| 239 | } |
| 240 | |
| 241 | func opLshift(vm *virtualMachine) error { |
| 242 | err := vm.applyCost(8) |
| 243 | if err != nil { |
| 244 | return err |
| 245 | } |
| 246 | y, err := vm.popInt64(true) |
| 247 | if err != nil { |
| 248 | return err |
| 249 | } |
| 250 | if y < 0 { |
| 251 | return ErrBadValue |
| 252 | } |
| 253 | x, err := vm.popInt64(true) |
| 254 | if err != nil { |
| 255 | return err |
| 256 | } |
| 257 | if x == 0 || y == 0 { |
| 258 | return vm.pushInt64(x, true) |
| 259 | } |
| 260 | |
| 261 | res, ok := checked.LshiftInt64(x, y) |
| 262 | if !ok { |
| 263 | return ErrRange |
| 264 | } |
| 265 | |
| 266 | return vm.pushInt64(res, true) |
| 267 | } |
| 268 | |
| 269 | func opRshift(vm *virtualMachine) error { |
| 270 | err := vm.applyCost(8) |