libstdc++: Replace uses of _GLIBCXX_USE_INT128 in testsuite

Since r12-435 the _GLIBCXX_USE_INT128 macro is never defined, so all
uses of it in the testsuite are wrong. The tests should be checking
__SIZEOF_INT128__ instead.

Also add some tests for an INT_3 type, which were missing.

libstdc++-v3/ChangeLog:

	* testsuite/18_support/numeric_limits/40856.cc: Replace use of
	_GLIBCXX_USE_INT128.
	* testsuite/18_support/numeric_limits/dr559.cc: Likewise.
	* testsuite/18_support/numeric_limits/lowest.cc: Likewise.
	* testsuite/18_support/numeric_limits/max_digits10.cc: Likewise.
	* testsuite/20_util/is_floating_point/value.cc: Likewise.
	* testsuite/20_util/is_integral/value.cc: Likewise.
	* testsuite/20_util/is_signed/value.cc: Likewise.
	* testsuite/20_util/is_unsigned/value.cc: Likewise.
	* testsuite/20_util/make_signed/requirements/typedefs-1.cc:
	Likewise.
	* testsuite/20_util/make_signed/requirements/typedefs-2.cc:
	Likewise.
	* testsuite/20_util/make_unsigned/requirements/typedefs-1.cc:
	Likewise.
	* testsuite/20_util/make_unsigned/requirements/typedefs-2.cc:
	Likewise.
	* testsuite/20_util/type_identity/requirements/typedefs.cc:
	Likewise.
	* testsuite/26_numerics/bit/bit.count/countl_one.cc: Likewise.
	* testsuite/26_numerics/bit/bit.count/countl_zero.cc: Likewise.
	* testsuite/26_numerics/bit/bit.count/countr_one.cc: Likewise.
	* testsuite/26_numerics/bit/bit.count/countr_zero.cc: Likewise.
	* testsuite/26_numerics/bit/bit.count/popcount.cc: Likewise.
	* testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc: Likewise.
	* testsuite/26_numerics/bit/bit.pow.two/bit_floor.cc: Likewise.
	* testsuite/26_numerics/bit/bit.pow.two/bit_width.cc: Likewise.
	* testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc:
	Likewise.
	* testsuite/26_numerics/bit/bit.rotate/rotl.cc: Likewise.

libstdc++-v3/ChangeLog:

	* testsuite/26_numerics/bit/bit.rotate/rotr.cc:
	* testsuite/util/testsuite_common_types.h:

25 files changed, 66 insertions, 26 deletions

diff --git a/libstdc++-v3/testsuite/18_support/numeric_limits/40856.cc b/libstdc++-v3/testsuite/18_support/numeric_limits/40856.cc
index 08564fbf174..ee1cf9c0cf8 100644
--- a/libstdc++-v3/testsuite/18_support/numeric_limits/40856.cc
+++ b/libstdc++-v3/testsuite/18_support/numeric_limits/40856.cc
@@ -19,8 +19,8 @@
 
 #include <limits>
 
-// libstdc++/40856 
-#if defined _GLIBCXX_USE_INT128 && ! defined __STRICT_ANSI__
+// libstdc++/40856
+#if defined __SIZEOF_INT128__
 static_assert(std::numeric_limits<__int128>::is_specialized == true, "");
 static_assert(std::numeric_limits<unsigned __int128>::is_specialized == true,
 	      "");
diff --git a/libstdc++-v3/testsuite/18_support/numeric_limits/dr559.cc b/libstdc++-v3/testsuite/18_support/numeric_limits/dr559.cc
index a90cc46b186..96a63676739 100644
--- a/libstdc++-v3/testsuite/18_support/numeric_limits/dr559.cc
+++ b/libstdc++-v3/testsuite/18_support/numeric_limits/dr559.cc
@@ -98,7 +98,7 @@ int main()
   do_test<long long>();
   do_test<unsigned long long>();
   // GNU Extensions.
-#ifdef _GLIBCXX_USE_INT128
+#ifdef __SIZEOF_INT128__
   do_test<__int128>();
   do_test<unsigned __int128>();
 #endif
diff --git a/libstdc++-v3/testsuite/18_support/numeric_limits/lowest.cc b/libstdc++-v3/testsuite/18_support/numeric_limits/lowest.cc
index 49c1c4d6953..b44dcf42826 100644
--- a/libstdc++-v3/testsuite/18_support/numeric_limits/lowest.cc
+++ b/libstdc++-v3/testsuite/18_support/numeric_limits/lowest.cc
@@ -74,7 +74,7 @@ void test01()
   do_test<unsigned long long>();
 
