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author | Gabriel F. T. Gomes <gabriel@inconstante.eti.br> | 2018-06-28 22:38:55 -0300 |
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committer | Gabriel F. T. Gomes <gabriel@inconstante.eti.br> | 2018-07-02 10:51:01 -0300 |
commit | b7b88cea4151d85eafd7ababc2e4b7ae1daeedf5 (patch) | |
tree | 9e39b1e246cf3201522aafdbe073d29281684334 /stdio-common/tst-printfsz-islongdouble.c | |
parent | 2b445206a1a450af0e6e66d78652e1ffd80685e2 (diff) | |
download | glibc-b7b88cea4151d85eafd7ababc2e4b7ae1daeedf5.tar.gz glibc-b7b88cea4151d85eafd7ababc2e4b7ae1daeedf5.tar.xz glibc-b7b88cea4151d85eafd7ababc2e4b7ae1daeedf5.zip |
ldbl-128ibm-compat: Add printf_size
Since the addition of the _Float128 API, strfromf128 and printf_size use __printf_fp to print _Float128 values. This is achieved by setting the 'is_binary128' member of the 'printf_info' structure to one. Now that the format of long double on powerpc64le is getting a third option, this mechanism is reused for long double values that have binary128 format (i.e.: when -mabi=ieeelongdouble). This patch adds __printf_sizeieee128 as an exported symbol, but doesn't provide redirections from printf_size, yet. All redirections will be installed in a future commit, once all other functions that print or read long double values with binary128 format are ready. In __printf_fp, when 'is_binary128' is one, the floating-point argument is treated as if it was of _Float128 type, regardless of the value of 'is_long_double', thus __printf_sizeieee128 sets 'is_binary128' to the same value of 'is_long_double'. Otherwise, double values would not be printed correctly. Tested for powerpc64le.
Diffstat (limited to 'stdio-common/tst-printfsz-islongdouble.c')
-rw-r--r-- | stdio-common/tst-printfsz-islongdouble.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/stdio-common/tst-printfsz-islongdouble.c b/stdio-common/tst-printfsz-islongdouble.c new file mode 100644 index 0000000000..a6a534bb3d --- /dev/null +++ b/stdio-common/tst-printfsz-islongdouble.c @@ -0,0 +1,51 @@ +/* Test for the behaviour of 'is_long_double' in printf_size. + Copyright (C) 2018 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library 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 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <printf.h> +#include <stdio.h> +#include <string.h> + +#include <support/check.h> + +static int +do_test (void) +{ + double d = 2000; + double *dptr = &d; + long double ld = 4000; + long double *ldptr = & ld; + struct printf_info info; + + memset (&info, 0, sizeof (info)); + info.spec = L'f'; + + /* Print a value with double type. */ + printf_size (stdout, &info, (void *) &dptr); + + /* Printf a value with long double type. */ + info.is_long_double = 1; + printf_size (stdout, &info, (void *) &ldptr); + + /* Setting both 'is_long_double' and 'is_binary128' to one is out of + the scope of this test, because such configuration is only valid + when _Float128 and long double are ABI-distinct (which is not + always true in this arch-independent test). */ + return 0; +} + +#include <support/test-driver.c> |