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/* This testcase is part of GDB, the GNU debugger.
Copyright 2022-2023 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Exercise AArch64's Scalable Vector Extension.
This test was based on QEMU's sve-ioctls.c test file. */
#include <stdio.h>
#include <sys/auxv.h>
#include <sys/prctl.h>
static int
do_sve_ioctl_test (void)
{
int i, res, init_vl;
res = prctl (PR_SVE_GET_VL, 0, 0, 0, 0);
if (res < 0)
{
printf ("FAILED to PR_SVE_GET_VL (%d)", res);
return -1;
}
init_vl = res & PR_SVE_VL_LEN_MASK;
for (i = init_vl; i > 15; i /= 2)
{
printf ("Checking PR_SVE_SET_VL=%d\n", i);
res = prctl (PR_SVE_SET_VL, i, 0, 0, 0, 0); /* break here */
if (res < 0)
{
printf ("FAILED to PR_SVE_SET_VL (%d)", res);
return -1;
}
}
return 0;
}
int
main (int argc, char **argv)
{
if (getauxval (AT_HWCAP) & HWCAP_SVE)
{
return do_sve_ioctl_test ();
}
else
{
printf ("SKIP: no HWCAP_SVE on this system\n");
return 1;
}
}
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