;; Predicate definitions for ARM and Thumb ;; Copyright (C) 2004 Free Software Foundation, Inc. ;; Contributed by ARM Ltd.

;; 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 “s_register_operand” (match_code “reg,subreg”) { if (GET_CODE (op) == SUBREG) op = SUBREG_REG (op); /* We don't consider registers whose class is NO_REGS to be a register operand. / / XXX might have to check for lo regs only for thumb ??? */ return (GET_CODE (op) == REG && (REGNO (op) >= FIRST_PSEUDO_REGISTER || REGNO_REG_CLASS (REGNO (op)) != NO_REGS)); })

;; Any hard register. (define_predicate “arm_hard_register_operand” (match_code “reg”) { return REGNO (op) < FIRST_PSEUDO_REGISTER; })

;; Any core register, or any pseudo. */ (define_predicate “arm_general_register_operand” (match_code “reg,subreg”) { if (GET_CODE (op) == SUBREG) op = SUBREG_REG (op);

return (GET_CODE (op) == REG && (REGNO (op) <= LAST_ARM_REGNUM || REGNO (op) >= FIRST_PSEUDO_REGISTER)); })

(define_predicate “f_register_operand” (match_code “reg,subreg”) { if (GET_CODE (op) == SUBREG) op = SUBREG_REG (op);

/* We don't consider registers whose class is NO_REGS to be a register operand. */ return (GET_CODE (op) == REG && (REGNO (op) >= FIRST_PSEUDO_REGISTER || REGNO_REG_CLASS (REGNO (op)) == FPA_REGS)); })

;; Reg, subreg(reg) or const_int. (define_predicate “reg_or_int_operand” (ior (match_code “const_int”) (match_operand 0 “s_register_operand”)))

(define_predicate “arm_immediate_operand” (and (match_code “const_int”) (match_test “const_ok_for_arm (INTVAL (op))”)))

(define_predicate “arm_neg_immediate_operand” (and (match_code “const_int”) (match_test “const_ok_for_arm (-INTVAL (op))”)))

(define_predicate “arm_not_immediate_operand” (and (match_code “const_int”) (match_test “const_ok_for_arm (~INTVAL (op))”)))

;; Something valid on the RHS of an ARM data-processing instruction (define_predicate “arm_rhs_operand” (ior (match_operand 0 “s_register_operand”) (match_operand 0 “arm_immediate_operand”)))

(define_predicate “arm_rhsm_operand” (ior (match_operand 0 “arm_rhs_operand”) (match_operand 0 “memory_operand”)))

(define_predicate “arm_add_operand” (ior (match_operand 0 “arm_rhs_operand”) (match_operand 0 “arm_neg_immediate_operand”)))

(define_predicate “arm_addimm_operand” (ior (match_operand 0 “arm_immediate_operand”) (match_operand 0 “arm_neg_immediate_operand”)))

(define_predicate “arm_not_operand” (ior (match_operand 0 “arm_rhs_operand”) (match_operand 0 “arm_not_immediate_operand”)))

;; True if the operand is a memory reference which contains an ;; offsettable address. (define_predicate “offsettable_memory_operand” (and (match_code “mem”) (match_test “offsettable_address_p (reload_completed | reload_in_progress, mode, XEXP (op, 0))”)))

;; True if the operand is a memory operand that does not have an ;; automodified base register (and thus will not generate output reloads). (define_predicate “call_memory_operand” (and (match_code “mem”) (and (match_test “GET_RTX_CLASS (GET_CODE (XEXP (op, 0))) != RTX_AUTOINC”) (match_operand 0 “memory_operand”))))

(define_predicate “arm_reload_memory_operand” (and (match_code “mem,reg,subreg”) (match_test “(!CONSTANT_P (op) && (true_regnum(op) == -1 || (GET_CODE (op) == REG && REGNO (op) >= FIRST_PSEUDO_REGISTER)))”)))

;; True for valid operands for the rhs of an floating point insns. ;; Allows regs or certain consts on FPA, just regs for everything else. (define_predicate “arm_float_rhs_operand” (ior (match_operand 0 “s_register_operand”) (and (match_code “const_double”) (match_test “TARGET_FPA && arm_const_double_rtx (op)”))))

