arm.opt revision 1.1.1.2 
1; Options for the ARM port of the compiler.
2
3; Copyright (C) 2005-2013 Free Software Foundation, Inc.
4;
5; This file is part of GCC.
6;
7; GCC is free software; you can redistribute it and/or modify it under
8; the terms of the GNU General Public License as published by the Free
9; Software Foundation; either version 3, or (at your option) any later
10; version.
11;
12; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13; WARRANTY; without even the implied warranty of MERCHANTABILITY or
14; FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15; 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/arm/arm-opts.h
23
24Enum
25Name(tls_type) Type(enum arm_tls_type)
26TLS dialect to use:
27
28EnumValue
29Enum(tls_type) String(gnu) Value(TLS_GNU)
30
31EnumValue
32Enum(tls_type) String(gnu2) Value(TLS_GNU2)
33
34mabi=
35Target RejectNegative Joined Enum(arm_abi_type) Var(arm_abi) Init(ARM_DEFAULT_ABI)
36Specify an ABI
37
38Enum
39Name(arm_abi_type) Type(enum arm_abi_type)
40Known ARM ABIs (for use with the -mabi= option):
41
42EnumValue
43Enum(arm_abi_type) String(apcs-gnu) Value(ARM_ABI_APCS)
44
45EnumValue
46Enum(arm_abi_type) String(atpcs) Value(ARM_ABI_ATPCS)
47
48EnumValue
49Enum(arm_abi_type) String(aapcs) Value(ARM_ABI_AAPCS)
50
51EnumValue
52Enum(arm_abi_type) String(iwmmxt) Value(ARM_ABI_IWMMXT)
53
54EnumValue
55Enum(arm_abi_type) String(aapcs-linux) Value(ARM_ABI_AAPCS_LINUX)
56
57mabort-on-noreturn
58Target Report Mask(ABORT_NORETURN)
59Generate a call to abort if a noreturn function returns
60
61mapcs
62Target RejectNegative Mask(APCS_FRAME) Undocumented
63
64mapcs-float
65Target Report Mask(APCS_FLOAT)
66Pass FP arguments in FP registers
67
68mapcs-frame
69Target Report Mask(APCS_FRAME)
70Generate APCS conformant stack frames
71
72mapcs-reentrant
73Target Report Mask(APCS_REENT)
74Generate re-entrant, PIC code
75
76mapcs-stack-check
77Target Report Mask(APCS_STACK) Undocumented
78
79march=
80Target RejectNegative Joined Enum(arm_arch) Var(arm_arch_option)
81Specify the name of the target architecture
82
83; Other arm_arch values are loaded from arm-tables.opt
84; but that is a generated file and this is an odd-one-out.
85EnumValue
86Enum(arm_arch) String(native) Value(-1) DriverOnly
87
88marm
89Target Report RejectNegative InverseMask(THUMB)
90Generate code in 32 bit ARM state.
91
92mbig-endian
93Target Report RejectNegative Mask(BIG_END)
94Assume target CPU is configured as big endian
95
96mcallee-super-interworking
97Target Report Mask(CALLEE_INTERWORKING)
98Thumb: Assume non-static functions may be called from ARM code
99
100mcaller-super-interworking
101Target Report Mask(CALLER_INTERWORKING)
102Thumb: Assume function pointers may go to non-Thumb aware code
103
104mcpu=
105Target RejectNegative Joined Enum(processor_type) Var(arm_cpu_option) Init(arm_none)
106Specify the name of the target CPU
107
108mfloat-abi=
109Target RejectNegative Joined Enum(float_abi_type) Var(arm_float_abi) Init(TARGET_DEFAULT_FLOAT_ABI)
110Specify if floating point hardware should be used
111
112Enum
113Name(float_abi_type) Type(enum float_abi_type)
114Known floating-point ABIs (for use with the -mfloat-abi= option):
115
116EnumValue
117Enum(float_abi_type) String(soft) Value(ARM_FLOAT_ABI_SOFT)
118
119EnumValue
120Enum(float_abi_type) String(softfp) Value(ARM_FLOAT_ABI_SOFTFP)
121
122EnumValue
123Enum(float_abi_type) String(hard) Value(ARM_FLOAT_ABI_HARD)
124
125mfp16-format=
126Target RejectNegative Joined Enum(arm_fp16_format_type) Var(arm_fp16_format) Init(ARM_FP16_FORMAT_NONE)
127Specify the __fp16 floating-point format
128
129Enum
130Name(arm_fp16_format_type) Type(enum arm_fp16_format_type)
131Known __fp16 formats (for use with the -mfp16-format= option):
132
133EnumValue
