 | | command framing as seen from kernel/program.lrkey_handler —Pat LaVarre
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| | | (...) Thanks for the tip, in reply here is a perhaps stunningly ignorant walkthru of how brickos frames standard commands, viewed by the newbie Me from kernel/program.lrkey_handler. The missing (key & -key) might interest people who haven't used (...) (22 years ago, 1-Feb-03, to lugnet.robotics.rcx.legos)
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| | | | | Re: command framing as seen from kernel/program.lrkey_handler —Mark Riley
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| | | | (...) (URL) The missing (key & -key) might interest people who haven't used log2 & - to (...) number (...) and (...) log2(key (...) If I'm interpreting your shorthand correctly: there's no fast way to execute log2() on the H8 (i.e. no O(1) (...) (22 years ago, 1-Feb-03, to lugnet.robotics.rcx.legos)
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| | | | | | Re: command framing as seen from kernel/program.lrkey_handler —Pat LaVarre
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| | | | (...) Mmmmm. I am curious, if that's ok. To get log2(xx) in O(1) time we could fetch (p[xx & -xx]) i.e. fetch our choice of the bytes at offset x 0 1 2 4 8 10 20 40 80 from some p we like. Merely standard C can't easily express that old idea without (...) (22 years ago, 1-Feb-03, to lugnet.robotics.rcx.legos)
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| | | | | | Re: command framing as seen from kernel/program.lrkey_handler —Mark Riley
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| | | | "Pat LaVarre" <ppaatt@aol.com> wrote in message news:H9n64q.B2p@lugnet.com... (...) I dunno, haven't found one yet, though. (...) choice (...) Touché. Yes, tables, overlooked that. (...) the (...) expensive (...) I think that smaller code size is (...) (22 years ago, 1-Feb-03, to lugnet.robotics.rcx.legos)
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| | | | | | Re: command framing as seen from kernel/program.lrkey_handler —Pat LaVarre
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| | | | (...) Just to be more certain we're understanding each other, if that's ok, I'll mention that ... 1) Newbie that I am, I have no clue how frequently brickos switches on bit masks. I wonder if only to decode xD2 RemoteCommand. 2) Using log2(xx & -xx) (...) (22 years ago, 2-Feb-03, to lugnet.robotics.rcx.legos)
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