT_PREPARE], [gl_roundf_required=ieee]) + AC_REQUIRE([gl_FUNC_ROUNDF]) +])
--- a/m4/roundf.m4 +++ b/m4/roundf.m4 @@ -1,4 +1,4 @@ -# roundf.m4 serial 9 +# roundf.m4 serial 10 dnl Copyright (C) 2007-2010 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_ROUNDF], [ + m4_divert_text([DEFAULTS], [gl_roundf_required=plain]) AC_REQUIRE([gl_MATH_H_DEFAULTS]) dnl Persuade glibc <math.h> to declare roundf(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) @@ -50,6 +51,40 @@ if test "$ROUNDF_LIBM" = missing; then REPLACE_ROUNDF=1 fi + m4_ifdef([gl_FUNC_ROUNDF_IEEE], [ + if test $gl_roundf_required = ieee && test $REPLACE_ROUNDF = 0; then + AC_CACHE_CHECK([whether roundf works according to ISO C 99 with IEC 60559], + [gl_cv_func_roundf_ieee], + [ + save_LIBS="$LIBS" + LIBS="$LIBS $ROUNDF_LIBM" + AC_RUN_IFELSE( + [AC_LANG_SOURCE([[ +#ifndef __NO_MATH_INLINES +# define __NO_MATH_INLINES 1 /* for glibc */ +#endif +#include <math.h> +]gl_FLOAT_MINUS_ZERO_CODE[ +]gl_FLOAT_SIGNBIT_CODE[ +int main() +{ + /* Test whether roundf (-0.0f) is -0.0f. */ + if (signbitf (minus_zerof) && !signbitf (roundf (minus_zerof))) + return 1; + return 0; +} + ]])], + [gl_cv_func_roundf_ieee=yes], + [gl_cv_func_roundf_ieee=no], + [gl_cv_func_roundf_ieee="guessing no"]) + LIBS="$save_LIBS" + ]) + case "$gl_cv_func_roundf_ieee" in + *yes) ;; + *) REPLACE_ROUNDF=1 ;; + esac + fi + ]) else HAVE_DECL_ROUNDF=0 fi
new file mode 100644 --- /dev/null +++ b/modules/roundf-ieee @@ -0,0 +1,27 @@ +Description: +roundf() function according to ISO C 99 with IEC 60559. + +Files: +m4/roundf-ieee.m4 +m4/minus-zero.m4 +m4/signbit.m4 + +Depends-on: +roundf + +configure.ac: +gl_FUNC_ROUNDF_IEEE + +Makefile.am: + +Include: +<math.h> + +Link: +$(ROUNDF_LIBM) + +License: +LGPL + +Maintainer: +Bruno Haible
new file mode 100644 --- /dev/null +++ b/modules/roundf-ieee-tests @@ -0,0 +1,15 @@ +Files: +tests/test-roundf-ieee.c +tests/minus-zero.h +tests/macros.h + +Depends-on: +float +signbit + +configure.ac: + +Makefile.am: +TESTS += test-roundf-ieee +check_PROGRAMS += test-roundf-ieee +test_roundf_ieee_LDADD = $(LDADD) @ROUNDF_LIBM@
--- a/modules/roundf-tests +++ b/modules/roundf-tests @@ -11,7 +11,6 @@ ceilf floorf isnanf-nolibm -signbit stdbool stdint verify
new file mode 100644 --- /dev/null +++ b/tests/test-roundf-ieee.c @@ -0,0 +1,33 @@ +/* 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 "minus-zero.h" +#include "macros.h" + +int +main () +{ + /* Zero. */ + ASSERT (!signbit (roundf (0.0f))); + ASSERT (!!signbit (roundf (minus_zerof)) == !!signbit (minus_zerof)); + + return 0; +}
--- a/tests/test-roundf1.c +++ b/tests/test-roundf1.c @@ -35,9 +35,7 @@ { /* Zero. */ ASSERT (roundf (0.0f) == 0.0f); - ASSERT (!signbit (roundf (0.0f))); ASSERT (roundf (minus_zerof) == 0.0f); - ASSERT (!!signbit (minus_zerof) == !!signbit (roundf (minus_zerof))); /* Positive numbers. */ ASSERT (roundf (0.3f) == 0.0f); ASSERT (roundf (0.5f) == 1.0f);