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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [config/] [i386/] [i386.opt] - Rev 758
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; Options for the IA-32 and AMD64 ports of the compiler.
; Copyright (C) 2005, 2006, 2007, 2008, 2009,
; 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
; <http://www.gnu.org/licenses/>.
HeaderInclude
config/i386/i386-opts.h
; Bit flags that specify the ISA we are compiling for.
Variable
HOST_WIDE_INT ix86_isa_flags = TARGET_64BIT_DEFAULT | TARGET_SUBTARGET_ISA_DEFAULT
; A mask of ix86_isa_flags that includes bit X if X was set or cleared
; on the command line.
Variable
HOST_WIDE_INT ix86_isa_flags_explicit
TargetVariable
int recip_mask = RECIP_MASK_DEFAULT
Variable
int recip_mask_explicit
TargetSave
int x_recip_mask_explicit
;; Definitions to add to the cl_target_option structure
;; -march= processor
TargetSave
unsigned char arch
;; -mtune= processor
TargetSave
unsigned char tune
;; CPU schedule model
TargetSave
unsigned char schedule
;; branch cost
TargetSave
unsigned char branch_cost
;; which flags were passed by the user
TargetSave
HOST_WIDE_INT x_ix86_isa_flags_explicit
;; which flags were passed by the user
TargetSave
int ix86_target_flags_explicit
;; whether -mtune was not specified
TargetSave
unsigned char tune_defaulted
;; whether -march was specified
TargetSave
unsigned char arch_specified
;; x86 options
m128bit-long-double
Target RejectNegative Report Mask(128BIT_LONG_DOUBLE) Save
sizeof(long double) is 16
m80387
Target Report Mask(80387) Save
Use hardware fp
m96bit-long-double
Target RejectNegative Report InverseMask(128BIT_LONG_DOUBLE) Save
sizeof(long double) is 12
maccumulate-outgoing-args
Target Report Mask(ACCUMULATE_OUTGOING_ARGS) Save
Reserve space for outgoing arguments in the function prologue
malign-double
Target Report Mask(ALIGN_DOUBLE) Save
Align some doubles on dword boundary
malign-functions=
Target RejectNegative Joined UInteger
Function starts are aligned to this power of 2
malign-jumps=
Target RejectNegative Joined UInteger
Jump targets are aligned to this power of 2
malign-loops=
Target RejectNegative Joined UInteger
Loop code aligned to this power of 2
malign-stringops
Target RejectNegative Report InverseMask(NO_ALIGN_STRINGOPS, ALIGN_STRINGOPS) Save
Align destination of the string operations
march=
Target RejectNegative Joined Var(ix86_arch_string)
Generate code for given CPU
masm=
Target RejectNegative Joined Enum(asm_dialect) Var(ix86_asm_dialect) Init(ASM_ATT)
Use given assembler dialect
Enum
Name(asm_dialect) Type(enum asm_dialect)
Known assembler dialects (for use with the -masm-dialect= option):
EnumValue
Enum(asm_dialect) String(intel) Value(ASM_INTEL)
EnumValue
Enum(asm_dialect) String(att) Value(ASM_ATT)
mbranch-cost=
Target RejectNegative Joined UInteger Var(ix86_branch_cost)
Branches are this expensive (1-5, arbitrary units)
mlarge-data-threshold=
Target RejectNegative Joined UInteger Var(ix86_section_threshold) Init(65536)
Data greater than given threshold will go into .ldata section in x86-64 medium model
mcmodel=
Target RejectNegative Joined Enum(cmodel) Var(ix86_cmodel) Init(CM_32)
Use given x86-64 code model
Enum
Name(cmodel) Type(enum cmodel)
Known code models (for use with the -mcmodel= option):
EnumValue
Enum(cmodel) String(small) Value(CM_SMALL)
EnumValue
Enum(cmodel) String(medium) Value(CM_MEDIUM)
EnumValue
Enum(cmodel) String(large) Value(CM_LARGE)
EnumValue
Enum(cmodel) String(32) Value(CM_32)
EnumValue
Enum(cmodel) String(kernel) Value(CM_KERNEL)
mcpu=
Target RejectNegative Joined Undocumented Alias(mtune=) Warn(%<-mcpu=%> is deprecated; use %<-mtune=%> or %<-march=%> instead)
mfancy-math-387
Target RejectNegative Report InverseMask(NO_FANCY_MATH_387, USE_FANCY_MATH_387) Save
Generate sin, cos, sqrt for FPU
mforce-drap
