This patch is the machine independent patch for libgcc to add IEEE 128-bit
floating point to the PowerPC.
This patch allows the PowerPC port to override the TFtype in quad.h to allow it
to use __float128 instead of attribute ((TF)). On most of the PowerPC systems,
TFmode by default is the IBM extended double format.
2014-07-15 Michael Meissner <meiss...@linux.vnet.ibm.com>
* soft-fp/quad.h (TFtype): Allow TFmode to be overridden by the
machine dependent files.
--
Michael Meissner, IBM
IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA
email: meiss...@linux.vnet.ibm.com, phone: +1 (978) 899-4797
Index: libgcc/soft-fp/quad.h
===================================================================
--- libgcc/soft-fp/quad.h
(.../svn+ssh://meiss...@gcc.gnu.org/svn/gcc/trunk) (revision 212529)
+++ libgcc/soft-fp/quad.h (working copy)
@@ -66,7 +66,13 @@
#define _FP_HIGHBIT_DW_Q \
((_FP_W_TYPE) 1 << (_FP_WFRACBITS_DW_Q - 1) % _FP_W_TYPE_SIZE)
+/* Allow machine to override the name of the 128-bit floating point type.
+ PowerPC long double historically used a pair of doubles on Linux/BSD
+ systems, so use the __float128 type if it is available, instead of
+ TFmode. */
+#ifndef TFtype
typedef float TFtype __attribute__ ((mode (TF)));
+#endif
#if _FP_W_TYPE_SIZE < 64
