Reducing the cost of autodecoding

[Stefan Koch via Digitalmars-d]

On Thursday, 13 October 2016 at 01:27:35 UTC, Andrei Alexandrescu 
wrote:
> On 10/12/2016 08:41 PM, safety0ff wrote:
>> On Thursday, 13 October 2016 at 00:32:36 UTC, safety0ff wrote:
>>>
>>> It made little difference: LDC compiled into AVX2 vectorized 
>>> addition
>>> (vpmovzxbq & vpaddq.)
>>
>> Measurements without -mcpu=native:
>> overhead 0.336s
>> bytes    0.610s
>> without branch hints 0.852s
>> code pasted 0.766s
>
> So we should be able to reduce overhead by means of proper code 
> arrangement and interplay of inlining and outlining. The prize, 
> however, would be to get the AVX instructions for ASCII going. 
> Is that possible? -- Andrei

AVX for ascii ?
What are you referring to ?
Most text processing is terribly incompatible with simd.
sse 4.2 has a few instructions that do help, but as far as I am 
aware it is not yet too far spread.