From 8339a45400458ab91f973ef671cbf99e38284e7e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= Date: Tue, 12 Mar 2024 10:23:15 +0200 Subject: [PATCH] aarch64: Factorize code for CPU feature detection on Apple platforms MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Martin Storsjö --- libavutil/aarch64/cpu.c | 25 +++++++++++++------------ 1 file changed, 13 insertions(+), 12 deletions(-) diff --git a/libavutil/aarch64/cpu.c b/libavutil/aarch64/cpu.c index 7a05391343..196bdaf6b0 100644 --- a/libavutil/aarch64/cpu.c +++ b/libavutil/aarch64/cpu.c @@ -45,22 +45,23 @@ static int detect_flags(void) #elif defined(__APPLE__) && HAVE_SYSCTLBYNAME #include +static int have_feature(const char *feature) { + uint32_t value = 0; + size_t size = sizeof(value); + if (!sysctlbyname(feature, &value, &size, NULL, 0)) + return value; + return 0; +} + static int detect_flags(void) { - uint32_t value = 0; - size_t size; int flags = 0; - size = sizeof(value); - if (!sysctlbyname("hw.optional.arm.FEAT_DotProd", &value, &size, NULL, 0)) { - if (value) - flags |= AV_CPU_FLAG_DOTPROD; - } - size = sizeof(value); - if (!sysctlbyname("hw.optional.arm.FEAT_I8MM", &value, &size, NULL, 0)) { - if (value) - flags |= AV_CPU_FLAG_I8MM; - } + if (have_feature("hw.optional.arm.FEAT_DotProd")) + flags |= AV_CPU_FLAG_DOTPROD; + if (have_feature("hw.optional.arm.FEAT_I8MM")) + flags |= AV_CPU_FLAG_I8MM; + return flags; }