Very simple SIMD programming

[Iain Buclaw]

On 25 October 2012 00:16, Manu <turkeyman at gmail.com> wrote:
> On 25 October 2012 02:01, Iain Buclaw <ibuclaw at ubuntu.com> wrote:
>>
>> On 24 October 2012 23:46, Manu <turkeyman at gmail.com> wrote:
>>
>> > Let's consider your example above for instance, I would rewrite (given
>> > existing syntax):
>> >
>> > // vector length of context = 1; current_mask = T
>> > int4 v = [0,3,4,1];
>> > int4 w = 3; // [3,3,3,3] via broadcast
>> > uint4 m = maskLess(v, w); // [T,F,F,T] (T == ones, F == zeroes)
>> > v += int4(1); // [1,4,5,2]
>> >
>> > // the if block is trivially rewritten:
>> > int4 trueSide = v + int4(2);
>> > int4 falseSize = v + int4(3);
>> > v = select(m, trueSide, falseSide); // [3,7,8,4]
>> >
>> >
>>
>> This should work....
>>
>> int4 trueSide = v + 2;
>> int4 falseSide = v + 3;
>
>
> Probably, just wasn't sure.

The idea with vectors is that they support the same operations that D
array operations support. :-)


-- 
Iain Buclaw

*(p < e ? p++ : p) = (c & 0x0f) + '0';