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 RejectNegative Joined Var(mips_arch_option) ToLower Enum(mips_arch_opt_value)
63 -march=ISA Generate code for the given ISA
66 Target RejectNegative Joined UInteger Var(mips_branch_cost)
67 -mbranch-cost=COST Set the cost of branches to roughly COST instructions
70 Target Report Mask(BRANCHLIKELY)
71 Use Branch Likely instructions, overriding the architecture default
74 Target Report Var(TARGET_FLIP_MIPS16)
75 Switch on/off MIPS16 ASE on alternating functions for compiler testing
78 Target Report Mask(CHECK_ZERO_DIV)
79 Trap on integer divide by zero
82 Target 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
86 Name(mips_code_readable_setting) Type(enum mips_code_readable_setting)
87 Valid arguments to -mcode-readable=:
90 Enum(mips_code_readable_setting) String(yes) Value(CODE_READABLE_YES)
93 Enum(mips_code_readable_setting) String(pcrel) Value(CODE_READABLE_PCREL)
96 Enum(mips_code_readable_setting) String(no) Value(CODE_READABLE_NO)
99 Target Report RejectNegative Mask(DIVIDE_BREAKS)
100 Use branch-and-break sequences to check for integer divide by zero
103 Target Report RejectNegative InverseMask(DIVIDE_BREAKS, DIVIDE_TRAPS)
104 Use trap instructions to check for integer divide by zero
107 Target Report RejectNegative Var(TARGET_MDMX)
108 Allow the use of MDMX instructions
111 Target Report RejectNegative InverseMask(SINGLE_FLOAT, DOUBLE_FLOAT)
112 Allow hardware floating-point instructions to cover both 32-bit and 64-bit operations
115 Target Report Mask(DSP)
116 Use MIPS-DSP instructions
119 Target Report Mask(DSPR2)
120 Use MIPS-DSP REV 2 instructions
123 Target Var(TARGET_DEBUG_MODE) Undocumented
126 Target Var(TARGET_DEBUG_D_MODE) Undocumented
129 Target Report RejectNegative Mask(BIG_ENDIAN)
130 Use big-endian byte order
133 Target Report RejectNegative InverseMask(BIG_ENDIAN, LITTLE_ENDIAN)
134 Use little-endian byte order
137 Target Report Var(TARGET_EMBEDDED_DATA)
138 Use ROM instead of RAM
141 Target Report Mask(EXPLICIT_RELOCS)
142 Use NewABI-style %reloc() assembly operators
145 Target Report Var(TARGET_EXTERN_SDATA) Init(1)
146 Use -G for data that is not defined by the current object
149 Target Report Var(TARGET_FIX_24K)
150 Work around certain 24K errata
153 Target Report Mask(FIX_R4000)
154 Work around certain R4000 errata
157 Target Report Mask(FIX_R4400)
158 Work around certain R4400 errata
161 Target Report Mask(FIX_R10000)
162 Work around certain R10000 errata
165 Target Report Var(TARGET_FIX_SB1)
166 Work around errata for early SB-1 revision 2 cores
169 Target Report Var(TARGET_FIX_VR4120)
170 Work around certain VR4120 errata
173 Target Report Var(TARGET_FIX_VR4130)
174 Work around VR4130 mflo/mfhi errata
177 Target Report Var(TARGET_4300_MUL_FIX)
178 Work around an early 4300 hardware bug
181 Target Report Mask(FP_EXCEPTIONS)
182 FP exceptions are enabled
185 Target Report RejectNegative InverseMask(FLOAT64)
186 Use 32-bit floating-point registers
189 Target Report RejectNegative Mask(FLOAT64)
190 Use 64-bit floating-point registers
193 Target 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
197 Target Report Mask(FUSED_MADD)
198 Generate floating-point multiply-add instructions
201 Target Report RejectNegative InverseMask(64BIT)
202 Use 32-bit general registers
205 Target Report RejectNegative Mask(64BIT)
206 Use 64-bit general registers
209 Target Report Var(TARGET_GPOPT) Init(1)
210 Use GP-relative addressing to access small data
213 Target Report Var(TARGET_PLT)
