Re: M_PIl

2012-09-01 Thread Pierre Abbat 
On Friday, August 31, 2012 18:33:36 Jelle Hermsen wrote:
> Personally I just define pi with 4*atan(1). Is there a good reason to use
> M_PI1 instead?

I defined M_PIl as (4*atan(1.)) and ran the program. It gave the same result as 
defining M_PIl as M_PI. The reason for using M_PIl is that it's a ten-byte 
float, so multiplying by it will result in better accuracy than multiplying by 
M_PI, which is an eight-byte float.

I once wrote a Mandelbrot/Julia program that gave wrong results; it was 
continuing the iteration instead of stopping when it saw a previously seen 
value. I submitted a bug to the GCC authors. It turned out to be not a bug in 
the compiler. The program was comparing a just-computed point, expressed as a 
ten-byte float in the processor, with a previously computed point, expressed as 
an eight-byte float in a double variable, and they were not equal.

Pierre
-- 
The Black Garden on the Mountain is not on the Black Mountain.

Re: What's the status of the USB stack port?

2012-09-01 Thread elekktretterr 
One more thing,

Can you give me some instructions on compiling a kernel with the new usb
stack?

Petr

Re: What's the status of the USB stack port?

2012-09-01 Thread elekktretterr 
> On Sat, 01 Sep 2012 11:44:47 +0200,  wrote:
>
>> Hi all,
>>
>> Last time I heard there was someone working on the port. I'd be willing
>> to
>> test (my dragonfly installation is long not used because my USB
>> peripherals - keyboard etc are not working with the existing USB stack)
>
> What we have so far is in Markus' branch:
> http://gitweb.dragonflybsd.org/~profmakx/dragonfly.git/shortlog/refs/heads/usb
>
> It will be brought in before the 3.2 release (I'm working on that).
>

Thanks Sascha!

Petr

Re: What's the status of the USB stack port?

2012-09-01 Thread Sascha Wildner 

On Sat, 01 Sep 2012 11:44:47 +0200,  wrote:


Hi all,

Last time I heard there was someone working on the port. I'd be willing  
to

test (my dragonfly installation is long not used because my USB
peripherals - keyboard etc are not working with the existing USB stack)


What we have so far is in Markus' branch:  
http://gitweb.dragonflybsd.org/~profmakx/dragonfly.git/shortlog/refs/heads/usb


It will be brought in before the 3.2 release (I'm working on that).

What's the status of the USB stack port?

2012-09-01 Thread elekktretterr 
Hi all,

Last time I heard there was someone working on the port. I'd be willing to
test (my dragonfly installation is long not used because my USB
peripherals - keyboard etc are not working with the existing USB stack)

Cheers,
Petr