GH-47572: [C++][Parquet] Uniform unpack interface#47573

Merged

pitrou merged 76 commits into

apache:mainfrom

AntoinePrv:bit-packing

Oct 16, 2025

Commits on Oct 16, 2025

Add large bit_width unpack64 tests

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Handle 16bit unpacking generation

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Use uint8_t* input for simd unpack

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Gen: regenerate bpacking_simd

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Exclude Python codegen from doxygen

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Make generic scalar unpacking codegen

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Gen: regenerate scalar unpack function in single file

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Simplify scalar_unpack increments

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Gen: regenerate bpacking_scalar

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Try: reinterpret cast

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Revert: reinterpret cast

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Simplify simd generator code

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Gen: regenerate simd files

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Use templated method in SimdUnpacker

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Gen: regenerate simd files

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Slight improvement to SIMD codegen

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Use template functions in scalar codegen and factor dispatch

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Gen: regenerate unpack files

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Try new simd scheme

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Fix template specialization

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Gen: regenerate unpack files

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Only generate simd 32

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Gen: regenerate unpack files

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Add SSE4.2 instantiation to bpacking

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Try: new simd scheme

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WIP: new simd algo

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WIP

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Struct unpacker for width and no generate null/full

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Gen: regenerate unpack files

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WIP simd unpack

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Generate scalar 16 bit unpacking

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Move scalar unpack functions to their own file

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Gen: regenerate unpack files

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Test all width

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Add sse2 file

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Simplify bpacking files

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Add simd 16 unpack functions

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Gen: regenerate unpack files

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Remove unpack16_avx512

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Gen: regenerate avx512 file

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Add missing header

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Add simd 64

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Gen: regenerate simd files

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Missing 64 impl

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BENCHMARK ALL

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Adjust used unpack functions

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use constexpr jump table

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Reduce number of displayed tests

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Fix array CTAD

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Revert "BENCHMARK ALL"

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Fix missing header guard

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Use template for public unpack functions

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Fix template instanciation declaration

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Use template for internal unpack functions

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Fix UB

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Use unpack<uint16_t> in BitReader

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Gen: regenerate files

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Generate unpack16 function calling unpack32

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Use unpack16 simd functions

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Add unpack_avx512<uint16_t>

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Add unpack8

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Gen: regenerate files

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Use unpack functions universally

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Remove unpack on SSE4.2

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Avoid namespace conflict

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Try manual jump table

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Update gitattribute

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Address review comments

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Add anonymous namespace

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Add unpack<bool>

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Rename test

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Rename simd_min > simd_default

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Address reviewer comments

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Size of bool may not be one

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Add half width comment

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Refine comment
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