[Libre-soc-bugs] [Bug 236] Atomics Standard writeup needed

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=236

--- Comment #21 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
these are the opencapi opcodes:

AMO read amo_rd       amo_rd.n
         ‘0011 1000’ ‘0011 1100’

AMO read write amo_rw       amo_rw.n
               ‘0100 0000’ ‘0100 0100’

they need to be joined by three more (each):

* AMO read aq
* AMO rdwr aq
* AMO read rl
* AMO rdwr rl
* AMO read aq rl
* AMO rdwr aq rl

which means finding out if there are two bits available
somewhere in the opencapi opcodes

*that have not been used by IBM for private OMI custom extensions*

which leaves us running into a Commercial Confidentiality brick wall.

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