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Fix iseqsig for _FloatN and _FloatNx in C++ with GCC 13
With GCC 13, _FloatN and _FloatNx types, when they exist, are distinct types like they are in C with GCC 7 and later, rather than typedefs for types such as float, double or long double. This breaks the templated iseqsig implementation for C++ in <math.h>, when used with types that were previously implemented as aliases. Add the necessary definitions for _Float32, _Float64, _Float128 (when the same format as long double), _Float32x and _Float64x in this case, so that iseqsig can be used with such types in C++ with GCC 13 as it could with previous GCC versions. Also add tests for calling iseqsig in C++ with arguments of such types (more minimal than existing tests, so that they can work with older GCC versions and without relying on any C++ library support for the types or on hardcoding details of their formats). The LDBL_MANT_DIG != 106 conditionals on some tests are because the type-generic comparison macros have undefined behavior when neither argument has a type whose set of values is a subset of those for the type of the other argument, which applies when one argument is IBM long double and the other is an IEEE format wider than binary64. Tested with build-many-glibcs.py glibcs build for aarch64-linux-gnu i686-linux-gnu mips-linux-gnu mips64-linux-gnu-n32 powerpc-linux-gnu powerpc64le-linux-gnu x86_64-linux-gnu.
This commit is contained in:
Joseph Myers
parent
609c9d0951
commit
ba70f69598
50
math/math.h
50
math/math.h
@ -1391,14 +1391,62 @@ template<> struct __iseqsig_type<long double>
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}
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};
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# if __HAVE_FLOAT128_UNLIKE_LDBL
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# if __HAVE_FLOAT32 && __GNUC_PREREQ (13, 0)
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template<> struct __iseqsig_type<_Float32>
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{
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static int __call (_Float32 __x, _Float32 __y) throw ()
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{
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return __iseqsigf (__x, __y);
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}
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};
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# endif
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# if __HAVE_FLOAT64 && __GNUC_PREREQ (13, 0)
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template<> struct __iseqsig_type<_Float64>
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{
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static int __call (_Float64 __x, _Float64 __y) throw ()
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{
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return __iseqsig (__x, __y);
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}
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};
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# endif
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# if __HAVE_FLOAT128_UNLIKE_LDBL || (__HAVE_FLOAT128 && __GNUC_PREREQ (13, 0))
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/* When using an IEEE 128-bit long double, _Float128 is defined as long double
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in C++. */
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template<> struct __iseqsig_type<_Float128>
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{
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static int __call (_Float128 __x, _Float128 __y) throw ()
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{
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# if __HAVE_FLOAT128_UNLIKE_LDBL
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return __iseqsigf128 (__x, __y);
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# else
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return __iseqsigl (__x, __y);
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# endif
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}
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};
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# endif
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# if __HAVE_FLOAT32X && __GNUC_PREREQ (13, 0)
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template<> struct __iseqsig_type<_Float32x>
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{
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static int __call (_Float32x __x, _Float32x __y) throw ()
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{
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return __iseqsig (__x, __y);
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}
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};
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# endif
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# if __HAVE_FLOAT64X && __GNUC_PREREQ (13, 0)
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template<> struct __iseqsig_type<_Float64x>
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{
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static int __call (_Float64x __x, _Float64x __y) throw ()
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{
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# if __HAVE_FLOAT64X_LONG_DOUBLE
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return __iseqsigl (__x, __y);
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# else
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return __iseqsigf128 (__x, __y);
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# endif
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}
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};
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# endif
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@ -17,6 +17,7 @@
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<https://www.gnu.org/licenses/>. */
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#define _GNU_SOURCE 1
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#include <float.h>
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#include <math.h>
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#include <stdio.h>
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@ -67,6 +68,20 @@ check_type ()
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}
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}
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/* Run minimal tests of iseqsig for a pair of types, without relying
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on C++ library support or knowledge of the representation. */
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template <class T1, class T2>
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static void
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check_type_minimal ()
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{
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T1 t1 = 0;
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T2 t2 = 0;
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CHECK (iseqsig (t1, t2), 1);
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t2 = 1;
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CHECK (iseqsig (t1, t2), 0);
