[PATCH] [ARC] Add builtins for identifying floating point support

Currently for hard float we need to check for
 __ARC_FPU_SP__ || __ARC_FPU_DP__ and for soft float inverse of that.
So define single convenience macros for either cases.

gcc/
xxxx-xx-xx  Vineet Gupta  <vgupta@synopsyscom>

	* config/arc/arc-c.c (arc_cpu_cpp_builtins): Add
          __arc_hard_float__, __ARC_HARD_FLOAT__,
          __arc_soft_float__, __ARC_SOFT_FLOAT__

From-SVN: r277878

gcc/ChangeLog

+2019-11-06  Vineet Gupta  <vgupta@synopsys.com>
+
+	* config/arc/arc-c.c (arc_cpu_cpp_builtins) : Add
+	__arc_hard_float__, __ARC_HARD_FLOAT__,
+	__arc_soft_float__, __ARC_SOFT_FLOAT__
+
 2019-11-06  Andre Vieira  <andre.simoesdiasvieira@arm.com>
 
 	PR tree-optimization/92317

gcc/config/arc/arc-c.c

@@ -71,4 +71,14 @@ arc_cpu_cpp_builtins (cpp_reader * pfile)
   if (TARGET_BIG_ENDIAN)
     builtin_define ("__big_endian__");
 
+  if (TARGET_HARD_FLOAT)
+    {
+      builtin_define ("__arc_hard_float__");
+      builtin_define ("__ARC_HARD_FLOAT__");
+    }
+  else
+    {
+      builtin_define ("__arc_soft_float__");
+      builtin_define ("__ARC_SOFT_FLOAT__");
+    }
 }