| /* Copyright lowRISC contributors. */ |
| /* Licensed under the Apache License, Version 2.0, see LICENSE for details. */ |
| /* SPDX-License-Identifier: Apache-2.0 */ |
| |
| /* A basic example of using loop / loopi instructions to increment a |
| counter |
| |
| In C-like pseudo-code, this would be: |
| |
| x2 = 0; |
| x3 = 3; |
| |
| for (int i = 0; i < 4; ++i) { |
| x2 += 10; |
| for (int j = 0; j < x3; ++j) { |
| x2 += 1; |
| } |
| } |
| |
| The outer loop executes 4 times and the inner loop executes 3 times |
| on each iteration, so we increment x2 by 4*(10 + 3*1) = 52. |
| |
| */ |
| addi x2, x0, 0 |
| addi x3, x0, 3 |
| |
| loopi 4, 4 |
| addi x2, x2, 10 |
| loop x3, 1 |
| addi x2, x2, 1 |
| nop |
| |
| ecall |
