gcc/config/aarch64/aarch64-tuning-flags.def

   1 /* Copyright (C) 2015-2019 Free Software Foundation, Inc.
   2    Contributed by ARM Ltd.
   3
   4    This file is part of GCC.
   5
   6    GCC is free software; you can redistribute it and/or modify it
   7    under the terms of the GNU General Public License as published
   8    by the Free Software Foundation; either version 3, or (at your
   9    option) any later version.
  10
  11    GCC is distributed in the hope that it will be useful, but WITHOUT
  12    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  14    License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with GCC; see the file COPYING3.  If not see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 /* Additional control over certain tuning parameters.  Before including
  21    this file, define a macro:
  22
  23      AARCH64_EXTRA_TUNING_OPTION (name, internal_name)
  24
  25    Where:
  26
  27      NAME is a string giving a friendly name for the tuning flag.
  28      INTERNAL_NAME gives the internal name suitable for appending to
  29      AARCH64_TUNE_ to give an enum name. */
  30
  31 AARCH64_EXTRA_TUNING_OPTION ("rename_fma_regs", RENAME_FMA_REGS)
  32
  33 /* Don't create non-8 byte aligned load/store pair.  That is if the
  34 two load/stores are not at least 8 byte aligned don't create load/store
  35 pairs.   */
  36 AARCH64_EXTRA_TUNING_OPTION ("slow_unaligned_ldpw", SLOW_UNALIGNED_LDPW)
  37
  38 /* Some of the optional shift to some arthematic instructions are
  39    considered cheap.  Logical shift left <=4 with or without a
  40    zero extend are considered cheap.  Sign extend; non logical shift left
  41    are not considered cheap.  */
  42 AARCH64_EXTRA_TUNING_OPTION ("cheap_shift_extend", CHEAP_SHIFT_EXTEND)
  43
  44 /* Disallow load/store pair instructions on Q-registers.  */
  45 AARCH64_EXTRA_TUNING_OPTION ("no_ldp_stp_qregs", NO_LDP_STP_QREGS)
  46
  47 AARCH64_EXTRA_TUNING_OPTION ("rename_load_regs", RENAME_LOAD_REGS)
  48
  49 #undef AARCH64_EXTRA_TUNING_OPTION