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1f79bc4838
As discussed in bug 28327, C23 changed the fromfp functions to return floating types instead of intmax_t / uintmax_t. (Although the motivation in N2548 was reducing the use of intmax_t in library interfaces, the new version does have the advantage of being able to specify arbitrary integer widths for e.g. assigning the result to a _BitInt, as well as being able to indicate an error case in-band with a NaN return.) As with other such changes from interfaces introduced in TS 18661, implement the new types as a replacement for the old ones, with the old functions remaining as compat symbols but not supported as an API. The test generator used for many of the tests is updated to handle both versions of the functions. Tested for x86_64 and x86, and with build-many-glibcs.py. Also tested tgmath tests for x86_64 with GCC 7 to make sure that the modified case for older compilers in <tgmath.h> does work. Also tested for powerpc64le to cover the ldbl-128ibm implementation and the other things that are handled differently for that configuration. The new tests fail for ibm128, but all the failures relate to incorrect signs of zero results and turn out to arise from bugs in the underlying roundl, ceill, truncl and floorl implementations that I've reported in bug 33623, rather than indicating any bug in the actual new implementation of the functions for that format. So given fixes for those functions (which shouldn't be hard, and of course should add to the tests for those functions rather than relying only on indirect testing via fromfp), the fromfp tests should start passing for ibm128 as well.
89 lines
2.7 KiB
C
89 lines
2.7 KiB
C
/* Test compilation of tgmath macros.
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Copyright (C) 2003-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <math.h>
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#include <complex.h>
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#include <tgmath.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <libc-diag.h>
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/* clang warns the global variables are not needed and will not be emitted.
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However they are used on the CHECK_RET_* macros. */
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DIAG_PUSH_NEEDS_COMMENT_CLANG;
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DIAG_IGNORE_NEEDS_COMMENT_CLANG (13, "-Wunneeded-internal-declaration");
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static float fx;
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static double dx;
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static long double lx;
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static int errors = 0;
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DIAG_POP_NEEDS_COMMENT_CLANG;
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static void
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our_error (const char *c)
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{
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puts (c);
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++errors;
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}
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/* First function where the return type is constant. */
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#define CHECK_RET_CONST_TYPE(func, rettype, arg, name, ...) \
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if (sizeof (func (arg, ## __VA_ARGS__)) != sizeof (rettype)) \
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our_error ("Return size of " #func " is wrong with " #name " argument");
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#define CHECK_RET_CONST_FLOAT(func, rettype, ...) \
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CHECK_RET_CONST_TYPE (func, rettype, fx, float, ## __VA_ARGS__)
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#define CHECK_RET_CONST_DOUBLE(func, rettype, ...) \
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CHECK_RET_CONST_TYPE (func, rettype, dx, double, ## __VA_ARGS__)
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#define CHECK_RET_CONST_LDOUBLE(func, rettype, ...) \
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CHECK_RET_CONST_TYPE (func, rettype, lx, long double, ## __VA_ARGS__)
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#define CHECK_RET_CONST(func, rettype, ...) \
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static void \
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check_return_ ##func (void) \
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{ \
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CHECK_RET_CONST_FLOAT (func, rettype, ## __VA_ARGS__) \
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CHECK_RET_CONST_DOUBLE (func, rettype, ## __VA_ARGS__) \
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CHECK_RET_CONST_LDOUBLE (func, rettype, ## __VA_ARGS__) \
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}
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CHECK_RET_CONST(ilogb, int)
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CHECK_RET_CONST(llogb, long)
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CHECK_RET_CONST(lrint, long)
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CHECK_RET_CONST(lround, long)
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CHECK_RET_CONST(llrint, long long)
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CHECK_RET_CONST(llround, long long)
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static int
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do_test (void)
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{
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check_return_ilogb ();
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check_return_llogb ();
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check_return_lrint ();
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check_return_lround ();
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check_return_llrint ();
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check_return_llround ();
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printf ("%zd\n", sizeof (carg (lx)));
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return errors != 0;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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