1 /*
2 * Copyright © 2023, VideoLAN and dav1d authors
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
19 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
22 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
24 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include "config.h"
28 #include "common/attributes.h"
29 #include "src/loongarch/cpu.h"
30
31 #if defined(HAVE_GETAUXVAL)
32 #include <sys/auxv.h>
33
34 #define LA_HWCAP_LSX ( 1 << 4 )
35 #define LA_HWCAP_LASX ( 1 << 5 )
36 #endif
37
dav1d_get_cpu_flags_loongarch(void)38 COLD unsigned dav1d_get_cpu_flags_loongarch(void) {
39 unsigned flags = 0;
40 #if defined(HAVE_GETAUXVAL)
41 unsigned long hw_cap = getauxval(AT_HWCAP);
42 flags |= (hw_cap & LA_HWCAP_LSX) ? DAV1D_LOONGARCH_CPU_FLAG_LSX : 0;
43 flags |= (hw_cap & LA_HWCAP_LASX) ? DAV1D_LOONGARCH_CPU_FLAG_LASX : 0;
44 #endif
45
46 return flags;
47 }
48