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;; Predicate definitions for HP PA-RISC.

;; Copyright (C) 2005, 2007, 2010, 2011 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

;; .

;; Return truth value of whether OP is an integer which fits the range

;; constraining 5-bit signed immediate operands in three-address insns.

(define_predicate "int5_operand"

  (and (match_code "const_int")

       (match_test "INT_5_BITS (op)")))

;; Return truth value of whether OP is an integer which fits the range

;; constraining 5-bit unsigned immediate operands in three-address insns.

(define_predicate "uint5_operand"

  (and (match_code "const_int")

       (match_test "INT_U5_BITS (op)")))

;; Return truth value of whether OP is an integer which fits the range

;; constraining 11-bit signed immediate operands in three-address insns.

(define_predicate "int11_operand"

  (and (match_code "const_int")

       (match_test "INT_11_BITS (op)")))

;; Return truth value of whether OP is an integer which fits the range

;; constraining 14-bit signed immediate operands in three-address insns.

(define_predicate "int14_operand"

  (and (match_code "const_int")

       (match_test "INT_14_BITS (op)")))

;; True iff OP is a const_int or const_double that will fit in 32 bits.

(define_predicate "uint32_operand"

  (if_then_else (match_test "HOST_BITS_PER_WIDE_INT > 32")

    (and (match_code "const_int")

         (match_test "INTVAL (op) >= 0

                      && INTVAL (op) < (HOST_WIDE_INT) 1 << 32"))

    (and (match_code "const_int,const_double")

         (match_test "CONST_INT_P (op) || CONST_DOUBLE_HIGH (op) == 0"))))

;; True iff depi can be used to compute (reg | OP).

(define_predicate "cint_ior_operand"

  (and (match_code "const_int")

       (match_test "pa_ior_mask_p (INTVAL (op))")))

;; True iff OP is CONST_INT that can be moved in one instruction

;; into a general register.

(define_predicate "cint_move_operand"

  (and (match_code "const_int")

       (match_test "pa_cint_ok_for_move (INTVAL (op))")))

;; True iff OP is a CONST0_RTX for MODE.

(define_predicate "const_0_operand"

  (and (match_code "const_int,const_double")

       (match_test "op == CONST0_RTX (mode)")))

;; A constant integer suitable for use in a PRE_MODIFY memory reference.

(define_predicate "pre_cint_operand"

  (and (match_code "const_int")

       (match_test "INTVAL (op) >= -0x2000 && INTVAL (op) < 0x10")))

;; A constant integer suitable for use in a POST_MODIFY memory reference.

(define_predicate "post_cint_operand"

  (and (match_code "const_int")

       (match_test "INTVAL (op) < 0x2000 && INTVAL (op) >= -0x10")))

;; True iff depi or extru can be used to compute (reg & OP).

(define_predicate "and_operand"

  (ior (match_operand 0 "register_operand")

       (and (match_code "const_int")

            (match_test "pa_and_mask_p (INTVAL (op))"))))

;; Return truth value of whether OP can be used as an operand in a

;; three operand arithmetic insn that accepts registers of mode MODE

;; or 5-bit signed integers.

(define_predicate "arith5_operand"

  (ior (match_operand 0 "register_operand")

       (match_operand 0 "int5_operand")))

;; Return truth value of whether OP can be used as an operand in a

;; three operand arithmetic insn that accepts registers of mode MODE

;; or 11-bit signed integers.

(define_predicate "arith11_operand"

  (ior (match_operand 0 "register_operand")

       (match_operand 0 "int11_operand")))

;; Return truth value of whether OP can be used as an operand in a

;; three operand arithmetic insn that accepts registers of mode MODE

;; or 14-bit signed integers.

(define_predicate "arith14_operand"

  (ior (match_operand 0 "register_operand")

       (match_operand 0 "int14_operand")))

;; Return truth value of whether OP can be used as an operand in a

;; three operand arithmetic insn that accepts registers of mode MODE

;; or 32-bit signed integers.

(define_predicate "arith32_operand"

  (ior (match_operand 0 "register_operand")

       (match_code "const_int")))

;; True iff OP can be used as an operand in an adddi3 insn.

(define_predicate "adddi3_operand"

  (if_then_else (match_test "TARGET_64BIT")

    (match_operand 0 "arith14_operand")

    (match_operand 0 "arith11_operand")))

;; True iff OP is valid as a base or index register in a REG+REG address.