(define_predicate “arm_float_add_operand” (ior (match_operand 0 “arm_float_rhs_operand”) (and (match_code “const_double”) (match_test “TARGET_FPA && neg_const_double_rtx_ok_for_fpa (op)”))))

(define_predicate “vfp_compare_operand” (ior (match_operand 0 “s_register_operand”) (and (match_code “const_double”) (match_test “arm_const_double_rtx (op)”))))

(define_predicate “arm_float_compare_operand” (if_then_else (match_test “TARGET_VFP”) (match_operand 0 “vfp_compare_operand”) (match_operand 0 “arm_float_rhs_operand”)))

;; True for valid index operands. (define_predicate “index_operand” (ior (match_operand 0 “s_register_operand”) (and (match_operand 0 “immediate_operand”) (match_test “(GET_CODE (op) != CONST_INT || (INTVAL (op) < 4096 && INTVAL (op) > -4096))”))))

;; True for operators that can be combined with a shift in ARM state. (define_special_predicate “shiftable_operator” (and (match_code “plus,minus,ior,xor,and”) (match_test “mode == GET_MODE (op)”)))

;; True for logical binary operators. (define_special_predicate “logical_binary_operator” (and (match_code “ior,xor,and”) (match_test “mode == GET_MODE (op)”)))

;; True for shift operators. (define_special_predicate “shift_operator” (and (ior (ior (and (match_code “mult”) (match_test “power_of_two_operand (XEXP (op, 1), mode)”)) (and (match_code “rotate”) (match_test “GET_CODE (XEXP (op, 1)) == CONST_INT && ((unsigned HOST_WIDE_INT) INTVAL (XEXP (op, 1))) < 32”))) (match_code “ashift,ashiftrt,lshiftrt,rotatert”)) (match_test “mode == GET_MODE (op)”)))

;; True for EQ & NE (define_special_predicate “equality_operator” (match_code “eq,ne”))

;; True for comparisons other than LTGT or UNEQ. (define_special_predicate “arm_comparison_operator” (match_code “eq,ne,le,lt,ge,gt,geu,gtu,leu,ltu,unordered,ordered,unlt,unle,unge,ungt”))

(define_special_predicate “minmax_operator” (and (match_code “smin,smax,umin,umax”) (match_test “mode == GET_MODE (op)”)))

(define_special_predicate “cc_register” (and (match_code “reg”) (and (match_test “REGNO (op) == CC_REGNUM”) (ior (match_test “mode == GET_MODE (op)”) (match_test “mode == VOIDmode && GET_MODE_CLASS (GET_MODE (op)) == MODE_CC”)))))

(define_special_predicate “dominant_cc_register” (match_code “reg”) { if (mode == VOIDmode) { mode = GET_MODE (op);

  if (GET_MODE_CLASS (mode) != MODE_CC)
return false;
}

return (cc_register (op, mode) && (mode == CC_DNEmode || mode == CC_DEQmode || mode == CC_DLEmode || mode == CC_DLTmode || mode == CC_DGEmode || mode == CC_DGTmode || mode == CC_DLEUmode || mode == CC_DLTUmode || mode == CC_DGEUmode || mode == CC_DGTUmode)); })

(define_special_predicate “arm_extendqisi_mem_op” (and (match_operand 0 “memory_operand”) (match_test “arm_legitimate_address_p (mode, XEXP (op, 0), SIGN_EXTEND, 0)”)))

(define_predicate “power_of_two_operand” (match_code “const_int”) { HOST_WIDE_INT value = INTVAL (op);

return value != 0 && (value & (value - 1)) == 0; })

(define_predicate “nonimmediate_di_operand” (match_code “reg,subreg,mem”) { if (s_register_operand (op, mode)) return true;

if (GET_CODE (op) == SUBREG) op = SUBREG_REG (op);

return GET_CODE (op) == MEM && memory_address_p (DImode, XEXP (op, 0)); })

(define_predicate “di_operand” (ior (match_code “const_int,const_double”) (and (match_code “reg,subreg,mem”) (match_operand 0 “nonimmediate_di_operand”))))

