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powerpc: Fix the compiler type used with C++ when -mabi=ieeelongdouble

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When compiling C++ code with -mabi=ieeelongdouble, KCtype is
unavailable and the long double type should be used instead.

This is also providing macro __HAVE_FLOAT128_UNLIKE_LDBL in order to
identify the kind of long double type is being used in the current
compilation unit.
Notice that bits/floatn.h cannot benefit from the new macro due to order
of header inclusion.

	* bits/floatn-common.h: Define __HAVE_FLOAT128_UNLIKE_LDBL.
	* math/math.h: Restrict the prototype definition for the functions
	issignaling(_Float128) and iszero(_Float128); and template
	__iseqsig_type<_Float128>, from __HAVE_DISTINCT_FLOAT128 to
	__HAVE_FLOAT128_UNLIKE_LDBL.
	* sysdeps/powerpc/bits/floatn.h [__HAVE_FLOAT128
	&& (!__GNUC_PREREQ (7, 0) || defined __cplusplus)
	&& __LDBL_MANT_DIG__ == 113]: Use long double suffix for
	__f128() constants; define the type _Float128 as long double;
	and reuse long double in __CFLOAT128.

Signed-off-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
This commit is contained in:
Tulio Magno Quites Machado Filho 2018-05-11 18:05:03 -03:00
parent b4d5b8b021
commit 5db7d705db
4 changed files with 43 additions and 13 deletions
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13
ChangeLog
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@ -1,3 +1,16 @@
2018-05-11 Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
* bits/floatn-common.h: Define __HAVE_FLOAT128_UNLIKE_LDBL.
* math/math.h: Restrict the prototype definition for the functions
issignaling(_Float128) and iszero(_Float128); and template
__iseqsig_type<_Float128>, from __HAVE_DISTINCT_FLOAT128 to
__HAVE_FLOAT128_UNLIKE_LDBL.
* sysdeps/powerpc/bits/floatn.h [__HAVE_FLOAT128
&& (!__GNUC_PREREQ (7, 0) || defined __cplusplus)
&& __LDBL_MANT_DIG__ == 113]: Use long double suffix for
__f128() constants; define the type _Float128 as long double;
and reuse long double in __CFLOAT128.
2018-05-11 Joseph Myers <joseph@codesourcery.com>
* sysdeps/generic/math_private.h: Do not include

7
bits/floatn-common.h
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@ -56,6 +56,13 @@
#define __HAVE_DISTINCT_FLOAT64X 0
#define __HAVE_DISTINCT_FLOAT128X __HAVE_FLOAT128X
/* Defined to 1 if the corresponding _FloatN type is not binary compatible
with the corresponding ISO C type in the current compilation unit as
opposed to __HAVE_DISTINCT_FLOATN, which indicates the default types built
in glibc. */
#define __HAVE_FLOAT128_UNLIKE_LDBL (__HAVE_DISTINCT_FLOAT128 \
&& __LDBL_MANT_DIG__ != 113)
/* Defined to 1 if any _FloatN or _FloatNx types that are not
ABI-distinct are however distinct types at the C language level (so
for the purposes of __builtin_types_compatible_p and _Generic). */

12
math/math.h
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@ -989,7 +989,9 @@ issignaling (long double __val)
return __issignalingl (__val);
# endif
}
# if __HAVE_DISTINCT_FLOAT128
# if __HAVE_FLOAT128_UNLIKE_LDBL
/* When using an IEEE 128-bit long double, _Float128 is defined as long double
in C++. */
inline int issignaling (_Float128 __val) { return __issignalingf128 (__val); }
# endif
} /* extern C++ */
@ -1027,7 +1029,9 @@ iszero (long double __val)
return __fpclassifyl (__val) == FP_ZERO;
# endif
}
# if __HAVE_DISTINCT_FLOAT128
# if __HAVE_FLOAT128_UNLIKE_LDBL
/* When using an IEEE 128-bit long double, _Float128 is defined as long double
in C++. */
inline int
iszero (_Float128 __val)
{
@ -1517,7 +1521,9 @@ template<> struct __iseqsig_type<long double>
}
};
# if __HAVE_DISTINCT_FLOAT128
# if __HAVE_FLOAT128_UNLIKE_LDBL
/* When using an IEEE 128-bit long double, _Float128 is defined as long double
in C++. */
template<> struct __iseqsig_type<_Float128>
{
static int __call (_Float128 __x, _Float128 __y) throw ()

24
sysdeps/powerpc/bits/floatn.h
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@ -33,7 +33,8 @@
#endif
/* Defined to 1 if __HAVE_FLOAT128 is 1 and the type is ABI-distinct
from the default float, double and long double types in this glibc. */
from the default float, double and long double types in this glibc, i.e.
calls to the binary128 functions go to *f128 symbols instead of *l. */
#if __HAVE_FLOAT128
# define __HAVE_DISTINCT_FLOAT128 1
#else
@ -58,7 +59,11 @@
# if __HAVE_FLOAT128
# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
/* The literal suffix (f128) exist for powerpc only since GCC 7.0. */
# define __f128(x) x##q
# if __LDBL_MANT_DIG__ == 113
# define __f128(x) x##l
# else
# define __f128(x) x##q
# endif
# else
# define __f128(x) x##f128
# endif
@ -66,8 +71,13 @@
/* Defined to a complex binary128 type if __HAVE_FLOAT128 is 1. */
# if __HAVE_FLOAT128
# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
/* Add a typedef for older GCC compilers which don't natively support
# if __LDBL_MANT_DIG__ == 113 && defined __cplusplus
typedef long double _Float128;
# define __CFLOAT128 _Complex long double
# elif !__GNUC_PREREQ (7, 0) || defined __cplusplus
/* The type _Float128 exist for powerpc only since GCC 7.0. */
typedef __float128 _Float128;
/* Add a typedef for older GCC and C++ compilers which don't natively support
_Complex _Float128. */
typedef _Complex float __cfloat128 __attribute__ ((__mode__ (__KC__)));
# define __CFLOAT128 __cfloat128
@ -78,12 +88,6 @@ typedef _Complex float __cfloat128 __attribute__ ((__mode__ (__KC__)));
/* The remaining of this file provides support for older compilers. */
# if __HAVE_FLOAT128
/* The type _Float128 exist for powerpc only since GCC 7.0. */
# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
typedef __float128 _Float128;
# endif
/* Builtin __builtin_huge_valf128 doesn't exist before GCC 7.0. */
# if !__GNUC_PREREQ (7, 0)
# define __builtin_huge_valf128() ((_Float128) __builtin_huge_val ())