   // GNU Extensions.
-#ifdef _GLIBCXX_USE_INT128
+#ifdef __SIZEOF_INT128__
   do_test<__int128>();
   do_test<unsigned __int128>();
 #endif
diff --git a/libstdc++-v3/testsuite/18_support/numeric_limits/max_digits10.cc b/libstdc++-v3/testsuite/18_support/numeric_limits/max_digits10.cc
index a136439a761..bc7317c76a3 100644
--- a/libstdc++-v3/testsuite/18_support/numeric_limits/max_digits10.cc
+++ b/libstdc++-v3/testsuite/18_support/numeric_limits/max_digits10.cc
@@ -49,7 +49,7 @@ test01()
   VERIFY( std::numeric_limits<char32_t>::max_digits10 == 0 );
 
   // GNU Extensions.
-#ifdef _GLIBCXX_USE_INT128
+#ifdef __SIZEOF_INT128__
   VERIFY( std::numeric_limits<__int128>::max_digits10 == 0 );
   VERIFY( std::numeric_limits<unsigned __int128>::max_digits10 == 0 );
 #endif
diff --git a/libstdc++-v3/testsuite/20_util/is_floating_point/value.cc b/libstdc++-v3/testsuite/20_util/is_floating_point/value.cc
index 5dbdbf84d99..c84351c706f 100644
--- a/libstdc++-v3/testsuite/20_util/is_floating_point/value.cc
+++ b/libstdc++-v3/testsuite/20_util/is_floating_point/value.cc
@@ -53,7 +53,7 @@ void test01()
   static_assert(test_category<is_floating_point, __float128>(true), "");
 #endif
 
-#ifdef _GLIBCXX_USE_INT128
+#ifdef __SIZEOF_INT128__
   static_assert(test_category<is_floating_point, __int128>(false), "");
   static_assert(test_category<is_floating_point,
 		unsigned __int128>(false), "");
diff --git a/libstdc++-v3/testsuite/20_util/is_integral/value.cc b/libstdc++-v3/testsuite/20_util/is_integral/value.cc
index 46923262965..44962b55895 100644
--- a/libstdc++-v3/testsuite/20_util/is_integral/value.cc
+++ b/libstdc++-v3/testsuite/20_util/is_integral/value.cc
@@ -55,7 +55,7 @@ void test01()
 
 #ifndef __STRICT_ANSI__
   // GNU Extensions.
-#ifdef _GLIBCXX_USE_INT128
+#ifdef __SIZEOF_INT128__
   static_assert(test_category<is_integral, __int128>(true), "");
   static_assert(test_category<is_integral, unsigned __int128>(true), "");
 #endif
diff --git a/libstdc++-v3/testsuite/20_util/is_signed/value.cc b/libstdc++-v3/testsuite/20_util/is_signed/value.cc
index f55d0f62b3a..8d17e972090 100644
--- a/libstdc++-v3/testsuite/20_util/is_signed/value.cc
+++ b/libstdc++-v3/testsuite/20_util/is_signed/value.cc
@@ -51,7 +51,7 @@ void test01()
 
 #ifndef __STRICT_ANSI__
   // GNU Extensions.
-#ifdef _GLIBCXX_USE_INT128
+#ifdef __SIZEOF_INT128__
   static_assert(test_category<is_signed, __int128>(true), "");
   static_assert(test_category<is_signed, unsigned __int128>(false), "");
 #endif
diff --git a/libstdc++-v3/testsuite/20_util/is_unsigned/value.cc b/libstdc++-v3/testsuite/20_util/is_unsigned/value.cc
index bda79ecdb46..d682220358b 100644
--- a/libstdc++-v3/testsuite/20_util/is_unsigned/value.cc
+++ b/libstdc++-v3/testsuite/20_util/is_unsigned/value.cc
@@ -51,7 +51,7 @@ void test01()
 
