Bug 561 - fail-first gather/scatter LD/ST means "strided"
Summary: fail-first gather/scatter LD/ST means "strided"
Status: CONFIRMED
Alias: None
Product: Libre-SOC's first SoC
Classification: Unclassified
Component: Source Code (show other bugs)
Version: unspecified
Hardware: PC Linux
: --- enhancement
Assignee: Luke Kenneth Casson Leighton
URL:
Depends on:
Blocks: 213
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Reported: 2020-12-30 19:02 GMT by Luke Kenneth Casson Leighton
Modified: 2020-12-30 19:46 GMT (History)
2 users (show)

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Description Luke Kenneth Casson Leighton 2020-12-30 19:02:42 GMT
security issue noted in RVV 0.9, with base-strided vectors.

we could instead use this to mean "element strided" mode.  hurrah.
Comment 1 Jacob Lifshay 2020-12-30 19:45:39 GMT
Note I meant specifically for gather-load and scatter-store, where the base register is marked as a vector and when mode is set to fail-on-first, we would instead interpret that as a strided load/store with a scalar base register, since otherwise we wouldn't have an encoding for that.