mips.opt revision 1.1.1.2 
1; Options for the MIPS 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
13; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14; or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
15; 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/mips/mips-opts.h
23
24EB
25Driver
26
27EL
28Driver
29
30mabi=
31Target RejectNegative Joined Enum(mips_abi) Var(mips_abi) Init(MIPS_ABI_DEFAULT)
32-mabi=ABI	Generate code that conforms to the given ABI
33
34Enum
35Name(mips_abi) Type(int)
36Known MIPS ABIs (for use with the -mabi= option):
37
38EnumValue
39Enum(mips_abi) String(32) Value(ABI_32)
40
41EnumValue
42Enum(mips_abi) String(o64) Value(ABI_O64)
43
44EnumValue
45Enum(mips_abi) String(n32) Value(ABI_N32)
46
47EnumValue
48Enum(mips_abi) String(64) Value(ABI_64)
49
50EnumValue
51Enum(mips_abi) String(eabi) Value(ABI_EABI)
52
53mabicalls
54Target Report Mask(ABICALLS)
55Generate code that can be used in SVR4-style dynamic objects
56
57mmad
58Target Report Var(TARGET_MAD)
59Use PMC-style 'mad' instructions
60
61march=
62Target RejectNegative Joined Var(mips_arch_option) ToLower Enum(mips_arch_opt_value)
63-march=ISA	Generate code for the given ISA
64
65mbranch-cost=
66Target RejectNegative Joined UInteger Var(mips_branch_cost)
67-mbranch-cost=COST	Set the cost of branches to roughly COST instructions
68
69mbranch-likely
70Target Report Mask(BRANCHLIKELY)
71Use Branch Likely instructions, overriding the architecture default
72
73mflip-mips16
74Target Report Var(TARGET_FLIP_MIPS16)
75Switch on/off MIPS16 ASE on alternating functions for compiler testing
76
77mcheck-zero-division
78Target Report Mask(CHECK_ZERO_DIV)
79Trap on integer divide by zero
80
81mcode-readable=
82Target RejectNegative Joined Enum(mips_code_readable_setting) Var(mips_code_readable) Init(CODE_READABLE_YES)
83-mcode-readable=SETTING	Specify when instructions are allowed to access code
84
85Enum
86Name(mips_code_readable_setting) Type(enum mips_code_readable_setting)
87Valid arguments to -mcode-readable=:
88
89EnumValue
90Enum(mips_code_readable_setting) String(yes) Value(CODE_READABLE_YES)
91
92EnumValue
93Enum(mips_code_readable_setting) String(pcrel) Value(CODE_READABLE_PCREL)
94
95EnumValue
96Enum(mips_code_readable_setting) String(no) Value(CODE_READABLE_NO)
97
98mdivide-breaks
99Target Report RejectNegative Mask(DIVIDE_BREAKS)
100Use branch-and-break sequences to check for integer divide by zero
101
102mdivide-traps
103Target Report RejectNegative InverseMask(DIVIDE_BREAKS, DIVIDE_TRAPS)
104Use trap instructions to check for integer divide by zero
105
106mdmx
107Target Report RejectNegative Var(TARGET_MDMX)
108Allow the use of MDMX instructions
109
110mdouble-float
111Target Report RejectNegative InverseMask(SINGLE_FLOAT, DOUBLE_FLOAT)
112Allow hardware floating-point instructions to cover both 32-bit and 64-bit operations
