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authorGabriel F. T. Gomes <gabriel@inconstante.eti.br>2017-11-03 10:44:36 -0200
committerGabriel F. T. Gomes <gabriel@inconstante.eti.br>2017-12-19 23:26:59 -0200
commitc85e54ac6cef0faed7b7ffc722f52523dec59bf5 (patch)
tree594a7a95e759e7035ee80ea0dee46b09f917f9aa /math/Makefile
parent10e93d968716ab82931d593bada121c17c0a4b93 (diff)
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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.
Diffstat (limited to 'math/Makefile')
-rw-r--r--math/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/math/Makefile b/math/Makefile
index cba9ce9..8978f2e 100644
--- a/math/Makefile
+++ b/math/Makefile
@@ -220,7 +220,7 @@ tests-static += atest-exp atest-sincos atest-exp2
ifneq (,$(CXX))
tests += test-math-isinff test-math-iszero test-math-issignaling \
- test-math-iscanonical test-math-cxx11
+ test-math-iscanonical test-math-cxx11 test-math-iseqsig
endif
ifneq (no,$(PERL))