Add Arm RTCD for OpenBSD

celt/arm/armcpu.c

@@ -191,7 +191,7 @@ static opus_uint32 opus_cpu_capabilities(void)
   return flags;
 }
 
-#elif defined(__FreeBSD__)
+#elif defined(HAVE_ELF_AUX_INFO)
 #include <sys/auxv.h>
 
 static opus_uint32 opus_cpu_capabilities(void)
@@ -239,6 +239,38 @@ static opus_uint32 opus_cpu_capabilities(void)
   return (flags);
 }
 
+#elif defined(__OpenBSD__)
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#include <machine/armreg.h>
+#include <machine/cpu.h>
+
+static opus_uint32 opus_cpu_capabilities(void)
+{
+  opus_uint32 flags = 0;
+
+#if defined(OPUS_ARM_MAY_HAVE_DOTPROD) && defined(CPU_ID_AA64ISAR0)
+  const int isar0_mib[] = { CTL_MACHDEP, CPU_ID_AA64ISAR0 };
+  uint64_t isar0;
+  size_t len = sizeof(isar0);
+
+  if (sysctl(isar0_mib, 2, &isar0, &len, NULL, 0) != -1)
+  {
+    if (ID_AA64ISAR0_DP(isar0) >= ID_AA64ISAR0_DP_IMPL)
+      flags |= OPUS_CPU_ARM_DOTPROD_FLAG;
+  }
+#endif
+
+#if defined(OPUS_ARM_PRESUME_NEON_INTR) \
+ || defined(OPUS_ARM_PRESUME_AARCH64_NEON_INTR)
+  flags |= OPUS_CPU_ARM_EDSP_FLAG | OPUS_CPU_ARM_MEDIA_FLAG | OPUS_CPU_ARM_NEON_FLAG;
+# if defined(OPUS_ARM_PRESUME_DOTPROD)
+  flags |= OPUS_CPU_ARM_DOTPROD_FLAG;
+# endif
+#endif
+  return flags;
+}
+
 #else
 /* The feature registers which can tell us what the processor supports are
  * accessible in priveleged modes only, so we can't have a general user-space

configure.ac

@@ -1032,7 +1032,7 @@ AC_CHECK_FUNCS([lrintf])
 AC_CHECK_FUNCS([lrint])
 LIBS="$saved_LIBS"
 
-AC_CHECK_FUNCS([__malloc_hook])
+AC_CHECK_FUNCS([__malloc_hook elf_aux_info])
 
 AC_SUBST([PC_BUILD])
 

meson.build

@@ -83,6 +83,7 @@ libm = cc.find_library('m', required : false)
 opus_conf.set('HAVE_LRINTF', cc.has_function('lrintf', prefix: '#include <math.h>', dependencies: libm))
 opus_conf.set('HAVE_LRINT', cc.has_function('lrint', prefix: '#include <math.h>', dependencies: libm))
 opus_conf.set('HAVE___MALLOC_HOOK', cc.has_function('__malloc_hook', prefix: '#include <malloc.h>'))
+opus_conf.set('HAVE_ELF_AUX_INFO', cc.has_function('elf_aux_info', prefix: '#include <sys/auxv.h>'))
 opus_conf.set('HAVE_STDINT_H', cc.check_header('stdint.h'))
 
 # Check for restrict keyword