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Clarify that misaligned atomicity granule PMA applies to the compress… #1557

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Clarify that misaligned atomicity granule PMA applies to the compress… #1557

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Clarify that misaligned atomicity granule PMA applies to the compress…
romanheros Jul 24, 2024
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Merge branch 'main' into MAG16-compressed-insns
romanheros Sep 7, 2024
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11 changes: 6 additions & 5 deletions src/machine.adoc
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Expand Up @@ -2788,11 +2788,12 @@ MAG16 indicates the misaligned atomicity granule is at least 16 bytes.

The misaligned atomicity granule PMA applies only to AMOs, loads and stores
defined in the base ISAs, and loads and stores of no more than MXLEN bits
defined in the F, D, and Q extensions.
For an instruction in that set, if all accessed bytes lie within the same
misaligned atomicity granule, the instruction will not raise an exception for
reasons of address alignment, and the instruction will give rise to only one
memory operation for the purposes of RVWMO--i.e., it will execute atomically.
defined in the F, D, and Q extensions. It also applies to the compressed
encodings of them. For an instruction in that set, if all accessed bytes lie
within the same misaligned atomicity granule, the instruction will not raise
an exception for reasons of address alignment, and the instruction will give
rise to only one memory operation for the purposes of RVWMO--i.e., it will
execute atomically.

If a misaligned AMO accesses a region that does not specify a misaligned
atomicity granule PMA, or if not all accessed bytes lie within the same
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