113
114mdsp
115Target Report Mask(DSP)
116Use MIPS-DSP instructions
117
118mdspr2
119Target Report Mask(DSPR2)
120Use MIPS-DSP REV 2 instructions
121
122mdebug
123Target Var(TARGET_DEBUG_MODE) Undocumented
124
125mdebugd
126Target Var(TARGET_DEBUG_D_MODE) Undocumented
127
128meb
129Target Report RejectNegative Mask(BIG_ENDIAN)
130Use big-endian byte order
131
132mel
133Target Report RejectNegative InverseMask(BIG_ENDIAN, LITTLE_ENDIAN)
134Use little-endian byte order
135
136membedded-data
137Target Report Var(TARGET_EMBEDDED_DATA)
138Use ROM instead of RAM
139
140mexplicit-relocs
141Target Report Mask(EXPLICIT_RELOCS)
142Use NewABI-style %reloc() assembly operators
143
144mextern-sdata
145Target Report Var(TARGET_EXTERN_SDATA) Init(1)
146Use -G for data that is not defined by the current object
147
148mfix-24k
149Target Report Var(TARGET_FIX_24K)
150Work around certain 24K errata
151
152mfix-r4000
153Target Report Mask(FIX_R4000)
154Work around certain R4000 errata
155
156mfix-r4400
157Target Report Mask(FIX_R4400)
158Work around certain R4400 errata
159
160mfix-r10000
161Target Report Mask(FIX_R10000)
162Work around certain R10000 errata
163
164mfix-sb1
165Target Report Var(TARGET_FIX_SB1)
166Work around errata for early SB-1 revision 2 cores
167
168mfix-vr4120
169Target Report Var(TARGET_FIX_VR4120)
170Work around certain VR4120 errata
171
172mfix-vr4130
173Target Report Var(TARGET_FIX_VR4130)
174Work around VR4130 mflo/mfhi errata
175
176mfix4300
177Target Report Var(TARGET_4300_MUL_FIX)
178Work around an early 4300 hardware bug
179
180mfp-exceptions
181Target Report Mask(FP_EXCEPTIONS)
182FP exceptions are enabled
183
184mfp32
185Target Report RejectNegative InverseMask(FLOAT64)
186Use 32-bit floating-point registers
187
188mfp64
189Target Report RejectNegative Mask(FLOAT64)
190Use 64-bit floating-point registers
191
192mflush-func=
193Target RejectNegative Joined Var(mips_cache_flush_func) Init(CACHE_FLUSH_FUNC)
194-mflush-func=FUNC	Use FUNC to flush the cache before calling stack trampolines
195
196mfused-madd
197Target Report Mask(FUSED_MADD)
198Generate floating-point multiply-add instructions
199
200mgp32
201Target Report RejectNegative InverseMask(64BIT)
202Use 32-bit general registers
203
204mgp64
205Target Report RejectNegative Mask(64BIT)
206Use 64-bit general registers
207
208mgpopt
209Target Report Var(TARGET_GPOPT) Init(1)
210Use GP-relative addressing to access small data
211
212mplt
213Target Report Var(TARGET_PLT)
214When generating -mabicalls code, allow executables to use PLTs and copy relocations
215
216mhard-float
217Target Report RejectNegative InverseMask(SOFT_FLOAT_ABI, HARD_FLOAT_ABI)
218Allow the use of hardware floating-point ABI and instructions
219
220minterlink-mips16
221Target Report Var(TARGET_INTERLINK_MIPS16) Init(0)
222Generate code that can be safely linked with MIPS16 code.
