PPC/s390: [sim] Consistent support for C calls with up to 9 args

src/ppc/macro-assembler-ppc.cc

Index: src/ppc/macro-assembler-ppc.cc
diff --git a/src/ppc/macro-assembler-ppc.cc b/src/ppc/macro-assembler-ppc.cc
index 1d34e3d5d642dce0102cdde7ae9311a19f78700c..56f7bcb0432a91734240a9b944ca4104a44fde91 100644
--- a/src/ppc/macro-assembler-ppc.cc
+++ b/src/ppc/macro-assembler-ppc.cc
@@ -2960,6 +2960,7 @@ void MacroAssembler::CallCFunction(Register function, int num_arguments) {
 void MacroAssembler::CallCFunctionHelper(Register function,
                                          int num_reg_arguments,
                                          int num_double_arguments) {
+  DCHECK_LE(num_reg_arguments + num_double_arguments, kMaxCParameters);
   DCHECK(has_frame());
 
   // Just call directly. The function called cannot cause a GC, or