214 When generating -mabicalls code, allow executables to use PLTs and copy relocations
217 Target Report RejectNegative InverseMask(SOFT_FLOAT_ABI, HARD_FLOAT_ABI)
218 Allow the use of hardware floating-point ABI and instructions
221 Target Report Var(TARGET_INTERLINK_MIPS16) Init(0)
222 Generate code that can be safely linked with MIPS16 code.
225 Target RejectNegative Joined ToLower Enum(mips_mips_opt_value) Var(mips_isa_option)
226 -mipsN Generate code for ISA level N
229 Target Report RejectNegative Mask(MIPS16)
233 Target Report RejectNegative Mask(MIPS3D)
234 Use MIPS-3D instructions
237 Target Report Mask(LLSC)
238 Use ll, sc and sync instructions
241 Target Report Var(TARGET_LOCAL_SDATA) Init(1)
242 Use -G for object-local data
245 Target Report Var(TARGET_LONG_CALLS)
249 Target Report RejectNegative InverseMask(LONG64, LONG32)
250 Use a 32-bit long type
253 Target Report RejectNegative Mask(LONG64)
254 Use a 64-bit long type
257 Target Report Var(TARGET_MCOUNT_RA_ADDRESS)
258 Pass the address of the ra save location to _mcount in $12
261 Target Report Mask(MEMCPY)
262 Don't optimize block moves
265 Target Report Var(TARGET_MT)
266 Allow the use of MT instructions
269 Target Report RejectNegative Var(TARGET_NO_FLOAT) Condition(TARGET_SUPPORTS_NO_FLOAT)
270 Prevent the use of all floating-point operations
273 Target Report Var(TARGET_MCU)
277 Target RejectNegative
278 Do not use a cache-flushing function before calling stack trampolines
281 Target Report RejectNegative Var(TARGET_MDMX, 0)
282 Do not use MDMX instructions
285 Target Report RejectNegative InverseMask(MIPS16)
286 Generate normal-mode code
289 Target Report RejectNegative InverseMask(MIPS3D)
290 Do not use MIPS-3D instructions
293 Target Report Mask(PAIRED_SINGLE_FLOAT)
294 Use paired-single floating-point instructions
297 Target 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
301 Name(mips_r10k_cache_barrier_setting) Type(enum mips_r10k_cache_barrier_setting)
302 Valid arguments to -mr10k-cache-barrier=:
305 Enum(mips_r10k_cache_barrier_setting) String(load-store) Value(R10K_CACHE_BARRIER_LOAD_STORE)
308 Enum(mips_r10k_cache_barrier_setting) String(store) Value(R10K_CACHE_BARRIER_STORE)
311 Enum(mips_r10k_cache_barrier_setting) String(none) Value(R10K_CACHE_BARRIER_NONE)
314 Target Report Mask(RELAX_PIC_CALLS)
315 Try to allow the linker to turn PIC calls into direct calls
318 Target Report Var(TARGET_SHARED) Init(1)
319 When generating -mabicalls code, make the code suitable for use in shared libraries
322 Target Report RejectNegative Mask(SINGLE_FLOAT)
323 Restrict the use of hardware floating-point instructions to 32-bit operations
326 Target Report Mask(SMARTMIPS)
327 Use SmartMIPS instructions
330 Target Report RejectNegative Mask(SOFT_FLOAT_ABI)
331 Prevent the use of all hardware floating-point instructions
334 Target Report Mask(SPLIT_ADDRESSES)
335 Optimize lui/addiu address loads
338 Target Report Var(TARGET_SYM32)
339 Assume all symbols have 32-bit values
342 Target Report Mask(SYNCI)
343 Use synci instruction to invalidate i-cache
346 Target RejectNegative Joined Var(mips_tune_option) ToLower Enum(mips_arch_opt_value)
347 -mtune=PROCESSOR Optimize the output for PROCESSOR
349 muninit-const-in-rodata
350 Target Report Var(TARGET_UNINIT_CONST_IN_RODATA)
351 Put uninitialized constants in ROM (needs -membedded-data)
354 Target Report Mask(VR4130_ALIGN)
355 Perform VR4130-specific alignment optimizations
358 Target Report Var(TARGET_XGOT)
359 Lift restrictions on GOT size