Target Report Var(ix86_force_drap)
Always use Dynamic Realigned Argument Pointer (DRAP) to realign stack
mfp-ret-in-387
Target Report Mask(FLOAT_RETURNS) Save
Return values of functions in FPU registers
mfpmath=
Target RejectNegative Joined Var(ix86_fpmath) Enum(fpmath_unit) Init(FPMATH_387) Save
Generate floating point mathematics using given instruction set
Enum
Name(fpmath_unit) Type(enum fpmath_unit)
Valid arguments to -mfpmath=:
EnumValue
Enum(fpmath_unit) String(387) Value(FPMATH_387)
EnumValue
Enum(fpmath_unit) String(sse) Value(FPMATH_SSE)
EnumValue
Enum(fpmath_unit) String(387,sse) Value({(enum fpmath_unit) (FPMATH_SSE | FPMATH_387)})
EnumValue
Enum(fpmath_unit) String(387+sse) Value({(enum fpmath_unit) (FPMATH_SSE | FPMATH_387)})
EnumValue
Enum(fpmath_unit) String(sse,387) Value({(enum fpmath_unit) (FPMATH_SSE | FPMATH_387)})
EnumValue
Enum(fpmath_unit) String(sse+387) Value({(enum fpmath_unit) (FPMATH_SSE | FPMATH_387)})
EnumValue
Enum(fpmath_unit) String(both) Value({(enum fpmath_unit) (FPMATH_SSE | FPMATH_387)})
mhard-float
Target RejectNegative Mask(80387) MaskExists Save
Use hardware fp
mieee-fp
Target Report Mask(IEEE_FP) Save
Use IEEE math for fp comparisons
minline-all-stringops
Target Report Mask(INLINE_ALL_STRINGOPS) Save
Inline all known string operations
minline-stringops-dynamically
Target Report Mask(INLINE_STRINGOPS_DYNAMICALLY) Save
Inline memset/memcpy string operations, but perform inline version only for small blocks
mintel-syntax
Target Undocumented Alias(masm=, intel, att) Warn(%<-mintel-syntax%> and %<-mno-intel-syntax%> are deprecated; use %<-masm=intel%> and %<-masm=att%> instead)
;; Deprecated
mms-bitfields
Target Report Mask(MS_BITFIELD_LAYOUT) Save
Use native (MS) bitfield layout
mno-align-stringops
Target RejectNegative Report Mask(NO_ALIGN_STRINGOPS) Undocumented Save
mno-fancy-math-387
Target RejectNegative Report Mask(NO_FANCY_MATH_387) Undocumented Save
mno-push-args
Target RejectNegative Report Mask(NO_PUSH_ARGS) Undocumented Save
mno-red-zone
Target RejectNegative Report Mask(NO_RED_ZONE) Undocumented Save
momit-leaf-frame-pointer
Target Report Mask(OMIT_LEAF_FRAME_POINTER) Save
Omit the frame pointer in leaf functions
mpc32
Target RejectNegative Report
Set 80387 floating-point precision to 32-bit
mpc64
Target RejectNegative Report
Set 80387 floating-point precision to 64-bit
mpc80
Target RejectNegative Report
Set 80387 floating-point precision to 80-bit
mpreferred-stack-boundary=
Target RejectNegative Joined UInteger Var(ix86_preferred_stack_boundary_arg)
Attempt to keep stack aligned to this power of 2
mincoming-stack-boundary=
Target RejectNegative Joined UInteger Var(ix86_incoming_stack_boundary_arg)
Assume incoming stack aligned to this power of 2
mpush-args
Target Report InverseMask(NO_PUSH_ARGS, PUSH_ARGS) Save
Use push instructions to save outgoing arguments
mred-zone
Target RejectNegative Report InverseMask(NO_RED_ZONE, RED_ZONE) Save
Use red-zone in the x86-64 code
mregparm=
Target RejectNegative Joined UInteger Var(ix86_regparm)
Number of registers used to pass integer arguments
mrtd
Target Report Mask(RTD) Save
Alternate calling convention
msoft-float
Target InverseMask(80387) Save
Do not use hardware fp
msseregparm
Target RejectNegative Mask(SSEREGPARM) Save
Use SSE register passing conventions for SF and DF mode
mstackrealign
Target Report Var(ix86_force_align_arg_pointer) Init(-1)
Realign stack in prologue
mstack-arg-probe
Target Report Mask(STACK_PROBE) Save
Enable stack probing
mstringop-strategy=
Target RejectNegative Joined Enum(stringop_alg) Var(ix86_stringop_alg) Init(no_stringop)
Chose strategy to generate stringop using
Enum
Name(stringop_alg) Type(enum stringop_alg)
Valid arguments to -mstringop-strategy=:
EnumValue
Enum(stringop_alg) String(rep_byte) Value(rep_prefix_1_byte)
EnumValue
Enum(stringop_alg) String(libcall) Value(libcall)
