https://gcc.gnu.org/g:1cfdd868cea8583ba498fcc22690070d4cb24ee1
commit r16-8480-g1cfdd868cea8583ba498fcc22690070d4cb24ee1 Author: Matthias Kretz <[email protected]> Date: Sat Apr 4 11:40:38 2026 +0200 libstdc++: Require SSE2 for std::simd [PR124722] Without SSE2 double precision uses excess precision, leading to test failures. For now, std::simd remains a tech preview that simply is disabled without SSE2. libstdc++-v3/ChangeLog: PR libstdc++/124722 * include/bits/version.def: Check for __SSE2__ rather than x86. * include/bits/version.h: Regenerate. * testsuite/std/simd/arithmetic.cc: Build with -msse2. * testsuite/std/simd/arithmetic_expensive.cc: Likewise. * testsuite/std/simd/creation.cc: Likewise. * testsuite/std/simd/creation_expensive.cc: Likewise. * testsuite/std/simd/loads.cc: Likewise. * testsuite/std/simd/loads_expensive.cc: Likewise. * testsuite/std/simd/mask.cc: Likewise. * testsuite/std/simd/mask2.cc: Likewise. * testsuite/std/simd/mask2_expensive.cc: Likewise. * testsuite/std/simd/mask_expensive.cc: Likewise. * testsuite/std/simd/reductions.cc: Likewise. * testsuite/std/simd/reductions_expensive.cc: Likewise. * testsuite/std/simd/shift_left.cc: Likewise. * testsuite/std/simd/shift_left_expensive.cc: Likewise. * testsuite/std/simd/shift_right.cc: Likewise. * testsuite/std/simd/shift_right_expensive.cc: Likewise. * testsuite/std/simd/simd_alg.cc: Likewise. * testsuite/std/simd/simd_alg_expensive.cc: Likewise. * testsuite/std/simd/sse_intrin.cc: Likewise. * testsuite/std/simd/stores.cc: Likewise. * testsuite/std/simd/stores_expensive.cc: Likewise. * testsuite/std/simd/traits_common.cc: Likewise. * testsuite/std/simd/traits_math.cc: Likewise. Signed-off-by: Matthias Kretz <[email protected]> Diff: --- libstdc++-v3/include/bits/version.def | 2 +- libstdc++-v3/include/bits/version.h | 2 +- libstdc++-v3/testsuite/std/simd/arithmetic.cc | 1 + libstdc++-v3/testsuite/std/simd/arithmetic_expensive.cc | 1 + libstdc++-v3/testsuite/std/simd/creation.cc | 1 + libstdc++-v3/testsuite/std/simd/creation_expensive.cc | 1 + libstdc++-v3/testsuite/std/simd/loads.cc | 1 + libstdc++-v3/testsuite/std/simd/loads_expensive.cc | 1 + libstdc++-v3/testsuite/std/simd/mask.cc | 1 + libstdc++-v3/testsuite/std/simd/mask2.cc | 1 + libstdc++-v3/testsuite/std/simd/mask2_expensive.cc | 1 + libstdc++-v3/testsuite/std/simd/mask_expensive.cc | 1 + libstdc++-v3/testsuite/std/simd/reductions.cc | 1 + libstdc++-v3/testsuite/std/simd/reductions_expensive.cc | 1 + libstdc++-v3/testsuite/std/simd/shift_left.cc | 1 + libstdc++-v3/testsuite/std/simd/shift_left_expensive.cc | 1 + libstdc++-v3/testsuite/std/simd/shift_right.cc | 1 + libstdc++-v3/testsuite/std/simd/shift_right_expensive.cc | 1 + libstdc++-v3/testsuite/std/simd/simd_alg.cc | 1 + libstdc++-v3/testsuite/std/simd/simd_alg_expensive.cc | 1 + libstdc++-v3/testsuite/std/simd/sse_intrin.cc | 1 + libstdc++-v3/testsuite/std/simd/stores.cc | 1 + libstdc++-v3/testsuite/std/simd/stores_expensive.cc | 1 + libstdc++-v3/testsuite/std/simd/traits_common.cc | 1 + libstdc++-v3/testsuite/std/simd/traits_math.cc | 1 + 25 files changed, 25 insertions(+), 2 deletions(-) diff --git a/libstdc++-v3/include/bits/version.def b/libstdc++-v3/include/bits/version.def index 