| 1 | # |
| 2 | # Translation routines for the instructions of the xlrbr ISA extension |
| 3 | # (matching the draft encodings in the standard reserved encoding space for the |
| 4 | # unratified Zbr CRC32 bitmanip extension version 0.93). |
| 5 | # |
| 6 | # Copyright (c) 2026 Rivos Inc. |
| 7 | # |
| 8 | # SPDX-License-Identifier: GPL-2.0-or-later |
| 9 | |
| 10 | # Fields: |
| 11 | %rs1 15:5 |
| 12 | %rd 7:5 |
| 13 | |
| 14 | # Argument sets: |
| 15 | &r2 rd rs1 !extern |
| 16 | |
| 17 | # Formats 32: |
| 18 | @r2 ....... ..... ..... ... ..... ....... &r2 %rs1 %rd |
| 19 | |
| 20 | # *** RV32 xlrbr extension *** |
| 21 | crc32_b 0110000 10000 ..... 001 ..... 0010011 @r2 |
| 22 | crc32_h 0110000 10001 ..... 001 ..... 0010011 @r2 |
| 23 | crc32_w 0110000 10010 ..... 001 ..... 0010011 @r2 |
| 24 | crc32c_b 0110000 11000 ..... 001 ..... 0010011 @r2 |
| 25 | crc32c_h 0110000 11001 ..... 001 ..... 0010011 @r2 |
| 26 | crc32c_w 0110000 11010 ..... 001 ..... 0010011 @r2 |
| 27 | |
| 28 | # *** RV64 xlrbr extension (in addition to RV32) *** |
| 29 | crc32_d 0110000 10011 ..... 001 ..... 0010011 @r2 |
| 30 | crc32c_d 0110000 11011 ..... 001 ..... 0010011 @r2 |