110 lines
3.2 KiB
Markdown
110 lines
3.2 KiB
Markdown
;; Constraint definitions for ATMEL AVR micro controllers.
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;; Copyright (C) 2006, 2007 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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;; Register constraints
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(define_register_constraint "t" "R0_REG"
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"Temporary register r0")
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(define_register_constraint "b" "BASE_POINTER_REGS"
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"Base pointer registers (r28--r31)")
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(define_register_constraint "e" "POINTER_REGS"
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"Pointer registers (r26--r31)")
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(define_register_constraint "w" "ADDW_REGS"
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"Registers from r24 to r31. These registers
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can be used in @samp{adiw} command.")
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(define_register_constraint "d" "LD_REGS"
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"Registers from r16 to r31.")
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(define_register_constraint "l" "NO_LD_REGS"
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"Registers from r0 to r15.")
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(define_register_constraint "a" "SIMPLE_LD_REGS"
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"Registers from r16 to r23.")
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(define_register_constraint "x" "POINTER_X_REGS"
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"Register pair X (r27:r26).")
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(define_register_constraint "y" "POINTER_Y_REGS"
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"Register pair Y (r29:r28).")
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(define_register_constraint "z" "POINTER_Z_REGS"
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"Register pair Z (r31:r30).")
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(define_register_constraint "q" "STACK_REG"
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"Stack pointer register (SPH:SPL).")
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(define_constraint "I"
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"Integer constant in the range 0 @dots{} 63."
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(and (match_code "const_int")
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(match_test "ival >= 0 && ival <= 63")))
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(define_constraint "J"
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"Integer constant in the range -63 @dots{} 0."
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(and (match_code "const_int")
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(match_test "ival <= 0 && ival >= -63")))
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(define_constraint "K"
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"Integer constant 2."
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(and (match_code "const_int")
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(match_test "ival == 2")))
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(define_constraint "L"
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"Zero."
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(and (match_code "const_int")
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(match_test "ival == 0")))
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(define_constraint "M"
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"Integer constant in the range 0 @dots{} 0xff."
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(and (match_code "const_int")
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(match_test "ival >= 0 && ival <= 0xff")))
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(define_constraint "N"
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"Constant integer @minus{}1."
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(and (match_code "const_int")
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(match_test "ival == -1")))
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(define_constraint "O"
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"Constant integer 8, 16, or 24."
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(and (match_code "const_int")
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(match_test "ival == 8 || ival == 16 || ival == 24")))
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(define_constraint "P"
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"Constant integer 1."
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(and (match_code "const_int")
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(match_test "ival == 1")))
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(define_constraint "G"
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"Constant float 0."
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(and (match_code "const_double")
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(match_test "op == CONST0_RTX (SFmode)")))
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(define_constraint "R"
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"Integer constant in the range -6 @dots{} 5."
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(and (match_code "const_int")
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(match_test "ival >= -6 && ival <= 5")))
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(define_memory_constraint "Q"
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"A memory address based on Y or Z pointer with displacement."
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(and (match_code "mem")
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(match_test "extra_constraint_Q (op)")))
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