extern bool xtensa_b4const_or_zero (HOST_WIDE_INT);
extern bool xtensa_b4constu (HOST_WIDE_INT);
extern bool xtensa_mask_immediate (HOST_WIDE_INT);
-extern bool xtensa_const_ok_for_letter_p (HOST_WIDE_INT, int);
extern bool xtensa_mem_offset (unsigned, enum machine_mode);
/* Functions within xtensa.c that we reference. */
extern int constantpool_address_p (rtx);
extern int constantpool_mem_p (rtx);
extern void xtensa_extend_reg (rtx, rtx);
-extern bool xtensa_extra_constraint (rtx, int);
extern void xtensa_expand_conditional_branch (rtx *, enum rtx_code);
extern int xtensa_expand_conditional_move (rtx *, int);
extern int xtensa_expand_scc (rtx *);