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;; Operand and operator predicates for the GCC CRIS port.

;; Copyright (C) 2005, 2007 Free Software Foundation, Inc.

;; This file is part of GCC.

;;

;; GCC is free software; you can redistribute it and/or modify

;; it under the terms of the GNU General Public License as published by

;; the Free Software Foundation; either version 3, or (at your option)

;; any later version.

;;

;; GCC is distributed in the hope that it will be useful,

;; but WITHOUT ANY WARRANTY; without even the implied warranty of

;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

;; GNU General Public License for more details.

;;

;; You should have received a copy of the GNU General Public License

;; along with GCC; see the file COPYING3.  If not see

;; .

;; Operator predicates.

(define_predicate "cris_orthogonal_operator"

  (match_code "plus, minus, ior, and, umin"))

(define_predicate "cris_commutative_orth_op"

  (match_code "plus, ior, and, umin"))

;; By the name, you might think we should include MULT.  We don't because

;; it doesn't accept the same addressing modes as the others (only

;; registers) and there's also the problem of handling TARGET_MUL_BUG.

(define_predicate "cris_operand_extend_operator"

  (match_code "plus, minus, umin"))

(define_predicate "cris_additive_operand_extend_operator"

  (match_code "plus, minus"))

(define_predicate "cris_extend_operator"

  (match_code "zero_extend, sign_extend"))

(define_predicate "cris_plus_or_bound_operator"

  (match_code "plus, umin"))

;; Used as an operator to get a handle on a already-known-valid MEM rtx:es

;; (no need to validate the address), where some address expression parts

;; have their own match_operand.

(define_predicate "cris_mem_op"

  (match_code "mem"))

(define_predicate "cris_load_multiple_op"

  (and (match_code "parallel")

       (match_test "cris_movem_load_rest_p (op, 0)")))

(define_predicate "cris_store_multiple_op"

  (and (match_code "parallel")

       (match_test "cris_store_multiple_op_p (op)")))

;; Operand helper predicates.

(define_predicate "cris_bdap_const_operand"

  (and (match_code "label_ref, symbol_ref, const_int, const_double, const")

       (ior (not (match_test "flag_pic"))

            (match_test "cris_valid_pic_const (op)"))))

(define_predicate "cris_simple_address_operand"

  (ior (match_operand:SI 0 "register_operand")

       (and (match_code "post_inc")

            (match_test "register_operand (XEXP (op, 0), Pmode)"))))

(define_predicate "cris_simple_operand"

  (ior (match_operand 0 "register_operand")

       (and (match_code "mem")

            (match_test "cris_simple_address_operand (XEXP (op, 0),

                                                      Pmode)"))))

;; The caller needs to use :SI.

(define_predicate "cris_bdap_sign_extend_operand"

; Disabled until 

; or  is committed.

  (match_test "0"))

;  (and (match_code "sign_extend")

;       (and (match_test "MEM_P (XEXP (op, 0))")

;           (match_test "cris_simple_address_operand (XEXP (XEXP (op, 0), 0),

;                                                     Pmode)"))))

;; FIXME: Should not have to test for 1.

(define_predicate "cris_scale_int_operand"

  (and (match_code "const_int")

       (ior (ior (match_test "op == GEN_INT (4)")

                 (match_test "op == const2_rtx"))

            (match_test "op == const1_rtx"))))

;; FIXME: Should be able to assume (reg int).

(define_predicate "cris_biap_mult_operand"

  (and (match_code "mult")

       (ior (and (match_test "register_operand (XEXP (op, 0), Pmode)")

                 (match_test "cris_scale_int_operand (XEXP (op, 1), Pmode)"))

            (and (match_test "cris_scale_int_operand (XEXP (op, 0), Pmode)")

                 (match_test "register_operand (XEXP (op, 1), Pmode)")))))

;; Operand predicates.

;; This checks a part of an address, the one that is not a plain register

;; for an addressing mode using BDAP.

;; Allowed operands are either:

;; a) a register

;; b) a CONST operand (but not a symbol when generating PIC)

;; c) a [r] or [r+] in SImode, or sign-extend from HI or QI.

(define_predicate "cris_bdap_operand"

  (ior (match_operand 0 "cris_bdap_const_operand")

       (ior (match_operand:SI 0 "cris_simple_operand")

            (match_operand:SI 0 "cris_bdap_sign_extend_operand"))))

;; This is similar to cris_bdap_operand:

;; It checks a part of an address, the one that is not a plain register

;; for an addressing mode using BDAP or BIAP.

;; Allowed operands are either:

;; a) a register

;; b) a CONST operand (but not a symbol when generating PIC)

;; c) a mult of (1, 2 or 4) and a register

;; d) a [r] or [r+] in SImode, or sign-extend from HI or QI.  */

(define_predicate "cris_bdap_biap_operand"

  (ior (match_operand 0 "cris_bdap_operand")

       (match_operand 0 "cris_biap_mult_operand")))

;; Since with -fPIC, not all symbols are valid PIC symbols or indeed

;; general_operands, we have to have a predicate that matches it for the

;; "movsi" expander.

;; FIXME: Can s/special_// when PR 20413 is fixed.

(define_special_predicate "cris_general_operand_or_symbol"

  (ior (match_operand 0 "general_operand")

       (and (match_code "const, symbol_ref, label_ref")

            ; The following test is actually just an assertion.

            (match_test "cris_pic_symbol_type_of (op) != cris_no_symbol"))))

;; Since a PLT symbol is not a general_operand, we have to have a

;; predicate that matches it when we need it.  We use this in the expanded

;; "call" and "call_value" anonymous patterns.

(define_predicate "cris_general_operand_or_plt_symbol"

  (ior (match_operand 0 "general_operand")

       (and (match_code "const")

            (and (match_test "GET_CODE (XEXP (op, 0)) == UNSPEC")

                 (not (match_test "TARGET_AVOID_GOTPLT"))))))

;; This matches a (MEM (general_operand)) or

;; (MEM (cris_general_operand_or_symbol)).  The second one isn't a valid

;; memory_operand, so we need this predicate to recognize call

;; destinations before we change them to a PLT operand (by wrapping in

;; UNSPEC CRIS_UNSPEC_PLT).

(define_predicate "cris_mem_call_operand"

  (and (match_code "mem")

       (ior (match_operand 0 "memory_operand")

            (match_test "cris_general_operand_or_symbol (XEXP (op, 0),

                                                         Pmode)"))))