; 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
-int ix86_isa_flags = TARGET_64BIT_DEFAULT | TARGET_SUBTARGET_ISA_DEFAULT
+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
-int ix86_isa_flags_explicit
+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 tune
-;; -mfpath=
-TargetSave
-unsigned char fpmath
-
;; CPU schedule model
TargetSave
unsigned char schedule
;; which flags were passed by the user
TargetSave
-int x_ix86_isa_flags_explicit
+HOST_WIDE_INT x_ix86_isa_flags_explicit
;; which flags were passed by the user
TargetSave
Align some doubles on dword boundary
malign-functions=
-Target RejectNegative Joined Var(ix86_align_funcs_string)
+Target RejectNegative Joined UInteger
Function starts are aligned to this power of 2
malign-jumps=
-Target RejectNegative Joined Var(ix86_align_jumps_string)
+Target RejectNegative Joined UInteger
Jump targets are aligned to this power of 2
malign-loops=
-Target RejectNegative Joined Var(ix86_align_loops_string)
+Target RejectNegative Joined UInteger
Loop code aligned to this power of 2
malign-stringops
Generate code for given CPU
masm=
-Target RejectNegative Joined Var(ix86_asm_string)
+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 Var(ix86_branch_cost_string)
+Target RejectNegative Joined UInteger Var(ix86_branch_cost)
Branches are this expensive (1-5, arbitrary units)
mlarge-data-threshold=
-Target RejectNegative Joined Var(ix86_section_threshold_string)
+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 Var(ix86_cmodel_string)
+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)
Return values of functions in FPU registers
mfpmath=
-Target RejectNegative Joined Var(ix86_fpmath_string)
+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
Target Report Mask(OMIT_LEAF_FRAME_POINTER) Save
Omit the frame pointer in leaf functions
-mpc
-Target RejectNegative Report Joined Var(ix87_precision_string)
-Set 80387 floating-point precision (-mpc32, -mpc64, -mpc80)
+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 Var(ix86_preferred_stack_boundary_string)
+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 Var(ix86_incoming_stack_boundary_string)
+Target RejectNegative Joined UInteger Var(ix86_incoming_stack_boundary_arg)
Assume incoming stack aligned to this power of 2
mpush-args
Use red-zone in the x86-64 code
mregparm=
-Target RejectNegative Joined Var(ix86_regparm_string)
+Target RejectNegative Joined UInteger Var(ix86_regparm)
Number of registers used to pass integer arguments
mrtd
Enable stack probing
mstringop-strategy=
-Target RejectNegative Joined Var(ix86_stringop_string)
+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_string)
+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
Schedule code for given CPU
mabi=
-Target RejectNegative Joined Var(ix86_abi_string)
+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_string)
+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
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.
mdispatch-scheduler
Target RejectNegative Var(flag_dispatch_scheduler)
-Do dispatch scheduling if processor is bdver1 and Haifa scheduling
+Do dispatch scheduling if processor is bdver1 or bdver2 and Haifa scheduling
is selected.
mprefer-avx128
-Target Report Var(flag_prefer_avx128) Init(0)
+Target Report Mask(PREFER_AVX128) SAVE
Use 128-bit AVX instructions instead of 256-bit AVX instructions in the auto-vectorizer.
;; ISA support
Generate 32bit i386 code
m64
-Target RejectNegative Negative(m32) Report Mask(ISA_64BIT) Var(ix86_isa_flags) Save
+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
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
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
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