blob: 9566e2bfd1a1168d40ca8071b2f655385ceae2ee (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
--- gegl/gegl-cpuaccel.c.orig 2022-07-07 02:35:48 UTC
+++ gegl/gegl-cpuaccel.c
@@ -552,32 +552,18 @@ arch_accel (void)
#include <fcntl.h>
#include <string.h>
#include <elf.h>
+#include <sys/auxv.h>
#define HAVE_ACCEL 1
static guint32
arch_accel (void)
{
- /* TODO : add or hardcode the other ways it can be on arm, where
- * this info comes from the system and not from running cpu
- * instructions
- */
- int has_neon = 0;
- int fd = open ("/proc/self/auxv", O_RDONLY);
- Elf32_auxv_t auxv;
- if (fd >= 0)
- {
- while (read (fd, &auxv, sizeof (Elf32_auxv_t)) == sizeof (Elf32_auxv_t))
- {
- if (auxv.a_type == AT_HWCAP)
- {
- if (auxv.a_un.a_val & 4096)
- has_neon = 1;
- }
- }
- close (fd);
- }
- return has_neon?GEGL_CPU_ACCEL_ARM_NEON:0;
+ unsigned long hwcap = 0;
+
+ elf_aux_info(AT_HWCAP, &hwcap, sizeof hwcap);
+
+ return hwcap & HWCAP_NEON ? GEGL_CPU_ACCEL_ARM_NEON : 0;
}
#endif /* ARCH_ARM */
|