 #ifndef __STRICT_ANSI__
   // GNU Extensions.
-#ifdef _GLIBCXX_USE_INT128
+#ifdef __SIZEOF_INT128__
   static_assert(test_category<is_unsigned, unsigned __int128>(true), "");
   static_assert(test_category<is_unsigned, __int128>(false), "");
 #endif
diff --git a/libstdc++-v3/testsuite/20_util/make_signed/requirements/typedefs-1.cc b/libstdc++-v3/testsuite/20_util/make_signed/requirements/typedefs-1.cc
index 87b6155564a..c010c9701df 100644
--- a/libstdc++-v3/testsuite/20_util/make_signed/requirements/typedefs-1.cc
+++ b/libstdc++-v3/testsuite/20_util/make_signed/requirements/typedefs-1.cc
@@ -68,7 +68,7 @@ void test01()
 
 #ifndef __STRICT_ANSI__
   // GNU Extensions.
-#ifdef _GLIBCXX_USE_INT128
+#ifdef __SIZEOF_INT128__
   typedef make_signed<unsigned __int128>::type  test25_type;
   static_assert( is_same<test25_type, __int128>::value,
                  "make_signed<unsigned __int128>" );
diff --git a/libstdc++-v3/testsuite/20_util/make_signed/requirements/typedefs-2.cc b/libstdc++-v3/testsuite/20_util/make_signed/requirements/typedefs-2.cc
index 879e19f9779..0edf3d648b5 100644
--- a/libstdc++-v3/testsuite/20_util/make_signed/requirements/typedefs-2.cc
+++ b/libstdc++-v3/testsuite/20_util/make_signed/requirements/typedefs-2.cc
@@ -61,7 +61,7 @@ void test01()
 
 #ifndef __STRICT_ANSI__
   // GNU Extensions.
-#ifdef _GLIBCXX_USE_INT128
+#ifdef __SIZEOF_INT128__
   typedef make_signed<unsigned __int128>::type  test25_type;
   static_assert(is_same<test25_type, __int128>::value, "");
 
diff --git a/libstdc++-v3/testsuite/20_util/make_unsigned/requirements/typedefs-1.cc b/libstdc++-v3/testsuite/20_util/make_unsigned/requirements/typedefs-1.cc
index 3e4649a4f18..e437c53cd8e 100644
--- a/libstdc++-v3/testsuite/20_util/make_unsigned/requirements/typedefs-1.cc
+++ b/libstdc++-v3/testsuite/20_util/make_unsigned/requirements/typedefs-1.cc
@@ -62,7 +62,7 @@ void test01()
 
 #ifndef __STRICT_ANSI__
   // GNU Extensions.
-#ifdef _GLIBCXX_USE_INT128
+#ifdef __SIZEOF_INT128__
   typedef make_unsigned<unsigned __int128>::type test25_type;
   static_assert(is_same<test25_type, unsigned __int128>::value, "");
 
diff --git a/libstdc++-v3/testsuite/20_util/make_unsigned/requirements/typedefs-2.cc b/libstdc++-v3/testsuite/20_util/make_unsigned/requirements/typedefs-2.cc
index 36ec6365785..7e2b8c459e7 100644
--- a/libstdc++-v3/testsuite/20_util/make_unsigned/requirements/typedefs-2.cc
+++ b/libstdc++-v3/testsuite/20_util/make_unsigned/requirements/typedefs-2.cc
@@ -61,7 +61,7 @@ void test01()
 
 #ifndef __STRICT_ANSI__
   // GNU Extensions.
-#ifdef _GLIBCXX_USE_INT128
+#ifdef __SIZEOF_INT128__
   typedef make_unsigned<unsigned __int128>::type  test25_type;
   static_assert(is_same<test25_type, unsigned __int128>::value, "");
 
diff --git a/libstdc++-v3/testsuite/20_util/type_identity/requirements/typedefs.cc b/libstdc++-v3/testsuite/20_util/type_identity/requirements/typedefs.cc
index 302162c4f86..61f84118c63 100644
--- a/libstdc++-v3/testsuite/20_util/type_identity/requirements/typedefs.cc
+++ b/libstdc++-v3/testsuite/20_util/type_identity/requirements/typedefs.cc
@@ -86,7 +86,7 @@ void test01()
 
