Print this page
rev 5188 : 8024344: PPC64 (part 112): C argument in register AND stack slot.
Summary: On PPC, the first 13 floating point arguments to C calls are passed in floating point registers. Also, all but the first 8 arguments are passed on the stack. So there can be floating point arguments that are passed on the stack and in a register. We duplicate the regs datastructure in c_calling_convention() to represent this.

@@ -3753,11 +3753,11 @@
   // offsets are based on outgoing arguments, i.e. a CALLER setting up
   // arguments for a CALLEE.  Incoming stack arguments are
   // automatically biased by the preserve_stack_slots field above.
   c_calling_convention %{
     // This is obviously always outgoing
-    (void) SharedRuntime::c_calling_convention(sig_bt, regs, length);
+    (void) SharedRuntime::c_calling_convention(sig_bt, regs, /*regs2=*/NULL, length);
   // Location of C & interpreter return values
   c_return_value %{
     assert( ideal_reg >= Op_RegI && ideal_reg <= Op_RegL, "only return normal values" );