1 ; Options for the MIPS port of the compiler
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22 config/mips/mips-opts.h
31 Target RejectNegative Joined Enum(mips_abi) Var(mips_abi) Init(MIPS_ABI_DEFAULT)
32 -mabi=ABI Generate code that conforms to the given ABI
35 Name(mips_abi) Type(int)
36 Known MIPS ABIs (for use with the -mabi= option):
39 Enum(mips_abi) String(32) Value(ABI_32)
42 Enum(mips_abi) String(o64) Value(ABI_O64)
45 Enum(mips_abi) String(n32) Value(ABI_N32)
48 Enum(mips_abi) String(64) Value(ABI_64)
51 Enum(mips_abi) String(eabi) Value(ABI_EABI)
54 Target Report Mask(ABICALLS)
55 Generate code that can be used in SVR4-style dynamic objects
58 Target Report Var(TARGET_MAD)
59 Use PMC-style 'mad' instructions
62 Target Report Mask(IMADD)
63 Use integer madd/msub instructions
66 Target RejectNegative Joined Var(mips_arch_option) ToLower Enum(mips_arch_opt_value)
67 -march=ISA Generate code for the given ISA
70 Target RejectNegative Joined UInteger Var(mips_branch_cost)
71 -mbranch-cost=COST Set the cost of branches to roughly COST instructions
74 Target Report Mask(BRANCHLIKELY)
75 Use Branch Likely instructions, overriding the architecture default
78 Target Report Var(TARGET_FLIP_MIPS16)
79 Switch on/off MIPS16 ASE on alternating functions for compiler testing
82 Target Report Mask(CHECK_ZERO_DIV)
83 Trap on integer divide by zero
86 Target RejectNegative Joined Enum(mips_code_readable_setting) Var(mips_code_readable) Init(CODE_READABLE_YES)
87 -mcode-readable=SETTING Specify when instructions are allowed to access code
90 Name(mips_code_readable_setting) Type(enum mips_code_readable_setting)
91 Valid arguments to -mcode-readable=:
94 Enum(mips_code_readable_setting) String(yes) Value(CODE_READABLE_YES)
97 Enum(mips_code_readable_setting) String(pcrel) Value(CODE_READABLE_PCREL)
100 Enum(mips_code_readable_setting) String(no) Value(CODE_READABLE_NO)
103 Target Report RejectNegative Mask(DIVIDE_BREAKS)
104 Use branch-and-break sequences to check for integer divide by zero
107 Target Report RejectNegative InverseMask(DIVIDE_BREAKS, DIVIDE_TRAPS)
108 Use trap instructions to check for integer divide by zero
111 Target Report RejectNegative Var(TARGET_MDMX)
112 Allow the use of MDMX instructions
115 Target Report RejectNegative InverseMask(SINGLE_FLOAT, DOUBLE_FLOAT)
116 Allow hardware floating-point instructions to cover both 32-bit and 64-bit operations
119 Target Report Mask(DSP)
120 Use MIPS-DSP instructions
123 Target Report Mask(DSPR2)
124 Use MIPS-DSP REV 2 instructions
127 Target Var(TARGET_DEBUG_MODE) Undocumented
130 Target Var(TARGET_DEBUG_D_MODE) Undocumented
133 Target Report RejectNegative Mask(BIG_ENDIAN)
134 Use big-endian byte order
137 Target Report RejectNegative InverseMask(BIG_ENDIAN, LITTLE_ENDIAN)
138 Use little-endian byte order
141 Target Report Var(TARGET_EMBEDDED_DATA)
142 Use ROM instead of RAM
145 Target Report Mask(EXPLICIT_RELOCS)
146 Use NewABI-style %reloc() assembly operators
149 Target Report Var(TARGET_EXTERN_SDATA) Init(1)
150 Use -G for data that is not defined by the current object
153 Target Report Var(TARGET_FIX_24K)
154 Work around certain 24K errata
157 Target Report Mask(FIX_R4000)
158 Work around certain R4000 errata
161 Target Report Mask(FIX_R4400)
162 Work around certain R4400 errata
165 Target Report Mask(FIX_R10000)
166 Work around certain R10000 errata
169 Target Report Var(TARGET_FIX_SB1)
170 Work around errata for early SB-1 revision 2 cores
173 Target Report Var(TARGET_FIX_VR4120)
174 Work around certain VR4120 errata
177 Target Report Var(TARGET_FIX_VR4130)
178 Work around VR4130 mflo/mfhi errata
181 Target Report Var(TARGET_4300_MUL_FIX)
182 Work around an early 4300 hardware bug
185 Target Report Mask(FP_EXCEPTIONS)
186 FP exceptions are enabled
189 Target Report RejectNegative InverseMask(FLOAT64)
190 Use 32-bit floating-point registers
193 Target Report RejectNegative Mask(FLOAT64)
194 Use 64-bit floating-point registers
197 Target RejectNegative Joined Var(mips_cache_flush_func) Init(CACHE_FLUSH_FUNC)
198 -mflush-func=FUNC Use FUNC to flush the cache before calling stack trampolines