1265f01757c9..cfb90533ce45 100644 --- a/libstdc++-v3/include/bits/version.def +++ b/libstdc++-v3/include/bits/version.def @@ -2359,7 +2359,7 @@ ftms = { cxxmin = 26; extra_cond = "__cpp_structured_bindings >= 202411L " "&& __cpp_expansion_statements >= 202411L " - "&& (__x86_64__ || __i386__)"; // TODO: lift initial restriction to x86 + "&& __SSE2__"; // TODO: add more targets hosted = yes; }; }; diff --git a/libstdc++-v3/include/bits/version.h b/libstdc++-v3/include/bits/version.h index 00f352089f7a..22dd31b9d324 100644 --- a/libstdc++-v3/include/bits/version.h +++ b/libstdc++-v3/include/bits/version.h @@ -2627,7 +2627,7 @@ #undef __glibcxx_want_contracts #if !defined(__cpp_lib_simd) -# if (__cplusplus > 202302L) && _GLIBCXX_HOSTED && (__cpp_structured_bindings >= 202411L && __cpp_expansion_statements >= 202411L && (__x86_64__ || __i386__)) +# if (__cplusplus > 202302L) && _GLIBCXX_HOSTED && (__cpp_structured_bindings >= 202411L && __cpp_expansion_statements >= 202411L && __SSE2__) # define __glibcxx_simd 202506L # if defined(__glibcxx_want_all) || defined(__glibcxx_want_simd) # endif diff --git a/libstdc++-v3/testsuite/std/simd/arithmetic.cc b/libstdc++-v3/testsuite/std/simd/arithmetic.cc index 5d605255f5ca..e662a26866c6 100644 --- a/libstdc++-v3/testsuite/std/simd/arithmetic.cc +++ b/libstdc++-v3/testsuite/std/simd/arithmetic.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } #include "test_setup.h" diff --git a/libstdc++-v3/testsuite/std/simd/arithmetic_expensive.cc b/libstdc++-v3/testsuite/std/simd/arithmetic_expensive.cc index 3a476058c7a0..e62fe53b5e15 100644 --- a/libstdc++-v3/testsuite/std/simd/arithmetic_expensive.cc +++ b/libstdc++-v3/testsuite/std/simd/arithmetic_expensive.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } // { dg-timeout-factor 2 } // { dg-require-effective-target run_expensive_tests } diff --git a/libstdc++-v3/testsuite/std/simd/creation.cc b/libstdc++-v3/testsuite/std/simd/creation.cc index 905c09d6449d..f567281cdc99 100644 --- a/libstdc++-v3/testsuite/std/simd/creation.cc +++ b/libstdc++-v3/testsuite/std/simd/creation.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } #include "test_setup.h" diff --git a/libstdc++-v3/testsuite/std/simd/creation_expensive.cc b/libstdc++-v3/testsuite/std/simd/creation_expensive.cc index cdb3eba5baf5..0f54f3d5d24d 100644 --- a/libstdc++-v3/testsuite/std/simd/creation_expensive.cc +++ b/libstdc++-v3/testsuite/std/simd/creation_expensive.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } // { dg-timeout-factor 2 } // { dg-require-effective-target run_expensive_tests } diff --git a/libstdc++-v3/testsuite/std/simd/loads.cc b/libstdc++-v3/testsuite/std/simd/loads.cc index 8d48b8c55c8c..90790a46da3d 100644 --- a/libstdc++-v3/testsuite/std/simd/loads.cc +++ b/libstdc++-v3/testsuite/std/simd/loads.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } #include "test_setup.h" #include <numeric> diff --git a/libstdc++-v3/testsuite/std/simd/loads_expensive.cc b/libstdc++-v3/testsuite/std/simd/loads_expensive.cc index 79ac8700b87e..f409d0b9c00d 100644 --- a/libstdc++-v3/testsuite/std/simd/loads_expensive.cc +++ b/libstdc++-v3/testsuite/std/simd/loads_expensive.