Re: Projects I may be willing to sponsor
- From: Stefano <phd.st.p@xxxxxxxxx>
- To: luajit@xxxxxxxxxxxxx
- Date: Wed, 10 Dec 2014 20:02:46 +0000
On 10 Dec 2014 19:58, "Joe Ellsworth" <joexdobs@xxxxxxxxx> wrote:
>
> Just what I wanted. I think it would be worth adding this to the FFI
section on the web site.
It's listed on the relevant LuaJIT wiki page:
http://wiki.luajit.org/FFI-Native-Libraries
You might find other libraries useful to your work on that page as well.
Stefano
>
>
> On 12/10/2014 11:50 AM, Stefano wrote:
>>
>>
>> On 10 Dec 2014 18:39, "Szabó Antal" <szabo.antal.92@xxxxxxxxx> wrote:
>> >
>> > 2014-12-10 19:15 GMT+01:00 Joseph Ellsworth <joexdobs@xxxxxxxxx>:
>> >>
>> >> The sample / example would allocate the array, Fill it with a set
of doubles read from a file, Run the sum and return both the sum and
average value.
>> >
>> >
>> > Here is a sample code for what I suppose you want:
http://pastebin.com/cj7jShfj
>> >
>> > The summation loop looks like this in x64 assembly (use -jdump with
luajit to get it):
>> >
>> > ->LOOP:
>> > 7ffc8350ff80 addsd xmm7, [rax+rdi*8+0x8]
>> > 7ffc8350ff86 add edi, +0x01
>> > 7ffc8350ff89 cmp edi, 0x270f
>> > 7ffc8350ff8f jle 0x7ffc8350ff80 ->LOOP
>> >
>> > As far as I can tell, this is the shortest and fastest you can get
without using vector instructions, which LuaJIT doesn't currently support.
>>
>> For something more end-user-friendly (for this project at least) than
bare FFI the author might be interested in my the algebra module of an open
source project I'm working on:
>>
>> http://scilua.org/sci_alg.html
>>
>> Stefano
>>
>> >
>> >
>> > Antal Szabó
>
>
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