tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0-or-later
2 *
3 * Test basic matrix multiply assist (MMA) functionality if available.
4 *
5 * Copyright 2020, Alistair Popple, IBM Corp.
6 */
7 .global test_mma
8test_mma:
9 /* Load accumulator via VSX registers from image passed in r3 */
10 lxvh8x 4,0,3
11 lxvh8x 5,0,4
12
13 /* Clear and prime the accumulator (xxsetaccz) */
14 .long 0x7c030162
15
16 /* Prime the accumulator with MMA VSX move to accumulator
17 * X-form (xxmtacc) (not needed due to above zeroing) */
18 //.long 0x7c010162
19
20 /* xvi16ger2s */
21 .long 0xec042958
22
23 /* Deprime the accumulator - xxmfacc 0 */
24 .long 0x7c000162
25
26 /* Store result in image passed in r5 */
27 stxvw4x 0,0,5
28 addi 5,5,16
29 stxvw4x 1,0,5
30 addi 5,5,16
31 stxvw4x 2,0,5
32 addi 5,5,16
33 stxvw4x 3,0,5
34 addi 5,5,16
35
36 blr