201 Target Report Mask(FUSED_MADD)
202 Generate floating-point multiply-add instructions
205 Target Report RejectNegative InverseMask(64BIT)
206 Use 32-bit general registers
209 Target Report RejectNegative Mask(64BIT)
210 Use 64-bit general registers
213 Target Report Var(TARGET_GPOPT) Init(1)
214 Use GP-relative addressing to access small data
217 Target Report Var(TARGET_PLT)
218 When generating -mabicalls code, allow executables to use PLTs and copy relocations
221 Target Report RejectNegative InverseMask(SOFT_FLOAT_ABI, HARD_FLOAT_ABI)
222 Allow the use of hardware floating-point ABI and instructions
224 minterlink-compressed
225 Target Report Var(TARGET_INTERLINK_COMPRESSED) Init(0)
226 Generate code that is link-compatible with MIPS16 and microMIPS code.
229 Target Report Var(TARGET_INTERLINK_COMPRESSED) Init(0)
230 An alias for minterlink-compressed provided for backward-compatibility.
233 Target RejectNegative Joined ToLower Enum(mips_mips_opt_value) Var(mips_isa_option)
234 -mipsN Generate code for ISA level N
237 Target Report RejectNegative Mask(MIPS16)
241 Target Report RejectNegative Mask(MIPS3D)
242 Use MIPS-3D instructions
245 Target Report Mask(LLSC)
246 Use ll, sc and sync instructions
249 Target Report Var(TARGET_LOCAL_SDATA) Init(1)
250 Use -G for object-local data
253 Target Report Var(TARGET_LONG_CALLS)
257 Target Report RejectNegative InverseMask(LONG64, LONG32)
258 Use a 32-bit long type
261 Target Report RejectNegative Mask(LONG64)
262 Use a 64-bit long type
265 Target Report Var(TARGET_MCOUNT_RA_ADDRESS)
266 Pass the address of the ra save location to _mcount in $12
269 Target Report Mask(MEMCPY)
270 Don't optimize block moves
273 Target Report Mask(MICROMIPS)
274 Use microMIPS instructions
277 Target Report Var(TARGET_MT)
278 Allow the use of MT instructions
281 Target Report RejectNegative Var(TARGET_NO_FLOAT) Condition(TARGET_SUPPORTS_NO_FLOAT)
282 Prevent the use of all floating-point operations
285 Target Report Var(TARGET_MCU)
289 Target RejectNegative
290 Do not use a cache-flushing function before calling stack trampolines
293 Target Report RejectNegative Var(TARGET_MDMX, 0)
294 Do not use MDMX instructions
297 Target Report RejectNegative InverseMask(MIPS16)
298 Generate normal-mode code
301 Target Report RejectNegative InverseMask(MIPS3D)
302 Do not use MIPS-3D instructions
305 Target Report Mask(PAIRED_SINGLE_FLOAT)
306 Use paired-single floating-point instructions
309 Target Joined RejectNegative Enum(mips_r10k_cache_barrier_setting) Var(mips_r10k_cache_barrier) Init(R10K_CACHE_BARRIER_NONE)
310 -mr10k-cache-barrier=SETTING Specify when r10k cache barriers should be inserted
313 Name(mips_r10k_cache_barrier_setting) Type(enum mips_r10k_cache_barrier_setting)
314 Valid arguments to -mr10k-cache-barrier=:
317 Enum(mips_r10k_cache_barrier_setting) String(load-store) Value(R10K_CACHE_BARRIER_LOAD_STORE)
320 Enum(mips_r10k_cache_barrier_setting) String(store) Value(R10K_CACHE_BARRIER_STORE)
323 Enum(mips_r10k_cache_barrier_setting) String(none) Value(R10K_CACHE_BARRIER_NONE)
326 Target Report Mask(RELAX_PIC_CALLS)
327 Try to allow the linker to turn PIC calls into direct calls
330 Target Report Var(TARGET_SHARED) Init(1)
331 When generating -mabicalls code, make the code suitable for use in shared libraries
334 Target Report RejectNegative Mask(SINGLE_FLOAT)
335 Restrict the use of hardware floating-point instructions to 32-bit operations
338 Target Report Mask(SMARTMIPS)
339 Use SmartMIPS instructions
342 Target Report RejectNegative Mask(SOFT_FLOAT_ABI)
343 Prevent the use of all hardware floating-point instructions
346 Target Report Mask(SPLIT_ADDRESSES)
347 Optimize lui/addiu address loads
350 Target Report Var(TARGET_SYM32)
351 Assume all symbols have 32-bit values
354 Target Report Mask(SYNCI)
355 Use synci instruction to invalidate i-cache
358 Target RejectNegative Joined Var(mips_tune_option) ToLower Enum(mips_arch_opt_value)
359 -mtune=PROCESSOR Optimize the output for PROCESSOR
361 muninit-const-in-rodata
362 Target Report Var(TARGET_UNINIT_CONST_IN_RODATA)
363 Put uninitialized constants in ROM (needs -membedded-data)
366 Target Report Mask(VR4130_ALIGN)
367 Perform VR4130-specific alignment optimizations
370 Target Report Var(TARGET_XGOT)
371 Lift restrictions on GOT size