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[avr-gcc-list] AT90USB82 / AT90USB162 architecture?

From: Paulo Marques
Subject: [avr-gcc-list] AT90USB82 / AT90USB162 architecture?
Date: Fri, 30 May 2008 19:25:10 +0100
User-agent: Thunderbird (X11/20071210)

Hi all,

I was trying to determine if these devices have multiply instructions or not.

The datasheet doesn't show any MUL* instructions in the "Instruction Set Summary" section, but the avr-libc documentation pages at:


show these devices as "avr5" which has multiply instructions, and at least avr-gcc 4.2.2 also emits multiply instructions for these devices.

Note that the AT90USB64x/128x variants do have MUL* instructions in their datasheets.

Is this a bug in the current tools (binutils/gcc/documentation)?

Paulo Marques
Software Development Department - Grupo PIE, S.A.
Phone: +351 252 290600, Fax: +351 252 290601
Web: www.grupopie.com

"I used to be indecisive, but now I'm not so sure."

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