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- To: eigen@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [eigen] sse transcendental functions
- From: Gael Guennebaud <gael.guennebaud@xxxxxxxxx>
- Date: Wed, 25 Mar 2009 18:07:20 +0100
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ok, so this actually corresponds to the SIMD lib by Sony, and their
SSE sinf4 is indeed slightly faster (200M calls versus 177M) but it is
only valid in the range [-pi/4 : pi/4] so it is quite useless for us.
Note that both implementations are based on exactly the same principle
and the speed difference is 100% explained by the handling of a much
wider range of values
gael.
On Wed, Mar 25, 2009 at 5:36 PM, Rohit Garg <rpg.314@xxxxxxxxx> wrote:
> I'll dig them up
>
>
> On Wed, Mar 25, 2009 at 10:06 PM, Gael Guennebaud
> <gael.guennebaud@xxxxxxxxx> wrote:
>> where are they ? I can only find btsin and btCos which simply call the
>> standard C functions....
>>
>> On Wed, Mar 25, 2009 at 3:35 PM, Rohit Garg <rpg.314@xxxxxxxxx> wrote:
>>> please consider benching these against the sin, cos, acos, sincos
>>> implementations in bullet physics sdk. It is bsd licensed and may be
>>> faster.
>>>
>>> --
>>> Rohit Garg
>>>
>>> http://rpg-314.blogspot.com/
>>>
>>> Senior Undergraduate
>>> Department of Physics
>>> Indian Institute of Technology
>>> Bombay
>>>
>>>
>>>
>>
>>
>>
>
>
>
> --
> Rohit Garg
>
> http://rpg-314.blogspot.com/
>
> Senior Undergraduate
> Department of Physics
> Indian Institute of Technology
> Bombay
>
>
>