Re: Projects I may be willing to sponsor
- From: Szabó Antal <szabo.antal.92@xxxxxxxxx>
- To: luajit@xxxxxxxxxxxxx
- Date: Wed, 10 Dec 2014 19:38:29 +0100
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.
Antal Szabó
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