diff options
author | Carlos O'Donell <carlos_odonell@mentor.com> | 2012-05-16 20:14:24 -0700 |
---|---|---|
committer | Carlos O'Donell <carlos_odonell@mentor.com> | 2012-05-17 06:59:28 -0700 |
commit | 1a0994f5356214e8af8a1c1cc33fbf74a7ac8993 (patch) | |
tree | 99ce1f919a2509868a71f4262f055b5eec9accb0 /sysdeps/x86_64/multiarch/test-multiarch.c | |
parent | 0af797def371ceb4f05586d7bcd25841653d2082 (diff) | |
download | glibc-1a0994f5356214e8af8a1c1cc33fbf74a7ac8993.tar.gz glibc-1a0994f5356214e8af8a1c1cc33fbf74a7ac8993.tar.xz glibc-1a0994f5356214e8af8a1c1cc33fbf74a7ac8993.zip |
BZ#14059: Fix AVX and FMA4 detection.
Fix AVX and FMA4 detection by following the guidelines set out by Intel and AMD for detecting these features.
Diffstat (limited to 'sysdeps/x86_64/multiarch/test-multiarch.c')
-rw-r--r-- | sysdeps/x86_64/multiarch/test-multiarch.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/test-multiarch.c b/sysdeps/x86_64/multiarch/test-multiarch.c new file mode 100644 index 0000000000..76b1af2f8c --- /dev/null +++ b/sysdeps/x86_64/multiarch/test-multiarch.c @@ -0,0 +1,90 @@ +/* Test CPU feature data. + This file is part of the GNU C Library. + Copyright (C) 2012 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 + <http://www.gnu.org/licenses/>. */ + +#include <init-arch.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"); + 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_AVX, "HAS_AVX"); + fails += check_proc ("fma4", HAS_FMA4, "HAS_FMA4"); + fails += check_proc ("sse4_2", HAS_SSE4_2, "HAS_SSE4_2"); + fails += check_proc ("sse4_1", HAS_SSE4_1, "HAS_SSE4_1"); + fails += check_proc ("ssse3", HAS_SSSE3, "HAS_SSSE3"); + fails += check_proc ("popcnt", HAS_POPCOUNT, "HAS_POPCOUNT"); + + printf ("%d differences between /proc/cpuinfo and glibc code.\n", fails); + + return (fails != 0); +} + +#include "../../../test-skeleton.c" |