mirror of
https://github.com/simdjson/simdjson
synced 2026-06-08 17:27:07 +00:00
Daniel Lemire
168 lines
6.2 KiB
C
168 lines
6.2 KiB
C
#ifndef SIMDJSON_IMPLEMENTATION_DETECTION_H
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#define SIMDJSON_IMPLEMENTATION_DETECTION_H
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#include "simdjson/base.h"
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// 0 is reserved, because undefined SIMDJSON_IMPLEMENTATION equals 0 in preprocessor macros.
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#define SIMDJSON_IMPLEMENTATION_ID_arm64 1
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#define SIMDJSON_IMPLEMENTATION_ID_fallback 2
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#define SIMDJSON_IMPLEMENTATION_ID_haswell 3
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#define SIMDJSON_IMPLEMENTATION_ID_icelake 4
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#define SIMDJSON_IMPLEMENTATION_ID_ppc64 5
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#define SIMDJSON_IMPLEMENTATION_ID_westmere 6
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#define SIMDJSON_IMPLEMENTATION_ID_lsx 7
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#define SIMDJSON_IMPLEMENTATION_ID_lasx 8
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#define SIMDJSON_IMPLEMENTATION_ID_FOR(IMPL) SIMDJSON_CAT(SIMDJSON_IMPLEMENTATION_ID_, IMPL)
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#define SIMDJSON_IMPLEMENTATION_ID SIMDJSON_IMPLEMENTATION_ID_FOR(SIMDJSON_IMPLEMENTATION)
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#define SIMDJSON_IMPLEMENTATION_IS(IMPL) SIMDJSON_IMPLEMENTATION_ID == SIMDJSON_IMPLEMENTATION_ID_FOR(IMPL)
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//
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// First, figure out which implementations can be run. Doing it here makes it so we don't have to worry about the order
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// in which we include them.
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//
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#ifndef SIMDJSON_IMPLEMENTATION_ARM64
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#define SIMDJSON_IMPLEMENTATION_ARM64 (SIMDJSON_IS_ARM64)
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#endif
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#if SIMDJSON_IMPLEMENTATION_ARM64 && SIMDJSON_IS_ARM64
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#define SIMDJSON_CAN_ALWAYS_RUN_ARM64 1
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#else
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#define SIMDJSON_CAN_ALWAYS_RUN_ARM64 0
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#endif
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// Default Icelake to on if this is x86-64. Even if we're not compiled for it, it could be selected
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// at runtime.
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#ifndef SIMDJSON_IMPLEMENTATION_ICELAKE
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#define SIMDJSON_IMPLEMENTATION_ICELAKE ((SIMDJSON_IS_X86_64) && (SIMDJSON_AVX512_ALLOWED) && (SIMDJSON_COMPILER_SUPPORTS_VBMI2))
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#endif
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#ifdef _MSC_VER
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// To see why (__BMI__) && (__PCLMUL__) && (__LZCNT__) are not part of this next line, see
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// https://github.com/simdjson/simdjson/issues/1247
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#if ((SIMDJSON_IMPLEMENTATION_ICELAKE) && (__AVX2__) && (__AVX512F__) && (__AVX512DQ__) && (__AVX512CD__) && (__AVX512BW__) && (__AVX512VL__) && (__AVX512VBMI2__))
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#define SIMDJSON_CAN_ALWAYS_RUN_ICELAKE 1
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#else
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#define SIMDJSON_CAN_ALWAYS_RUN_ICELAKE 0
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#endif
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#else
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#if ((SIMDJSON_IMPLEMENTATION_ICELAKE) && (__AVX2__) && (__BMI__) && (__PCLMUL__) && (__LZCNT__) && (__AVX512F__) && (__AVX512DQ__) && (__AVX512CD__) && (__AVX512BW__) && (__AVX512VL__) && (__AVX512VBMI2__))
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#define SIMDJSON_CAN_ALWAYS_RUN_ICELAKE 1
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#else
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#define SIMDJSON_CAN_ALWAYS_RUN_ICELAKE 0
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#endif
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#endif
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// Default Haswell to on if this is x86-64. Even if we're not compiled for it, it could be selected
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// at runtime.
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#ifndef SIMDJSON_IMPLEMENTATION_HASWELL
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#if SIMDJSON_CAN_ALWAYS_RUN_ICELAKE
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// if icelake is always available, never enable haswell.
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#define SIMDJSON_IMPLEMENTATION_HASWELL 0
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#else
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#define SIMDJSON_IMPLEMENTATION_HASWELL SIMDJSON_IS_X86_64
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#endif
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#endif
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#ifdef _MSC_VER
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// To see why (__BMI__) && (__PCLMUL__) && (__LZCNT__) are not part of this next line, see
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// https://github.com/simdjson/simdjson/issues/1247
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#if ((SIMDJSON_IMPLEMENTATION_HASWELL) && (SIMDJSON_IS_X86_64) && (__AVX2__))
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#define SIMDJSON_CAN_ALWAYS_RUN_HASWELL 1
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#else
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#define SIMDJSON_CAN_ALWAYS_RUN_HASWELL 0
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#endif
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#else
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#if ((SIMDJSON_IMPLEMENTATION_HASWELL) && (SIMDJSON_IS_X86_64) && (__AVX2__) && (__BMI__) && (__PCLMUL__) && (__LZCNT__))
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#define SIMDJSON_CAN_ALWAYS_RUN_HASWELL 1
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#else
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#define SIMDJSON_CAN_ALWAYS_RUN_HASWELL 0
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#endif
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#endif
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// Default Westmere to on if this is x86-64.