 #ifndef __STRICT_ANSI__
   // GNU Extensions.
-#ifdef _GLIBCXX_USE_INT128
+#ifdef __SIZEOF_INT128__
   static_assert(test<unsigned __int128>::value, "");
   static_assert(test<unsigned __int128>::value, "");
 #endif
diff --git a/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countl_one.cc b/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countl_one.cc
index 9412a80049f..5e2a314e13a 100644
--- a/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countl_one.cc
+++ b/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countl_one.cc
@@ -74,7 +74,7 @@ static_assert( test( X{} ).did_not_match() );
 enum E : unsigned { e };
 static_assert( test( e ).did_not_match() );
 
-#if !defined(__STRICT_ANSI__) && defined _GLIBCXX_USE_INT128
+#if !defined(__STRICT_ANSI__) && defined __SIZEOF_INT128__
 static_assert( test( (unsigned __int128)0 ) );
 static_assert( test( (__int128)0 ).did_not_match() );
 #endif
@@ -90,6 +90,10 @@ static_assert( test( (__GLIBCXX_TYPE_INT_N_1)0 ).did_not_match() );
 static_assert( test( (unsigned __GLIBCXX_TYPE_INT_N_2)0 ) );
 static_assert( test( (__GLIBCXX_TYPE_INT_N_2)0 ).did_not_match() );
 #endif
+#if defined(__GLIBCXX_TYPE_INT_N_3)
+static_assert( test( (unsigned __GLIBCXX_TYPE_INT_N_3)0 ) );
+static_assert( test( (__GLIBCXX_TYPE_INT_N_3)0 ).did_not_match() );
+#endif
 
 #include <cstddef>
 static_assert( test( (std::byte)0 ).did_not_match() );
diff --git a/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countl_zero.cc b/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countl_zero.cc
index e198f855439..dc4d2e6cbd2 100644
--- a/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countl_zero.cc
+++ b/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countl_zero.cc
@@ -71,7 +71,7 @@ static_assert( test( X{} ).did_not_match() );
 enum E : unsigned { e };
 static_assert( test( e ).did_not_match() );
 
-#if !defined(__STRICT_ANSI__) && defined _GLIBCXX_USE_INT128
+#if !defined(__STRICT_ANSI__) && defined __SIZEOF_INT128__
 static_assert( test( (unsigned __int128)0 ) );
 static_assert( test( (__int128)0 ).did_not_match() );
 #endif
@@ -87,6 +87,10 @@ static_assert( test( (__GLIBCXX_TYPE_INT_N_1)0 ).did_not_match() );
 static_assert( test( (unsigned __GLIBCXX_TYPE_INT_N_2)0 ) );
 static_assert( test( (__GLIBCXX_TYPE_INT_N_2)0 ).did_not_match() );
 #endif
+#if defined(__GLIBCXX_TYPE_INT_N_3)
+static_assert( test( (unsigned __GLIBCXX_TYPE_INT_N_3)0 ) );
+static_assert( test( (__GLIBCXX_TYPE_INT_N_3)0 ).did_not_match() );
+#endif
 
 #include <cstddef>
 static_assert( test( (std::byte)0 ).did_not_match() );
diff --git a/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countr_one.cc b/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countr_one.cc
index db0e76b3a39..677daa52c2d 100644
--- a/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countr_one.cc
+++ b/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countr_one.cc
@@ -73,7 +73,7 @@ static_assert( test( X{} ).did_not_match() );
 enum E : unsigned { e };
 static_assert( test( e ).did_not_match() );
 
-#if !defined(__STRICT_ANSI__) && defined _GLIBCXX_USE_INT128
+#if !defined(__STRICT_ANSI__) && defined __SIZEOF_INT128__
 static_assert( test( (unsigned __int128)0 ) );
 static_assert( test( (__int128)0 ).did_not_match() );
 #endif
@@ -89,6 +89,10 @@ static_assert( test( (__GLIBCXX_TYPE_INT_N_1)0 ).did_not_match() );
 static_assert( test( (unsigned __GLIBCXX_TYPE_INT_N_2)0 ) );
 static_assert( test( (__GLIBCXX_TYPE_INT_N_2)0 ).did_not_match() );
 #endif
+#if defined(__GLIBCXX_TYPE_INT_N_3)
+static_assert( test( (unsigned __GLIBCXX_TYPE_INT_N_3)0 ) );
+static_assert( test( (__GLIBCXX_TYPE_INT_N_3)0 ).did_not_match() );
+#endif
 
