Bug 809 - modify svp64 to re-enable using OV as a second carry flag for sv.addex
Summary: modify svp64 to re-enable using OV as a second carry flag for sv.addex
Alias: None
Product: Libre-SOC's second ASIC
Classification: Unclassified
Component: source code (show other bugs)
Version: unspecified
Hardware: Other Linux
: --- enhancement
Assignee: Jacob Lifshay
Depends on:
Blocks: 776
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Reported: 2022-04-12 16:42 BST by Jacob Lifshay
Modified: 2023-09-08 06:21 BST (History)
3 users (show)

See Also:
NLnet milestone: NLnet.2021.02A.052.CryptoRouter
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Comment 1 Jacob Lifshay 2023-09-08 01:57:24 BST
marking as blocking bug #776 since this is part of
NLnet.2021.02A.052.CryptoRouter and that seemed like
an appropriate bug so this doesn't get lost.
budget TBD.
Comment 2 Luke Kenneth Casson Leighton 2023-09-08 06:21:16 BST
this was when i was looking at Intel's mulx instruction app note from 2012.
the alternative idea i had was to create an "add-using-cr-fields" instruction
which would create overflow in a CR field but also use CRfs as carry-in and
carry-out.  TBdiscussed