add test cases from the EIP

Author: jwasinger

core/vm/contracts_test.go

@@ -52,6 +52,7 @@ var allPrecompiles = map[common.Address]PrecompiledContract{
 	common.BytesToAddress([]byte{4}):    &dataCopy{},
 	common.BytesToAddress([]byte{5}):    &bigModExp{eip2565: false},
 	common.BytesToAddress([]byte{0xf5}): &bigModExp{eip2565: true},
+	common.BytesToAddress([]byte{0xf6}): &bigModExp{eip2565: true, eip7883: true},
 	common.BytesToAddress([]byte{6}):    &bn256AddIstanbul{},
 	common.BytesToAddress([]byte{7}):    &bn256ScalarMulIstanbul{},
 	common.BytesToAddress([]byte{8}):    &bn256PairingIstanbul{},
@@ -238,6 +239,9 @@ func BenchmarkPrecompiledModExp(b *testing.B) { benchJson("modexp", "05", b) }
 func TestPrecompiledModExpEip2565(t *testing.T)      { testJson("modexp_eip2565", "f5", t) }
 func BenchmarkPrecompiledModExpEip2565(b *testing.B) { benchJson("modexp_eip2565", "f5", b) }
 
+func TestPrecompiledModExpEip7883(t *testing.T)      { testJson("modexp_eip7883", "f6", t) }
+func BenchmarkPrecompiledModExpEip7883(b *testing.B) { benchJson("modexp_eip7883", "f6", b) }
+
 // Tests the sample inputs from the elliptic curve addition EIP 213.
 func TestPrecompiledBn256Add(t *testing.T)      { testJson("bn256Add", "06", t) }
 func BenchmarkPrecompiledBn256Add(b *testing.B) { benchJson("bn256Add", "06", b) }