[Libre-soc-isa] [Bug 924] potential major opcode allocation for SVP64

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=924

--- Comment #9 from Jacob Lifshay <programmerjake at gmail.com> ---
(In reply to Luke Kenneth Casson Leighton from comment #8)
> damn, i messed up, need help reviewing this:
> 
> | 0-5 | 6 | 7 | 8-31  | 32:33 |  Description               |
> |-----|---|---|-------|-------|---------------------------|
> | PO9?| 0 | 0 | 0000  | 11    | RESERVED (other)          |
> | PO9?| 0 | 0 | !zero | 11    | SVP64 (current and future) |
> | PO9?| 0 | 1 | xxxx  | 11    | SVP64 (current and future) |
> | PO9?| 0 | x | xxxx  | 01    | RESERVED (other)          |
> | PO9?| 0 | x | xxxx  | 10    | RESERVED (other)          |
> | PO9?| 0 | x | xxxx  | 00    | RESERVED (other)          |
> | PO9?| 1 | x | xxxx  | xx    | SVP64 (current and future) |

may i suggest kinda reversing the order by having bit 6 = 1 mean new and bit 6
= 0 mean old, also for new have bit 32:33 = 0 mean svp64, and bit 32:33 != 0
mean reserved?

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