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| author | Martin Storsjö <martin@martin.st> | 2023-10-23 11:27:29 +0300 |
|---|---|---|
| committer | Martin Storsjö <martin@martin.st> | 2023-10-31 12:23:27 +0200 |
| commit | f05948ada435d95fed3cc9279cec0ccef8a10a2c (patch) | |
| tree | 6601e737a3495e0de653f3f5e166a402cdc75498 /libavutil/aarch64/cpu.c | |
| parent | ae72412aa83d8bd81a2e437030285c9c58004421 (diff) | |
| download | ffmpeg-f05948ada435d95fed3cc9279cec0ccef8a10a2c.tar.gz | |
aarch64: Simplify the linux runtime cpu detection code
Skip doing the whole getauxval(AT_HWCAP) if HWCAP_CPUID isn't
defined.
Signed-off-by: Martin Storsjö <martin@martin.st>
Diffstat (limited to 'libavutil/aarch64/cpu.c')
| -rw-r--r-- | libavutil/aarch64/cpu.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/libavutil/aarch64/cpu.c b/libavutil/aarch64/cpu.c index bd780e8591..2b50c426bc 100644 --- a/libavutil/aarch64/cpu.c +++ b/libavutil/aarch64/cpu.c @@ -30,11 +30,9 @@ static int detect_flags(void) { int flags = 0; - unsigned long hwcap; - - hwcap = getauxval(AT_HWCAP); #if defined(HWCAP_CPUID) + unsigned long hwcap = getauxval(AT_HWCAP); // We can check for DOTPROD and I8MM using HWCAP_ASIMDDP and // HWCAP2_I8MM too, avoiding to read the CPUID registers (which triggers // a trap, handled by the kernel). However the HWCAP_* defines for these @@ -53,8 +51,6 @@ static int detect_flags(void) if (((tmp >> 52) & 0xf) == 0x1) flags |= AV_CPU_FLAG_I8MM; } -#else - (void)hwcap; #endif return flags; |