 #include <cstddef>
 static_assert( test( (std::byte)0 ).did_not_match() );
diff --git a/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countr_zero.cc b/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countr_zero.cc
index f273dcb4b4b..7f45fbc9d32 100644
--- a/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countr_zero.cc
+++ b/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countr_zero.cc
@@ -72,7 +72,7 @@ static_assert( test( X{} ).did_not_match() );
 enum E : unsigned { e };
 static_assert( test( e ).did_not_match() );
 
-#if !defined(__STRICT_ANSI__) && defined _GLIBCXX_USE_INT128
+#if !defined(__STRICT_ANSI__) && defined __SIZEOF_INT128__
 static_assert( test( (unsigned __int128)0 ) );
 static_assert( test( (__int128)0 ).did_not_match() );
 #endif
@@ -88,6 +88,10 @@ static_assert( test( (__GLIBCXX_TYPE_INT_N_1)0 ).did_not_match() );
 static_assert( test( (unsigned __GLIBCXX_TYPE_INT_N_2)0 ) );
 static_assert( test( (__GLIBCXX_TYPE_INT_N_2)0 ).did_not_match() );
 #endif
+#if defined(__GLIBCXX_TYPE_INT_N_3)
+static_assert( test( (unsigned __GLIBCXX_TYPE_INT_N_3)0 ) );
+static_assert( test( (__GLIBCXX_TYPE_INT_N_3)0 ).did_not_match() );
+#endif
 
 #include <cstddef>
 static_assert( test( (std::byte)0 ).did_not_match() );
diff --git a/libstdc++-v3/testsuite/26_numerics/bit/bit.count/popcount.cc b/libstdc++-v3/testsuite/26_numerics/bit/bit.count/popcount.cc
index 0f088fe6a7c..b37b3ef54a7 100644
--- a/libstdc++-v3/testsuite/26_numerics/bit/bit.count/popcount.cc
+++ b/libstdc++-v3/testsuite/26_numerics/bit/bit.count/popcount.cc
@@ -75,7 +75,7 @@ static_assert( test( X{} ).did_not_match() );
 enum E : unsigned { e };
 static_assert( test( e ).did_not_match() );
 
-#if !defined(__STRICT_ANSI__) && defined _GLIBCXX_USE_INT128
+#if !defined(__STRICT_ANSI__) && defined __SIZEOF_INT128__
 static_assert( test( (unsigned __int128)0 ) );
 static_assert( test( (__int128)0 ).did_not_match() );
 #endif
@@ -91,6 +91,10 @@ static_assert( test( (__GLIBCXX_TYPE_INT_N_1)0 ).did_not_match() );
 static_assert( test( (unsigned __GLIBCXX_TYPE_INT_N_2)0 ) );
 static_assert( test( (__GLIBCXX_TYPE_INT_N_2)0 ).did_not_match() );
 #endif
+#if defined(__GLIBCXX_TYPE_INT_N_3)
+static_assert( test( (unsigned __GLIBCXX_TYPE_INT_N_3)0 ) );
+static_assert( test( (__GLIBCXX_TYPE_INT_N_3)0 ).did_not_match() );
+#endif
 
 #include <cstddef>
 static_assert( test( (std::byte)0 ).did_not_match() );
diff --git a/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc b/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc
index 509fce4bb09..c6ed47fda07 100644
--- a/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc
+++ b/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc
@@ -107,7 +107,7 @@ static_assert( test( X{} ).did_not_match() );
 enum E : unsigned { e };
 static_assert( test( e ).did_not_match() );
 
-#if !defined(__STRICT_ANSI__) && defined _GLIBCXX_USE_INT128
+#if !defined(__STRICT_ANSI__) && defined __SIZEOF_INT128__
 static_assert( test( (unsigned __int128)0 ) );
 static_assert( test( (__int128)0 ).did_not_match() );
 #endif
diff --git a/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/bit_floor.cc b/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/bit_floor.cc
index d51555f323f..eb2b66b331c 100644
--- a/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/bit_floor.cc
+++ b/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/bit_floor.cc
@@ -79,7 +79,7 @@ static_assert( test( X{} ).did_not_match() );
 enum E : unsigned { e };
 static_assert( test( e ).did_not_match() );
 
