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| author | Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com> | 2017-08-14 13:46:15 -0300 |
|---|---|---|
| committer | Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com> | 2017-08-22 10:05:41 -0300 |
| commit | a16e8bc08edca84d507715c66d6cddbbc7ed3b62 (patch) | |
| tree | f997f9780b600a0da3f0456162cc2405a0b19b1e /ChangeLog | |
| parent | 8d2ec553295a16ca94fe0285d6307e3b00a402d6 (diff) | |
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Provide a C++ version of issignaling that does not use __MATH_TG
The macro __MATH_TG contains the logic to select between long double and
_Float128, when these types are ABI-distinct. This logic relies on
__builtin_types_compatible_p, which is not available in C++ mode.
On the other hand, C++ function overloading provides the means to
distinguish between the floating-point types. The overloading
resolution will match the correct parameter regardless of type
qualifiers, i.e.: const and volatile.
Tested for powerpc64le, s390x, and x86_64.
* math/math.h [defined __cplusplus] (issignaling): Provide a C++
definition for issignaling that does not rely on __MATH_TG,
since __MATH_TG uses __builtin_types_compatible_p, which is only
available in C mode.
(CFLAGS-test-math-issignaling.cc): New variable.
* math/Makefile [CXX] (tests): Add test-math-issignaling.
* math/test-math-issignaling.cc: New test for C++ implementation
of type-generic issignaling.
* sysdeps/powerpc/powerpc64le/Makefile [subdir == math]
(CXXFLAGS-test-math-issignaling.cc): Add -mfloat128 to the build
options of test-math-issignaling on powerpc64le.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 14 |
1 files changed, 14 insertions, 0 deletions
@@ -1,3 +1,17 @@ +2017-08-22 Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com> + + * math/math.h [defined __cplusplus] (issignaling): Provide a C++ + definition for issignaling that does not rely on __MATH_TG, + since __MATH_TG uses __builtin_types_compatible_p, which is only + available in C mode. + (CFLAGS-test-math-issignaling.cc): New variable. + * math/Makefile [CXX] (tests): Add test-math-issignaling. + * math/test-math-issignaling.cc: New test for C++ implementation + of type-generic issignaling. + * sysdeps/powerpc/powerpc64le/Makefile [subdir == math] + (CXXFLAGS-test-math-issignaling.cc): Add -mfloat128 to the build + options of test-math-issignaling on powerpc64le. + 2017-08-22 H.J. Lu <hongjiu.lu@intel.com> * include/libc-symbols.h (__hidden_proto_hiddenattr): New for |