Re: NAND

On Sun, 30 Apr 2006 19:58:33 +0200, Christian Christmann
<plfriko@xxxxxxxx> wrote:

I'm playing with the MIPS assembly language. There is no NAND instruction
in the MIPS ISA, just AND, NOR, OR and XOR. How can I implement the NAND
operation efficiently using the present instructions?

I have heard of NAND gates in TTL (and other) logic chips, but I never
heard of any computer with a NAND instruction. Doesn't mean there
isn't one, I just never heard of any. :-)

Anyway, test out:

r = ( s1 AND s2 ) XOR -1

Where -1 means all bits set to 1 in the register



Thank you.

Chris
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