(define_predicate "borx_reg_operand"

  (match_code "reg")

{

  /* We must reject virtual registers as the only expressions that

     can be instantiated are REG and REG+CONST.  */

  if (op == virtual_incoming_args_rtx

      || op == virtual_stack_vars_rtx

      || op == virtual_stack_dynamic_rtx

      || op == virtual_outgoing_args_rtx

      || op == virtual_cfa_rtx)

    return false;

  /* While it's always safe to index off the frame pointer, it's not

     profitable to do so when the frame pointer is being eliminated.  */

  if (!reload_completed

      && flag_omit_frame_pointer

      && !cfun->calls_alloca

      && op == frame_pointer_rtx)

    return false;

  return register_operand (op, mode);

})

;; Return nonzero if OP is suitable for use in a call to a named

;; function.

;;

;; For 2.5 try to eliminate either call_operand_address or

;; function_label_operand, they perform very similar functions.

(define_predicate "call_operand_address"

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

{

  return (GET_MODE (op) == word_mode

          && CONSTANT_P (op) && ! TARGET_PORTABLE_RUNTIME);

})

;; True iff OP can be used as the divisor in a div millicode call.

(define_predicate "div_operand"

  (match_code "reg,const_int")

{

  return (mode == SImode

          && ((REG_P (op) && REGNO (op) == 25)

              || (CONST_INT_P (op)

                  && INTVAL (op) > 0 && INTVAL (op) < 16

                  && pa_magic_milli[INTVAL (op)])));

})

;; True iff OP is a reloading floating point register

(define_predicate "fp_reg_operand"

  (and (match_code "reg")

       (match_test "reg_renumber && FP_REG_P (op)")))

;; True iff OP is a function label operand.

(define_special_predicate "function_label_operand"

  (and (match_code "symbol_ref")

       (match_test "FUNCTION_NAME_P (XSTR (op, 0))")))

;; True iff OP is an indexed memory operand.

(define_predicate "indexed_memory_operand"

  (match_code "subreg,mem")

{

  if (GET_MODE (op) != mode)

    return false;

  /* Before reload, a (SUBREG (MEM...)) forces reloading into a register.  */

  if (reload_completed && GET_CODE (op) == SUBREG)

    op = SUBREG_REG (op);

  if (! MEM_P (op))

    return false;

  op = XEXP (op, 0);

  return IS_INDEX_ADDR_P (op) && memory_address_p (mode, op);

})

;; True iff the operand OP can be used as the destination operand of

;; an integer store.  This also implies the operand could be used as

;; the source operand of an integer load.  Symbolic, lo_sum and indexed

;; memory operands are not allowed.  We accept reloading pseudos and

;; other memory operands.

(define_predicate "integer_store_memory_operand"

  (match_code "reg,mem")

{

  return ((reload_in_progress

           && REG_P (op)

           && REGNO (op) >= FIRST_PSEUDO_REGISTER

           && reg_renumber [REGNO (op)] < 0)

          || (MEM_P (op)

              && (reload_in_progress || memory_address_p (mode, XEXP (op, 0)))

              && !symbolic_memory_operand (op, VOIDmode)

              && !IS_LO_SUM_DLT_ADDR_P (XEXP (op, 0))

              && !IS_INDEX_ADDR_P (XEXP (op, 0))));

})

;; Return true iff OP is an integer register.

(define_predicate "ireg_operand"

  (and (match_code "reg")

       (match_test "REGNO (op) > 0 && REGNO (op) < 32")))

;; Return truth value of whether OP is an integer which fits the range

;; constraining immediate operands in three-address insns, or is an

;; integer register.

(define_predicate "ireg_or_int5_operand"

  (ior (match_operand 0 "ireg_operand")

       (match_operand 0 "int5_operand")))

;; True iff OP is a CONST_INT of the forms 0...0xxxx or

;; 0...01...1xxxx. Such values can be the left hand side x in (x <<

;; r), using the zvdepi instruction.

(define_predicate "lhs_lshift_cint_operand"

  (match_code "const_int")

{

  unsigned HOST_WIDE_INT x;

  x = INTVAL (op) >> 4;

  return (x & (x + 1)) == 0;

})

;; True iff OP can be used in a zvdep instruction.

(define_predicate "lhs_lshift_operand"

  (ior (match_operand 0 "register_operand")

       (match_operand 0 "lhs_lshift_cint_operand")))

;; Accept anything that can be used as a destination operand for a

;; move instruction.  We don't accept indexed memory operands since

;; they are supported only for floating point stores.

