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; Options for the MIPS port of the compiler

;

; Copyright (C) 2005, 2007, 2008, 2010, 2011 Free Software Foundation, Inc.

;

; This file is part of GCC.

;

; GCC is free software; you can redistribute it and/or modify it under

; the terms of the GNU General Public License as published by the Free

; Software Foundation; either version 3, or (at your option) any later

; version.

;

; GCC is distributed in the hope that it will be useful, but WITHOUT

; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY

; or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public

; License for more details.

;

; You should have received a copy of the GNU General Public License

; along with GCC; see the file COPYING3.  If not see

; .

HeaderInclude

config/mips/mips-opts.h

EB

Driver

EL

Driver

mabi=

Target RejectNegative Joined Enum(mips_abi) Var(mips_abi) Init(MIPS_ABI_DEFAULT)

-mabi=ABI       Generate code that conforms to the given ABI

Enum

Name(mips_abi) Type(int)

Known MIPS ABIs (for use with the -mabi= option):

EnumValue

Enum(mips_abi) String(32) Value(ABI_32)

EnumValue

Enum(mips_abi) String(o64) Value(ABI_O64)

EnumValue

Enum(mips_abi) String(n32) Value(ABI_N32)

EnumValue

Enum(mips_abi) String(64) Value(ABI_64)

EnumValue

Enum(mips_abi) String(eabi) Value(ABI_EABI)

mabicalls

Target Report Mask(ABICALLS)

Generate code that can be used in SVR4-style dynamic objects

mad

Target Report Var(TARGET_MAD)

Use PMC-style 'mad' instructions

march=

Target RejectNegative Joined Var(mips_arch_option) ToLower Enum(mips_arch_opt_value)

-march=ISA      Generate code for the given ISA

mbranch-cost=

Target RejectNegative Joined UInteger Var(mips_branch_cost)

-mbranch-cost=COST      Set the cost of branches to roughly COST instructions

mbranch-likely

Target Report Mask(BRANCHLIKELY)

Use Branch Likely instructions, overriding the architecture default

mflip-mips16

Target Report Var(TARGET_FLIP_MIPS16)

Switch on/off MIPS16 ASE on alternating functions for compiler testing

mcheck-zero-division

Target Report Mask(CHECK_ZERO_DIV)

Trap on integer divide by zero

mcode-readable=

Target RejectNegative Joined Enum(mips_code_readable_setting) Var(mips_code_readable) Init(CODE_READABLE_YES)

-mcode-readable=SETTING Specify when instructions are allowed to access code

Enum

Name(mips_code_readable_setting) Type(enum mips_code_readable_setting)

Valid arguments to -mcode-readable=:

EnumValue

Enum(mips_code_readable_setting) String(yes) Value(CODE_READABLE_YES)

EnumValue

Enum(mips_code_readable_setting) String(pcrel) Value(CODE_READABLE_PCREL)

EnumValue

Enum(mips_code_readable_setting) String(no) Value(CODE_READABLE_NO)

mdivide-breaks

Target Report RejectNegative Mask(DIVIDE_BREAKS)

Use branch-and-break sequences to check for integer divide by zero

mdivide-traps

Target Report RejectNegative InverseMask(DIVIDE_BREAKS, DIVIDE_TRAPS)

Use trap instructions to check for integer divide by zero

mdmx

Target Report RejectNegative Var(TARGET_MDMX)

Allow the use of MDMX instructions

mdouble-float

Target Report RejectNegative InverseMask(SINGLE_FLOAT, DOUBLE_FLOAT)

Allow hardware floating-point instructions to cover both 32-bit and 64-bit operations

mdsp

Target Report Mask(DSP)

Use MIPS-DSP instructions

mdspr2

Target Report Mask(DSPR2)

Use MIPS-DSP REV 2 instructions

mdebug

Target Var(TARGET_DEBUG_MODE) Undocumented

mdebugd

Target Var(TARGET_DEBUG_D_MODE) Undocumented

meb

Target Report RejectNegative Mask(BIG_ENDIAN)

Use big-endian byte order

mel

Target Report RejectNegative InverseMask(BIG_ENDIAN, LITTLE_ENDIAN)

Use little-endian byte order

membedded-data

Target Report Var(TARGET_EMBEDDED_DATA)

Use ROM instead of RAM

mexplicit-relocs

Target Report Mask(EXPLICIT_RELOCS)

Use NewABI-style %reloc() assembly operators

mextern-sdata

Target Report Var(TARGET_EXTERN_SDATA) Init(1)

Use -G for data that is not defined by the current object

mfix-24k

Target Report Var(TARGET_FIX_24K)

Work around certain 24K errata

mfix-r4000

Target Report Mask(FIX_R4000)

Work around certain R4000 errata

mfix-r4400

Target Report Mask(FIX_R4400)

Work around certain R4400 errata

mfix-r10000

Target Report Mask(FIX_R10000)

Work around certain R10000 errata

mfix-sb1

Target Report Var(TARGET_FIX_SB1)

Work around errata for early SB-1 revision 2 cores

mfix-vr4120

Target Report Var(TARGET_FIX_VR4120)

Work around certain VR4120 errata

mfix-vr4130

Target Report Var(TARGET_FIX_VR4130)

Work around VR4130 mflo/mfhi errata

mfix4300

Target Report Var(TARGET_4300_MUL_FIX)

Work around an early 4300 hardware bug

mfp-exceptions

Target Report Mask(FP_EXCEPTIONS)

FP exceptions are enabled

mfp32

Target Report RejectNegative InverseMask(FLOAT64)