EnumValue
Enum(stringop_alg) String(rep_4byte) Value(rep_prefix_4_byte)
EnumValue
Enum(stringop_alg) String(rep_8byte) Value(rep_prefix_8_byte)
EnumValue
Enum(stringop_alg) String(byte_loop) Value(loop_1_byte)
EnumValue
Enum(stringop_alg) String(loop) Value(loop)
EnumValue
Enum(stringop_alg) String(unrolled_loop) Value(unrolled_loop)
mtls-dialect=
Target RejectNegative Joined Var(ix86_tls_dialect) Enum(tls_dialect) Init(TLS_DIALECT_GNU)
Use given thread-local storage dialect
Enum
Name(tls_dialect) Type(enum tls_dialect)
Known TLS dialects (for use with the -mtls-dialect= option):
EnumValue
Enum(tls_dialect) String(gnu) Value(TLS_DIALECT_GNU)
EnumValue
Enum(tls_dialect) String(gnu2) Value(TLS_DIALECT_GNU2)
mtls-direct-seg-refs
Target Report Mask(TLS_DIRECT_SEG_REFS)
Use direct references against %gs when accessing tls data
mtune=
Target RejectNegative Joined Var(ix86_tune_string)
Schedule code for given CPU
mabi=
Target RejectNegative Joined Var(ix86_abi) Enum(calling_abi) Init(SYSV_ABI)
Generate code that conforms to the given ABI
Enum
Name(calling_abi) Type(enum calling_abi)
Known ABIs (for use with the -mabi= option):
EnumValue
Enum(calling_abi) String(sysv) Value(SYSV_ABI)
EnumValue
Enum(calling_abi) String(ms) Value(MS_ABI)
mveclibabi=
Target RejectNegative Joined Var(ix86_veclibabi_type) Enum(ix86_veclibabi) Init(ix86_veclibabi_type_none)
Vector library ABI to use
Enum
Name(ix86_veclibabi) Type(enum ix86_veclibabi)
Known vectorization library ABIs (for use with the -mveclibabi= option):
EnumValue
Enum(ix86_veclibabi) String(svml) Value(ix86_veclibabi_type_svml)
EnumValue
Enum(ix86_veclibabi) String(acml) Value(ix86_veclibabi_type_acml)
mvect8-ret-in-mem
Target Report Mask(VECT8_RETURNS) Save
Return 8-byte vectors in memory
mrecip
Target Report Mask(RECIP) Save
Generate reciprocals instead of divss and sqrtss.
mrecip=
Target Report RejectNegative Joined Var(ix86_recip_name)
Control generation of reciprocal estimates.
mcld
Target Report Mask(CLD) Save
Generate cld instruction in the function prologue.
mvzeroupper
Target Report Mask(VZEROUPPER) Save
Generate vzeroupper instruction before a transfer of control flow out of
the function.
mdispatch-scheduler
Target RejectNegative Var(flag_dispatch_scheduler)
Do dispatch scheduling if processor is bdver1 or bdver2 and Haifa scheduling
is selected.
mprefer-avx128
Target Report Mask(PREFER_AVX128) SAVE
Use 128-bit AVX instructions instead of 256-bit AVX instructions in the auto-vectorizer.
;; ISA support
m32
Target RejectNegative Negative(m64) Report InverseMask(ISA_64BIT) Var(ix86_isa_flags) Save
Generate 32bit i386 code
m64
Target RejectNegative Negative(mx32) Report Mask(ISA_64BIT) Var(ix86_isa_flags) Save
Generate 64bit x86-64 code
mx32
Target RejectNegative Negative(m32) Report Mask(ISA_X32) Var(ix86_isa_flags) Save
Generate 32bit x86-64 code
mmmx
Target Report Mask(ISA_MMX) Var(ix86_isa_flags) Save
Support MMX built-in functions
m3dnow
Target Report Mask(ISA_3DNOW) Var(ix86_isa_flags) Save
Support 3DNow! built-in functions
m3dnowa
Target Undocumented Mask(ISA_3DNOW_A) Var(ix86_isa_flags) Save
Support Athlon 3Dnow! built-in functions
msse
Target Report Mask(ISA_SSE) Var(ix86_isa_flags) Save
Support MMX and SSE built-in functions and code generation
msse2
Target Report Mask(ISA_SSE2) Var(ix86_isa_flags) Save
Support MMX, SSE and SSE2 built-in functions and code generation
msse3
Target Report Mask(ISA_SSE3) Var(ix86_isa_flags) Save
Support MMX, SSE, SSE2 and SSE3 built-in functions and code generation
mssse3
Target Report Mask(ISA_SSSE3) Var(ix86_isa_flags) Save
Support MMX, SSE, SSE2, SSE3 and SSSE3 built-in functions and code generation
msse4.1
Target Report Mask(ISA_SSE4_1) Var(ix86_isa_flags) Save
Support MMX, SSE, SSE2, SSE3, SSSE3 and SSE4.1 built-in functions and code generation
msse4.2
Target Report Mask(ISA_SSE4_2) Var(ix86_isa_flags) Save
Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1 and SSE4.2 built-in functions and code generation
msse4
Target RejectNegative Report Mask(ISA_SSE4_2) MaskExists Var(ix86_isa_flags) Save
Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1 and SSE4.2 built-in functions and code generation
mno-sse4
Target RejectNegative Report InverseMask(ISA_SSE4_1) MaskExists Var(ix86_isa_flags) Save
Do not support SSE4.1 and SSE4.2 built-in functions and code generation
msse5
Target Undocumented Alias(mavx) Warn(%<-msse5%> was removed)
;; Deprecated
mavx
Target Report Mask(ISA_AVX) Var(ix86_isa_flags) Save
Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2 and AVX built-in functions and code generation
mavx2
Target Report Mask(ISA_AVX2) Var(ix86_isa_flags) Save
Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX and AVX2 built-in functions and code generation
mfma
Target Report Mask(ISA_FMA) Var(ix86_isa_flags) Save
Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX and FMA built-in functions and code generation
msse4a
Target Report Mask(ISA_SSE4A) Var(ix86_isa_flags) Save
Support MMX, SSE, SSE2, SSE3 and SSE4A built-in functions and code generation
mfma4
Target Report Mask(ISA_FMA4) Var(ix86_isa_flags) Save
Support FMA4 built-in functions and code generation
mxop
Target Report Mask(ISA_XOP) Var(ix86_isa_flags) Save
Support XOP built-in functions and code generation
mlwp
Target Report Mask(ISA_LWP) Var(ix86_isa_flags) Save
Support LWP built-in functions and code generation
mabm
Target Report Mask(ISA_ABM) Var(ix86_isa_flags) Save
Support code generation of Advanced Bit Manipulation (ABM) instructions.
mpopcnt
Target Report Mask(ISA_POPCNT) Var(ix86_isa_flags) Save
Support code generation of popcnt instruction.
mbmi
Target Report Mask(ISA_BMI) Var(ix86_isa_flags) Save
Support BMI built-in functions and code generation
mbmi2
Target Report Mask(ISA_BMI2) Var(ix86_isa_flags) Save
Support BMI2 built-in functions and code generation
mlzcnt
Target Report Mask(ISA_LZCNT) Var(ix86_isa_flags) Save
Support LZCNT built-in function and code generation
mtbm
Target Report Mask(ISA_TBM) Var(ix86_isa_flags) Save
Support TBM built-in functions and code generation
mcx16
Target Report Mask(ISA_CX16) Var(ix86_isa_flags) Save
Support code generation of cmpxchg16b instruction.
msahf
Target Report Mask(ISA_SAHF) Var(ix86_isa_flags) Save
Support code generation of sahf instruction in 64bit x86-64 code.
mmovbe
Target Report Mask(ISA_MOVBE) Var(ix86_isa_flags) Save
Support code generation of movbe instruction.
mcrc32
Target Report Mask(ISA_CRC32) Var(ix86_isa_flags) Save
Support code generation of crc32 instruction.
maes
Target Report Mask(ISA_AES) Var(ix86_isa_flags) Save
Support AES built-in functions and code generation
mpclmul
Target Report Mask(ISA_PCLMUL) Var(ix86_isa_flags) Save
Support PCLMUL built-in functions and code generation
msse2avx
Target Report Var(ix86_sse2avx)
Encode SSE instructions with VEX prefix
mfsgsbase
Target Report Mask(ISA_FSGSBASE) Var(ix86_isa_flags) Save
Support FSGSBASE built-in functions and code generation
mrdrnd
Target Report Mask(ISA_RDRND) Var(ix86_isa_flags) Save
Support RDRND built-in functions and code generation
mf16c
Target Report Mask(ISA_F16C) Var(ix86_isa_flags) Save
Support F16C built-in functions and code generation
mfentry
Target Report Var(flag_fentry) Init(-1)
Emit profiling counter call at function entry before prologue.
m8bit-idiv
Target Report Mask(USE_8BIT_IDIV) Save
Expand 32bit/64bit integer divide into 8bit unsigned integer divide with run-time check
mavx256-split-unaligned-load
Target Report Mask(AVX256_SPLIT_UNALIGNED_LOAD) Save
Split 32-byte AVX unaligned load
mavx256-split-unaligned-store
Target Report Mask(AVX256_SPLIT_UNALIGNED_STORE) Save
Split 32-byte AVX unaligned store
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