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--- third_party/libaom/source/libaom/aom_ports/aarch64_cpudetect.c.orig 2024-06-03 12:28:28 UTC
+++ third_party/libaom/source/libaom/aom_ports/aarch64_cpudetect.c
@@ -99,9 +99,45 @@ static int arm_get_cpu_caps(void) {
return flags;
}
-#elif defined(__linux__) // end defined(AOM_USE_ANDROID_CPU_FEATURES)
+#elif defined(__OpenBSD__)
+#include <sys/sysctl.h>
+#include <machine/cpu.h>
+#include <machine/armreg.h>
+static int arm_get_cpu_caps(void) {
+ int flags = 0;
+ int isar0_mib[] = { CTL_MACHDEP, CPU_ID_AA64ISAR0 };
+ uint64_t cpu_id = 0;
+ size_t len = sizeof(cpu_id);
+
+ flags |= HAS_NEON; // Neon is mandatory in Armv8.0-A.
+
+ if (sysctl(isar0_mib, 2, &cpu_id, &len, NULL, 0) < 0)
+ return flags;
+
+ if (ID_AA64ISAR0_CRC32(cpu_id) >= ID_AA64ISAR0_CRC32_BASE)
+ flags |= HAS_ARM_CRC32;
+
+ return flags;
+}
+
+#elif defined(__linux__) || defined(__FreeBSD__) // end defined(AOM_USE_ANDROID_CPU_FEATURES)
+
#include <sys/auxv.h>
+
+#if defined(__FreeBSD__)
+static unsigned long getauxval(unsigned long type)
+{
+ /* Only AT_HWCAP* return unsigned long */
+ if (type != AT_HWCAP && type != AT_HWCAP2) {
+ return 0;
+ }
+
+ unsigned long ret = 0;
+ elf_aux_info(type, &ret, sizeof(ret));
+ return ret;
+}
+#endif
// Define hwcap values ourselves: building with an old auxv header where these
// hwcap values are not defined should not prevent features from being enabled.
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