(define_predicate “nonimmediate_soft_df_operand” (match_code “reg,subreg,mem”) { if (s_register_operand (op, mode)) return true;

if (GET_CODE (op) == SUBREG) op = SUBREG_REG (op);

return GET_CODE (op) == MEM && memory_address_p (DFmode, XEXP (op, 0)); })

(define_predicate “soft_df_operand” (ior (match_code “const_double”) (and (match_code “reg,subreg,mem”) (match_operand 0 “nonimmediate_soft_df_operand”))))

(define_predicate “const_shift_operand” (and (match_code “const_int”) (ior (match_operand 0 “power_of_two_operand”) (match_test “((unsigned HOST_WIDE_INT) INTVAL (op)) < 32”))))

(define_special_predicate “load_multiple_operation” (match_code “parallel”) { HOST_WIDE_INT count = XVECLEN (op, 0); int dest_regno; rtx src_addr; HOST_WIDE_INT i = 1, base = 0; rtx elt;

if (count <= 1 || GET_CODE (XVECEXP (op, 0, 0)) != SET) return false;

/* Check to see if this might be a write-back. */ if (GET_CODE (SET_SRC (elt = XVECEXP (op, 0, 0))) == PLUS) { i++; base = 1;

  /* Now check it more carefully.  */
  if (GET_CODE (SET_DEST (elt)) != REG
      || GET_CODE (XEXP (SET_SRC (elt), 0)) != REG
      || GET_CODE (XEXP (SET_SRC (elt), 1)) != CONST_INT
      || INTVAL (XEXP (SET_SRC (elt), 1)) != (count - 1) * 4)
    return false;
}

/* Perform a quick check so we don't blow up below. */ if (count <= i || GET_CODE (XVECEXP (op, 0, i - 1)) != SET || GET_CODE (SET_DEST (XVECEXP (op, 0, i - 1))) != REG || GET_CODE (SET_SRC (XVECEXP (op, 0, i - 1))) != MEM) return false;

dest_regno = REGNO (SET_DEST (XVECEXP (op, 0, i - 1))); src_addr = XEXP (SET_SRC (XVECEXP (op, 0, i - 1)), 0);

for (; i < count; i++) { elt = XVECEXP (op, 0, i);

  if (GET_CODE (elt) != SET
      || GET_CODE (SET_DEST (elt)) != REG
      || GET_MODE (SET_DEST (elt)) != SImode
      || REGNO (SET_DEST (elt)) != (unsigned int)(dest_regno + i - base)
      || GET_CODE (SET_SRC (elt)) != MEM
      || GET_MODE (SET_SRC (elt)) != SImode
      || GET_CODE (XEXP (SET_SRC (elt), 0)) != PLUS
      || !rtx_equal_p (XEXP (XEXP (SET_SRC (elt), 0), 0), src_addr)
      || GET_CODE (XEXP (XEXP (SET_SRC (elt), 0), 1)) != CONST_INT
      || INTVAL (XEXP (XEXP (SET_SRC (elt), 0), 1)) != (i - base) * 4)
    return false;
}

return true; })

(define_special_predicate “store_multiple_operation” (match_code “parallel”) { HOST_WIDE_INT count = XVECLEN (op, 0); int src_regno; rtx dest_addr; HOST_WIDE_INT i = 1, base = 0; rtx elt;

if (count <= 1 || GET_CODE (XVECEXP (op, 0, 0)) != SET) return false;

/* Check to see if this might be a write-back. */ if (GET_CODE (SET_SRC (elt = XVECEXP (op, 0, 0))) == PLUS) { i++; base = 1;

  /* Now check it more carefully.  */
  if (GET_CODE (SET_DEST (elt)) != REG
      || GET_CODE (XEXP (SET_SRC (elt), 0)) != REG
      || GET_CODE (XEXP (SET_SRC (elt), 1)) != CONST_INT
      || INTVAL (XEXP (SET_SRC (elt), 1)) != (count - 1) * 4)
    return false;
}

