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;; Constraint definitions for the Motorola MCore
;; Copyright (C) 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
;; <http://www.gnu.org/licenses/>.
;; Register constraints.
(define_register_constraint "a" "LRW_REGS"
"@internal")
(define_register_constraint "b" "ONLYR1_REGS"
"@internal")
(define_register_constraint "c" "C_REGS"
"@internal")
(define_register_constraint "x" "ALL_REGS"
"@internal")
;; Integer constraints.
(define_constraint "I"
"An integer in the range 0 to 127."
(and (match_code "const_int")
(match_test "IN_RANGE (ival, 0, 127)")))
(define_constraint "J"
"An integer in the range 1 to 32."
(and (match_code "const_int")
(match_test "IN_RANGE (ival, 1, 32)")))
(define_constraint "K"
"A shift operand, an integer in the range 0 to 31."
(and (match_code "const_int")
(match_test "IN_RANGE (ival, 0, 31)")))
(define_constraint "L"
"A negative arithmetic operand in the range -32 to -1."
(and (match_code "const_int")
(match_test "IN_RANGE (ival, -32, -1)")))
(define_constraint "M"
"A constant loadable by bgeni."
(and (match_code "const_int")
(match_test "exact_log2 (ival) >= 0 && exact_log2 (ival) <= 30")))
(define_constraint "N"
"A constant loadable by bmaskii, including -1."
(and (match_code "const_int")
(ior (match_test "ival == -1")
(and (match_test "exact_log2 (ival + 1) >= 0")
(match_test "exact_log2 (ival + 1) <= 30")))))
(define_constraint "O"
"A constant allowed by cmov with two constants +/- 1 of each other."
(and (match_code "const_int")
(ior (match_test "insn_const_int_ok_for_constraint (ival, CONSTRAINT_I)")
(match_test "insn_const_int_ok_for_constraint (ival, CONSTRAINT_M)")
(match_test "insn_const_int_ok_for_constraint (ival, CONSTRAINT_N)")
(match_test "insn_const_int_ok_for_constraint (ival - 1, CONSTRAINT_M)")
(match_test "insn_const_int_ok_for_constraint (ival + 1, CONSTRAINT_N)"))))
(define_constraint "P"
"A value that can be generated without an lrw instruction."
(and (match_code "const_int")
(match_test "mcore_const_ok_for_inline (ival)")))
;; Floating-point constraints.
(define_constraint "G"
"@internal"
(and (match_code "const_double")
(match_test "insn_const_int_ok_for_constraint (hval, CONSTRAINT_I)")
(match_test "insn_const_int_ok_for_constraint (ival, CONSTRAINT_I)")))
;; Other constraints.
(define_constraint "Q"
"The integer constant one."
(and (match_code "const_int")
(match_test "ival == 1")))
(define_constraint "R"
"@internal"
(and (match_code "mem")
(match_test "GET_CODE (XEXP (op, 0)) == LABEL_REF")))
(define_constraint "S"
"An integer constant with 0, 1, or 2 bits clear."
(and (match_code "const_int")
(match_test "mcore_num_zeros (ival) <= 2")))
(define_constraint "T"
"An integer constant with 2 set bits."
(and (match_code "const_int")
(match_test "mcore_num_ones (ival) == 2")))
(define_constraint "U"
"The integer constant zero."
(and (match_code "const_int")
(match_test "ival == 0")))
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