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Gabriel F. T. Gomes c85e54ac6c Provide a C++ version of iseqsig (bug 22377) 
In C++ mode, __MATH_TG cannot be used for defining iseqsig, because
__MATH_TG relies on __builtin_types_compatible_p, which is a C-only
builtin.  This is true when float128 is provided as an ABI-distinct type
from long double.

Moreover, the comparison macros from ISO C take two floating-point
arguments, which need not have the same type.  Choosing what underlying
function to call requires evaluating the formats of the arguments, then
selecting which is wider.  The macro __MATH_EVAL_FMT2 provides this
information, however, only the type of the macro expansion is relevant
(actually evaluating the expression would be incorrect).

This patch provides a C++ version of iseqsig, in which only the type of
__MATH_EVAL_FMT2 (__typeof or decltype) is used as a template parameter
for __iseqsig_type.  This function calls the appropriate underlying
function.

Tested for powerpc64le and x86_64.

	[BZ #22377]
	* math/Makefile [C++] (tests): Add test for iseqsig.
	* math/math.h [C++] (iseqsig): New implementation, which does
	not rely on __MATH_TG/__builtin_types_compatible_p.
	* math/test-math-iseqsig.cc: New file.
	* sysdeps/powerpc/powerpc64le/Makefile
	(CFLAGS-test-math-iseqsig.cc): New variable.
 		2017-12-19 23:26:59 -02:00
..
bits Add _Float64x function aliases. 2017-11-27 14:16:47 +00:00
fpu powerpc: Update ulps 2017-12-16 14:04:14 +05:30
nofpu Use fabs(f/l) rather than __fabs 2017-09-29 18:54:24 +01:00
nptl Add elision tunables 2017-12-05 17:48:48 -02:00
power4 Revert exp reimplementation (causes test failures). 2017-12-19 18:11:37 +00:00
power5+/fpu Use libm_alias_float for powerpc. 2017-12-05 00:26:26 +00:00
power6 Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
power7/fpu Use libm_alias_float for powerpc. 2017-12-05 00:26:26 +00:00
powerpc32 powerpc: POWER8 memcpy optimization for cached memory 2017-12-11 17:39:42 -02:00
powerpc64 powerpc: st{r,p}cpy optimization for aligned strings 2017-12-15 10:55:58 +05:30
powerpc64le Provide a C++ version of iseqsig (bug 22377) 2017-12-19 23:26:59 -02:00
soft-fp soft-fp: support after-rounding tininess detection. 2014-02-12 18:27:12 +00:00
sys/platform Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Implies PowerPC: unify math_ldbl.h implementations 2013-03-08 11:07:15 -03:00
Makefile tst-tlsopt-powerpc as a shared lib 2017-08-03 15:39:21 +09:30
Versions Add femode_t functions. 2016-09-07 16:40:09 +00:00
abort-instr.h Update. 2002-09-15 18:31:23 +00:00
atomic-machine.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
cpu-features.c powerpc: POWER8 memcpy optimization for cached memory 2017-12-11 17:39:42 -02:00
cpu-features.h powerpc: POWER8 memcpy optimization for cached memory 2017-12-11 17:39:42 -02:00
dl-procinfo.c powerpc: POWER8 memcpy optimization for cached memory 2017-12-11 17:39:42 -02:00
dl-procinfo.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dl-tls.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dl-tls.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dl-tunables.list powerpc: POWER8 memcpy optimization for cached memory 2017-12-11 17:39:42 -02:00
ffs.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fpu_control.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
gccframe.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
hwcapinfo.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
hwcapinfo.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ifunc-sel.h Do not stack-protect ifunc resolvers [BZ #7065] 2016-12-26 10:08:41 +01:00
jmpbuf-offsets.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
jmpbuf-unwind.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ldsodefs.h powerpc: POWER8 memcpy optimization for cached memory 2017-12-11 17:39:42 -02:00
libc-tls.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
locale-defines.sym powerpc: strcasestr optmization for power8 2016-04-22 19:23:13 +05:30
longjmp.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
machine-gmon.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
math-tests.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memusage.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
mod-tlsopt-powerpc.c tst-tlsopt-powerpc as a shared lib 2017-08-03 15:39:21 +09:30
mp_clz_tab.c Update. 2002-03-14 20:48:50 +00:00
novmx-longjmp.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
novmx-sigjmp.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
novmxsetjmp.h Remove __need macros from signal.h. 2017-05-20 19:04:43 -04:00
preconfigure Remove --with-fp / --without-fp. 2017-12-12 13:56:47 +00:00
rtld-global-offsets.sym PowerPC: Define AT_HWCAP2 bits and AT_HWCAP2 handling for POWER8. 2013-06-28 16:52:49 -05:00
sched_cpucount.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
sigjmp.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
sotruss-lib.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
stackinfo.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
sysdep.h Add elision tunables 2017-12-05 17:48:48 -02:00
test-arith.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
test-arithf.c Update. 1997-08-10 18:37:15 +00:00
test-get_hwcap-static.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
test-get_hwcap.c powerpc: Convert tests to the new support test-driver 2017-02-21 14:00:00 -03:00
test-gettimebase.c powerpc: Convert tests to the new support test-driver 2017-02-21 14:00:00 -03:00
tls-macros.h Split tls-macros.h in sysdeps directories. 2012-07-19 17:04:04 -03:00
tst-set_ppr.c Miscellaneous low-risk changes preparing for _ISOMAC testsuite. 2017-03-01 20:32:50 -05:00
tst-stack-align.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tst-tlsifunc-static.c powerpc: Fix float128 IFUNC relocations [BZ #21707] 2017-07-17 17:49:26 -03:00
tst-tlsifunc.c powerpc: Fix float128 IFUNC relocations [BZ #21707] 2017-07-17 17:49:26 -03:00
tst-tlsopt-powerpc.c tst-tlsopt-powerpc as a shared lib 2017-08-03 15:39:21 +09:30