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b7b88cea41
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.
52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
/* Test for the behaviour of 'is_long_double' in printf_size.
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Copyright (C) 2018 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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<http://www.gnu.org/licenses/>. */
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#include <printf.h>
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#include <stdio.h>
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#include <string.h>
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#include <support/check.h>
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static int
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do_test (void)
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{
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double d = 2000;
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double *dptr = &d;
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long double ld = 4000;
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long double *ldptr = & ld;
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struct printf_info info;
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memset (&info, 0, sizeof (info));
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info.spec = L'f';
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/* Print a value with double type. */
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printf_size (stdout, &info, (void *) &dptr);
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/* Printf a value with long double type. */
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info.is_long_double = 1;
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printf_size (stdout, &info, (void *) &ldptr);
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/* Setting both 'is_long_double' and 'is_binary128' to one is out of
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the scope of this test, because such configuration is only valid
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when _Float128 and long double are ABI-distinct (which is not
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always true in this arch-independent test). */
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return 0;
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}
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#include <support/test-driver.c>
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