aarch64.opt revision 1.1 
1; Machine description for AArch64 architecture.
2; Copyright (C) 2009-2013 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
21HeaderInclude
22config/aarch64/aarch64-opts.h
23
24; The TLS dialect names to use with -mtls-dialect.
25
26Enum
27Name(tls_type) Type(enum aarch64_tls_type)
28The possible TLS dialects:
29
30EnumValue
31Enum(tls_type) String(trad) Value(TLS_TRADITIONAL)
32
33EnumValue
34Enum(tls_type) String(desc) Value(TLS_DESCRIPTORS)
35
36; The code model option names for -mcmodel.
37
38Enum
39Name(cmodel) Type(enum aarch64_code_model)
40The code model option names for -mcmodel:
41
42EnumValue
43Enum(cmodel) String(tiny) Value(AARCH64_CMODEL_TINY)
44
45EnumValue
46Enum(cmodel) String(small) Value(AARCH64_CMODEL_SMALL)
47
48EnumValue
49Enum(cmodel) String(large) Value(AARCH64_CMODEL_LARGE)
50
51; The cpu/arch option names to use in cpu/arch selection.
52
53Variable
54const char *aarch64_arch_string
55
56Variable
57const char *aarch64_cpu_string
58
59Variable
60const char *aarch64_tune_string
61
62mbig-endian
63Target Report RejectNegative Mask(BIG_END)
64Assume target CPU is configured as big endian
65
66mgeneral-regs-only
67Target Report RejectNegative Mask(GENERAL_REGS_ONLY)
68Generate code which uses only the general registers
69
70mfix-cortex-a53-835769
71Target Report Var(aarch64_fix_a53_err835769) Init(2)
72Workaround for ARM Cortex-A53 Erratum number 835769
73
74mlittle-endian
75Target Report RejectNegative InverseMask(BIG_END)
76Assume target CPU is configured as little endian
77
78mcmodel=
79Target RejectNegative Joined Enum(cmodel) Var(aarch64_cmodel_var) Init(AARCH64_CMODEL_SMALL)
80Specify the code model
81
82mstrict-align
83Target Report RejectNegative Mask(STRICT_ALIGN)
84Don't assume that unaligned accesses are handled by the system
85
86momit-leaf-frame-pointer
87Target Report Save Var(flag_omit_leaf_frame_pointer) Init(1)
88Omit the frame pointer in leaf functions
89
90mtls-dialect=
91Target RejectNegative Joined Enum(tls_type) Var(aarch64_tls_dialect) Init(TLS_DESCRIPTORS)
92Specify TLS dialect
93
94march=
95Target RejectNegative Joined Var(aarch64_arch_string)
96-march=ARCH	Use features of architecture ARCH
97
98mcpu=
99Target RejectNegative Joined Var(aarch64_cpu_string)
100-mcpu=CPU	Use features of and optimize for CPU
101
102mtune=
103Target RejectNegative Joined Var(aarch64_tune_string)
104-mtune=CPU	Optimize for CPU
105