gcc/config/aarch64/aarch64.opt

   1 ; Machine description for AArch64 architecture.
   2 ; Copyright (C) 2009-2015 Free Software Foundation, Inc.
   3 ; Contributed by ARM Ltd.
   4 ;
   5 ; This file is part of GCC.
   6 ;
   7 ; GCC is free software; you can redistribute it and/or modify it
   8 ; under the terms of the GNU General Public License as published by
   9 ; the Free Software Foundation; either version 3, or (at your option)
  10 ; any later version.
  11 ;
  12 ; GCC is distributed in the hope that it will be useful, but
  13 ; WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 ; General Public License for more details.
  16 ;
  17 ; You should have received a copy of the GNU General Public License
  18 ; along with GCC; see the file COPYING3.  If not see
  19 ; <http://www.gnu.org/licenses/>.
  20
  21 HeaderInclude
  22 config/aarch64/aarch64-opts.h
  23
  24 ; The TLS dialect names to use with -mtls-dialect.
  25
  26 Enum
  27 Name(tls_type) Type(enum aarch64_tls_type)
  28 The possible TLS dialects:
  29
  30 EnumValue
  31 Enum(tls_type) String(trad) Value(TLS_TRADITIONAL)
  32
  33 EnumValue
  34 Enum(tls_type) String(desc) Value(TLS_DESCRIPTORS)
  35
  36 ; The code model option names for -mcmodel.
  37
  38 Enum
  39 Name(cmodel) Type(enum aarch64_code_model)
  40 The code model option names for -mcmodel:
  41
  42 EnumValue
  43 Enum(cmodel) String(tiny) Value(AARCH64_CMODEL_TINY)
  44
  45 EnumValue
  46 Enum(cmodel) String(small) Value(AARCH64_CMODEL_SMALL)
  47
  48 EnumValue
  49 Enum(cmodel) String(large) Value(AARCH64_CMODEL_LARGE)
  50
  51 ; The cpu/arch option names to use in cpu/arch selection.
  52
  53 Variable
  54 const char *aarch64_arch_string
  55
  56 Variable
  57 const char *aarch64_cpu_string
  58
  59 Variable
  60 const char *aarch64_tune_string
  61
  62 mbig-endian
  63 Target Report RejectNegative Mask(BIG_END)
  64 Assume target CPU is configured as big endian
  65
  66 mgeneral-regs-only
  67 Target Report RejectNegative Mask(GENERAL_REGS_ONLY)
  68 Generate code which uses only the general registers
  69
  70 mfix-cortex-a53-835769
  71 Target Report Var(aarch64_fix_a53_err835769) Init(2)
  72 Workaround for ARM Cortex-A53 Erratum number 835769
  73
  74 mfix-cortex-a53-843419
  75 Target Report
  76 Workaround for ARM Cortex-A53 Erratum number 843419
  77
  78 mlittle-endian
  79 Target Report RejectNegative InverseMask(BIG_END)
  80 Assume target CPU is configured as little endian
  81
  82 mcmodel=
  83 Target RejectNegative Joined Enum(cmodel) Var(aarch64_cmodel_var) Init(AARCH64_CMODEL_SMALL)
  84 Specify the code model
  85
  86 mstrict-align
  87 Target Report RejectNegative Mask(STRICT_ALIGN)
  88 Don't assume that unaligned accesses are handled by the system
  89
  90 momit-leaf-frame-pointer
  91 Target Report Save Var(flag_omit_leaf_frame_pointer) Init(1)
  92 Omit the frame pointer in leaf functions
  93
  94 mtls-dialect=
  95 Target RejectNegative Joined Enum(tls_type) Var(aarch64_tls_dialect) Init(TLS_DESCRIPTORS)
  96 Specify TLS dialect
  97
  98 march=
  99 Target RejectNegative ToLower Joined Var(aarch64_arch_string)
 100 -march=ARCH     Use features of architecture ARCH
 101
 102 mcpu=
 103 Target RejectNegative ToLower Joined Var(aarch64_cpu_string)
 104 -mcpu=CPU       Use features of and optimize for CPU
 105
 106 mtune=
 107 Target RejectNegative ToLower Joined Var(aarch64_tune_string)
 108 -mtune=CPU      Optimize for CPU
 109
 110 mabi=
 111 Target RejectNegative Joined Enum(aarch64_abi) Var(aarch64_abi) Init(AARCH64_ABI_DEFAULT)
 112 -mabi=ABI       Generate code that conforms to the specified ABI
 113
 114 Enum
 115 Name(aarch64_abi) Type(int)
 116 Known AArch64 ABIs (for use with the -mabi= option):
 117
 118 EnumValue
 119 Enum(aarch64_abi) String(ilp32) Value(AARCH64_ABI_ILP32)
 120
 121 EnumValue
 122 Enum(aarch64_abi) String(lp64) Value(AARCH64_ABI_LP64)