mirror of
https://github.com/simdjson/simdjson
synced 2026-06-08 17:27:07 +00:00
Daniel Lemire
07a6e098c8
* This would allow users to find out what builtin is. * Trying another approach. * Added instructions. * Cleaning up the printout. * Let us be less invasive. * Adding a comment.
42 lines
1.8 KiB
C++
42 lines
1.8 KiB
C++
#ifndef SIMDJSON_BUILTIN_H
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#define SIMDJSON_BUILTIN_H
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#include "simdjson/portability.h"
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#ifndef SIMDJSON_BUILTIN_IMPLEMENTATION
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#if SIMDJSON_CAN_ALWAYS_RUN_HASWELL
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#define SIMDJSON_BUILTIN_IMPLEMENTATION haswell
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#elif SIMDJSON_CAN_ALWAYS_RUN_WESTMERE
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#define SIMDJSON_BUILTIN_IMPLEMENTATION westmere
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#elif SIMDJSON_CAN_ALWAYS_RUN_ARM64
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#define SIMDJSON_BUILTIN_IMPLEMENTATION arm64
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#elif SIMDJSON_CAN_ALWAYS_RUN_FALLBACK
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#define SIMDJSON_BUILTIN_IMPLEMENTATION fallback
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#else
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#error "All possible implementations (including fallback) have been disabled! simdjson will not run."
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#endif
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#endif // SIMDJSON_BUILTIN_IMPLEMENTATION
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namespace simdjson {
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/**
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* Represents the best statically linked simdjson implementation that can be used by the compiling
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* program.
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*
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* Detects what options the program is compiled against, and picks the minimum implementation that
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* will work on any computer that can run the program. For example, if you compile with g++
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* -march=westmere, it will pick the westmere implementation. The haswell implementation will
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* still be available, and can be selected at runtime, but the builtin implementation (and any
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* code that uses it) will use westmere.
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*/
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namespace builtin = SIMDJSON_BUILTIN_IMPLEMENTATION;
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/**
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* Function which returns a pointer to an implementation matching the "builtin" implementation.
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* The builtin implementation is the best statically linked simdjson implementation that can be used by the compiling
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* program. If you compile with g++ -march=haswell, this will return the haswell implementation.
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* It is handy to be able to check what builtin was used: builtin_implementation()->name().
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*/
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const implementation * builtin_implementation();
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} // namespace simdjson
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#endif // SIMDJSON_BUILTIN_H
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