Developer Guide and Reference

Contents

march

Tells the compiler to generate code for processors that support certain features.

Syntax

Linux:
-march
=
processor
Windows:
None
Arguments
processor
Tells the compiler the code it can generate. Possible values are:
alderlake
amberlake
broadwell
cannonlake
cascadelake
coffeelake
cooperlake
goldmont
goldmont-plus
haswell
icelake-client
(or
icelake
)
icelake-server
ivybridge
kabylake
knl
knm
rocketlake
sandybridge
sapphirerapids
silvermont
skylake
skylake-avx512
tigerlake
tremont
whiskeylake
May generate instructions for processors that support the specified Intel® processor or microarchitecture code name.
Keywords
knl
and
silvermont
are only available on Linux* systems.
Keyword
icelake
is deprecated and may be removed in a future release.
core-avx2
Generates code for processors that support Intel® Advanced Vector Extensions 2 (Intel® AVX2), Intel® AVX, SSE4.2, SSE4.1, SSE3, SSE2, SSE, and SSSE3 instructions.
core-avx-i
Generates code for processors that support
Float-16 conversion instructions and
the RDRND instruction, Intel® Advanced Vector Extensions (Intel® AVX), Intel® SSE4.2, SSE4.1, SSE3, SSE2, SSE, and SSSE3 instructions.
corei7-avx
Generates code for processors that support Intel® Advanced Vector Extensions (Intel® AVX), Intel® SSE4.2, SSE4.1, SSE3, SSE2, SSE, and SSSE3 instructions.
corei7
Generates code for processors that support Intel® SSE4 Efficient Accelerated String and Text Processing instructions. May also generate code for Intel® SSE4 Vectorizing Compiler and Media Accelerator, Intel® SSE3, SSE2, SSE, and SSSE3 instructions.
atom
Generates code for processors that support MOVBE instructions. May also generate code for SSSE3 instructions and Intel® SSE3, SSE2, and SSE instructions.
core2
Generates code for the Intel® Core™2 processor family.
pentium4m
Generates for Intel® Pentium® 4 processors with MMX technology.
pentium-m
pentium4
pentium3
pentium
Generates code for Intel® Pentium® processors. Value
pentium3
is only available on Linux* systems.
Default
pentium4
If no architecture option is specified, value
pentium4
is used by the compiler to generate code.
Description
This option tells the compiler to generate code for processors that support certain features.
For compatibility, a number of historical
processor
values are also supported, but the generated code will not differ from the default.
Product and Performance Information
Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.
Notice revision #20201201
IDE Equivalent
None
Alternate Options
-march=pentium3
Linux:
-xSSE
Windows: None
-march=pentium4
-march=pentium-m
Linux:
-xSSE2
Windows: None
-march=core2
Linux:
-xSSSE3
Windows: None

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.