ARROW-9042: [C++] Add Subtract and Multiply arithmetic kernels with wrap-around behavior#7341

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kszucs wants to merge 23 commits intoapache:masterfrom

kszucs:add-kernel

Commits on Jun 8, 2020

safe add

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clang format

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remove flippedop

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deduce error

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add error as a comment

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left char behind

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fix tests and use ScalarBinary exec function to support multiple input shapes

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specialize Add operation explicitly for smaller integer types, please ubsan

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unchecked add, sub, mul

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format, remove comments

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fix op

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failing ubsan test for signed integer overflow

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avoid undefined signed integer overflow

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more overflow tests

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Apply suggestions from Ben

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renames

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make uint16 an exceptional case for multiplication

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fix arithmetics with scalar operands

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ubsan

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compare as string workaround until we have AssertArraysAlmostEqual

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scalar - scalar tests

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cleanup tests
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silence conversion warning error for MSVC
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