1 ; Machine description for AArch64 architecture.
2 ; Copyright (C) 2009-2015 Free Software Foundation, Inc.
3 ; Contributed by ARM Ltd.
5 ; This file is part of GCC.
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)
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.
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/>.
22 config/aarch64/aarch64-opts.h
24 ; The TLS dialect names to use with -mtls-dialect.
27 Name(tls_type) Type(enum aarch64_tls_type)
28 The possible TLS dialects:
31 Enum(tls_type) String(trad) Value(TLS_TRADITIONAL)
34 Enum(tls_type) String(desc) Value(TLS_DESCRIPTORS)
36 ; The code model option names for -mcmodel.
39 Name(cmodel) Type(enum aarch64_code_model)
40 The code model option names for -mcmodel:
43 Enum(cmodel) String(tiny) Value(AARCH64_CMODEL_TINY)
46 Enum(cmodel) String(small) Value(AARCH64_CMODEL_SMALL)
49 Enum(cmodel) String(large) Value(AARCH64_CMODEL_LARGE)
52 Target Report RejectNegative Mask(BIG_END)
53 Assume target CPU is configured as big endian
56 Target Report RejectNegative Mask(GENERAL_REGS_ONLY)
57 Generate code which uses only the general registers
59 mfix-cortex-a53-835769
60 Target Report Var(aarch64_fix_a53_err835769) Init(2)
61 Workaround for ARM Cortex-A53 Erratum number 835769
63 mfix-cortex-a53-843419
65 Workaround for ARM Cortex-A53 Erratum number 843419
68 Target Report RejectNegative InverseMask(BIG_END)
69 Assume target CPU is configured as little endian
72 Target RejectNegative Joined Enum(cmodel) Var(aarch64_cmodel_var) Init(AARCH64_CMODEL_SMALL)
73 Specify the code model
76 Target Report RejectNegative Mask(STRICT_ALIGN)
77 Don't assume that unaligned accesses are handled by the system
79 momit-leaf-frame-pointer
80 Target Report Save Var(flag_omit_leaf_frame_pointer) Init(2)
81 Omit the frame pointer in leaf functions
84 Target RejectNegative Joined Enum(tls_type) Var(aarch64_tls_dialect) Init(TLS_DESCRIPTORS)
88 Target RejectNegative ToLower Joined Var(aarch64_arch_string)
89 -march=ARCH Use features of architecture ARCH
92 Target RejectNegative ToLower Joined Var(aarch64_cpu_string)
93 -mcpu=CPU Use features of and optimize for CPU
96 Target RejectNegative ToLower Joined Var(aarch64_tune_string)
97 -mtune=CPU Optimize for CPU
100 Target RejectNegative Joined Enum(aarch64_abi) Var(aarch64_abi) Init(AARCH64_ABI_DEFAULT)
101 -mabi=ABI Generate code that conforms to the specified ABI
104 Target RejectNegative ToLower Joined Var(aarch64_override_tune_string)
105 -moverride=STRING Power users only! Override CPU optimization parameters
108 Name(aarch64_abi) Type(int)
109 Known AArch64 ABIs (for use with the -mabi= option):
112 Enum(aarch64_abi) String(ilp32) Value(AARCH64_ABI_ILP32)
115 Enum(aarch64_abi) String(lp64) Value(AARCH64_ABI_LP64)