Re: [Iverilog-devel] Wondering aloud about extended operand lists

[Anthony J B. <net...@nc...>]

On Fri, 11 Jan 2008, Stephen Williams wrote:

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> There are a handful of instructions in the vvp opcodes set that
> are really pressed for operands. They are reduced to using implicit
> index variables to carry operands that really can generally be
> immediate.

It's been a while since I've read that vvp opcodes doc, however note the
following cut and paste typos in opcodes.txt:

| * %xor <dst>, <src>, <wid>
|
| This does a bitwise exclusive or (^) of the <src> and <dst> vector,
| and leaves the result in the <dst> vector. xor is this:
|
|        0 xnor 0 --> 0
|        0 xnor 1 --> 1
|        1 xnor 0 --> 1
|        1 xnor 1 --> 0
|        otherwise    x

-Tony