extern enum machine_mode ix86_fp_compare_mode PARAMS ((enum rtx_code));
-extern int x86_64_sign_extended_value PARAMS ((rtx, int));
+extern int x86_64_sign_extended_value PARAMS ((rtx));
extern int x86_64_zero_extended_value PARAMS ((rtx));
extern rtx ix86_libcall_value PARAMS ((enum machine_mode));
extern bool ix86_function_value_regno_p PARAMS ((int));