forked from Imagelibrary/binutils-gdb
2400729ecf
This second patch introduces mfpr_float_ops, an new implementation of target_float_ops. This implements precise emulation of target floating-point formats using the MPFR library. This is then used to perform operations on types that do not match any host type. Note that use of MPFR is still not required. The patch adds a configure option --with-mpfr similar to --with-expat. If use of MPFR is disabled via the option or MPFR is not available, code will fall back to current behavior. This means that operations on types that do not match any host type will be implemented on the host long double type instead. A new test case verifies that we can correctly print the largest __float128 value now. gdb/ChangeLog: 2017-11-22 Ulrich Weigand <uweigand@de.ibm.com> * NEWS: Document use of GNU MPFR. * README: Likewise. * Makefile.in (LIBMPFR): Add define. (CLIBS): Add $(LIBMPFR). * configure.ac: Add --with-mpfr configure option. * configure: Regenerate. * config.in: Regenerate. * target-float.c [HAVE_LIBMPFR]: Include <mpfr.h>. (class mpfr_float_ops): New type. (mpfr_float_ops::from_target): Two new overloaded functions. (mpfr_float_ops::to_target): Likewise. (mpfr_float_ops::to_string): New function. (mpfr_float_ops::from_string): Likewise. (mpfr_float_ops::to_longest): Likewise. (mpfr_float_ops::from_longest): Likewise. (mpfr_float_ops::from_ulongest): Likewise. (mpfr_float_ops::to_host_double): Likewise. (mpfr_float_ops::from_host_double): Likewise. (mpfr_float_ops::convert): Likewise. (mpfr_float_ops::binop): Likewise. (mpfr_float_ops::compare): Likewise. (get_target_float_ops): Use mpfr_float_ops if available. gdb/doc/ChangeLog: 2017-11-22 Ulrich Weigand <uweigand@de.ibm.com> * gdb.texinfo (Requirements): Document use of GNU MPFR. gdb/testsuite/ChangeLog: 2017-11-22 Ulrich Weigand <uweigand@de.ibm.com> * gdb.base/float128.c (large128): New variable. * gdb.base/float128.exp: Add test to print largest __float128 value.
35 lines
1.1 KiB
C
35 lines
1.1 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2016-2017 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <stdlib.h>
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long double ld;
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__float128 f128;
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// Test largest IEEE-128 value. This has to be supported since the
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// __float128 data type by definition is encoded as IEEE-128.
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__float128 large128 = 1.18973149535723176508575932662800702e+4932q;
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int main()
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{
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ld = 1.375l;
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f128 = 2.375q;
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return 0;
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}
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