-#if !defined(__STRICT_ANSI__) && defined _GLIBCXX_USE_INT128
+#if !defined(__STRICT_ANSI__) && defined __SIZEOF_INT128__
 static_assert( test( (unsigned __int128)0 ) );
 static_assert( test( (__int128)0 ).did_not_match() );
 #endif
@@ -95,6 +95,10 @@ static_assert( test( (__GLIBCXX_TYPE_INT_N_1)0 ).did_not_match() );
 static_assert( test( (unsigned __GLIBCXX_TYPE_INT_N_2)0 ) );
 static_assert( test( (__GLIBCXX_TYPE_INT_N_2)0 ).did_not_match() );
 #endif
+#if defined(__GLIBCXX_TYPE_INT_N_3)
+static_assert( test( (unsigned __GLIBCXX_TYPE_INT_N_3)0 ) );
+static_assert( test( (__GLIBCXX_TYPE_INT_N_3)0 ).did_not_match() );
+#endif
 
 #include <cstddef>
 static_assert( test( (std::byte)0 ).did_not_match() );
diff --git a/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/bit_width.cc b/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/bit_width.cc
index 8e91f5d0e0e..053f81b0c7d 100644
--- a/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/bit_width.cc
+++ b/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/bit_width.cc
@@ -79,7 +79,7 @@ static_assert( test( X{} ).did_not_match() );
 enum E : unsigned { e };
 static_assert( test( e ).did_not_match() );
 
-#if !defined(__STRICT_ANSI__) && defined _GLIBCXX_USE_INT128
+#if !defined(__STRICT_ANSI__) && defined __SIZEOF_INT128__
 static_assert( test( (unsigned __int128)0 ) );
 static_assert( test( (__int128)0 ).did_not_match() );
 #endif
@@ -95,6 +95,10 @@ static_assert( test( (__GLIBCXX_TYPE_INT_N_1)0 ).did_not_match() );
 static_assert( test( (unsigned __GLIBCXX_TYPE_INT_N_2)0 ) );
 static_assert( test( (__GLIBCXX_TYPE_INT_N_2)0 ).did_not_match() );
 #endif
+#if defined(__GLIBCXX_TYPE_INT_N_3)
+static_assert( test( (unsigned __GLIBCXX_TYPE_INT_N_3)0 ) );
+static_assert( test( (__GLIBCXX_TYPE_INT_N_3)0 ).did_not_match() );
+#endif
 
 #include <cstddef>
 static_assert( test( (std::byte)0 ).did_not_match() );
diff --git a/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc b/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc
index 756d57dbf85..6df9cec6665 100644
--- a/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc
+++ b/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc
@@ -127,7 +127,7 @@ static_assert( test( X{} ).did_not_match() );
 enum E : unsigned { e };
 static_assert( test( e ).did_not_match() );
 
-#if !defined(__STRICT_ANSI__) && defined _GLIBCXX_USE_INT128
+#if !defined(__STRICT_ANSI__) && defined __SIZEOF_INT128__
 static_assert( test( (unsigned __int128)0 ) );
 static_assert( test( (__int128)0 ).did_not_match() );
 #endif
@@ -143,6 +143,10 @@ static_assert( test( (__GLIBCXX_TYPE_INT_N_1)0 ).did_not_match() );
 static_assert( test( (unsigned __GLIBCXX_TYPE_INT_N_2)0 ) );
 static_assert( test( (__GLIBCXX_TYPE_INT_N_2)0 ).did_not_match() );
 #endif
+#if defined(__GLIBCXX_TYPE_INT_N_3)
+static_assert( test( (unsigned __GLIBCXX_TYPE_INT_N_3)0 ) );
+static_assert( test( (__GLIBCXX_TYPE_INT_N_3)0 ).did_not_match() );
+#endif
 
