Skip to content

enable eip7939 opcode CLZ #64

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

Merged
georgehao merged 6 commits into from
Oct 21, 2025
Merged

enable eip7939 opcode CLZ #64

Changes from 3 commits
Commits
Show all changes
6 commits
Select commit Hold shift + click to select a range
ab8a805
enable eip7939 opcode CLZ
georgehao Oct 20, 2025
f4c9cea
update
georgehao Oct 20, 2025
2251a5e
update
georgehao Oct 20, 2025
6357cf3
add clz test
georgehao Oct 20, 2025
f93e772
Merge branch 'main' of github.com:scroll-tech/scroll-revm into feat/e…
georgehao Oct 21, 2025
10d8d9a
fix error
georgehao Oct 21, 2025
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
19 changes: 19 additions & 0 deletions src/instructions.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -69,6 +69,7 @@ where
/// - `SELFDESTRUCT`
/// - `MCOPY`
/// - `DIFFICULTY`
/// - `CLZ`
pub fn make_scroll_instruction_table<WIRE: InterpreterTypes, HOST: ScrollContextTr>(
) -> InstructionTable<WIRE, HOST> {
let mut table = instruction_table::<WIRE, HOST>();
Expand All @@ -82,6 +83,7 @@ pub fn make_scroll_instruction_table<WIRE: InterpreterTypes, HOST: ScrollContext
table[opcode::SELFDESTRUCT as usize] = Instruction::new(selfdestruct::<WIRE, HOST>, 0);
table[opcode::MCOPY as usize] = Instruction::new(mcopy::<WIRE, HOST>, 0);
table[opcode::DIFFICULTY as usize] = Instruction::new(difficulty::<WIRE, HOST>, 2);
table[opcode::CLZ as usize] = Instruction::new(clz::<WIRE, HOST>, 5);

table
}
Expand Down Expand Up @@ -245,6 +247,23 @@ pub fn difficulty<WIRE: InterpreterTypes, H: Host + ?Sized>(
push!(context.interpreter, DIFFICULTY);
}

/// Implements the CLZ instruction
///
/// EIP-7939 count leading zeros.
fn clz<WIRE: InterpreterTypes, H: ScrollContextTr>(context: InstructionContext<'_, H, WIRE>) {
let host = context.host;
let interpreter = context.interpreter;
if !host.cfg().spec().is_enabled_in(ScrollSpecId::GALILEO) {
interpreter.halt(InstructionResult::NotActivated);
return;
}

popn_top!([], op1, context.interpreter);

let leading_zeros = op1.leading_zeros();
*op1 = U256::from(leading_zeros);
}

// HELPER FUNCTIONS
// ================================================================================================

Expand Down
Loading