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}
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#if __HAVE_DISTINCT_FLOAT128
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static void
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check_float128 ()
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@ -105,6 +120,281 @@ do_test (void)
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#if __HAVE_DISTINCT_FLOAT128
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check_float128 ();
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#endif
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#if __HAVE_FLOAT16
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check_type_minimal<float, _Float16> ();
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#endif
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#if __HAVE_FLOAT32
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check_type_minimal<float, _Float32> ();
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#endif
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#if __HAVE_FLOAT64
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check_type_minimal<float, _Float64> ();
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#endif
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#if __HAVE_FLOAT128
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check_type_minimal<float, _Float128> ();
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#endif
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#if __HAVE_FLOAT32X
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check_type_minimal<float, _Float32x> ();
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#endif
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#if __HAVE_FLOAT64X
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check_type_minimal<float, _Float64x> ();
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#endif
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#if __HAVE_FLOAT128X
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check_type_minimal<float, _Float128x> ();
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#endif
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#if __HAVE_FLOAT16
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check_type_minimal<double, _Float16> ();
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#endif
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#if __HAVE_FLOAT32
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check_type_minimal<double, _Float32> ();
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#endif
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#if __HAVE_FLOAT64
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check_type_minimal<double, _Float64> ();
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#endif
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#if __HAVE_FLOAT128
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check_type_minimal<double, _Float128> ();
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#endif
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#if __HAVE_FLOAT32X
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check_type_minimal<double, _Float32x> ();
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#endif
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#if __HAVE_FLOAT64X
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check_type_minimal<double, _Float64x> ();
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#endif
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#if __HAVE_FLOAT128X
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check_type_minimal<double, _Float128x> ();
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#endif
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#if __HAVE_FLOAT16
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check_type_minimal<long double, _Float16> ();
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#endif
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#if __HAVE_FLOAT32
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check_type_minimal<long double, _Float32> ();
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#endif
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#if __HAVE_FLOAT64
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check_type_minimal<long double, _Float64> ();
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#endif
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#if __HAVE_FLOAT128 && LDBL_MANT_DIG != 106
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check_type_minimal<long double, _Float128> ();
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#endif
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#if __HAVE_FLOAT32X
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check_type_minimal<long double, _Float32x> ();
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#endif
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#if __HAVE_FLOAT64X && LDBL_MANT_DIG != 106
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check_type_minimal<long double, _Float64x> ();
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#endif
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#if __HAVE_FLOAT128X && LDBL_MANT_DIG != 106
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check_type_minimal<long double, _Float128x> ();
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#endif
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#if __HAVE_FLOAT16
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check_type_minimal<_Float16, float> ();
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#endif
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#if __HAVE_FLOAT16
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check_type_minimal<_Float16, double> ();
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#endif
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#if __HAVE_FLOAT16
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check_type_minimal<_Float16, long double> ();
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#endif
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#if __HAVE_FLOAT16
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check_type_minimal<_Float16, _Float16> ();
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#endif
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#if __HAVE_FLOAT16 && __HAVE_FLOAT32
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check_type_minimal<_Float16, _Float32> ();
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#endif
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#if __HAVE_FLOAT16 && __HAVE_FLOAT64
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check_type_minimal<_Float16, _Float64> ();
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#endif
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#if __HAVE_FLOAT16 && __HAVE_FLOAT128
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check_type_minimal<_Float16, _Float128> ();
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#endif
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#if __HAVE_FLOAT16 && __HAVE_FLOAT32X
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check_type_minimal<_Float16, _Float32x> ();
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#endif
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#if __HAVE_FLOAT16 && __HAVE_FLOAT64X
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check_type_minimal<_Float16, _Float64x> ();
