Here is a diff to add arm64 CPU feature detection support to
aom and libvpx.
Index: aom/Makefile
===================================================================
RCS file: /cvs/ports/multimedia/aom/Makefile,v
retrieving revision 1.23
diff -u -p -u -p -r1.23 Makefile
--- aom/Makefile 7 May 2024 15:01:42 -0000 1.23
+++ aom/Makefile 23 May 2024 05:24:58 -0000
@@ -3,6 +3,7 @@ COMMENT= Alliance for Open Media AV1 vid
V= 3.9.0
DISTNAME= libaom-$V
PKGNAME= aom-$V
+REVISION= 0
CATEGORIES= multimedia
SHARED_LIBS= aom 4.2
Index: aom/patches/patch-aom_ports_aarch64_cpudetect_c
===================================================================
RCS file:
/cvs/ports/multimedia/aom/patches/patch-aom_ports_aarch64_cpudetect_c,v
retrieving revision 1.2
diff -u -p -u -p -r1.2 patch-aom_ports_aarch64_cpudetect_c
--- aom/patches/patch-aom_ports_aarch64_cpudetect_c 7 May 2024 15:01:42
-0000 1.2
+++ aom/patches/patch-aom_ports_aarch64_cpudetect_c 23 May 2024 05:24:58
-0000
@@ -1,23 +1,38 @@
-Allow ARM CPU runtime detection code to build on OpenBSD.
+Add AArch64 CPU feature detection support for OpenBSD.
Index: aom_ports/aarch64_cpudetect.c
--- aom_ports/aarch64_cpudetect.c.orig
+++ aom_ports/aarch64_cpudetect.c
-@@ -19,7 +19,7 @@
- #include <sys/sysctl.h>
- #endif
-
--#if !CONFIG_RUNTIME_CPU_DETECT
-+#if !CONFIG_RUNTIME_CPU_DETECT || defined(__OpenBSD__)
-
- static int arm_get_cpu_caps(void) {
- // This function should actually be a no-op. There is no way to adjust any
of
-@@ -32,7 +32,7 @@ static int arm_get_cpu_caps(void) {
+@@ -178,7 +178,31 @@ static int arm_get_cpu_caps(void) {
return flags;
}
--#elif defined(__APPLE__) // end !CONFIG_RUNTIME_CPU_DETECT
-+#elif defined(__APPLE__) // end !CONFIG_RUNTIME_CPU_DETECT || __OpenBSD__
-
- // sysctlbyname() parameter documentation for instruction set characteristics:
- //
https://developer.apple.com/documentation/kernel/1387446-sysctlbyname/determining_instruction_set_characteristics
+-#else // end __Fuchsia__
++#elif defined(__OpenBSD__) // end __Fuchsia__
++
++#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 isar0 = 0;
++ size_t len = sizeof(isar0);
++
++ flags |= HAS_NEON; // Neon is mandatory in Armv8.0-A.
++
++ if (sysctl(isar0_mib, 2, &isar0, &len, NULL, 0) != -1) {
++ if (ID_AA64ISAR0_CRC32(isar0) >= ID_AA64ISAR0_CRC32_BASE)
++ flags |= HAS_ARM_CRC32;
++ if (ID_AA64ISAR0_DP(isar0) >= ID_AA64ISAR0_DP_IMPL)
++ flags |= HAS_NEON_DOTPROD;
++ }
++
++ return flags;
++}
++
++#else // end __OpenBSD__
+ #error \
+ "Runtime CPU detection selected, but no CPU detection method " \
+ "available for your platform. Rerun cmake with -DCONFIG_RUNTIME_CPU_DETECT=0."
Index: libvpx/Makefile
===================================================================
RCS file: /cvs/ports/multimedia/libvpx/Makefile,v
retrieving revision 1.57
diff -u -p -u -p -r1.57 Makefile
--- libvpx/Makefile 29 Feb 2024 09:43:31 -0000 1.57
+++ libvpx/Makefile 23 May 2024 05:24:58 -0000
@@ -3,6 +3,7 @@ COMMENT= Google VP8/VP9 video codec
GH_ACCOUNT= webmproject
GH_PROJECT= libvpx
GH_TAGNAME= v1.14.0
+REVISION= 0
EPOCH= 0
CATEGORIES= multimedia
Index: libvpx/patches/patch-vpx_ports_aarch64_cpudetect_c
===================================================================
RCS file:
/cvs/ports/multimedia/libvpx/patches/patch-vpx_ports_aarch64_cpudetect_c,v
retrieving revision 1.1
diff -u -p -u -p -r1.1 patch-vpx_ports_aarch64_cpudetect_c
--- libvpx/patches/patch-vpx_ports_aarch64_cpudetect_c 29 Feb 2024 09:43:31
-0000 1.1
+++ libvpx/patches/patch-vpx_ports_aarch64_cpudetect_c 23 May 2024 05:24:58
-0000
@@ -1,23 +1,36 @@
-Allow ARM CPU runtime detection code to build on OpenBSD.
+Add AArch64 CPU feature detection support for OpenBSD.
Index: vpx_ports/aarch64_cpudetect.c
--- vpx_ports/aarch64_cpudetect.c.orig
+++ vpx_ports/aarch64_cpudetect.c
-@@ -15,7 +15,7 @@
- #include <sys/sysctl.h>
- #endif
-
--#if !CONFIG_RUNTIME_CPU_DETECT
-+#if !CONFIG_RUNTIME_CPU_DETECT || defined(__OpenBSD__)
-
- static int arm_get_cpu_caps(void) {
- // This function should actually be a no-op. There is no way to adjust any
of
-@@ -28,7 +28,7 @@ static int arm_get_cpu_caps(void) {
+@@ -170,7 +170,29 @@ static int arm_get_cpu_caps(void) {
return flags;
}
--#elif defined(__APPLE__) // end !CONFIG_RUNTIME_CPU_DETECT
-+#elif defined(__APPLE__) // end !CONFIG_RUNTIME_CPU_DETECT || __OpenBSD__
-
- // sysctlbyname() parameter documentation for instruction set characteristics:
- //
https://developer.apple.com/documentation/kernel/1387446-sysctlbyname/determining_instruction_set_characteristics
+-#else // end __Fuchsia__
++#elif defined(__OpenBSD__) // end __Fuchsia__
++
++#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 isar0 = 0;
++ size_t len = sizeof(isar0);
++
++ flags |= HAS_NEON; // Neon is mandatory in Armv8.0-A.
++
++ if (sysctl(isar0_mib, 2, &isar0, &len, NULL, 0) != -1) {
++ if (ID_AA64ISAR0_DP(isar0) >= ID_AA64ISAR0_DP_IMPL)
++ flags |= HAS_NEON_DOTPROD;
++ }
++
++ return flags;
++}
++
++#else // end __OpenBSD__
+ #error \
+ "Runtime CPU detection selected, but no CPU detection method available" \
+ "for your platform. Rerun configure with --disable-runtime-cpu-detect."
