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Ulrich Weigand 2400729ecf Target FP: Make use of MPFR if available 
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.
2017-11-22 13:53:43 +01:00
..
.gitignore Update and add .gitignore's 2016-09-21 13:12:21 -04:00
a4rc.sed
agentexpr.texi Fix documentation about rot agent expression bytecode 2017-07-31 11:26:50 +02:00
all-cfg.texi update copyright year range in GDB files 2017-01-01 10:52:34 +04:00
annotate.texinfo update copyright year range in GDB files 2017-01-01 10:52:34 +04:00
ChangeLog Target FP: Make use of MPFR if available 2017-11-22 13:53:43 +01:00
doxy-index.in update copyright year range in GDB files 2017-01-01 10:52:34 +04:00
Doxyfile-base.in update copyright year range in GDB files 2017-01-01 10:52:34 +04:00
Doxyfile-gdb-api.in update copyright year range in GDB files 2017-01-01 10:52:34 +04:00
Doxyfile-gdb-xref.in update copyright year range in GDB files 2017-01-01 10:52:34 +04:00
Doxyfile-gdbserver.in update copyright year range in GDB files 2017-01-01 10:52:34 +04:00
fdl.texi
filter-for-doxygen
filter-params.pl
gdb.texinfo Target FP: Make use of MPFR if available 2017-11-22 13:53:43 +01:00
gpl.texi
guile.texi Fix PR gdb/21606: SYMBOL_FUNCTIONS_DOMAIN misspelled in documentation 2017-06-20 21:31:59 -04:00
lpsrc.sed
Makefile.in Introduce "gdb/configure.nat" (and delete "gdb/config/*/*.mh" files) 2017-05-06 10:09:35 -04:00
observer.texi update copyright year range in GDB files 2017-01-01 10:52:34 +04:00
psrc.sed
python.texi Add Python rbreak command. 2017-11-16 14:14:03 +00:00
refcard.tex update copyright year range in GDB files 2017-01-01 10:52:34 +04:00
stabs.texinfo update copyright year range in GDB files 2017-01-01 10:52:34 +04:00
stack_frame.eps
stack_frame.pdf
stack_frame.png
stack_frame.svg
stack_frame.txt