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#endif
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#if __HAVE_FLOAT16 && __HAVE_FLOAT128X
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check_type_minimal<_Float16, _Float128x> ();
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#endif
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#if __HAVE_FLOAT32
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check_type_minimal<_Float32, float> ();
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#endif
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#if __HAVE_FLOAT32
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check_type_minimal<_Float32, double> ();
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#endif
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#if __HAVE_FLOAT32
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check_type_minimal<_Float32, long double> ();
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#endif
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#if __HAVE_FLOAT32 && __HAVE_FLOAT16
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check_type_minimal<_Float32, _Float16> ();
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#endif
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#if __HAVE_FLOAT32
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check_type_minimal<_Float32, _Float32> ();
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#endif
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#if __HAVE_FLOAT32 && __HAVE_FLOAT64
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check_type_minimal<_Float32, _Float64> ();
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#endif
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#if __HAVE_FLOAT32 && __HAVE_FLOAT128
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check_type_minimal<_Float32, _Float128> ();
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#endif
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#if __HAVE_FLOAT32 && __HAVE_FLOAT32X
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check_type_minimal<_Float32, _Float32x> ();
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#endif
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#if __HAVE_FLOAT32 && __HAVE_FLOAT64X
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check_type_minimal<_Float32, _Float64x> ();
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#endif
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#if __HAVE_FLOAT32 && __HAVE_FLOAT128X
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check_type_minimal<_Float32, _Float128x> ();
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#endif
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#if __HAVE_FLOAT64
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check_type_minimal<_Float64, float> ();
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#endif
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#if __HAVE_FLOAT64
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check_type_minimal<_Float64, double> ();
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#endif
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#if __HAVE_FLOAT64
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check_type_minimal<_Float64, long double> ();
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#endif
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#if __HAVE_FLOAT64 && __HAVE_FLOAT16
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check_type_minimal<_Float64, _Float16> ();
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#endif
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#if __HAVE_FLOAT64 && __HAVE_FLOAT32
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check_type_minimal<_Float64, _Float32> ();
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#endif
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#if __HAVE_FLOAT64
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check_type_minimal<_Float64, _Float64> ();
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#endif
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#if __HAVE_FLOAT64 && __HAVE_FLOAT128
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check_type_minimal<_Float64, _Float128> ();
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#endif
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#if __HAVE_FLOAT64 && __HAVE_FLOAT32X
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check_type_minimal<_Float64, _Float32x> ();
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#endif
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#if __HAVE_FLOAT64 && __HAVE_FLOAT64X
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check_type_minimal<_Float64, _Float64x> ();
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#endif
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#if __HAVE_FLOAT64 && __HAVE_FLOAT128X
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check_type_minimal<_Float64, _Float128x> ();
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#endif
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#if __HAVE_FLOAT128
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check_type_minimal<_Float128, float> ();
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#endif
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#if __HAVE_FLOAT128
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check_type_minimal<_Float128, double> ();
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#endif
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#if __HAVE_FLOAT128 && LDBL_MANT_DIG != 106
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check_type_minimal<_Float128, long double> ();
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#endif
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#if __HAVE_FLOAT128 && __HAVE_FLOAT16
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check_type_minimal<_Float128, _Float16> ();
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#endif
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#if __HAVE_FLOAT128 && __HAVE_FLOAT32
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check_type_minimal<_Float128, _Float32> ();
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#endif
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#if __HAVE_FLOAT128 && __HAVE_FLOAT64
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check_type_minimal<_Float128, _Float64> ();
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#endif
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#if __HAVE_FLOAT128
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check_type_minimal<_Float128, _Float128> ();
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#endif
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#if __HAVE_FLOAT128 && __HAVE_FLOAT32X
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check_type_minimal<_Float128, _Float32x> ();
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#endif
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#if __HAVE_FLOAT128 && __HAVE_FLOAT64X
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check_type_minimal<_Float128, _Float64x> ();
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#endif
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#if __HAVE_FLOAT128 && __HAVE_FLOAT128X
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check_type_minimal<_Float128, _Float128x> ();
