A few notes on choosing between Go and D for a quick project
weaselcat via Digitalmars-d
digitalmars-d at puremagic.com
Sat Mar 21 21:21:05 PDT 2015
On Sunday, 22 March 2015 at 03:43:33 UTC, Walter Bright wrote:
> On 3/21/2015 2:08 PM, "Ola Fosheim =?UTF-8?B?R3LDuHN0YWQi?=
> <ola.fosheim.grostad+dlang at gmail.com>" wrote:
>> On Saturday, 21 March 2015 at 19:35:02 UTC, Walter Bright
>>> I know I shouldn't, but I'll bite. Show me the "low level C
>>> code" that
>>> effectively uses SIMD vector registers.
>> You are right, you should not bite. C code is superflous, this
>> is a general
>> issue with efficient parallel computations. You want to avoid
>> within a single register.
>> E.g. Take a recurrence relation and make an efficient simd
>> implementation for
>> it. You might need to try to expand the terms so you have N
>> formulas. If it uses floating point you will have to be
>> careful about drift
>> between the N formulas that are computed in parallel.
> I.e. there isn't low level C code that effectively uses SIMD
> vector registers. You have to use the auto-vectorizer, which
> tries to reconstruct high level operations out of C low level
> code, then recompile.
at least it still compiles into efficient code for the PDP11?
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