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POWER7 does not support __vector long long reductions, making the generic _S_popcount implementation ill-formed. Specializing _S_popcount for PPC allows optimization and avoids the issue. libstdc++-v3/ChangeLog: * include/experimental/bits/simd.h: Add __have_power10vec conditional on _ARCH_PWR10. * include/experimental/bits/simd_builtin.h: Forward declare _MaskImplPpc and use it as _MaskImpl when __ALTIVEC__ is defined. (_MaskImplBuiltin::_S_some_of): Call _S_popcount from the _SuperImpl for optimizations and correctness. * include/experimental/bits/simd_ppc.h: Add _MaskImplPpc. (_MaskImplPpc::_S_popcount): Implement via vec_cntm for POWER10. Otherwise, for >=int use -vec_sums divided by a sizeof factor. For <int use -vec_sums(vec_sum4s(...)) to sum all mask entries. |
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| testsuite | ||
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| aclocal.m4 | ||
| ChangeLog | ||
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| config.h.in | ||
| configure | ||
| configure.ac | ||
| configure.host | ||
| crossconfig.m4 | ||
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| linkage.m4 | ||
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| README | ||
file: libstdc++-v3/README New users may wish to point their web browsers to the file index.html in the 'doc/html' subdirectory. It contains brief building instructions and notes on how to configure the library in interesting ways.