Use 32-bit floating-point registers

mfp64

Target Report RejectNegative Mask(FLOAT64)

Use 64-bit floating-point registers

mflush-func=

Target RejectNegative Joined Var(mips_cache_flush_func) Init(CACHE_FLUSH_FUNC)

-mflush-func=FUNC       Use FUNC to flush the cache before calling stack trampolines

mfused-madd

Target Report Mask(FUSED_MADD)

Generate floating-point multiply-add instructions

mgp32

Target Report RejectNegative InverseMask(64BIT)

Use 32-bit general registers

mgp64

Target Report RejectNegative Mask(64BIT)

Use 64-bit general registers

mgpopt

Target Report Var(TARGET_GPOPT) Init(1)

Use GP-relative addressing to access small data

mplt

Target Report Var(TARGET_PLT)

When generating -mabicalls code, allow executables to use PLTs and copy relocations

mhard-float

Target Report RejectNegative InverseMask(SOFT_FLOAT_ABI, HARD_FLOAT_ABI)

Allow the use of hardware floating-point ABI and instructions

minterlink-mips16

Target Report Var(TARGET_INTERLINK_MIPS16) Init(0)

Generate code that can be safely linked with MIPS16 code.

mips

Target RejectNegative Joined ToLower Enum(mips_mips_opt_value) Var(mips_isa_option)

-mipsN  Generate code for ISA level N

mips16

Target Report RejectNegative Mask(MIPS16)

Generate MIPS16 code

mips3d

Target Report RejectNegative Mask(MIPS3D)

Use MIPS-3D instructions

mllsc

Target Report Mask(LLSC)

Use ll, sc and sync instructions

mlocal-sdata

Target Report Var(TARGET_LOCAL_SDATA) Init(1)

Use -G for object-local data

mlong-calls

Target Report Var(TARGET_LONG_CALLS)

Use indirect calls

mlong32

Target Report RejectNegative InverseMask(LONG64, LONG32)

Use a 32-bit long type

mlong64

Target Report RejectNegative Mask(LONG64)

Use a 64-bit long type

mmcount-ra-address

Target Report Var(TARGET_MCOUNT_RA_ADDRESS)

Pass the address of the ra save location to _mcount in $12

mmemcpy

Target Report Mask(MEMCPY)

Don't optimize block moves

mmt

Target Report Var(TARGET_MT)

Allow the use of MT instructions

mno-float

Target Report RejectNegative Var(TARGET_NO_FLOAT) Condition(TARGET_SUPPORTS_NO_FLOAT)

Prevent the use of all floating-point operations

mno-flush-func

Target RejectNegative

Do not use a cache-flushing function before calling stack trampolines

mno-mdmx

Target Report RejectNegative Var(TARGET_MDMX, 0)

Do not use MDMX instructions

mno-mips16

Target Report RejectNegative InverseMask(MIPS16)

Generate normal-mode code

mno-mips3d

Target Report RejectNegative InverseMask(MIPS3D)

Do not use MIPS-3D instructions

mpaired-single

Target Report Mask(PAIRED_SINGLE_FLOAT)

Use paired-single floating-point instructions

mr10k-cache-barrier=

Target Joined RejectNegative Enum(mips_r10k_cache_barrier_setting) Var(mips_r10k_cache_barrier) Init(R10K_CACHE_BARRIER_NONE)

-mr10k-cache-barrier=SETTING    Specify when r10k cache barriers should be inserted

Enum

Name(mips_r10k_cache_barrier_setting) Type(enum mips_r10k_cache_barrier_setting)

Valid arguments to -mr10k-cache-barrier=:

EnumValue

Enum(mips_r10k_cache_barrier_setting) String(load-store) Value(R10K_CACHE_BARRIER_LOAD_STORE)

EnumValue

Enum(mips_r10k_cache_barrier_setting) String(store) Value(R10K_CACHE_BARRIER_STORE)

EnumValue

Enum(mips_r10k_cache_barrier_setting) String(none) Value(R10K_CACHE_BARRIER_NONE)

mrelax-pic-calls

Target Report Mask(RELAX_PIC_CALLS)

Try to allow the linker to turn PIC calls into direct calls

mshared

Target Report Var(TARGET_SHARED) Init(1)

When generating -mabicalls code, make the code suitable for use in shared libraries

msingle-float

Target Report RejectNegative Mask(SINGLE_FLOAT)

Restrict the use of hardware floating-point instructions to 32-bit operations

msmartmips

Target Report Mask(SMARTMIPS)

Use SmartMIPS instructions

msoft-float

Target Report RejectNegative Mask(SOFT_FLOAT_ABI)

Prevent the use of all hardware floating-point instructions

msplit-addresses

Target Report Mask(SPLIT_ADDRESSES)

Optimize lui/addiu address loads

msym32

Target Report Var(TARGET_SYM32)

Assume all symbols have 32-bit values

msynci

Target Report Mask(SYNCI)

Use synci instruction to invalidate i-cache

mtune=

Target RejectNegative Joined Var(mips_tune_option) ToLower Enum(mips_arch_opt_value)

-mtune=PROCESSOR        Optimize the output for PROCESSOR

muninit-const-in-rodata

Target Report Var(TARGET_UNINIT_CONST_IN_RODATA)

Put uninitialized constants in ROM (needs -membedded-data)

mvr4130-align

Target Report Mask(VR4130_ALIGN)

Perform VR4130-specific alignment optimizations

mxgot

Target Report Var(TARGET_XGOT)

Lift restrictions on GOT size

noasmopt

Driver