Bit shift operators

asm/opcodes.go

@@ -24,6 +24,11 @@ var opCodeByName = map[string]vm.OpCodeType{
 	"or":  vm.OpOr,
 	"xor": vm.OpXor,
 
+	"shiftright": vm.OpShiftRight,
+	"shr":        vm.OpShR,
+	"shiftleft":  vm.OpShiftLeft,
+	"shl":        vm.OpShL,
+
 	"isequal":                      vm.OpIsEqual,
 	"eq":                           vm.OpEq,
 	"islessthanunsigned":           vm.OpIsLessThanUnsigned,
@@ -89,6 +94,9 @@ var operandsByOpCode = map[vm.OpCodeType][]operandType{
 	vm.OpOr:  []operandType{r, u},
 	vm.OpXor: []operandType{r, u},
 
+	vm.OpShR: []operandType{r, u},
+	vm.OpShL: []operandType{r, u},
+
 	vm.OpEq:   []operandType{us, us},
 	vm.OpLTU:  []operandType{u, u},
 	vm.OpLTS:  []operandType{s, s},