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https://issues.apache.org/jira/browse/ARROW-3701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16675008#comment-16675008
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Pindikura Ravindra edited comment on ARROW-3701 at 11/5/18 11:42 AM:
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> CPUs generally don't have 128 bit integer support. So any code written using
> a "int128" -
> which is non-standard - will get translated into 64-bit instructions at the
> CPU level.
I'm assuming the compilers are more efficient at this, but I may be wrong.
[https://github.com/rust-lang/rfcs/blob/master/text/1504-int128.md#alternatives]
With my initial testing for adding decimals - the perf with adding i128 is
very good (almost same as adding three longs). I haven't tried doing the same
with the current Decimal128 - let me give it a try.
was (Author: pravindra):
> CPUs generally don't have 128 bit integer support. So any code written using
> a "int128" - which is non-standard - will get > translated into 64-bit
> instructions at the CPU level.
I'm assuming the compilers are more efficient at this, but I may be wrong.
[https://github.com/rust-lang/rfcs/blob/master/text/1504-int128.md#alternatives]
With my initial testing for adding decimals - the perf with adding i128 is
very good (almost same as adding three longs). I haven't tried doing the same
with the current Decimal128 - let me give it a try.
> [Gandiva] Add support for decimal operations
> --------------------------------------------
>
> Key: ARROW-3701
> URL: https://issues.apache.org/jira/browse/ARROW-3701
> Project: Apache Arrow
> Issue Type: Task
> Components: Gandiva
> Reporter: Pindikura Ravindra
> Assignee: Pindikura Ravindra
> Priority: Major
>
> To begin with, will add support for 128-bit decimals. There are two parts :
> # llvm_generator needs to understand decimal types (value, precision, scale)
> # code decimal operations : add/subtract/multiply/divide/mod/..
> ** This will be c++ code that can be pre-compiled to emit IR code
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