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      1 ;;  Machine Description for TI MSP43* processors
      2 ;;  Copyright (C) 2013-2022 Free Software Foundation, Inc.
      3 ;;  Contributed by Red Hat.
      4 
      5 ;; This file is part of GCC.
      6 
      7 ;; GCC is free software; you can redistribute it and/or modify
      8 ;; it under the terms of the GNU General Public License as published by
      9 ;; the Free Software Foundation; either version 3, or (at your option)
     10 ;; any later version.
     11 
     12 ;; GCC is distributed in the hope that it will be useful,
     13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
     14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     15 ;; GNU General Public License for more details.
     16 
     17 ;; You should have received a copy of the GNU General Public License
     18 ;; along with GCC; see the file COPYING3.  If not see
     19 ;; <http://www.gnu.org/licenses/>.
     20 
     21 (define_register_constraint "R12" "R12_REGS"
     22   "Register R12.")
     23 
     24 (define_register_constraint "R13" "R13_REGS"
     25   "Register R13.")
     26 
     27 (define_constraint "K"
     28   "Integer constant 1-19."
     29   (and (match_code "const_int")
     30        (match_test "IN_RANGE (ival, 1, 19)")))
     31 
     32 (define_constraint "L"
     33   "Integer constant -1^20..1^19."
     34   (and (match_code "const_int")
     35        (match_test "IN_RANGE (ival, HOST_WIDE_INT_M1U << 20, 1 << 19)")))
     36 
     37 ;; Valid shift amount for RRUM, RRAM, RLAM, RRCM.
     38 (define_constraint "M"
     39   "Integer constant 1-4."
     40   (and (match_code "const_int")
     41        (match_test "IN_RANGE (ival, 1, 4)")))
     42 
     43 (define_constraint "N"
     44   "Integer constant 0-255."
     45   (and (match_code "const_int")
     46        (match_test "IN_RANGE (ival, 0, 255)")))
     47 
     48 (define_constraint "O"
     49   "Integer constant 256-65535."
     50   (and (match_code "const_int")
     51        (match_test "IN_RANGE (ival, 256, 65535)")))
     52 
     53 (define_constraint "P"
     54   "Integer constant 1-16."
     55   (and (match_code "const_int")
     56        (match_test "IN_RANGE (ival, 1, 16)")))
     57 
     58 ;; We do not allow arbitrary constants, eg symbols or labels,
     59 ;; because their address may be above the 16-bit address limit
     60 ;; supported by the offset used in the MOVA instruction.
     61 (define_constraint "Ya"
     62   "Memory reference, any type, but restricted range of constants"
     63   (and (match_code "mem")
     64        (ior (match_code "reg" "0")
     65 	    (and (match_code "plus" "0")
     66 		 (match_code "reg" "00")
     67 		 (match_test ("CONST_INT_P (XEXP (XEXP (op, 0), 1))")))
     68 	    (match_test "CONSTANT_P (XEXP (op, 0))")
     69 	    (match_code "post_inc" "0")
     70 	    )))
     71 
     72 (define_constraint "Yl"
     73   "Memory reference, labels only."
     74   (and (match_code "mem")
     75        (match_code "label_ref" "0")))
     76 
     77 
     78 ;; These are memory references that are safe to use without the X suffix,
     79 ;; because we know/assume they need not index across the 64K boundary.
     80 ;; Note that for a PSImode memory operand, we always need to use the X suffix,
     81 ;; regardless of what this constraint decides.
     82 (define_constraint "Ys"
     83   "Memory reference, indexed or indirect register addressing modes."
     84   (and (match_code "mem")
     85        (ior
     86 	(and (match_code "plus" "0")
     87 	     (and (match_code "reg" "00")
     88 		  (match_test ("CONST_INT_P (XEXP (XEXP (op, 0), 1))"))
     89 		  (match_test ("IN_RANGE (INTVAL (XEXP (XEXP (op, 0), 1)), HOST_WIDE_INT_M1U << 15, (1 << 15)-1)"))))
     90 	(match_code "reg" "0")
     91 	(match_code "post_inc" "0")
     92 	)))
     93 
     94 (define_constraint "Yc"
     95   "Memory reference, for CALL - we can't use SP."
     96   (and (match_code "mem")
     97        (match_code "mem" "0")
     98        (not (ior
     99 	     (and (match_code "plus" "00")
    100 		  (and (match_code "reg" "000")
    101 		       (match_test ("REGNO (XEXP (XEXP (op, 0), 0)) != SP_REGNO"))))
    102 	     (and (match_code "reg" "0")
    103 		  (match_test ("REGNO (XEXP (XEXP (op, 0), 0)) != SP_REGNO")))
    104 	     ))))
    105 
    106 (define_constraint "Yx"
    107   "Memory reference, in lower memory below address 0x10000."
    108   (and (match_code "mem")
    109        (match_test "msp430_op_not_in_high_mem (op)")))
    110