1 /* glibc-hwcaps subdirectory test. x86_64 version.
2 Copyright (C) 2020-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19 #include <stdio.h>
20 #include <support/check.h>
21 #include <sys/param.h>
22 #include <elf.h>
23 #include <get-isa-level.h>
24
25 extern int marker2 (void);
26 extern int marker3 (void);
27 extern int marker4 (void);
28
29 /* Return the x86-64-vN level, 1 for the baseline. */
30 static int
compute_level(void)31 compute_level (void)
32 {
33 const struct cpu_features *cpu_features = __get_cpu_features ();
34 unsigned int isa_level = get_isa_level (cpu_features);
35
36 if (!(isa_level & GNU_PROPERTY_X86_ISA_1_V2))
37 return 1;
38 if (!(isa_level & GNU_PROPERTY_X86_ISA_1_V3))
39 return 2;
40 if (!(isa_level & GNU_PROPERTY_X86_ISA_1_V4))
41 return 3;
42 return 4;
43 }
44
45 static int
do_test(void)46 do_test (void)
47 {
48 int level = compute_level ();
49 printf ("info: detected x86-64 micro-architecture level: %d\n", level);
50 TEST_COMPARE (marker2 (), MIN (level, 2));
51 TEST_COMPARE (marker3 (), MIN (level, 3));
52 TEST_COMPARE (marker4 (), MIN (level, 4));
53 return 0;
54 }
55
56 #include <support/test-driver.c>
57