Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Some EIP-663 updates #2056

Merged
merged 2 commits into from
May 21, 2019
Merged

Some EIP-663 updates #2056

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
c5995fe
Add opcode to EIP-663 for short dup/swaps
axic May 17, 2019
d2f5f5c
Add mention of EIP-174 and Rootstock RSKIP26
axic May 21, 2019
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
8 changes: 7 additions & 1 deletion EIPS/eip-663.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -47,7 +47,7 @@ This results in wasting a byte in the cases of only referring to the top 255 sta

### Option C

This option extends Option A with two new instructions, `DUPSn` and `SWAPSn`, where the value of `n` is encoded as an 8-bit immediate value following the opcode.
This option extends Option B with two new instructions, `DUPSn` (`0xb2`) and `SWAPSn` (`0xb3`), where the value of `n` is encoded as an 8-bit immediate value following the opcode.

The value `n` has a range of 0 to 255, but otherwise the same rules apply as in Option A.

Expand All @@ -68,6 +68,12 @@ This has no effect on backwards compatibility.

TBA

## References

A similar proposal was made with [EIP-174](https://github.com/ethereum/EIPs/issues/174). Read the thread for some detailed discussion.

Rootstock [RSKIP26](https://github.com/rsksmart/RSKIPs/blob/master/IPs/RSKIP26.md) also introduced `SWAPN` and `DUPN` with Option A described above.

## Copyright

Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).