82 lines
2.5 KiB
Markdown
82 lines
2.5 KiB
Markdown
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;; Predicates of machine description for CR16.
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;; Copyright (C) 2012-2021 Free Software Foundation, Inc.
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;; Contributed by KPIT Cummins Infosystems Limited.
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;;
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;; This file is part of GCC.
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;;
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;; GCC is free software; you can redistribute it and/or modify it
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;; under the terms of the GNU General Public License as published
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;; by the Free Software Foundation; either version 3, or (at your
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;; option) any later version.
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;;
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;; GCC is distributed in the hope that it will be useful, but WITHOUT
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;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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;; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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;; License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with GCC; see the file COPYING3. If not see
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;; <http://www.gnu.org/licenses/>.
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;; Constraints
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;; Register constraints
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(define_register_constraint "b" "NOSP_REGS"
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"@no sp registers")
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(define_register_constraint "c" "SHORT_REGS"
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"@short registers")
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(define_register_constraint "d" "LONG_REGS"
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"@long registers")
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;; Integer constraints.
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(define_constraint "I"
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"A signed 4-bit immediate."
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(and (match_code "const_int")
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(match_test "SIGNED_INT_FITS_N_BITS (ival, 4)")))
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(define_constraint "J"
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"A signed 5-bit immediate."
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(and (match_code "const_int")
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(match_test "SIGNED_INT_FITS_N_BITS (ival, 5)")))
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(define_constraint "K"
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"A signed 6-bit immediate."
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(and (match_code "const_int")
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(match_test "SIGNED_INT_FITS_N_BITS (ival, 6)")))
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(define_constraint "L"
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"A unsigned 4-bit immediate."
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(and (match_code "const_int")
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(match_test "UNSIGNED_INT_FITS_N_BITS (ival, 4)")))
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(define_constraint "M"
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"A unsigned and customized 4-bit immediate."
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(and (match_code "const_int")
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(match_test "(IN_RANGE_P (ival, 0, 15) && ((ival != 9) && (ival != 11)))")))
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(define_constraint "N"
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"A signed 16-bit immediate."
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(and (match_code "const_int")
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(match_test "IN_RANGE_P (ival, -32768, 32767)")))
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(define_constraint "O"
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"A unsigned 20-bit immediate."
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(and (match_code "const_int")
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(match_test "IN_RANGE_P (ival, 0, 1048575)")))
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(define_constraint "Q"
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"A shift QI immediate."
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(and (match_code "const_int")
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(match_test "IN_RANGE_P (ival, 0, 7)")))
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(define_constraint "R"
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"A shift HI immediate."
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(and (match_code "const_int")
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(match_test "IN_RANGE_P (ival, 0, 15)")))
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(define_constraint "S"
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"A shift SI immediate."
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(and (match_code "const_int")
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(match_test "IN_RANGE_P (ival, 0, 31)")))
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