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authorTulio Magno Quites Machado Filho <tuliom@linux.ibm.com>2018-05-11 18:05:03 -0300
committerTulio Magno Quites Machado Filho <tuliom@linux.ibm.com>2018-05-11 18:05:03 -0300
commit5db7d705db472f47a349fe342a8d7150ec922786 (patch)
treebd3d1a77f9d27ccacca0dcdb13313fd8a191b2ce /sysdeps/powerpc
parentb4d5b8b02133e0c317e6c836b51bbee3b00877b8 (diff)
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powerpc: Fix the compiler type used with C++ when -mabi=ieeelongdouble
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>
Diffstat (limited to 'sysdeps/powerpc')
-rw-r--r--sysdeps/powerpc/bits/floatn.h24
1 files changed, 14 insertions, 10 deletions
diff --git a/sysdeps/powerpc/bits/floatn.h b/sysdeps/powerpc/bits/floatn.h
index c3834096e3..c6d8b9b9b3 100644
--- a/sysdeps/powerpc/bits/floatn.h
+++ b/sysdeps/powerpc/bits/floatn.h
@@ -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 ())