gcc/config/msp430/constraints.md

;; 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 ;; http://www.gnu.org/licenses/.

(define_register_constraint “R12” “R12_REGS” “Register R12.”)

(define_register_constraint “R13” “R13_REGS” “Register R13.”)

(define_constraint “K” “Integer constant 1-19.” (and (match_code “const_int”) (match_test “IN_RANGE (ival, 1, 19)”)))

(define_constraint “L” “Integer constant -1^20..1^19.” (and (match_code “const_int”) (match_test “IN_RANGE (ival, HOST_WIDE_INT_M1U << 20, 1 << 19)”)))

;; Valid shift amount for RRUM, RRAM, RLAM, RRCM. (define_constraint “M” “Integer constant 1-4.” (and (match_code “const_int”) (match_test “IN_RANGE (ival, 1, 4)”)))

(define_constraint “N” “Integer constant 0-255.” (and (match_code “const_int”) (match_test “IN_RANGE (ival, 0, 255)”)))

(define_constraint “O” “Integer constant 256-65535.” (and (match_code “const_int”) (match_test “IN_RANGE (ival, 256, 65535)”)))

(define_constraint “P” “Integer constant 1-16.” (and (match_code “const_int”) (match_test “IN_RANGE (ival, 1, 16)”)))

;; We do not allow arbitrary constants, eg symbols or labels, ;; because their address may be above the 16-bit address limit ;; supported by the offset used in the MOVA instruction. (define_constraint “Ya” “Memory reference, any type, but restricted range of constants” (and (match_code “mem”) (ior (match_code “reg” “0”) (and (match_code “plus” “0”) (match_code “reg” “00”) (match_test (“CONST_INT_P (XEXP (XEXP (op, 0), 1))”))) (match_test “CONSTANT_P (XEXP (op, 0))”) (match_code “post_inc” “0”) )))

(define_constraint “Yl” “Memory reference, labels only.” (and (match_code “mem”) (match_code “label_ref” “0”)))

;; These are memory references that are safe to use without the X suffix, ;; because we know/assume they need not index across the 64K boundary. ;; Note that for a PSImode memory operand, we always need to use the X suffix, ;; regardless of what this constraint decides. (define_constraint “Ys” “Memory reference, indexed or indirect register addressing modes.” (and (match_code “mem”) (ior (and (match_code “plus” “0”) (and (match_code “reg” “00”) (match_test (“CONST_INT_P (XEXP (XEXP (op, 0), 1))”)) (match_test (“IN_RANGE (INTVAL (XEXP (XEXP (op, 0), 1)), HOST_WIDE_INT_M1U << 15, (1 << 15)-1)”)))) (match_code “reg” “0”) (match_code “post_inc” “0”) )))

(define_constraint “Yc” “Memory reference, for CALL - we can't use SP.” (and (match_code “mem”) (match_code “mem” “0”) (not (ior (and (match_code “plus” “00”) (and (match_code “reg” “000”) (match_test (“REGNO (XEXP (XEXP (op, 0), 0)) != SP_REGNO”)))) (and (match_code “reg” “0”) (match_test (“REGNO (XEXP (XEXP (op, 0), 0)) != SP_REGNO”))) ))))

(define_constraint “Yx” “Memory reference, in lower memory below address 0x10000.” (and (match_code “mem”) (match_test “msp430_op_not_in_high_mem (op)”)))