119 lines
3.5 KiB
Markdown
119 lines
3.5 KiB
Markdown
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;; Constraint definitions for DEC Alpha.
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;; Copyright (C) 2007-2021 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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;;; Unused letters:
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;;; ABCDEF H V YZ
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;;; de ghijkl pq tu wxyz
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;; Integer register constraints.
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(define_register_constraint "a" "R24_REG"
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"General register 24, input to division routine")
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(define_register_constraint "b" "R25_REG"
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"General register 24, input to division routine")
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(define_register_constraint "c" "R27_REG"
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"General register 27, function call address")
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(define_register_constraint "f" "TARGET_FPREGS ? FLOAT_REGS : NO_REGS"
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"Any floating-point register")
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(define_register_constraint "v" "R0_REG"
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"General register 0, function value return address")
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(define_memory_constraint "w"
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"A memory whose address is only a register"
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(match_operand 0 "mem_noofs_operand"))
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;; Integer constant constraints.
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(define_constraint "I"
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"An unsigned 8 bit constant"
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(and (match_code "const_int")
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(match_test "IN_RANGE (ival, 0, 255)")))
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(define_constraint "J"
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"The constant zero"
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(and (match_code "const_int")
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(match_test "ival == 0")))
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(define_constraint "K"
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"Signed 16-bit integer constant"
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(and (match_code "const_int")
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(match_test "IN_RANGE (ival, -32768, 32767)")))
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(define_constraint "L"
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"A shifted signed 16-bit constant appropriate for LDAH"
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(and (match_code "const_int")
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(match_test "(ival & 0xffff) == 0
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&& (ival >> 31 == -1 || ival >> 31 == 0)")))
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(define_constraint "M"
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"A valid operand of a ZAP insn"
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(and (match_code "const_int")
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(match_test "zap_mask (ival) != 0")))
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(define_constraint "N"
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"A complemented unsigned 8-bit constant"
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(and (match_code "const_int")
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(match_test "IN_RANGE (~ival, 0, 255)")))
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(define_constraint "O"
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"A negated unsigned 8-bit constant"
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(and (match_code "const_int")
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(match_test "IN_RANGE (-ival, 0, 255)")))
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(define_constraint "P"
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"The constant 1, 2 or 3"
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(and (match_code "const_int")
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(match_test "IN_RANGE (ival, 1, 3)")))
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;; Floating-point constant constraints.
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(define_constraint "G"
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"The floating point zero constant"
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(and (match_code "const_double")
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(match_test "op == CONST0_RTX (mode)")))
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;; "Extra" constraints.
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;; A memory location that is not a reference
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;; (using an AND) to an unaligned location.
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(define_memory_constraint "Q"
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"@internal A normal_memory_operand"
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(and (match_code "mem")
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(not (match_code "and" "0"))))
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(define_constraint "R"
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"@internal A direct_call_operand"
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(match_operand:DI 0 "direct_call_operand"))
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(define_constraint "S"
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"An unsigned 6-bit constant"
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(and (match_code "const_int")
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(match_test "IN_RANGE (ival, 0, 63)")))
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(define_constraint "T"
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"@internal A high-part symbol"
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(match_code "high"))
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(define_constraint "W"
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"A vector zero constant"
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(and (match_code "const_vector")
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(match_test "op == CONST0_RTX (mode)")))
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