1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
178 lines
3.5 KiB
C
178 lines
3.5 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2023-2024 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Exercise various cases of reading/writing ZA contents for AArch64's
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Scalable Matrix Extension. */
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#include <stdio.h>
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#include <sys/auxv.h>
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#include <sys/prctl.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#ifndef HWCAP_SVE
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#define HWCAP_SVE (1 << 22)
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#endif
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#ifndef HWCAP2_SME
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#define HWCAP2_SME (1 << 23)
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#endif
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#ifndef PR_SVE_SET_VL
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#define PR_SVE_SET_VL 50
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#define PR_SVE_GET_VL 51
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#define PR_SVE_VL_LEN_MASK 0xffff
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#endif
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#ifndef PR_SME_SET_VL
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#define PR_SME_SET_VL 63
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#define PR_SME_GET_VL 64
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#define PR_SME_VL_LEN_MASK 0xffff
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#endif
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static void
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enable_za ()
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{
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/* smstart za */
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__asm __volatile (".word 0xD503457F");
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}
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static void
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disable_za ()
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{
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/* smstop za */
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__asm __volatile (".word 0xD503447F");
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}
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static int get_vl_size ()
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{
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int res = prctl (PR_SVE_GET_VL, 0, 0, 0, 0);
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if (res < 0)
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{
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printf ("FAILED to PR_SVE_GET_VL (%d)\n", res);
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return -1;
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}
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return (res & PR_SVE_VL_LEN_MASK);
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}
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static int get_svl_size ()
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{
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int res = prctl (PR_SME_GET_VL, 0, 0, 0, 0);
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if (res < 0)
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{
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printf ("FAILED to PR_SME_GET_VL (%d)\n", res);
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return -1;
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}
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return (res & PR_SVE_VL_LEN_MASK);
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}
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static int set_vl_size (int new_vl)
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{
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int res = prctl (PR_SVE_SET_VL, new_vl, 0, 0, 0, 0);
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if (res < 0)
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{
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printf ("FAILED to PR_SVE_SET_VL (%d)\n", res);
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return -1;
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}
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res = get_vl_size ();
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if (res != new_vl)
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{
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printf ("Unexpected VL value (%d)\n", res);
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return -1;
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}
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return res;
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}
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static int set_svl_size (int new_svl)
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{
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int res = prctl (PR_SME_SET_VL, new_svl, 0, 0, 0, 0);
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if (res < 0)
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{
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printf ("FAILED to PR_SME_SET_VL (%d)\n", res);
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return -1;
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}
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res = get_svl_size ();
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if (res != new_svl)
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{
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printf ("Unexpected SVL value (%d)\n", res);
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return -1;
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}
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return res;
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}
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static int
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test_id_to_vl (int id)
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{
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return 16 << ((id / 5) % 5);
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}
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static int
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test_id_to_svl (int id)
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{
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return 16 << (id % 5);
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}
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static void
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dummy ()
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{
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}
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int
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main (int argc, char **argv)
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{
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if (getauxval (AT_HWCAP) & HWCAP_SVE && getauxval (AT_HWCAP2) & HWCAP2_SME)
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{
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int id_start = ID_START;
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int id_end = ID_END;
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for (int id = id_start; id <= id_end; id++)
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{
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int vl = test_id_to_vl (id);
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int svl = test_id_to_svl (id);
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if (set_vl_size (vl) == -1 || set_svl_size (svl) == -1)
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continue;
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enable_za ();
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dummy (); /* stop 1 */
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}
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for (int id = id_start; id <= id_end; id++)
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{
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int vl = test_id_to_vl (id);
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int svl = test_id_to_svl (id);
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if (set_vl_size (vl) == -1 || set_svl_size (svl) == -1)
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continue;
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disable_za ();
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dummy (); /* stop 2 */
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}
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}
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else
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{
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printf ("SKIP: no HWCAP_SVE or HWCAP2_SME on this system\n");
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return -1;
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}
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return 0;
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}
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