1 /*
2 * Copyright © 2019, VideoLAN and dav1d authors
3 * Copyright © 2019, Janne Grunau
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright notice, this
10 * list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "config.h"
29
30 #include "common/attributes.h"
31
32 #include "src/cpu.h"
33 #include "src/ppc/cpu.h"
34
35 #define HAVE_AUX ((HAVE_GETAUXVAL || HAVE_ELF_AUX_INFO) && ARCH_PPC64LE)
36 #if HAVE_AUX
37 #include <sys/auxv.h>
38 #endif
39
dav1d_get_cpu_flags_ppc(void)40 COLD unsigned dav1d_get_cpu_flags_ppc(void) {
41 unsigned flags = dav1d_get_default_cpu_flags();
42 #if HAVE_GETAUXVAL && ARCH_PPC64LE
43 unsigned long hw_cap = getauxval(AT_HWCAP);
44 unsigned long hw_cap2 = getauxval(AT_HWCAP2);
45 #elif HAVE_ELF_AUX_INFO && ARCH_PPC64LE
46 unsigned long hw_cap = 0;
47 unsigned long hw_cap2 = 0;
48 elf_aux_info(AT_HWCAP, &hw_cap, sizeof(hw_cap));
49 elf_aux_info(AT_HWCAP2, &hw_cap2, sizeof(hw_cap2));
50 #endif
51 #if HAVE_AUX
52 flags |= (hw_cap & PPC_FEATURE_HAS_VSX) ? DAV1D_PPC_CPU_FLAG_VSX : 0;
53 flags |= (hw_cap2 & PPC_FEATURE2_ARCH_3_00) ? DAV1D_PPC_CPU_FLAG_PWR9 : 0;
54 #endif
55 return flags;
56 }
57