223
224mips
225Target RejectNegative Joined ToLower Enum(mips_mips_opt_value) Var(mips_isa_option)
226-mipsN	Generate code for ISA level N
227
228mips16
229Target Report RejectNegative Mask(MIPS16)
230Generate MIPS16 code
231
232mips3d
233Target Report RejectNegative Mask(MIPS3D)
234Use MIPS-3D instructions
235
236mllsc
237Target Report Mask(LLSC)
238Use ll, sc and sync instructions
239
240mlocal-sdata
241Target Report Var(TARGET_LOCAL_SDATA) Init(1)
242Use -G for object-local data
243
244mlong-calls
245Target Report Var(TARGET_LONG_CALLS)
246Use indirect calls
247
248mlong32
249Target Report RejectNegative InverseMask(LONG64, LONG32)
250Use a 32-bit long type
251
252mlong64
253Target Report RejectNegative Mask(LONG64)
254Use a 64-bit long type
255
256mmcount-ra-address
257Target Report Var(TARGET_MCOUNT_RA_ADDRESS)
258Pass the address of the ra save location to _mcount in $12
259
260mmemcpy
261Target Report Mask(MEMCPY)
262Don't optimize block moves
263
264mmt
265Target Report Var(TARGET_MT)
266Allow the use of MT instructions
267
268mno-float
269Target Report RejectNegative Var(TARGET_NO_FLOAT) Condition(TARGET_SUPPORTS_NO_FLOAT)
270Prevent the use of all floating-point operations
271
272mmcu
273Target Report Var(TARGET_MCU)
274Use MCU instructions
275
276mno-flush-func
277Target RejectNegative
278Do not use a cache-flushing function before calling stack trampolines
279
280mno-mdmx
281Target Report RejectNegative Var(TARGET_MDMX, 0)
282Do not use MDMX instructions
283
284mno-mips16
285Target Report RejectNegative InverseMask(MIPS16)
286Generate normal-mode code
287
288mno-mips3d
289Target Report RejectNegative InverseMask(MIPS3D)
290Do not use MIPS-3D instructions
291
292mpaired-single
293Target Report Mask(PAIRED_SINGLE_FLOAT)
294Use paired-single floating-point instructions
295
296mr10k-cache-barrier=
297Target Joined RejectNegative Enum(mips_r10k_cache_barrier_setting) Var(mips_r10k_cache_barrier) Init(R10K_CACHE_BARRIER_NONE)
298-mr10k-cache-barrier=SETTING	Specify when r10k cache barriers should be inserted
299
300Enum
301Name(mips_r10k_cache_barrier_setting) Type(enum mips_r10k_cache_barrier_setting)
302Valid arguments to -mr10k-cache-barrier=:
303
304EnumValue
305Enum(mips_r10k_cache_barrier_setting) String(load-store) Value(R10K_CACHE_BARRIER_LOAD_STORE)
306
307EnumValue
308Enum(mips_r10k_cache_barrier_setting) String(store) Value(R10K_CACHE_BARRIER_STORE)
309
310EnumValue
311Enum(mips_r10k_cache_barrier_setting) String(none) Value(R10K_CACHE_BARRIER_NONE)
312
313mrelax-pic-calls
314Target Report Mask(RELAX_PIC_CALLS)
315Try to allow the linker to turn PIC calls into direct calls
316
317mshared
318Target Report Var(TARGET_SHARED) Init(1)
319When generating -mabicalls code, make the code suitable for use in shared libraries
320
321msingle-float
322Target Report RejectNegative Mask(SINGLE_FLOAT)
323Restrict the use of hardware floating-point instructions to 32-bit operations
324
325msmartmips
326Target Report Mask(SMARTMIPS)
327Use SmartMIPS instructions
328
329msoft-float
330Target Report RejectNegative Mask(SOFT_FLOAT_ABI)
331Prevent the use of all hardware floating-point instructions
332
333msplit-addresses
334Target Report Mask(SPLIT_ADDRESSES)
335Optimize lui/addiu address loads
336
337msym32
338Target Report Var(TARGET_SYM32)
339Assume all symbols have 32-bit values
340
341msynci
342Target Report Mask(SYNCI)
343Use synci instruction to invalidate i-cache
344
345mtune=
346Target RejectNegative Joined Var(mips_tune_option) ToLower Enum(mips_arch_opt_value)
347-mtune=PROCESSOR	Optimize the output for PROCESSOR
348
349muninit-const-in-rodata
350Target Report Var(TARGET_UNINIT_CONST_IN_RODATA)
351Put uninitialized constants in ROM (needs -membedded-data)
352
353mvr4130-align
354Target Report Mask(VR4130_ALIGN)
355Perform VR4130-specific alignment optimizations
356
357mxgot
358Target Report Var(TARGET_XGOT)
359Lift restrictions on GOT size
360
361noasmopt
362Driver
363