diff options
Diffstat (limited to 'sysdeps/x86_64/tst-avx.c')
-rw-r--r-- | sysdeps/x86_64/tst-avx.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/sysdeps/x86_64/tst-avx.c b/sysdeps/x86_64/tst-avx.c new file mode 100644 index 0000000000..ec2e3a79ff --- /dev/null +++ b/sysdeps/x86_64/tst-avx.c @@ -0,0 +1,49 @@ +/* Test case for preserved AVX registers in dynamic linker. + Copyright (C) 2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 <cpuid.h> + +int tst_avx_aux (void); + +static int +avx_enabled (void) +{ + unsigned int eax, ebx, ecx, edx; + + if (__get_cpuid (1, &eax, &ebx, &ecx, &edx) == 0 + || (ecx & (bit_AVX | bit_OSXSAVE)) != (bit_AVX | bit_OSXSAVE)) + return 0; + + /* Check the OS has AVX and SSE saving enabled. */ + asm ("xgetbv" : "=a" (eax), "=d" (edx) : "c" (0)); + + return (eax & 6) == 6; +} + +static int +do_test (void) +{ + /* Run AVX test only if AVX is supported. */ + if (avx_enabled ()) + return tst_avx_aux (); + else + return 77; +} + +#define TEST_FUNCTION do_test () +#include "../../test-skeleton.c" |