On Tue, 24 Oct 2023, Sean McGovern wrote:
On Tue, Oct 24, 2023, 08:23 Martin Storsjö <mar...@martin.st> wrote:
Skip doing the whole getauxval(AT_HWCAP) if HWCAP_CPUID isn't
defined.
---
libavutil/aarch64/cpu.c | 6 +-----
1 file changed, 1 insertion(+), 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;
--
2.34.1
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Good call, and LGTM.
Thanks, will push now.
// Martin
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