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/* Test CPU feature data.
This file is part of the GNU C Library.
Copyright (C) 2012-2019 Free Software Foundation, Inc.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <cpu-features.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static char *cpu_flags;
/* Search for flags in /proc/cpuinfo and store line
in cpu_flags. */
void
get_cpuinfo (void)
{
FILE *f;
char *line = NULL;
size_t len = 0;
ssize_t read;
f = fopen ("/proc/cpuinfo", "r");
if (f == NULL)
{
printf ("cannot open /proc/cpuinfo\n");
exit (1);
}
while ((read = getline (&line, &len, f)) != -1)
{
if (strncmp (line, "flags", 5) == 0)
{
cpu_flags = strdup (line);
break;
}
}
fclose (f);
free (line);
}
int
check_proc (const char *proc_name, int flag, const char *name)
{
int found = 0;
printf ("Checking %s:\n", name);
printf (" init-arch %d\n", flag);
if (strstr (cpu_flags, proc_name) != NULL)
found = 1;
printf (" cpuinfo (%s) %d\n", proc_name, found);
if (found != flag)
printf (" *** failure ***\n");
return (found != flag);
}
static int
do_test (int argc, char **argv)
{
int fails;
get_cpuinfo ();
fails = check_proc ("avx", HAS_ARCH_FEATURE (AVX_Usable),
"HAS_ARCH_FEATURE (AVX_Usable)");
fails += check_proc ("fma4", HAS_ARCH_FEATURE (FMA4_Usable),
"HAS_ARCH_FEATURE (FMA4_Usable)");
fails += check_proc ("sse4_2", HAS_CPU_FEATURE (SSE4_2),
"HAS_CPU_FEATURE (SSE4_2)");
fails += check_proc ("sse4_1", HAS_CPU_FEATURE (SSE4_1)
, "HAS_CPU_FEATURE (SSE4_1)");
fails += check_proc ("ssse3", HAS_CPU_FEATURE (SSSE3),
"HAS_CPU_FEATURE (SSSE3)");
fails += check_proc ("popcnt", HAS_CPU_FEATURE (POPCNT),
"HAS_CPU_FEATURE (POPCNT)");
printf ("%d differences between /proc/cpuinfo and glibc code.\n", fails);
return (fails != 0);
}
#include "../../../test-skeleton.c"
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