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#endif
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#if __HAVE_FLOAT32X
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check_type_minimal<_Float32x, float> ();
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#endif
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#if __HAVE_FLOAT32X
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check_type_minimal<_Float32x, double> ();
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#endif
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#if __HAVE_FLOAT32X
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check_type_minimal<_Float32x, long double> ();
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#endif
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#if __HAVE_FLOAT32X && __HAVE_FLOAT16
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check_type_minimal<_Float32x, _Float16> ();
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#endif
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#if __HAVE_FLOAT32X && __HAVE_FLOAT32
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check_type_minimal<_Float32x, _Float32> ();
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#endif
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#if __HAVE_FLOAT32X && __HAVE_FLOAT64
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check_type_minimal<_Float32x, _Float64> ();
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#endif
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#if __HAVE_FLOAT32X && __HAVE_FLOAT128
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check_type_minimal<_Float32x, _Float128> ();
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#endif
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#if __HAVE_FLOAT32X
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check_type_minimal<_Float32x, _Float32x> ();
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#endif
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#if __HAVE_FLOAT32X && __HAVE_FLOAT64X
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check_type_minimal<_Float32x, _Float64x> ();
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#endif
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#if __HAVE_FLOAT32X && __HAVE_FLOAT128X
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check_type_minimal<_Float32x, _Float128x> ();
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#endif
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#if __HAVE_FLOAT64X
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check_type_minimal<_Float64x, float> ();
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#endif
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#if __HAVE_FLOAT64X
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check_type_minimal<_Float64x, double> ();
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#endif
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#if __HAVE_FLOAT64X && LDBL_MANT_DIG != 106
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check_type_minimal<_Float64x, long double> ();
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#endif
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#if __HAVE_FLOAT64X && __HAVE_FLOAT16
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check_type_minimal<_Float64x, _Float16> ();
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#endif
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#if __HAVE_FLOAT64X && __HAVE_FLOAT32
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check_type_minimal<_Float64x, _Float32> ();
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#endif
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#if __HAVE_FLOAT64X && __HAVE_FLOAT64
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check_type_minimal<_Float64x, _Float64> ();
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#endif
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#if __HAVE_FLOAT64X && __HAVE_FLOAT128
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check_type_minimal<_Float64x, _Float128> ();
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#endif
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#if __HAVE_FLOAT64X && __HAVE_FLOAT32X
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check_type_minimal<_Float64x, _Float32x> ();
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#endif
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#if __HAVE_FLOAT64X
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check_type_minimal<_Float64x, _Float64x> ();
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#endif
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#if __HAVE_FLOAT64X && __HAVE_FLOAT128X
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check_type_minimal<_Float64x, _Float128x> ();
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#endif
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#if __HAVE_FLOAT128X
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check_type_minimal<_Float128x, float> ();
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#endif
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#if __HAVE_FLOAT128X
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check_type_minimal<_Float128x, double> ();
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#endif
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#if __HAVE_FLOAT128X && LDBL_MANT_DIG != 106
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check_type_minimal<_Float128x, long double> ();
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#endif
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#if __HAVE_FLOAT128X && __HAVE_FLOAT16
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check_type_minimal<_Float128x, _Float16> ();
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#endif
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#if __HAVE_FLOAT128X && __HAVE_FLOAT32
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check_type_minimal<_Float128x, _Float32> ();
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#endif
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#if __HAVE_FLOAT128X && __HAVE_FLOAT64
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check_type_minimal<_Float128x, _Float64> ();
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#endif
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#if __HAVE_FLOAT128X && __HAVE_FLOAT128
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check_type_minimal<_Float128x, _Float128> ();
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#endif
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#if __HAVE_FLOAT128X && __HAVE_FLOAT32X
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check_type_minimal<_Float128x, _Float32x> ();
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#endif
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#if __HAVE_FLOAT128X && __HAVE_FLOAT64X
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check_type_minimal<_Float128x, _Float64x> ();
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#endif
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#if __HAVE_FLOAT128X
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check_type_minimal<_Float128x, _Float128x> ();
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#endif
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return 0;
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}
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