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Questions tagged [adx]

ADX is the name of Intel's arbitrary-precision arithmetic instruction set for the x86 architecture. Questions about azure data explorer should NOT use this tag; the [azure-data-explorer] tag should be used instead.

Intel ADX (Multi-Precision Add-Carry Instruction Extensions) is Intel's arbitrary-precision arithmetic extension to the x86 instruction set architecture (ISA). Intel ADX was first supported in the Broadwell micro-architecture

The instruction set extension contains just two new instructions, though MULX from BMI2 is also considered as a part of the large integer arithmetic support

Both instructions are more efficient variants of the existing ADC instruction, with the difference that each of the two new instructions affects only one flag, where ADC as a signed addition may set both overflow and carry flags, and as an old-style x86 instruction also reset the rest of the CPU flags. Having two versions affecting different flags means that two chains of additions with carry can be calculated in parallel.

Source: Wikipedia (Intel ADX)

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What is the difference between the ADC and ADCX instructions on ia32/ia64?

I was looking through the Intel software developer manual when I encountered the ADCX instruction, which was previously unknown to me; its encoding is 66 0F 38 F6. It seems to be almost identical to the ADC instruction, so why would you use ADCX…
John Källén
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_addcarry_u64 and _addcarryx_u64 with MSVC and ICC

MSVC and ICC both support the intrinsics _addcarry_u64 and _addcarryx_u64. According to Intel's Intrinsic Guide and white paper these should map to adcx and adox respectively. However, by looking at the generated assembly it's clear they map to adc…
Z boson
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When to use ADOX instead of ADCX?

The only difference mentioned in the Intel instruction set reference is the usage of the overflow-flag instead of the carry-flag. When does one use ADOX instead of ADCX to perform an unsigned addition with a carry?
J-M. Gorius
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Why adox and adcx don't play well together on Ryzen?

I spent quite a lot of time hand-optimizing low-level integer arithmetic, with some success. For instance, my subroutine for 6x6 multiplication spends 66 ticks compared to 82 ticks of mpn_mul_basecase(6,6) on Skylake. My code is published on…
Денис Крыськов
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Kusto row_cumsum modifying the Term if Term reaches a point

I have a list of Employee names and Salaries in the following order I need to create the output table in the below format. ie, whenever the accumulated salary-total crosses 3000 I have to detect that and mark that row. I have tried to do…
Justin Mathew
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How query data use offset in kusto (Azure Data Explorer) KQL for paging

How can I realize below SQL query use offset for paging query in KQL. select * from testtable where code = '88580' limit 1000 offset 111 I can't find any function in KQL can like the offset in SQL
Tarhone
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Azure data explorer Batching policy modifications

I have huge amount of data flowing from Eventhub to Azure Data Explorer. Currently we have not done any modification on the batching policy, so it is scheduling every 5 minutes. But we need to reduce it to a less value so that the end to end lag is…
Justin Mathew
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Link entity causing exception, not sure why?

I have the below FetchXML link-entity, to execute on a Dynamics portal. However i'm getting the liquid error Liquid error: Exception has been thrown by the target of an invocation. any ideas why? How do I go about fixing this? I believe its this…
user12403387
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ADX request throttling improvements

I am getting {"code": "Too many requests", "message": "Request is denied due to throttling."} from ADX when I run some batch ADF pipelines. I have came across this document on workload group. I have a cluster where we did not configured work load…
Justin Mathew
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Azure Data Explorer Command dynamic parameter error

I have added "Azure Data Explorer Command" in ADF pipeline, but it is not accepting dynamic parameters inside command expression. ex: Step 1: added Azure Data Explorer Command Step 2: Added two parameters Step 3: Added dynamic expression in…
sam
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How to convert to dynamic type/ apply multiple functions on same 'pack' in KQL/Kusto

I am absolutely in love with ADX time series capabilities; having worked tons on sensor data with Python. Below are the requirements for my case: Handle Sensor data tags at different frequencies -- bring them to all to 1 sec frequency (if in…
pyeR_biz
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Test case for adcx and adox

I'm testing Intel ADX add with carry and add with overflow to pipeline adds on large integers. I'd like to see what expected code generation should look like. From _addcarry_u64 and _addcarryx_u64 with MSVC and ICC, I thought this would be a…
jww
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ADX project column with a new column containing white space

Is it possible to project a ADX column with a new column name that has whitespace? For instance, Covid19_map2 | project "My Area Info" = AreaInfo Here is the ADX sample cluster…
Born2Code
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How can I extract the list of value for a given property in an array JSON objects using regex?

I have the following JSON payload in a column in an ADX cluster that I need extract data from. [ { "RailType":"HE400", "InstallationDate":"2017-07-19T16:00:00.0000000Z", "CurvePercentage":99.61377338837824 }, { …
Henry
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Azure Data Explorer: How do Partitioning Policy and Merge Policy work?

In our ADX cluster there is no partitioning policy and no merge policy on a table, but the adx still creates extents. I am confused how this works and what the default settings are. Does anyone know this? Further, how do a combination of partition…
FakieKickflip
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