cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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mma.S (699B)

      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	/* Store result in image passed in r5 */
     24	stxvw4x	0,0,5
     25	addi	5,5,16
     26	stxvw4x	1,0,5
     27	addi	5,5,16
     28	stxvw4x	2,0,5
     29	addi	5,5,16
     30	stxvw4x	3,0,5
     31	addi	5,5,16
     32
     33	blr