134Enum(arm_fp16_format_type) String(none) Value(ARM_FP16_FORMAT_NONE)
135
136EnumValue
137Enum(arm_fp16_format_type) String(ieee) Value(ARM_FP16_FORMAT_IEEE)
138
139EnumValue
140Enum(arm_fp16_format_type) String(alternative) Value(ARM_FP16_FORMAT_ALTERNATIVE)
141
142mfpu=
143Target RejectNegative Joined Enum(arm_fpu) Var(arm_fpu_index)
144Specify the name of the target floating point hardware/format
145
146mhard-float
147Target RejectNegative Alias(mfloat-abi=, hard) Undocumented
148
149mlittle-endian
150Target Report RejectNegative InverseMask(BIG_END)
151Assume target CPU is configured as little endian
152
153mlong-calls
154Target Report Mask(LONG_CALLS)
155Generate call insns as indirect calls, if necessary
156
157mpic-register=
158Target RejectNegative Joined Var(arm_pic_register_string)
159Specify the register to be used for PIC addressing
160
161mpoke-function-name
162Target Report Mask(POKE_FUNCTION_NAME)
163Store function names in object code
164
165msched-prolog
166Target Report Mask(SCHED_PROLOG)
167Permit scheduling of a function's prologue sequence
168
169msingle-pic-base
170Target Report Mask(SINGLE_PIC_BASE)
171Do not load the PIC register in function prologues
172
173msoft-float
174Target RejectNegative Alias(mfloat-abi=, soft) Undocumented
175
176mstructure-size-boundary=
177Target RejectNegative Joined UInteger Var(arm_structure_size_boundary) Init(DEFAULT_STRUCTURE_SIZE_BOUNDARY)
178Specify the minimum bit alignment of structures
179
180mthumb
181Target Report RejectNegative Mask(THUMB)
182Generate code for Thumb state
183
184mthumb-interwork
185Target Report Mask(INTERWORK)
186Support calls between Thumb and ARM instruction sets
187
188mtls-dialect=
189Target RejectNegative Joined Enum(tls_type) Var(target_tls_dialect) Init(TLS_GNU)
190Specify thread local storage scheme
191
192mtp=
193Target RejectNegative Joined Enum(arm_tp_type) Var(target_thread_pointer) Init(TP_AUTO)
194Specify how to access the thread pointer
195
196Enum
197Name(arm_tp_type) Type(enum arm_tp_type)
198Valid arguments to -mtp=:
199
200EnumValue
201Enum(arm_tp_type) String(soft) Value(TP_SOFT)
202
203EnumValue
204Enum(arm_tp_type) String(auto) Value(TP_AUTO)
205
206EnumValue
207Enum(arm_tp_type) String(cp15) Value(TP_CP15)
208
209mtpcs-frame
210Target Report Mask(TPCS_FRAME)
211Thumb: Generate (non-leaf) stack frames even if not needed
212
213mtpcs-leaf-frame
214Target Report Mask(TPCS_LEAF_FRAME)
215Thumb: Generate (leaf) stack frames even if not needed
216
217mtune=
218Target RejectNegative Joined Enum(processor_type) Var(arm_tune_option) Init(arm_none)
219Tune code for the given processor
220
221; Other processor_type values are loaded from arm-tables.opt
222; but that is a generated file and this is an odd-one-out.
223EnumValue
224Enum(processor_type) String(native) Value(-1) DriverOnly
225
226mwords-little-endian
227Target Report RejectNegative Mask(LITTLE_WORDS)
228Assume big endian bytes, little endian words.  This option is deprecated.
229
230mvectorize-with-neon-quad
231Target Report RejectNegative InverseMask(NEON_VECTORIZE_DOUBLE)
232Use Neon quad-word (rather than double-word) registers for vectorization
233
234mvectorize-with-neon-double
235Target Report RejectNegative Mask(NEON_VECTORIZE_DOUBLE)
236Use Neon double-word (rather than quad-word) registers for vectorization
237
238mword-relocations
239Target Report Var(target_word_relocations) Init(TARGET_DEFAULT_WORD_RELOCATIONS)
240Only generate absolute relocations on word sized values.
241
242mfix-cortex-m3-ldrd
243Target Report Var(fix_cm3_ldrd) Init(2)
244Avoid overlapping destination and address registers on LDRD instructions
245that may trigger Cortex-M3 errata.
246
247munaligned-access
248Target Report Var(unaligned_access) Init(2)
249Enable unaligned word and halfword accesses to packed data.
250