From a289a77d5de2a2cfa6b38f294b4ab953ebc1bfb8 Mon Sep 17 00:00:00 2001 From: obscuren Date: Thu, 21 Aug 2014 18:15:09 +0200 Subject: DUP n SWAP n --- ethvm/stack.go | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'ethvm/stack.go') diff --git a/ethvm/stack.go b/ethvm/stack.go index f4b0be393..82dd612c2 100644 --- a/ethvm/stack.go +++ b/ethvm/stack.go @@ -64,6 +64,18 @@ func (st *Stack) Peekn() (*big.Int, *big.Int) { return ints[0], ints[1] } +func (st *Stack) Swapn(n int) (*big.Int, *big.Int) { + st.data[n], st.data[0] = st.data[0], st.data[n] + + return st.data[n], st.data[0] +} + +func (st *Stack) Dupn(n int) *big.Int { + st.Push(st.data[n]) + + return st.Peek() +} + func (st *Stack) Push(d *big.Int) { st.data = append(st.data, new(big.Int).Set(d)) } -- cgit v1.2.3