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Set by AlexDaniel on 12 June 2018.
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Geth MoarVM: Kaiepi++ created pull request #886:
Implement JIT templates for 10 ops (27/06/18) (WIP)
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Kaiepi does p6doc -f grep segfault for anyone else on the latest moar? 05:24
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Kaiepi nvm, worked out which commit was causing it 05:34
Geth MoarVM: Kaiepi++ created pull request #888:
Fix version detection
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brrt Kaiepi: reviewed your fixes. thanks for adding them, they need minor work 06:22
Kaiepi aight 06:25
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jnthn brrt++ 09:10
Will merge that later today; got some other stuff to take care of first
brrt awesome 09:33
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brrt Kaiepi: there's a bunch of bugs I spotted in your PR 16:52
I hope my description of them is clear
Kaiepi it is 16:55
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samcv brrt: does expr jit have bitshifft ops? 17:49
i wanted to jit abs_i but i'm not sure how because of that
Geth MoarVM: 4dcea89158 | (Samantha McVey)++ | src/jit/core_templates.expr
Add expr jit template for rand_i
samcv also curious if it lets me have a temporary integer variable since that needs it
brrt doesn't have it yet, i think. want to know how to add them? ;-) 17:51
samcv yes!
Geth MoarVM: e3f60b6502 | (Samantha McVey)++ | src/core/interp.c
Make the abs_i op more readable in interp.c

Since one of the created variables relies on the other, it's confusing when they are both declared on the same line (with the comma).
Put them on two lines so it's easier to read.
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brrt okay, so, three step process. let me get the right things in place 18:03
first, open src/jit/expr_ops.h
there's a macro-defined list in there. the details aren't all that important now, it's a cute trick I picked up from LuaJIT 18:04
you'll see a bunch of statements like '_(AND, 2, 0, REG, UNSIGNED),'
there, you'll need to add some name, like 'SHIFTLEFT' or 'SHIFT_RIGHT', or something that makes sense to you 18:05
timotimo shrixtyfour 18:06
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travis-ci MoarVM build passed. Samantha McVey 'Add expr jit template for rand_i' 18:07
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brrt ಠ_ಠ 18:10
timotimo you know, shift right, integer, sixtyfour bits 18:11
samcv shrixtyfour :P haha 18:12
brrt that is so java :-P
timotimo oh, you mean like ShiftRightIntegerFactory::forSixtyFourBits?
samcv woah there 18:13
brrt no, ishiftr_1
samcv: where?
timotimo iShiftr 2.0 Beta
sounds very hipster webservicy
brrt shift-right.js 18:14
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timotimo docker pull rightshift:latest 18:14
samcv ishftr.js/10/5 will shift 10 right by 5
it will be a very important server. though probably we can do it with JSOn request instead
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samcv and call out to that url when doing the expr jit op 18:15
brrt ishfrt.js/v2/10/5.json
timotimo we already have messagepack bundled with moarvm 18:16
that format is much more efficient
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travis-ci MoarVM build passed. Samantha McVey 'Make the abs_i op more readable in interp.c 18:16
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brrt It is somewhat more efficient, but when I measured (admittedly years ago) the difference was not quite shocking 18:17
Sereal is pretty good
samcv: first item is name, second item is number of arguments, third item is number of parameters, fourth item is the 'type' of the result, first item is what-to-do-with-size-difference flag 18:18
samcv ok 18:20
brrt for a left shift operator, that'd be something like _(SHL, 2, 0, REG, UNSIGNED) 18:24
samcv brrt: basically i'm adding abs_i. i need a temp variable. how do i do that 18:44
timotimo with let?
brrt uh, lemme see
samcv ok well i fixed my gradle issue. it wasn't gradle but the file too long error was because some commands in my shell function were printing to stdout which made it be the return value of the function 18:45
brrt hehe
yes, let will work in this case (abs_i) 18:46
samcv idk maybe easier to multiply it by -1 if the number is negative
than doing all this work :P
not as efficient though
brrt not sure if i've implemented multiply already 18:47
samcv heh
what about negation of an integer?
brrt hmm. not sure about that either 18:49
funnily enough, not really a common operation
easy enough to do
anyway, once i'm done with the guide, you'll be able to add them in no time
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Geth MoarVM: 411f73fdce | (Bart Wiegmans)++ | docs/jit/
[Docs] Add JIT documentation describing how to add a tile

Per samcv++'s request, this is how you add a new tile.
brrt i hope that's enough to help you on your way 19:14
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samcv thanks :) 19:22
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lizmat I wonder if jnthn could give a good explanation of MoarVM's JIT to 21:45
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jnthn lizmat: Not sure what I could really add there, or if it's even on topic. "A similar issue occurs in any dynamic language (JavaScript, Lua, Perl, etc) that uses generic dictionaries for assigning and loading functions." But Perl 6 doesn't have that situation; it's design carefully sticks methods in a different place than the package Stash, so they're not stored in our generic Hash data structure. 22:43
yoleaux 14:59Z <lizmat> jnthn: could you please have a look at GH #1959
jnthn R #1959 22:44
synopsebot R#1959 [open]: Empty set()/bag()/mix() do not return a unique object
jnthn oh, that was asked a while ago, and I commented on it since then :)
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