libstdc++: ppc: conditionalize vsx-only simd intrinsics
libstdc++'s bits/simd.h section for PowerPC, guarded by __ALTIVEC__, defines various intrinsic vector types that are only available with __VSX__: 64-bit long double, double, (un)signed long long, and 64-bit (un)signed long. experimental/simd/standard_abi_usable{,_2}.cc tests error out reporting the unmet requirements when the target cpu doesn't enable VSX. Make the reported instrinsic types conditional on __VSX__ so that <experimental/simd> can be used on PowerPC variants that do not support VSX. for libstdc++-v3/ChangeLog * include/experimental/bits/simd.h [__ALTIVEC__]: Require VSX for double, long long, and 64-bit long intrinsic types. [__ALTIVEC__] (__intrinsic_type): Mention 128-bit in preexisting long double diagnostic, adjust no-VSX double diagnostic to cover 64-bit long double as well.
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@ -2430,17 +2430,23 @@ template <typename _Tp>
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template <> \
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struct __intrinsic_type_impl<_Tp> { using type = __vector _Tp; }
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_GLIBCXX_SIMD_PPC_INTRIN(float);
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#ifdef __VSX__
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_GLIBCXX_SIMD_PPC_INTRIN(double);
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#endif
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_GLIBCXX_SIMD_PPC_INTRIN(signed char);
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_GLIBCXX_SIMD_PPC_INTRIN(unsigned char);
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_GLIBCXX_SIMD_PPC_INTRIN(signed short);
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_GLIBCXX_SIMD_PPC_INTRIN(unsigned short);
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_GLIBCXX_SIMD_PPC_INTRIN(signed int);
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_GLIBCXX_SIMD_PPC_INTRIN(unsigned int);
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#if defined __VSX__ || __SIZEOF_LONG__ == 4
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_GLIBCXX_SIMD_PPC_INTRIN(signed long);
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_GLIBCXX_SIMD_PPC_INTRIN(unsigned long);
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#endif
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#ifdef __VSX__
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_GLIBCXX_SIMD_PPC_INTRIN(signed long long);
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_GLIBCXX_SIMD_PPC_INTRIN(unsigned long long);
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#endif
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#undef _GLIBCXX_SIMD_PPC_INTRIN
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template <typename _Tp, size_t _Bytes>
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@ -2450,10 +2456,11 @@ template <typename _Tp, size_t _Bytes>
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static constexpr bool _S_is_ldouble = is_same_v<_Tp, long double>;
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// allow _Tp == long double with -mlong-double-64
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static_assert(!(_S_is_ldouble && sizeof(long double) > sizeof(double)),
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"no __intrinsic_type support for long double on PPC");
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"no __intrinsic_type support for 128-bit floating point on PowerPC");
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#ifndef __VSX__
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static_assert(!is_same_v<_Tp, double>,
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"no __intrinsic_type support for double on PPC w/o VSX");
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static_assert(!(is_same_v<_Tp, double>
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|| (_S_is_ldouble && sizeof(long double) == sizeof(double))),
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"no __intrinsic_type support for 64-bit floating point on PowerPC w/o VSX");
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#endif
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using type =
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typename __intrinsic_type_impl<
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