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- gcc: Differences between -march=native and -march= lt;specific arch gt;
As I understand it, -march=native will detect the ISA and extensions to use from cpuid (which include model, family and stepping information) -march=xxx will use a baseline set of extensions and a baseline ISA There are a lot of possible combinations of extensions, so only the most relevant were chosen (e g skylake-avx512 was added to reflect an important extension of some skylakes) -march
- Why is -march=native not enabled by default by compilers IDEs?
For -O0, whether -march=native or -march=<generic> is the default still specifies the same family, so both are perfectly compatibly with -O0; and whenever another optimization level is specified, -march=native is beneficial to performance So, for me, the fact that -O0 is the default doesn't matter for -march 's default
- gcc - How is -march different from -mtune? - Stack Overflow
-march=foo implies -mtune=foo unless you also specify a different -mtune This is one reason why using -march is better than just enabling options like -mavx without doing anything about tuning Caveat: -march=native on a CPU that GCC doesn't specifically recognize will still enable new instruction sets that GCC can detect, but will leave -mtune=generic Use a new enough GCC that knows about
- How to specify -march=native using pragmas (or otherwise) in gcc
How to specify -march=native using pragmas (or otherwise) in gcc Ask Question Asked 8 years, 6 months ago Modified 6 years, 1 month ago
- c++ - What exactly does -march=native do? - Stack Overflow
Gentoo Wiki told me the following: Warning: GCC 4 2 and above support -march=native -march=native applies additional settings beyond -march, specific to your CPU Unless you have a specific reaso
- -march=haswell vs -march=core-avx2 vs -mavx2 - Stack Overflow
What are the differences and tradeoffs between -march=haswell, -march=core-avx2, and -mavx2 for compiling avx2 intrinsics? I know that -mavx2 is a flag and -march=haswell core-avx2 are architectures which just translate to a bunch of flags So -mavx2 is a subset of the other two But beyond that, how do I choose the right one for my application?
- date - Problems with Excel handling of the month of March in German . . .
For work I have to use an Excel version in German Excel handles the month of March (März) in a strange wrong way The standard German abbreviation in the month's list is MRZ (if I fill a series of
- gcc - GNU Arm warning:-mcpu=cortex-r5 conflicts with -march=armv7-r . . .
Using -march will also allow you more possibilities to use 3rd party closed source as well You should be able to link -mcpu=cortex-r5 with -march=armv7-r code; well it is fine in one directions, so the tools may complain
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