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jeremybenn |
;; Constraint definitions for the Motorola MCore
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;; Copyright (C) 2011
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;; Free Software Foundation, Inc.
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;; This file is part of GCC.
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;; GCC is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 3, or (at your option)
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;; any later version.
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;; GCC is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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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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;; .
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;; Register constraints.
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(define_register_constraint "a" "LRW_REGS"
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"@internal")
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(define_register_constraint "b" "ONLYR1_REGS"
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"@internal")
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(define_register_constraint "c" "C_REGS"
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"@internal")
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(define_register_constraint "x" "ALL_REGS"
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"@internal")
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;; Integer constraints.
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(define_constraint "I"
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"An integer in the range 0 to 127."
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(and (match_code "const_int")
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(match_test "IN_RANGE (ival, 0, 127)")))
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(define_constraint "J"
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"An integer in the range 1 to 32."
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(and (match_code "const_int")
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(match_test "IN_RANGE (ival, 1, 32)")))
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(define_constraint "K"
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"A shift operand, an integer in the range 0 to 31."
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(and (match_code "const_int")
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(match_test "IN_RANGE (ival, 0, 31)")))
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(define_constraint "L"
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"A negative arithmetic operand in the range -32 to -1."
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(and (match_code "const_int")
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(match_test "IN_RANGE (ival, -32, -1)")))
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(define_constraint "M"
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"A constant loadable by bgeni."
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(and (match_code "const_int")
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(match_test "exact_log2 (ival) >= 0 && exact_log2 (ival) <= 30")))
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(define_constraint "N"
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"A constant loadable by bmaskii, including -1."
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(and (match_code "const_int")
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(ior (match_test "ival == -1")
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(and (match_test "exact_log2 (ival + 1) >= 0")
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(match_test "exact_log2 (ival + 1) <= 30")))))
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(define_constraint "O"
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"A constant allowed by cmov with two constants +/- 1 of each other."
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(and (match_code "const_int")
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(ior (match_test "insn_const_int_ok_for_constraint (ival, CONSTRAINT_I)")
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(match_test "insn_const_int_ok_for_constraint (ival, CONSTRAINT_M)")
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(match_test "insn_const_int_ok_for_constraint (ival, CONSTRAINT_N)")
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(match_test "insn_const_int_ok_for_constraint (ival - 1, CONSTRAINT_M)")
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(match_test "insn_const_int_ok_for_constraint (ival + 1, CONSTRAINT_N)"))))
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(define_constraint "P"
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"A value that can be generated without an lrw instruction."
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(and (match_code "const_int")
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(match_test "mcore_const_ok_for_inline (ival)")))
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;; Floating-point constraints.
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(define_constraint "G"
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"@internal"
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(and (match_code "const_double")
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(match_test "insn_const_int_ok_for_constraint (hval, CONSTRAINT_I)")
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(match_test "insn_const_int_ok_for_constraint (ival, CONSTRAINT_I)")))
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;; Other constraints.
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(define_constraint "Q"
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"The integer constant one."
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(and (match_code "const_int")
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(match_test "ival == 1")))
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(define_constraint "R"
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"@internal"
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(and (match_code "mem")
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(match_test "GET_CODE (XEXP (op, 0)) == LABEL_REF")))
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(define_constraint "S"
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"An integer constant with 0, 1, or 2 bits clear."
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(and (match_code "const_int")
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(match_test "mcore_num_zeros (ival) <= 2")))
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(define_constraint "T"
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"An integer constant with 2 set bits."
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(and (match_code "const_int")
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(match_test "mcore_num_ones (ival) == 2")))
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(define_constraint "U"
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"The integer constant zero."
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(and (match_code "const_int")
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(match_test "ival == 0")))
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