On Mon, Mar 29, 2010 at 8:49 PM, Xavier Leroy wrote:
>>> This is a call for testers concerning an experimental OCaml compiler
>>> back-end that uses SSE2 instructions for floating-point arithmetic.[...]
>>
>> I cannot provide any benchmark yet
>
> Too bad :-( I got very little feedback to my call
Hello Dmitry,
>> This is a call for testers concerning an experimental OCaml compiler
>> back-end that uses SSE2 instructions for floating-point arithmetic.[...]
>
> I cannot provide any benchmark yet
Too bad :-( I got very little feedback to my call: just one data point
(thanks Gaetan). Perhap
On Tue, Mar 23, 2010 at 12:07 PM, Daniel Bünzli
wrote:
>> let round x = truncate (x +. 0.5)
>
> Side note, if you are also interested in negative numbers
Sure, it was just an code generation example. Probably I should use
round_positive name.
> that's not what you want. You want :
>
>> let round
> let round x = truncate (x +. 0.5)
Side note, if you are also interested in negative numbers that's not
what you want. You want :
> let round x = floor (x +. 0.5)
Best,
Daniel
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On Tue, Mar 9, 2010 at 7:33 PM, Xavier Leroy wrote:
> Hello list,
>
> This is a call for testers concerning an experimental OCaml compiler
> back-end that uses SSE2 instructions for floating-point arithmetic.
> This code generation strategy was discussed before on this list, and I
> include below
With my audio processing application of about 1300 LOC, i get a speedup of
about 9%. I run the application on Intel Pentium M under Kubuntu.
The application spend all the time doing computation on bigarray of float.
For me, the gain is appreciable. In real time audio processing, a speedup of
9%
Mike Lin wrote:
I have a bunch of biological sequence analysis stuff that could be
interesting but I am already in x86-64 ("Wow! A 64 bit architecture!").
The above seems pretty clear but just to verify - I would not benefit
from this new back-end, right?
Right. Sorry for not mentioning this
On Mar 10, 2010, at 1:25 PM, Mike Lin wrote:
> On Tue, Mar 9, 2010 at 11:33 AM, Xavier Leroy wrote:
> Note that x86-64 bits systems as well as Mac OS X already use SSE2 as
> their default floating-point model.
>
> I have a bunch of biological sequence analysis stuff that could be
> interesting
On Tue, Mar 9, 2010 at 11:33 AM, Xavier Leroy wrote:
> - The register-based SSE2 model fits the OCaml back-end much better
> than the stack-based x87 model. In particular, "let"-bound intermediate
> results of type "float" can be kept in SSE2 registers, while in
> the current x87 mode they ar
Hello list,
This is a call for testers concerning an experimental OCaml compiler
back-end that uses SSE2 instructions for floating-point arithmetic.
This code generation strategy was discussed before on this list, and I
include below a summary in Q&A style.
The new back-end is being considered f
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