| /* Copyright lowRISC contributors. */ |
| /* Licensed under the Apache License, Version 2.0, see LICENSE for details. */ |
| /* SPDX-License-Identifier: Apache-2.0 */ |
| |
| /* |
| An example of underflowing the x1 stack. Make sure that we stop execution and |
| properly raise an alert. |
| */ |
| addi x10, x0, 10 |
| |
| /* Push once onto the stack */ |
| addi x1, x0, 123 |
| /* Pop once from the stack: this should be fine */ |
| addi x2, x1, 0 |
| |
| /* Push once onto the stack */ |
| addi x1, x0, 123 |
| /* Pop once from the stack (but with both input operands) */ |
| add x3, x1, x1 |
| |
| /* Pop again from the stack. ERROR! */ |
| addi x0, x1, 0 |
| |
| /* We shouldn't get here */ |
| addi x10, x0, 0 |
| ecall |
