[Ffmpeg-devel] ac3enc.c modifications

[Måns Rullgård]

Rich Felker <dalias at aerifal.cx> writes:

> On Fri, May 20, 2005 at 12:56:07AM +0200, M?ns Rullg?rd wrote:
>> Rich Felker <dalias at aerifal.cx> writes:
>> 
>> > On Thu, May 19, 2005 at 09:53:33PM +0200, Michael Niedermayer wrote:
>> >> both float and int should be supported, there are people with cpus
>> >> where float IS faster then int
>> >
>> > This is only possible if the cpu has a horribly botched integer
>> > implementation.
>> 
>> Or a damn good floating point unit.  Have you ever used an IBM Power
>> or Digital Alpha CPU?  A 300 MHz IBM Power3 (Power5 is the latest) I
>> ran some tests on beat a 1 GHz Pentium3 at floating point math, as did
>> a 500 MHz Alpha a few generations older than the P3.
>
> but will a 300 mhz ibm power3 using floats beat a 1ghz athlon using
> integers? i think not!

Probably not, but the point was that there are machines where floating
point is significantly faster than on x86.  On these machines, the
difference between floating point and integer math is rather small,
which is not equivalent to having a "horribly botched" integer unit,
as you asserted.

-- 
M?ns Rullg?rd
mru at inprovide.com