/* Perform a quick check so we don't blow up below. */ if (count <= i || GET_CODE (XVECEXP (op, 0, i - 1)) != SET || GET_CODE (SET_DEST (XVECEXP (op, 0, i - 1))) != MEM || GET_CODE (SET_SRC (XVECEXP (op, 0, i - 1))) != REG) return false;

src_regno = REGNO (SET_SRC (XVECEXP (op, 0, i - 1))); dest_addr = XEXP (SET_DEST (XVECEXP (op, 0, i - 1)), 0);

for (; i < count; i++) { elt = XVECEXP (op, 0, i);

  if (GET_CODE (elt) != SET
      || GET_CODE (SET_SRC (elt)) != REG
      || GET_MODE (SET_SRC (elt)) != SImode
      || REGNO (SET_SRC (elt)) != (unsigned int)(src_regno + i - base)
      || GET_CODE (SET_DEST (elt)) != MEM
      || GET_MODE (SET_DEST (elt)) != SImode
      || GET_CODE (XEXP (SET_DEST (elt), 0)) != PLUS
      || !rtx_equal_p (XEXP (XEXP (SET_DEST (elt), 0), 0), dest_addr)
      || GET_CODE (XEXP (XEXP (SET_DEST (elt), 0), 1)) != CONST_INT
      || INTVAL (XEXP (XEXP (SET_DEST (elt), 0), 1)) != (i - base) * 4)
    return false;
}

return true; })

(define_special_predicate “multi_register_push” (match_code “parallel”) { if ((GET_CODE (XVECEXP (op, 0, 0)) != SET) || (GET_CODE (SET_SRC (XVECEXP (op, 0, 0))) != UNSPEC) || (XINT (SET_SRC (XVECEXP (op, 0, 0)), 1) != UNSPEC_PUSH_MULT)) return false;

return true; })

;;------------------------------------------------------------------------- ;; ;; Thumb predicates ;;

(define_predicate “thumb_cmp_operand” (ior (and (match_code “reg,subreg”) (match_operand 0 “s_register_operand”)) (and (match_code “const_int”) (match_test “((unsigned HOST_WIDE_INT) INTVAL (op)) < 256”))))

(define_predicate “thumb_cmpneg_operand” (and (match_code “const_int”) (match_test “INTVAL (op) < 0 && INTVAL (op) > -256”)))

;; Return TRUE if a result can be stored in OP without clobbering the ;; condition code register. Prior to reload we only accept a ;; register. After reload we have to be able to handle memory as ;; well, since a pseudo may not get a hard reg and reload cannot ;; handle output-reloads on jump insns.

;; We could possibly handle mem before reload as well, but that might ;; complicate things with the need to handle increment ;; side-effects. (define_predicate “thumb_cbrch_target_operand” (and (match_code “reg,subreg,mem”) (ior (match_operand 0 “s_register_operand”) (and (match_test “reload_in_progress || reload_completed”) (match_operand 0 “memory_operand”)))))

;;------------------------------------------------------------------------- ;; ;; MAVERICK predicates ;;

(define_predicate “cirrus_register_operand” (match_code “reg,subreg”) { if (GET_CODE (op) == SUBREG) op = SUBREG_REG (op);

return (GET_CODE (op) == REG && (REGNO_REG_CLASS (REGNO (op)) == CIRRUS_REGS || REGNO_REG_CLASS (REGNO (op)) == GENERAL_REGS)); })

(define_predicate “cirrus_fp_register” (match_code “reg,subreg”) { if (GET_CODE (op) == SUBREG) op = SUBREG_REG (op);

return (GET_CODE (op) == REG && (REGNO (op) >= FIRST_PSEUDO_REGISTER || REGNO_REG_CLASS (REGNO (op)) == CIRRUS_REGS)); })

(define_predicate “cirrus_shift_const” (and (match_code “const_int”) (match_test “((unsigned HOST_WIDE_INT) INTVAL (op)) < 64”)))

;; APPLE LOCAL begin ARM pic support ;; Allow local symbols and stub references (define_predicate “arm_branch_target” (match_code “reg,symbol_ref”) { #if TARGET_MACHO return GET_CODE (op) == REG || ! (flag_pic || MACHO_DYNAMIC_NO_PIC_P) || machopic_data_defined_p (op) || machopic_lookup_stub_or_non_lazy_ptr (XSTR (op, 0)); #else return 1; #endif }) ;; APPLE LOCAL end ARM pic support