96 lines
3.5 KiB
Markdown
96 lines
3.5 KiB
Markdown
;; Common GCC machine description file, shared by all targets.
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;; Copyright (C) 2014-2017 Free Software Foundation, Inc.
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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
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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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;;
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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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;;
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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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(define_register_constraint "r" "GENERAL_REGS"
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"Matches any general register.")
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(define_memory_constraint "TARGET_MEM_CONSTRAINT"
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"Matches any valid memory."
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(and (match_code "mem")
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(match_test "memory_address_addr_space_p (GET_MODE (op), XEXP (op, 0),
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MEM_ADDR_SPACE (op))")))
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(define_memory_constraint "o"
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"Matches an offsettable memory reference."
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(and (match_code "mem")
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(match_test "offsettable_nonstrict_memref_p (op)")))
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;; "V" matches TARGET_MEM_CONSTRAINTs that are rejected by "o".
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;; This means that it is not a memory constraint in the usual sense,
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;; since reloading the address into a base register would make the
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;; address offsettable.
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(define_constraint "V"
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"Matches a non-offsettable memory reference."
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(and (match_code "mem")
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(match_test "memory_address_addr_space_p (GET_MODE (op), XEXP (op, 0),
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MEM_ADDR_SPACE (op))")
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(not (match_test "offsettable_nonstrict_memref_p (op)"))))
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;; Like "V", this is not a memory constraint, since reloading the address
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;; into a base register would cause it not to match.
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(define_constraint "<"
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"Matches a pre-dec or post-dec operand."
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(and (match_code "mem")
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(ior (match_test "GET_CODE (XEXP (op, 0)) == PRE_DEC")
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(match_test "GET_CODE (XEXP (op, 0)) == POST_DEC"))))
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;; See the comment for "<".
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(define_constraint ">"
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"Matches a pre-inc or post-inc operand."
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(and (match_code "mem")
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(ior (match_test "GET_CODE (XEXP (op, 0)) == PRE_INC")
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(match_test "GET_CODE (XEXP (op, 0)) == POST_INC"))))
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(define_address_constraint "p"
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"Matches a general address."
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(match_test "address_operand (op, VOIDmode)"))
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(define_constraint "i"
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"Matches a general integer constant."
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(and (match_test "CONSTANT_P (op)")
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(match_test "!flag_pic || LEGITIMATE_PIC_OPERAND_P (op)")))
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(define_constraint "s"
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"Matches a symbolic integer constant."
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(and (match_test "CONSTANT_P (op)")
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(match_test "!CONST_SCALAR_INT_P (op)")
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(match_test "!flag_pic || LEGITIMATE_PIC_OPERAND_P (op)")))
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(define_constraint "n"
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"Matches a non-symbolic integer constant."
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(and (match_test "CONST_SCALAR_INT_P (op)")
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(match_test "!flag_pic || LEGITIMATE_PIC_OPERAND_P (op)")))
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(define_constraint "E"
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"Matches a floating-point constant."
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(ior (match_test "CONST_DOUBLE_AS_FLOAT_P (op)")
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(match_test "GET_CODE (op) == CONST_VECTOR
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&& GET_MODE_CLASS (GET_MODE (op)) == MODE_VECTOR_FLOAT")))
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;; There is no longer a distinction between "E" and "F".
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(define_constraint "F"
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"Matches a floating-point constant."
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(ior (match_test "CONST_DOUBLE_AS_FLOAT_P (op)")
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(match_test "GET_CODE (op) == CONST_VECTOR
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&& GET_MODE_CLASS (GET_MODE (op)) == MODE_VECTOR_FLOAT")))
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(define_constraint "X"
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"Matches anything."
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(match_test "true"))
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