 #include <cstddef>
 static_assert( test( (std::byte)0 ).did_not_match() );
diff --git a/libstdc++-v3/testsuite/26_numerics/bit/bit.rotate/rotl.cc b/libstdc++-v3/testsuite/26_numerics/bit/bit.rotate/rotl.cc
index 6022b9b3834..8a879eb85b2 100644
--- a/libstdc++-v3/testsuite/26_numerics/bit/bit.rotate/rotl.cc
+++ b/libstdc++-v3/testsuite/26_numerics/bit/bit.rotate/rotl.cc
@@ -104,7 +104,7 @@ static_assert( test( X{} ).did_not_match() );
 enum E : unsigned { e };
 static_assert( test( e ).did_not_match() );
 
-#if !defined(__STRICT_ANSI__) && defined _GLIBCXX_USE_INT128
+#if !defined(__STRICT_ANSI__) && defined __SIZEOF_INT128__
 static_assert( test( (unsigned __int128)0 ) );
 static_assert( test( (__int128)0 ).did_not_match() );
 #endif
@@ -120,6 +120,10 @@ static_assert( test( (__GLIBCXX_TYPE_INT_N_1)0 ).did_not_match() );
 static_assert( test( (unsigned __GLIBCXX_TYPE_INT_N_2)0 ) );
 static_assert( test( (__GLIBCXX_TYPE_INT_N_2)0 ).did_not_match() );
 #endif
+#if defined(__GLIBCXX_TYPE_INT_N_3)
+static_assert( test( (unsigned __GLIBCXX_TYPE_INT_N_3)0 ) );
+static_assert( test( (__GLIBCXX_TYPE_INT_N_3)0 ).did_not_match() );
+#endif
 
 #include <cstddef>
 static_assert( test( (std::byte)0 ).did_not_match() );
diff --git a/libstdc++-v3/testsuite/26_numerics/bit/bit.rotate/rotr.cc b/libstdc++-v3/testsuite/26_numerics/bit/bit.rotate/rotr.cc
index a77c45d9786..46c20636cf5 100644
--- a/libstdc++-v3/testsuite/26_numerics/bit/bit.rotate/rotr.cc
+++ b/libstdc++-v3/testsuite/26_numerics/bit/bit.rotate/rotr.cc
@@ -106,7 +106,7 @@ static_assert( test( X{} ).did_not_match() );
 enum E : unsigned { e };
 static_assert( test( e ).did_not_match() );
 
-#if !defined(__STRICT_ANSI__) && defined _GLIBCXX_USE_INT128
+#if !defined(__STRICT_ANSI__) && defined __SIZEOF_INT128__
 static_assert( test( (unsigned __int128)0 ) );
 static_assert( test( (__int128)0 ).did_not_match() );
 #endif
@@ -122,6 +122,10 @@ static_assert( test( (__GLIBCXX_TYPE_INT_N_1)0 ).did_not_match() );
 static_assert( test( (unsigned __GLIBCXX_TYPE_INT_N_2)0 ) );
 static_assert( test( (__GLIBCXX_TYPE_INT_N_2)0 ).did_not_match() );
 #endif
+#if defined(__GLIBCXX_TYPE_INT_N_3)
+static_assert( test( (unsigned __GLIBCXX_TYPE_INT_N_3)0 ) );
+static_assert( test( (__GLIBCXX_TYPE_INT_N_3)0 ).did_not_match() );
+#endif
 
 #include <cstddef>
 static_assert( test( (std::byte)0 ).did_not_match() );
diff --git a/libstdc++-v3/testsuite/util/testsuite_common_types.h b/libstdc++-v3/testsuite/util/testsuite_common_types.h
index 9a3152b3a84..392264fd207 100644
--- a/libstdc++-v3/testsuite/util/testsuite_common_types.h
+++ b/libstdc++-v3/testsuite/util/testsuite_common_types.h
@@ -327,7 +327,7 @@ namespace __gnu_test
 #else
     typedef node<null_type> char8_typelist;
 #endif
-# if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_INT128)
+# if !defined(__STRICT_ANSI__) && defined(__SIZEOF_INT128__)
     __extension__ typedef __int128            a17;
     __extension__ typedef unsigned __int128   a18;
     typedef node<_GLIBCXX_TYPELIST_CHAIN2(a17, a18)> int128_typelist;