libstdc++'s bits/simd.h section for PPC (Altivec) defines various
intrinsic vector types that are only available along 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 ppc variants that do not have VSX support.
Regstrapped on powerpc64el-linux-gnu. Ok to install?
This is also relevant for gcc-11. Tested with
x86_64-linux-gnu-x-ppc64-vx7r2. Ok for gcc-11?
for libstdc++-v3/ChangeLog
* include/experimental/bits/simd.h [__ALTIVEC__]: Require VSX
for double, long long, and 64-bit long and 64-bit long double
intrinsic types.
---
libstdc++-v3/include/experimental/bits/simd.h | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/libstdc++-v3/include/experimental/bits/simd.h
b/libstdc++-v3/include/experimental/bits/simd.h
index 82e9841195e1d..66c07127ec435 100644
--- a/libstdc++-v3/include/experimental/bits/simd.h
+++ b/libstdc++-v3/include/experimental/bits/simd.h
@@ -2430,17 +2430,23 @@ template <typename _Tp>
template <>
\
struct __intrinsic_type_impl<_Tp> { using type = __vector _Tp; }
_GLIBCXX_SIMD_PPC_INTRIN(float);
+# ifdef __VSX__
_GLIBCXX_SIMD_PPC_INTRIN(double);
+# endif
_GLIBCXX_SIMD_PPC_INTRIN(signed char);
_GLIBCXX_SIMD_PPC_INTRIN(unsigned char);
_GLIBCXX_SIMD_PPC_INTRIN(signed short);
_GLIBCXX_SIMD_PPC_INTRIN(unsigned short);
_GLIBCXX_SIMD_PPC_INTRIN(signed int);
_GLIBCXX_SIMD_PPC_INTRIN(unsigned int);
+# if defined __VSX__ || __LONG_WIDTH__ == 32
_GLIBCXX_SIMD_PPC_INTRIN(signed long);
_GLIBCXX_SIMD_PPC_INTRIN(unsigned long);
+# endif
+# ifdef __VSX__
_GLIBCXX_SIMD_PPC_INTRIN(signed long long);
_GLIBCXX_SIMD_PPC_INTRIN(unsigned long long);
+# endif
#undef _GLIBCXX_SIMD_PPC_INTRIN
template <typename _Tp, size_t _Bytes>
@@ -2452,8 +2458,9 @@ template <typename _Tp, size_t _Bytes>
static_assert(!(_S_is_ldouble && sizeof(long double) > sizeof(double)),
"no __intrinsic_type support for long double on PPC");
#ifndef __VSX__
- static_assert(!is_same_v<_Tp, double>,
- "no __intrinsic_type support for double on PPC w/o VSX");
+ static_assert(!(is_same_v<_Tp, double>
+ || (_S_is_ldouble && sizeof(long double) ==
sizeof(double))),
+ "no __intrinsic_type support for [long] double on PPC w/o
VSX");
#endif
using type =
typename __intrinsic_type_impl<
--
Alexandre Oliva, happy hacker https://FSFLA.org/blogs/lxo/
Free Software Activist GNU Toolchain Engineer
Disinformation flourishes because many people care deeply about injustice
but very few check the facts. Ask me about <https://stallmansupport.org>
