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Re: [avr-gcc-list] floating point calculations - How many cycles


From: Joerg Wunsch
Subject: Re: [avr-gcc-list] floating point calculations - How many cycles
Date: Sun, 26 Jun 2005 12:41:58 +0200 (MET DST)

intiha Ho gai <address@hidden> wrote:

> I know this is a kinda elementary question, but i am not sure how to
> calcuate the number of clock cycles on an Atmel 128L (7.3Mhz) would
> the following line of code doing floating point multiplication take.
> 
> currTime = (uint32_t)(skew_*(double)currTime + offset_);//compensation
> over here!!

It took me 176 ┬Ás on an ATmega128 clocked with twice your system
clock.

-- 
cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)




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