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#ifndef SIMDJSON_IMPLEMENTATION_WESTMERE
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#if SIMDJSON_CAN_ALWAYS_RUN_ICELAKE || SIMDJSON_CAN_ALWAYS_RUN_HASWELL
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// if icelake or haswell are always available, never enable westmere.
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#define SIMDJSON_IMPLEMENTATION_WESTMERE 0
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#else
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#define SIMDJSON_IMPLEMENTATION_WESTMERE SIMDJSON_IS_X86_64
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#endif
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#endif
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#if (SIMDJSON_IMPLEMENTATION_WESTMERE && SIMDJSON_IS_X86_64 && __SSE4_2__ && __PCLMUL__)
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#define SIMDJSON_CAN_ALWAYS_RUN_WESTMERE 1
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#else
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#define SIMDJSON_CAN_ALWAYS_RUN_WESTMERE 0
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#endif
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#ifndef SIMDJSON_IMPLEMENTATION_PPC64
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#define SIMDJSON_IMPLEMENTATION_PPC64 (SIMDJSON_IS_PPC64 && SIMDJSON_IS_PPC64_VMX)
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#endif
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#if SIMDJSON_IMPLEMENTATION_PPC64 && SIMDJSON_IS_PPC64 && SIMDJSON_IS_PPC64_VMX
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#define SIMDJSON_CAN_ALWAYS_RUN_PPC64 1
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#else
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#define SIMDJSON_CAN_ALWAYS_RUN_PPC64 0
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#endif
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#ifndef SIMDJSON_IMPLEMENTATION_LASX
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#define SIMDJSON_IMPLEMENTATION_LASX (SIMDJSON_IS_LOONGARCH64 && __loongarch_asx)
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#endif
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#define SIMDJSON_CAN_ALWAYS_RUN_LASX (SIMDJSON_IMPLEMENTATION_LASX)
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#ifndef SIMDJSON_IMPLEMENTATION_LSX
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#if SIMDJSON_CAN_ALWAYS_RUN_LASX
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#define SIMDJSON_IMPLEMENTATION_LSX 0
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#else
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#define SIMDJSON_IMPLEMENTATION_LSX (SIMDJSON_IS_LOONGARCH64 && __loongarch_sx)
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#endif
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#endif
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#define SIMDJSON_CAN_ALWAYS_RUN_LSX (SIMDJSON_IMPLEMENTATION_LSX)
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// Default Fallback to on unless a builtin implementation has already been selected.
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#ifndef SIMDJSON_IMPLEMENTATION_FALLBACK
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#if SIMDJSON_CAN_ALWAYS_RUN_ARM64 || SIMDJSON_CAN_ALWAYS_RUN_ICELAKE || SIMDJSON_CAN_ALWAYS_RUN_HASWELL || SIMDJSON_CAN_ALWAYS_RUN_WESTMERE || SIMDJSON_CAN_ALWAYS_RUN_PPC64 || SIMDJSON_CAN_ALWAYS_RUN_LSX || SIMDJSON_CAN_ALWAYS_RUN_LASX
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// if anything at all except fallback can always run, then disable fallback.
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#define SIMDJSON_IMPLEMENTATION_FALLBACK 0
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#else
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#define SIMDJSON_IMPLEMENTATION_FALLBACK 1
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#endif
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#endif
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#define SIMDJSON_CAN_ALWAYS_RUN_FALLBACK SIMDJSON_IMPLEMENTATION_FALLBACK
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// Determine the best builtin implementation
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#ifndef SIMDJSON_BUILTIN_IMPLEMENTATION
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#if SIMDJSON_CAN_ALWAYS_RUN_ICELAKE
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#define SIMDJSON_BUILTIN_IMPLEMENTATION icelake
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#elif 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_PPC64
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#define SIMDJSON_BUILTIN_IMPLEMENTATION ppc64
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#elif SIMDJSON_CAN_ALWAYS_RUN_LSX
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#define SIMDJSON_BUILTIN_IMPLEMENTATION lsx
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#elif SIMDJSON_CAN_ALWAYS_RUN_LASX
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#define SIMDJSON_BUILTIN_IMPLEMENTATION lasx
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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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#define SIMDJSON_BUILTIN_IMPLEMENTATION_ID SIMDJSON_IMPLEMENTATION_ID_FOR(SIMDJSON_BUILTIN_IMPLEMENTATION)
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#define SIMDJSON_BUILTIN_IMPLEMENTATION_IS(IMPL) SIMDJSON_BUILTIN_IMPLEMENTATION_ID == SIMDJSON_IMPLEMENTATION_ID_FOR(IMPL)
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#endif // SIMDJSON_IMPLEMENTATION_DETECTION_H
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