instr_macros.rst

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Instruction set macros

Each of these macros corresponds to an instruction set supported by XSIMD. They can be used to filter arch-specific code.

xsimd_config_macro

Changing Default architecture

You can change the default instruction set used by xsimd (when none is provided explicitely) by setting the XSIMD_DEFAULT_ARCH macro to, say, xsimd::avx2. A common usage is to set it to xsimd::unsupported as a way to detect instantiation of batches with the default architecture.