[Iverilog-devel] Wondering aloud about extended operand lists

[Stephen W. <st...@ic...>]

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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.

So I'm wondering aloud if maybe it *is* time to extend the size
of the opcode space. In particular, I've been thinking of
adding to the second union a pointer to a vvp_code_extend_s
struct. This struct can be *much* more liberal, and can carry
more number values. This may wind up allowing us to replace
several hackish instructions with instructions with longer
operand lists.

- --
Steve Williams                "The woods are lovely, dark and deep.
steve at icarus.com           But I have promises to keep,
http://www.icarus.com         and lines to code before I sleep,
http://www.picturel.com       And lines to code before I sleep."
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