查看CPU支持的指令集和特性
1）gcc -c -Q -march=native --help=target
2）结果
The following options are target specific:
-m128bit-long-double [enabled]
-m16 [disabled]
-m32 [disabled]
-m3dnow [disabled]
-m3dnowa [disabled]
-m64 [enabled]
-m80387 [enabled]
-m8bit-idiv [disabled]
-m96bit-long-double [disabled]
-mabi= sysv
-mabm [enabled]
-maccumulate-outgoing-args [disabled]
-maddress-mode= long
-madx [enabled]
-maes [enabled]
-malign-data= compat
-malign-double [disabled]
-malign-functions= 0
-malign-jumps= 0
-malign-loops= 0
-malign-stringops [enabled]
-mandroid [disabled]
-march= icelake-server
-masm= att
-mavx [enabled]
-mavx2 [enabled]
-mavx256-split-unaligned-load [disabled]
-mavx256-split-unaligned-store [disabled]
-mavx5124fmaps [disabled]
-mavx5124vnniw [disabled]
-mavx512bitalg [enabled]
-mavx512bw [enabled]
-mavx512cd [enabled]
-mavx512dq [enabled]
-mavx512er [disabled]
-mavx512f [enabled]
-mavx512ifma [enabled]
-mavx512pf [disabled]
-mavx512vbmi [enabled]
-mavx512vbmi2 [enabled]
-mavx512vl [enabled]
-mavx512vnni [enabled]
-mavx512vpopcntdq [enabled]
-mbionic [disabled]
-mbmi [enabled]
-mbmi2 [enabled]
-mbranch-cost=<0,5> 3
-mcall-ms2sysv-xlogues [disabled]
-mcet-switch [disabled]
-mcld [disabled]
-mclflushopt [enabled]
-mclwb [enabled]
-mclzero [disabled]
-mcmodel= [default]
-mcpu=
-mcrc32 [disabled]
-mcx16 [enabled]
-mdispatch-scheduler [disabled]
-mdump-tune-features [disabled]
-mf16c [enabled]
-mfancy-math-387 [enabled]
-mfentry [disabled]
-mfma [enabled]
-mfma4 [disabled]
-mforce-drap [disabled]
-mforce-indirect-call [disabled]
-mfp-ret-in-387 [enabled]
-mfpmath= sse
-mfsgsbase [enabled]
-mfunction-return= keep
-mfused-madd
-mfxsr [enabled]
-mgeneral-regs-only [disabled]
-mgfni [enabled]
-mglibc [enabled]
-mhard-float [enabled]
-mhle [enabled]
-miamcu [disabled]
-mieee-fp [enabled]
-mincoming-stack-boundary= 0
-mindirect-branch-register [disabled]
-mindirect-branch= keep
-minline-all-stringops [disabled]
-minline-stringops-dynamically [disabled]
-mintel-syntax
-mlarge-data-threshold=<number> 65536
-mlong-double-128 [disabled]
-mlong-double-64 [disabled]
-mlong-double-80 [enabled]
-mlwp [disabled]
-mlzcnt [enabled]
-mmemcpy-strategy=
-mmemset-strategy=
-mmitigate-rop [disabled]
-mmmx [enabled]
-mmovbe [enabled]
-mmovdir64b [disabled]
-mmovdiri [disabled]
-mmpx [disabled]
-mms-bitfields [disabled]
-mmusl [disabled]
-mmwaitx [disabled]
-mno-align-stringops [disabled]
-mno-default [disabled]
-mno-fancy-math-387 [disabled]
-mno-push-args [disabled]
-mno-red-zone [disabled]
-mno-sse4 [disabled]
-mnop-mcount [disabled]
-momit-leaf-frame-pointer [disabled]
-mpc32 [disabled]
-mpc64 [disabled]
-mpc80 [disabled]
-mpclmul [enabled]
-mpcommit [disabled]
-mpconfig [enabled]
-mpku [enabled]
-mpopcnt [enabled]
-mprefer-avx128
-mprefer-vector-width= 256
-mpreferred-stack-boundary= 0
-mprefetchwt1 [disabled]
-mprfchw [enabled]
-mpush-args [enabled]
-mrdpid [enabled]
-mrdrnd [enabled]
-mrdseed [enabled]
-mrecip [disabled]
-mrecip=
-mrecord-mcount [disabled]
-mred-zone [enabled]
-mregparm= 6
-mrtd [disabled]
-mrtm [disabled]
-msahf [enabled]
-msgx [enabled]
-msha [enabled]
-mshstk [disabled]
-mskip-rax-setup [disabled]
-msoft-float [disabled]
-msse [enabled]
-msse2 [enabled]
-msse2avx [disabled]
-msse3 [enabled]
-msse4 [enabled]
-msse4.1 [enabled]
-msse4.2 [enabled]
-msse4a [disabled]
-msse5
-msseregparm [disabled]
-mssse3 [enabled]
-mstack-arg-probe [disabled]
-mstack-protector-guard-offset=
-mstack-protector-guard-reg=
-mstack-protector-guard-symbol=
-mstack-protector-guard= tls
-mstackrealign [disabled]
-mstringop-strategy= [default]
-mstv [enabled]
-mtbm [disabled]
-mtls-dialect= gnu
-mtls-direct-seg-refs [enabled]
-mtune-ctrl=
-mtune= icelake-server
-muclibc [disabled]
-mvaes [enabled]
-mveclibabi= [default]
-mvect8-ret-in-mem [disabled]
-mvpclmulqdq [enabled]
-mvzeroupper [enabled]
-mwbnoinvd [enabled]
-mx32 [disabled]
-mxop [disabled]
-mxsave [enabled]
-mxsavec [enabled]
-mxsaveopt [enabled]
-mxsaves [enabled]
Known assembler dialects (for use with the -masm= option):
att intel
Known ABIs (for use with the -mabi= option):
ms sysv
Known code models (for use with the -mcmodel= option):
32 kernel large medium small
Valid arguments to -mfpmath=:
387 387+sse 387,sse both sse sse+387 sse,387
Known indirect branch choices (for use with the -mindirect-branch=/-mfunction-return= options):
keep thunk thunk-extern thunk-inline
Known data alignment choices (for use with the -malign-data= option):
abi cacheline compat
Known vectorization library ABIs (for use with the -mveclibabi= option):
acml svml
Known address mode (for use with the -maddress-mode= option):
long short
Known preferred register vector length (to use with the -mprefer-vector-width= option)
128 256 512 none
Known stack protector guard (for use with the -mstack-protector-guard= option):
global tls
Valid arguments to -mstringop-strategy=:
byte_loop libcall loop rep_4byte rep_8byte rep_byte unrolled_loop vector_loop
Known TLS dialects (for use with the -mtls-dialect= option):
gnu gnu2