(define_predicate "move_dest_operand"

  (match_code "subreg,reg,mem")

{

  if (register_operand (op, mode))

    return true;

  if (GET_MODE (op) != mode)

    return false;

  if (GET_CODE (op) == SUBREG)

    op = SUBREG_REG (op);

  if (GET_CODE (op) != MEM || symbolic_memory_operand (op, mode))

    return false;

  op = XEXP (op, 0);

  return (memory_address_p (mode, op)

          && !IS_INDEX_ADDR_P (op)

          && !IS_LO_SUM_DLT_ADDR_P (op));

})

;; Accept anything that can be used as a source operand for a move

;; instruction.

(define_predicate "move_src_operand"

  (match_code "subreg,reg,const_int,const_double,mem")

{

  if (register_operand (op, mode))

    return true;

  if (op == CONST0_RTX (mode))

    return true;

  if (CONST_INT_P (op))

    return pa_cint_ok_for_move (INTVAL (op));

  if (GET_MODE (op) != mode)

    return false;

  if (GET_CODE (op) == SUBREG)

    op = SUBREG_REG (op);

  if (! MEM_P (op))

    return false;

  /* Until problems with management of the REG_POINTER flag are resolved,

     we need to delay creating move insns with unscaled indexed addresses

     until CSE is not expected.  */

  if (!TARGET_NO_SPACE_REGS

      && !cse_not_expected

      && GET_CODE (XEXP (op, 0)) == PLUS

      && REG_P (XEXP (XEXP (op, 0), 0))

      && REG_P (XEXP (XEXP (op, 0), 1)))

    return false;

  return memory_address_p (mode, XEXP (op, 0));

})

;; True iff OP is not a symbolic memory operand.

(define_predicate "nonsymb_mem_operand"

  (match_code "subreg,mem")

{

  if (GET_CODE (op) == SUBREG)

    op = SUBREG_REG (op);

  if (! MEM_P (op))

    return false;

  /* Until problems with management of the REG_POINTER flag are resolved,

     we need to delay creating move insns with unscaled indexed addresses

     until CSE is not expected.  */

  if (!TARGET_NO_SPACE_REGS

      && !cse_not_expected

      && GET_CODE (XEXP (op, 0)) == PLUS

      && REG_P (XEXP (XEXP (op, 0), 0))

      && REG_P (XEXP (XEXP (op, 0), 1)))

    return false;

  return (!symbolic_memory_operand (op, mode)

          && memory_address_p (mode, XEXP (op, 0)));

})

;; True iff OP is anything other than a hard register.

(define_predicate "non_hard_reg_operand"

  (match_test "! (REG_P (op) && REGNO (op) < FIRST_PSEUDO_REGISTER)"))

;; True iff OP is a reference to a label whose address can be loaded

;; while generating PIC code.

(define_predicate "pic_label_operand"

  (match_code "label_ref,const")

{

  if (!flag_pic)

    return false;

  switch (GET_CODE (op))

    {

    case LABEL_REF:

      return true;

    case CONST:

      op = XEXP (op, 0);

      return (GET_CODE (XEXP (op, 0)) == LABEL_REF

              && CONST_INT_P (XEXP (op, 1)));

    default:

      gcc_unreachable ();

    }

  return false;

})

;; True iff the operand OP lives in text space.  OP is a symbolic operand.

;; If so, SYMBOL_REF_FLAG, which is set by pa_encode_section_info, is true.

(define_special_predicate "read_only_operand"

  (match_test "true")

{

  if (GET_CODE (op) == CONST)

    op = XEXP (XEXP (op, 0), 0);

  if (GET_CODE (op) == SYMBOL_REF)

    {

      if (flag_pic)

        return SYMBOL_REF_FLAG (op) && !CONSTANT_POOL_ADDRESS_P (op);

      else

        return SYMBOL_REF_FLAG (op) || CONSTANT_POOL_ADDRESS_P (op);

    }

  return true;

})

;; True iff the operand is a register operand, or a non-symbolic

;; memory operand after reload.  A SUBREG is not accepted since it

;; will need a reload.

;;

;; This predicate is used for branch patterns that internally handle

;; register reloading.  We need to accept non-symbolic memory operands

;; after reload to ensure that the pattern is still valid if reload

;; didn't find a hard register for the operand.

