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-rw-r--r--core/vm/instructions.go5
1 files changed, 3 insertions, 2 deletions
diff --git a/core/vm/instructions.go b/core/vm/instructions.go
index 3352877c1..94a8c6348 100644
--- a/core/vm/instructions.go
+++ b/core/vm/instructions.go
@@ -21,6 +21,7 @@ import (
"math/big"
"github.com/ethereum/go-ethereum/common"
+ "github.com/ethereum/go-ethereum/common/math"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/params"
)
@@ -192,8 +193,8 @@ func opSmod(instr instruction, pc *uint64, env Environment, contract *Contract,
}
func opExp(instr instruction, pc *uint64, env Environment, contract *Contract, memory *Memory, stack *Stack) {
- x, y := stack.pop(), stack.pop()
- stack.push(U256(x.Exp(x, y, Pow256)))
+ base, exponent := stack.pop(), stack.pop()
+ stack.push(math.Exp(base, exponent))
}
func opSignExtend(instr instruction, pc *uint64, env Environment, contract *Contract, memory *Memory, stack *Stack) {