src/cpu/x86/vm/x86_32.ad

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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.

*** 3753,3763 **** // 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); %} // Location of C & interpreter return values c_return_value %{ assert( ideal_reg >= Op_RegI && ideal_reg <= Op_RegL, "only return normal values" ); --- 3753,3763 ---- // 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, /*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" );