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core/vm: expose intpool to stack dup method 

Improve the duplication method of the stack to reuse big ints by passing
in an existing integer pool.
This commit is contained in:
Jeffrey Wilcke 2017-05-23 10:52:11 +02:00
parent e16a7ef60f
commit 10582a97ca
2 changed files with 3 additions and 3 deletions
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2
core/vm/instructions.go
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@ -731,7 +731,7 @@ func makePush(size uint64, pushByteSize int) executionFunc {
// make push instruction function
func makeDup(size int64) executionFunc {
return func(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
stack.dup(int(size))
stack.dup(evm.interpreter.intPool, int(size))
return nil, nil
}
}

4
core/vm/stack.go
View File

@ -60,8 +60,8 @@ func (st *Stack) swap(n int) {
st.data[st.len()-n], st.data[st.len()-1] = st.data[st.len()-1], st.data[st.len()-n]
}
func (st *Stack) dup(n int) {
st.push(new(big.Int).Set(st.data[st.len()-n]))
func (st *Stack) dup(pool *intPool, n int) {
st.push(pool.get().Set(st.data[st.len()-n]))
}
func (st *Stack) peek() *big.Int {