[PATCH] libstdc++: Fix test assumptions on long and long double

[Matthias Kretz via Gcc-patches]

OK for master and all backports (after 11.4 is done)

tested on powerpc64le-linux-gnu (with 64-bit long double)

----------- 8< ------------

Expect that long might not fit into the long double mantissa bits.

Signed-off-by: Matthias Kretz <m.kr...@gsi.de>

libstdc++-v3/ChangeLog:

        * testsuite/experimental/simd/tests/operator_cvt.cc: Make long
        double <-> (u)long conversion tests conditional on sizeof(long
        double) and sizeof(long).
---
 .../experimental/simd/tests/operator_cvt.cc   | 30 +++++++++++++++----
 1 file changed, 24 insertions(+), 6 deletions(-)


--
──────────────────────────────────────────────────────────────────────────
 Dr. Matthias Kretz                           https://mattkretz.github.io
 GSI Helmholtz Centre for Heavy Ion Research               https://gsi.de
 stdₓ::simd
──────────────────────────────────────────────────────────────────────────
diff --git a/libstdc++-v3/testsuite/experimental/simd/tests/operator_cvt.cc b/libstdc++-v3/testsuite/experimental/simd/tests/operator_cvt.cc
index c1acfdf10e0..9b6cb38ff82 100644
--- a/libstdc++-v3/testsuite/experimental/simd/tests/operator_cvt.cc
+++ b/libstdc++-v3/testsuite/experimental/simd/tests/operator_cvt.cc
@@ -219,8 +219,6 @@ namespace simd_abi
 	binary_op_return_type<vldouble, short>();
 	binary_op_return_type<vldouble, ushort>();
 	binary_op_return_type<vldouble, uint>();
-	binary_op_return_type<vldouble, long>();
-	binary_op_return_type<vldouble, ulong>();
 	binary_op_return_type<vldouble, float>();
 	binary_op_return_type<vldouble, double>();
 
@@ -230,8 +228,6 @@ namespace simd_abi
 	binary_op_return_type<vf64<long double>, ushort>();
 	binary_op_return_type<vf64<long double>, int>();
 	binary_op_return_type<vf64<long double>, uint>();
-	binary_op_return_type<vf64<long double>, long>();
-	binary_op_return_type<vf64<long double>, ulong>();
 	binary_op_return_type<vf64<long double>, float>();
 	binary_op_return_type<vf64<long double>, double>();
 	binary_op_return_type<vf64<long double>, vf64<long double>>();
@@ -244,8 +240,6 @@ namespace simd_abi
 	binary_op_return_type<simd<long double, A>, ushort>();
 	binary_op_return_type<simd<long double, A>, int>();
 	binary_op_return_type<simd<long double, A>, uint>();
-	binary_op_return_type<simd<long double, A>, long>();
-	binary_op_return_type<simd<long double, A>, ulong>();
 	binary_op_return_type<simd<long double, A>, float>();
 	binary_op_return_type<simd<long double, A>, double>();
 
@@ -257,6 +251,24 @@ namespace simd_abi
 	    VERIFY((is_substitution_failure<vf64<ldouble>, ullong>));
 	    VERIFY((is_substitution_failure<simd<ldouble, A>, llong>));
 	    VERIFY((is_substitution_failure<simd<ldouble, A>, ullong>));
+	    if constexpr (sizeof(long) == sizeof(llong))
+	      {
+		VERIFY((is_substitution_failure<vldouble, long>));
+		VERIFY((is_substitution_failure<vldouble, ulong>));
+		VERIFY((is_substitution_failure<vf64<ldouble>, long>));
+		VERIFY((is_substitution_failure<vf64<ldouble>, ulong>));
+		VERIFY((is_substitution_failure<simd<ldouble, A>, long>));
+		VERIFY((is_substitution_failure<simd<ldouble, A>, ulong>));
+	      }
+	    else
+	      {
+		binary_op_return_type<vldouble, long>();
+		binary_op_return_type<vldouble, ulong>();
+		binary_op_return_type<vf64<long double>, long>();
+		binary_op_return_type<vf64<long double>, ulong>();
+		binary_op_return_type<simd<long double, A>, long>();
+		binary_op_return_type<simd<long double, A>, ulong>();
+	      }
 	  }
 	else
 	  {
@@ -266,6 +278,12 @@ namespace simd_abi
 	    binary_op_return_type<vf64<long double>, ullong>();
 	    binary_op_return_type<simd<long double, A>, llong>();
 	    binary_op_return_type<simd<long double, A>, ullong>();
+	    binary_op_return_type<vldouble, long>();
+	    binary_op_return_type<vldouble, ulong>();
+	    binary_op_return_type<vf64<long double>, long>();
+	    binary_op_return_type<vf64<long double>, ulong>();
+	    binary_op_return_type<simd<long double, A>, long>();
+	    binary_op_return_type<simd<long double, A>, ulong>();
 	  }
 
 	VERIFY((is_substitution_failure<vf64<long double>, vldouble>));