AVR-Chat

Hi Bob,

I had an issue where I need to do 64bit Mult/Div and ICCAVR does/did not
support long long

So I rolled my own - well not exactly - Google is your friend.

Here's where I found the pointer I needed

http://www.hackersdelight.org/

 

One final 'hint' -  debug your math  functions on the PC (VS2010 does
support 64bit, GCC might - IDK)

Then you can compare your results with the 'native'  result.

 

HTH

Ivan Vernot

 

 

 

 

From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf
Of bobgardner@aol.com
Sent: Tuesday, 26 June 2012 10:09 AM
To: AVR-Chat@yahoogroups.com
Subject: [AVR-Chat] uint64_t in iccv7avr?

 

  

I know its nutty to want to do 64 bit schtuff on an 8 bit micro, but its
getting hard to find a microsd card thats less than 4GB, and those all need
the 64bit vars in the structs for the fat32 vars.Yeah yeah, I know gnu seems
to support them, but I cant get past the byzantine read_pgm_byte and
progmem_P decorations. All those smart maintainers. Cant they just push all
that stuff into the compiler somehow instead of those unreadable macros?
Phew. That made me feel better for some reason. So if someone knows some way
of some way of dealing with longlongs using the imagecraft compiler, I'd
love to look at it. Looking fwd to reading any answers.

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