[PATCH], PowerPC IEEE 128-bit patch #7 (revised #2), Subpatch #08
Michael Meissner
meissner@linux.vnet.ibm.com
Fri Oct 23 17:47:00 GMT 2015
This patch adds support for using 'q' or 'Q' as a suffix for __float128
constants, which is compatible with the existing x86_64 implmenetation of their
__float128 support.
I have built the compiler with this patch and the previous subpatches (1-7). I
have bootstrapped the compiler with all 16 subpatches installed, and there were
no regressions. Is it ok to install in the trunk?
2015-10-22 Michael Meissner <meissner@linux.vnet.ibm.com>
* config/rs6000/rs6000.c (TARGET_C_MODE_FOR_SUFFIX): Define 'q'
and 'Q' as the suffix to use for IEEE 128-bit floating point
constants with -mfloat128.
(rs6000_c_mode_for_suffix): Likewise.
--
Michael Meissner, IBM
IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA
email: meissner@linux.vnet.ibm.com, phone: +1 (978) 899-4797
-------------- next part --------------
Index: gcc/config/rs6000/rs6000.c
===================================================================
--- gcc/config/rs6000/rs6000.c (revision 229192)
+++ gcc/config/rs6000/rs6000.c (working copy)
@@ -1674,6 +1674,9 @@ static const struct attribute_spec rs600
#undef TARGET_OFFLOAD_OPTIONS
#define TARGET_OFFLOAD_OPTIONS rs6000_offload_options
+
+#undef TARGET_C_MODE_FOR_SUFFIX
+#define TARGET_C_MODE_FOR_SUFFIX rs6000_c_mode_for_suffix
/* Processor table. */
@@ -33308,6 +33311,26 @@ rs6000_vector_mode_supported_p (machine_
return false;
}
+/* Target hook for c_mode_for_suffix. */
+static machine_mode
+rs6000_c_mode_for_suffix (char suffix)
+{
+ if (TARGET_FLOAT128)
+ {
+ if (suffix == 'q' || suffix == 'Q')
+ return (FLOAT128_IEEE_P (TFmode)) ? TFmode : KFmode;
+
+ /* At the moment, we are not defining a suffix for IBM extended double.
+ If/when the default for -mabi=ieeelongdouble is changed, and we want
+ to support __ibm128 constants in legacy library code, we may need to
+ re-evalaute this decision. Currently, c-lex.c only supports 'w' and
+ 'q' as machine dependent suffixes. The x86_64 port uses 'w' for
+ __float80 constants. */
+ }
+
+ return VOIDmode;
+}
+
/* Target hook for invalid_arg_for_unprototyped_fn. */
static const char *
invalid_arg_for_unprototyped_fn (const_tree typelist, const_tree funcdecl, const_tree val)
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