Refactor PPC CPU feature detection

source/common/cpu.cpp

@@ -471,14 +471,16 @@ uint32_t cpu_detect( bool benableavx512 )
 }
 
 #elif X265_ARCH_POWER8
+#include "ppc/cpu.h"
 
 uint32_t cpu_detect(bool benableavx512)
 {
-#if HAVE_ALTIVEC
-    return X265_CPU_ALTIVEC;
-#else
-    return 0;
-#endif
+    (void)benableavx512;
+    uint32_t flags = 0;
+
+    flags = ppc_cpu_detect();
+
+    return flags;
 }
 
 #else // if X265_ARCH_POWER8

source/common/ppc/cpu.h

@@ -0,0 +1,39 @@
+/*****************************************************************************
+ * Copyright (C) 2026 MulticoreWare, Inc
+ *
+ * Authors: Brad Smith <brad@comstyle.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
+ *
+ * This program is also available under a commercial proprietary license.
+ * For more information, contact us at license @ x265.com.
+ *****************************************************************************/
+
+#ifndef X265_COMMON_PPC_CPU_H
+#define X265_COMMON_PPC_CPU_H
+
+#include "x265.h"
+
+static inline uint32_t ppc_cpu_detect()
+{
+    uint32_t flags = 0;
+
+#if HAVE_ALTIVEC
+    flags |= X265_CPU_ALTIVEC;
+#endif
+    return flags;
+}
+
+#endif // ifndef X265_COMMON_PPC_CPU_H