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } // { dg-timeout-factor 2 } // { dg-require-effective-target run_expensive_tests } diff --git a/libstdc++-v3/testsuite/std/simd/mask.cc b/libstdc++-v3/testsuite/std/simd/mask.cc index 9bfa356862c8..ebd9dc7728d3 100644 --- a/libstdc++-v3/testsuite/std/simd/mask.cc +++ b/libstdc++-v3/testsuite/std/simd/mask.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } #include "test_setup.h" #include <utility> diff --git a/libstdc++-v3/testsuite/std/simd/mask2.cc b/libstdc++-v3/testsuite/std/simd/mask2.cc index 4e65eac4164f..d4345c12243d 100644 --- a/libstdc++-v3/testsuite/std/simd/mask2.cc +++ b/libstdc++-v3/testsuite/std/simd/mask2.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } #include "test_setup.h" #include <utility> diff --git a/libstdc++-v3/testsuite/std/simd/mask2_expensive.cc b/libstdc++-v3/testsuite/std/simd/mask2_expensive.cc index d3943874f54a..c2a018badac0 100644 --- a/libstdc++-v3/testsuite/std/simd/mask2_expensive.cc +++ b/libstdc++-v3/testsuite/std/simd/mask2_expensive.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } // { dg-require-effective-target run_expensive_tests } // { dg-timeout-factor 2 } diff --git a/libstdc++-v3/testsuite/std/simd/mask_expensive.cc b/libstdc++-v3/testsuite/std/simd/mask_expensive.cc index dadfd3df879e..3f3a89e1d4b9 100644 --- a/libstdc++-v3/testsuite/std/simd/mask_expensive.cc +++ b/libstdc++-v3/testsuite/std/simd/mask_expensive.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } // { dg-timeout-factor 2 } // { dg-require-effective-target run_expensive_tests } diff --git a/libstdc++-v3/testsuite/std/simd/reductions.cc b/libstdc++-v3/testsuite/std/simd/reductions.cc index d40b01f509b1..b97eb1be6097 100644 --- a/libstdc++-v3/testsuite/std/simd/reductions.cc +++ b/libstdc++-v3/testsuite/std/simd/reductions.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } #include "test_setup.h" diff --git a/libstdc++-v3/testsuite/std/simd/reductions_expensive.cc b/libstdc++-v3/testsuite/std/simd/reductions_expensive.cc index 52507c499d03..c4cab956aa37 100644 --- a/libstdc++-v3/testsuite/std/simd/reductions_expensive.cc +++ b/libstdc++-v3/testsuite/std/simd/reductions_expensive.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } // { dg-timeout-factor 2 } // { dg-require-effective-target run_expensive_tests } diff --git a/libstdc++-v3/testsuite/std/simd/shift_left.cc b/libstdc++-v3/testsuite/std/simd/shift_left.cc index 1a7cc195851b..111643657e23 100644 --- a/libstdc++-v3/testsuite/std/simd/shift_left.cc +++ b/libstdc++-v3/testsuite/std/simd/shift_left.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } #include "test_setup.h" diff --git a/libstdc++-v3/testsuite/std/simd/shift_left_expensive.cc b/libstdc++-v3/testsuite/std/simd/shift_left_expensive.cc index c0179503ce9e..b7fe4f2f5e69 100644 --- a/libstdc++-v3/testsuite/std/simd/shift_left_expensive.cc +++ b/libstdc++-v3/testsuite/std/simd/shift_left_expensive.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } // { dg-timeout-factor 2 } // { dg-require-effective-target run_expensive_tests } diff --git a/libstdc++-v3/testsuite/std/simd/shift_right.cc b/libstdc++-v3/testsuite/std/simd/shift_right.cc index 99ae451ffd89..3adee7ffdbfa 100644 --- a/libstdc++-v3/testsuite/std/simd/shift_right.cc +++ b/libstdc++-v3/testsuite/std/simd/shift_right.