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;; Predicate definitions for Xtensa.

;; Copyright (C) 2005 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 2, 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 COPYING.  If not, write to

;; the Free Software Foundation, 51 Franklin Street, Fifth Floor,

;; Boston, MA 02110-1301, USA.

(define_predicate "add_operand"

  (ior (and (match_code "const_int")

            (match_test "xtensa_simm8 (INTVAL (op))

                         || xtensa_simm8x256 (INTVAL (op))"))

       (match_operand 0 "register_operand")))

(define_predicate "arith_operand"

  (ior (and (match_code "const_int")

            (match_test "xtensa_simm8 (INTVAL (op))"))

       (match_operand 0 "register_operand")))

;; Non-immediate operand excluding the constant pool.

(define_predicate "nonimmed_operand"

  (ior (and (match_operand 0 "memory_operand")

            (match_test "!constantpool_address_p (XEXP (op, 0))"))

       (match_operand 0 "register_operand")))

;; Memory operand excluding the constant pool.

(define_predicate "mem_operand"

  (and (match_operand 0 "memory_operand")

       (match_test "!constantpool_address_p (XEXP (op, 0))")))

(define_predicate "mask_operand"

  (ior (and (match_code "const_int")

            (match_test "xtensa_mask_immediate (INTVAL (op))"))

       (match_operand 0 "register_operand")))

(define_predicate "extui_fldsz_operand"

  (and (match_code "const_int")

       (match_test "xtensa_mask_immediate ((1 << INTVAL (op)) - 1)")))

(define_predicate "sext_operand"

  (if_then_else (match_test "TARGET_SEXT")

                (match_operand 0 "nonimmed_operand")

                (match_operand 0 "mem_operand")))

(define_predicate "sext_fldsz_operand"

  (and (match_code "const_int")

       (match_test "INTVAL (op) >= 8 && INTVAL (op) <= 23")))

(define_predicate "lsbitnum_operand"

  (and (match_code "const_int")

       (match_test "BITS_BIG_ENDIAN

                    ? (INTVAL (op) == BITS_PER_WORD - 1)

                    : (INTVAL (op) == 0)")))

(define_predicate "branch_operand"

  (ior (and (match_code "const_int")

            (match_test "xtensa_b4const_or_zero (INTVAL (op))"))

       (match_operand 0 "register_operand")))

(define_predicate "ubranch_operand"

  (ior (and (match_code "const_int")

            (match_test "xtensa_b4constu (INTVAL (op))"))

       (match_operand 0 "register_operand")))

(define_predicate "call_insn_operand"

  (match_code "const_int,const,symbol_ref,reg")

{

  if ((GET_CODE (op) == REG)

      && (op != arg_pointer_rtx)

      && ((REGNO (op) < FRAME_POINTER_REGNUM)

          || (REGNO (op) > LAST_VIRTUAL_REGISTER)))

    return true;

  if (CONSTANT_ADDRESS_P (op))

    {

      /* Direct calls only allowed to static functions with PIC.  */

      if (flag_pic)

        {

          tree callee, callee_sec, caller_sec;

          if (GET_CODE (op) != SYMBOL_REF

              || !SYMBOL_REF_LOCAL_P (op) || SYMBOL_REF_EXTERNAL_P (op))

            return false;

          /* Don't attempt a direct call if the callee is known to be in

             a different section, since there's a good chance it will be

             out of range.  */

          if (flag_function_sections

              || DECL_ONE_ONLY (current_function_decl))

            return false;

          caller_sec = DECL_SECTION_NAME (current_function_decl);

          callee = SYMBOL_REF_DECL (op);

          if (callee)

            {

              if (DECL_ONE_ONLY (callee))

                return false;

              callee_sec = DECL_SECTION_NAME (callee);

              if (((caller_sec == NULL_TREE) ^ (callee_sec == NULL_TREE))

                  || (caller_sec != NULL_TREE

                      && strcmp (TREE_STRING_POINTER (caller_sec),

                                 TREE_STRING_POINTER (callee_sec)) != 0))

                return false;

            }

          else if (caller_sec != NULL_TREE)

            return false;

        }

      return true;

    }

  return false;

})

(define_predicate "move_operand"

  (ior

     (ior (match_operand 0 "register_operand")

          (match_operand 0 "memory_operand"))

     (ior (and (match_code "const_int")

               (match_test "GET_MODE_CLASS (mode) == MODE_INT

                            && xtensa_simm12b (INTVAL (op))"))

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

               (match_test "TARGET_CONST16 && CONSTANT_P (op)

                            && GET_MODE_SIZE (mode) % UNITS_PER_WORD == 0")))))

;; Accept the floating point constant 1 in the appropriate mode.

(define_predicate "const_float_1_operand"

  (match_code "const_double")

{

  REAL_VALUE_TYPE d;

  REAL_VALUE_FROM_CONST_DOUBLE (d, op);

  return REAL_VALUES_EQUAL (d, dconst1);

})

(define_predicate "fpmem_offset_operand"

  (and (match_code "const_int")

       (match_test "xtensa_mem_offset (INTVAL (op), SFmode)")))

(define_predicate "branch_operator"

  (match_code "eq,ne,lt,ge"))

(define_predicate "ubranch_operator"

  (match_code "ltu,geu"))

(define_predicate "boolean_operator"

  (match_code "eq,ne"))