(define_predicate "reg_before_reload_operand"

  (match_code "reg,mem")

{

  if (register_operand (op, mode))

    return true;

  if (reload_completed

      && memory_operand (op, mode)

      && !symbolic_memory_operand (op, mode))

    return true;

  return false;

})

;; True iff OP is a register or const_0 operand for MODE.

(define_predicate "reg_or_0_operand"

  (ior (match_operand 0 "register_operand")

       (match_operand 0 "const_0_operand")))

;; True iff OP is either a register, zero, or a non-symbolic memory operand.

(define_predicate "reg_or_0_or_nonsymb_mem_operand"

  (ior (match_operand 0 "reg_or_0_operand")

       (match_operand 0 "nonsymb_mem_operand")))

;; Accept REG and any CONST_INT that can be moved in one instruction

;; into a general register.

(define_predicate "reg_or_cint_move_operand"

  (ior (match_operand 0 "register_operand")

       (match_operand 0 "cint_move_operand")))

;; True iff OP can be used to compute (reg | OP).

(define_predicate "reg_or_cint_ior_operand"

  (ior (match_operand 0 "register_operand")

       (match_operand 0 "cint_ior_operand")))

;; Return 1 if OP is a CONST_INT with the value 2, 4, or 8.  These are

;; the valid constants for shadd instructions.

(define_predicate "shadd_operand"

  (and (match_code "const_int")

       (match_test "pa_shadd_constant_p (INTVAL (op))")))

;; Return truth value of statement that OP is a symbolic memory operand.

(define_predicate "symbolic_memory_operand"

  (match_code "subreg,mem")

{

  if (GET_CODE (op) == SUBREG)

    op = SUBREG_REG (op);

  if (!MEM_P (op))

    return false;

  return pa_symbolic_expression_p (XEXP (op, 0));

})

;; True iff OP is a symbolic operand.

;; Note: an inline copy of this code is present in pa_secondary_reload.

(define_predicate "symbolic_operand"

  (match_code "symbol_ref,label_ref,const")

{

  switch (GET_CODE (op))

    {

    case SYMBOL_REF:

      return !SYMBOL_REF_TLS_MODEL (op);

    case LABEL_REF:

      return true;

    case CONST:

      op = XEXP (op, 0);

      return (GET_CODE (op) == PLUS

              && ((GET_CODE (XEXP (op, 0)) == SYMBOL_REF

                   && !SYMBOL_REF_TLS_MODEL (XEXP (op, 0)))

                  || GET_CODE (XEXP (op, 0)) == LABEL_REF)

              && GET_CODE (XEXP (op, 1)) == CONST_INT);

    default:

      gcc_unreachable ();

    }

  return true;

})

;; Return true if OP is a symbolic operand for the TLS Global Dynamic model.

(define_predicate "tgd_symbolic_operand"

  (and (match_code "symbol_ref")

       (match_test "SYMBOL_REF_TLS_MODEL (op) == TLS_MODEL_GLOBAL_DYNAMIC")))

;; Return true if OP is a symbolic operand for the TLS Local Dynamic model.

(define_predicate "tld_symbolic_operand"

  (and (match_code "symbol_ref")

       (match_test "SYMBOL_REF_TLS_MODEL (op) == TLS_MODEL_LOCAL_DYNAMIC")))

;; Return true if OP is a symbolic operand for the TLS Initial Exec model.

(define_predicate "tie_symbolic_operand"

  (and (match_code "symbol_ref")

       (match_test "SYMBOL_REF_TLS_MODEL (op) == TLS_MODEL_INITIAL_EXEC")))

;; Return true if OP is a symbolic operand for the TLS Local Exec model.

(define_predicate "tle_symbolic_operand"

  (and (match_code "symbol_ref")

       (match_test "SYMBOL_REF_TLS_MODEL (op) == TLS_MODEL_LOCAL_EXEC")))

;; True iff this is a comparison operator.  This allows the use of

;; MATCH_OPERATOR to recognize all the branch insns.

(define_predicate "cmpib_comparison_operator"

  (match_code "eq,ne,lt,le,leu,gt,gtu,ge"))

;; True iff OP is an operator suitable for use in a movb instruction.

(define_predicate "movb_comparison_operator"

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

;; True iff OP is a PLUS, XOR or IOR operator.

(define_predicate "plus_xor_ior_operator"

  (match_code "plus,xor,ior"))