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This commit is contained in:
wborgeaud 2022-12-14 16:34:32 +01:00
parent f91dfe7e1a
commit 83a290331e
1 changed files with 7 additions and 8 deletions
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15
evm/src/cpu/kernel/interpreter.rs
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@ -385,12 +385,10 @@ impl<'a> Interpreter<'a> {
self.push(x.overflowing_sub(y).0);
}
// TODO: 107 is hardcoded as a dummy prime for testing
// should be changed to the proper implementation prime
fn run_addfp254(&mut self) {
let x = self.pop();
let y = self.pop();
let x = self.pop() % BN_BASE;
let y = self.pop() % BN_BASE;
// BN_BASE is 254-bit so addition can't overflow
self.push((x + y) % BN_BASE);
}
@ -401,9 +399,10 @@ impl<'a> Interpreter<'a> {
}
fn run_subfp254(&mut self) {
let x = self.pop();
let y = self.pop();
self.push((U256::from(107) + x - y) % BN_BASE);
let x = self.pop() % BN_BASE;
let y = self.pop() % BN_BASE;
// BN_BASE is 254-bit so addition can't overflow
self.push((x + (BN_BASE - y)) % BN_BASE);
}
fn run_div(&mut self) {