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Using overflowing operations

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This commit is contained in:
Tomusdrw 2016-01-15 01:48:53 +01:00
parent e8b9ef202c
commit 66b0e4af35
1 changed files with 10 additions and 5 deletions
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15
src/evm/interpreter.rs
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@ -696,23 +696,27 @@ impl Interpreter {
instructions::ADD => {
let a = stack.pop_back();
let b = stack.pop_back();
stack.push(a + b);
let (c, _overflow) = a.overflowing_add(a, b);
stack.push(c);
},
instructions::MUL => {
let a = stack.pop_back();
let b = stack.pop_back();
stack.push(a * b);
let (c, _overflow) = a.overflowing_mul(a, b);
stack.push(c);
},
instructions::SUB => {
let a = stack.pop_back();
let b = stack.pop_back();
stack.push(a - b);
let (c, _overflow) = a.overflowing_sub(a, b);
stack.push(c);
},
instructions::DIV => {
let a = stack.pop_back();
let b = stack.pop_back();
stack.push(if !self.is_zero(&b) {
a / b
let (c, _overflow) = a.overflowing_div(a, b);
c
} else {
U256::zero()
});
@ -721,7 +725,8 @@ impl Interpreter {
let a = stack.pop_back();
let b = stack.pop_back();
stack.push(if !self.is_zero(&b) {
a % b
let (c, _overflow) = a.overflowing_rem(a, b);
c
} else {
U256::zero()
});