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Tweak cincaddr so that it can replace cmove instruction #88

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rmn30 opened this issue Nov 29, 2024 · 1 comment
Open

Tweak cincaddr so that it can replace cmove instruction #88

rmn30 opened this issue Nov 29, 2024 · 1 comment
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maybe-v2 Tracking issues for possible changes for an ISAv2

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@rmn30
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rmn30 commented Nov 29, 2024

The proposed CHERI-RISCV standard replaces cmove cd, cs1 instruction with a special case for cincaddr cd, cs1, zr that prevents it from clearing the tag on sealed capabilities. We should align with the standard on this.
@davidchisnall
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I don't really want to do with for v1. We can easily provide a cmove pseudo / macro that expands to cincaddr in v2.

@nwf nwf added the maybe-v2 Tracking issues for possible changes for an ISAv2 label Nov 29, 2024
@davidchisnall davidchisnall moved this from Todo to Rejected in ISA Version 1.0 release Dec 3, 2024
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maybe-v2 Tracking issues for possible changes for an ISAv2
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ISA Version 1.0 release
Status: Rejected
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@nwf @davidchisnall @rmn30