Development Reference Guides

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mtune, tune

Performs optimizations for specific processors but does not cause extended instruction sets to be used (unlike -march).

Syntax

Linux:
-mtune
=
processor
Windows:
/tune
:
processor
Arguments
processor
Is the processor for which the compiler should perform optimizations. Possible values are:
generic
Optimizes code for the compiler's default behavior.
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
Optimizes code for processors that support the specified Intel® processor or microarchitecture code name.
Keywords
knl
and
silvermont
are only available on Windows and Linux systems.
Keyword
icelake
is deprecated and may be removed in a future release.
core-avx2
Optimizes 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
Optimizes 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
Optimizes code for processors that support Intel® Advanced Vector Extensions (Intel® AVX), Intel® SSE4.2, SSE4.1, SSE3, SSE2, SSE, and SSSE3 instructions.
corei7
Optimizes 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
Optimizes code for processors that support MOVBE instructions. May also generate code for SSSE3 instructions and Intel® SSE3, SSE2, and SSE instructions.
core2
Optimizes for the Intel® Core™2 processor family, including support for MMX™, Intel® SSE, SSE2, SSE3, and SSSE3 instruction sets.
pentium-mmx
Optimizes for Intel® Pentium® Processor with MMX technology.
pentiumpro
Optimizes for Intel® Pentium® Pro, Intel Pentium II, and Intel Pentium III processors.
pentium4m
Optimizes for Intel® Pentium® 4 processors with MMX technology.
pentium-m
pentium4
pentium3
pentium
Optimizes code for Intel® Pentium® processors. Value
pentium3
is only available on Linux systems.
Default
generic
Code is generated for the compiler's default behavior.
Description
This option performs optimizations for specific processors but does not cause extended instruction sets to be used (unlike
-march
).
The resulting executable is backwards compatible and generated code is optimized for specific processors. For example, code generated with
-mtune=core2
or
/tune:core2
runs correctly on 4th Generation Intel® Core™ processors, but it might not run as fast as if it had been generated using
-mtune=haswell
or
/tune:haswell
. Code generated with
-mtune=haswell
(
/tune:haswell
) or
-mtune=core-avx2
(
/tune:core-avx2
) will also run correctly on Intel® Core™2 processors, but it might not run as fast as if it had been generated using
-mtune=core2
or
/tune:core2
. This is in contrast to code generated with
-march=core-avx2
, which will not run correctly on older processors such as Intel® Core™2 processors.
This option only applies to host compilation. When offloading is enabled, it does not impact device-specific compilation.
Product and Performance Information
Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.
Notice revision #20201201
IDE Equivalent
Visual Studio:
Code Generation [Intel C++] >Intel Processor Microarchitecture-Specific Optimization
Eclipse:
Code Generation > Intel Processor Microarchitecture-Specific Optimization
Xcode:
Code Generation > Intel Processor Microarchitecture-Specific Optimization
Alternate Options
-mtune
Linux:
-mcpu
(this is a deprecated option)
Windows: None

Product and Performance Information

1

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