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } #include "test_setup.h" diff --git a/libstdc++-v3/testsuite/std/simd/shift_right_expensive.cc b/libstdc++-v3/testsuite/std/simd/shift_right_expensive.cc index 2171d8aea05c..8136224e491b 100644 --- a/libstdc++-v3/testsuite/std/simd/shift_right_expensive.cc +++ b/libstdc++-v3/testsuite/std/simd/shift_right_expensive.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } // { dg-timeout-factor 2 } // { dg-require-effective-target run_expensive_tests } diff --git a/libstdc++-v3/testsuite/std/simd/simd_alg.cc b/libstdc++-v3/testsuite/std/simd/simd_alg.cc index 98da15e11e3d..03ba83de8d40 100644 --- a/libstdc++-v3/testsuite/std/simd/simd_alg.cc +++ b/libstdc++-v3/testsuite/std/simd/simd_alg.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } #include "test_setup.h" #include <utility> diff --git a/libstdc++-v3/testsuite/std/simd/simd_alg_expensive.cc b/libstdc++-v3/testsuite/std/simd/simd_alg_expensive.cc index 066c3f43e878..6f162a4b23a4 100644 --- a/libstdc++-v3/testsuite/std/simd/simd_alg_expensive.cc +++ b/libstdc++-v3/testsuite/std/simd/simd_alg_expensive.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } // { dg-timeout-factor 2 } // { dg-require-effective-target run_expensive_tests } diff --git a/libstdc++-v3/testsuite/std/simd/sse_intrin.cc b/libstdc++-v3/testsuite/std/simd/sse_intrin.cc index 7baa4118c0cf..483adb7dc2b9 100644 --- a/libstdc++-v3/testsuite/std/simd/sse_intrin.cc +++ b/libstdc++-v3/testsuite/std/simd/sse_intrin.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } #include "test_setup.h" diff --git a/libstdc++-v3/testsuite/std/simd/stores.cc b/libstdc++-v3/testsuite/std/simd/stores.cc index d5721f7daa27..259b2a98f49c 100644 --- a/libstdc++-v3/testsuite/std/simd/stores.cc +++ b/libstdc++-v3/testsuite/std/simd/stores.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } #include "test_setup.h" diff --git a/libstdc++-v3/testsuite/std/simd/stores_expensive.cc b/libstdc++-v3/testsuite/std/simd/stores_expensive.cc index 36ee941d85db..3244331210c3 100644 --- a/libstdc++-v3/testsuite/std/simd/stores_expensive.cc +++ b/libstdc++-v3/testsuite/std/simd/stores_expensive.cc @@ -1,5 +1,6 @@ // { dg-do run { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } // { dg-timeout-factor 2 } // { dg-require-effective-target run_expensive_tests } diff --git a/libstdc++-v3/testsuite/std/simd/traits_common.cc b/libstdc++-v3/testsuite/std/simd/traits_common.cc index 4ee126ccc973..ecbceef06bf3 100644 --- a/libstdc++-v3/testsuite/std/simd/traits_common.cc +++ b/libstdc++-v3/testsuite/std/simd/traits_common.cc @@ -1,5 +1,6 @@ // { dg-do compile { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } // { dg-timeout-factor 2 } #include <simd> diff --git a/libstdc++-v3/testsuite/std/simd/traits_math.cc b/libstdc++-v3/testsuite/std/simd/traits_math.cc index 2e9339e918cb..fc71ff9e3590 100644 --- a/libstdc++-v3/testsuite/std/simd/traits_math.cc +++ b/libstdc++-v3/testsuite/std/simd/traits_math.cc @@ -1,5 +1,6 @@ // { dg-do compile { target c++26 } } // { dg-require-effective-target x86 } +// { dg-additional-options "-msse2" } #include <simd> #include <stdfloat>
