apple device always has armv8.2 dot (#2963)

cmake/ncnn_add_layer.cmake

@@ -154,7 +154,7 @@ macro(ncnn_add_layer class)
         endif()
     endif()
 
-    if(NCNN_RUNTIME_CPU AND NCNN_ARM82 AND ((IOS AND CMAKE_OSX_ARCHITECTURES MATCHES "arm64") OR (APPLE AND CMAKE_OSX_ARCHITECTURES MATCHES "arm64") OR (CMAKE_SYSTEM_PROCESSOR MATCHES "^(arm64|aarch64)")))
+    if(NCNN_RUNTIME_CPU AND NCNN_ARM82 AND (NOT IOS) AND (NOT APPLE) AND (CMAKE_SYSTEM_PROCESSOR MATCHES "^(arm64|aarch64)"))
         # enable armv8.2a+fp16
         set(NCNN_ARM_HEADER ${CMAKE_CURRENT_SOURCE_DIR}/layer/${NCNN_TARGET_ARCH}/${name}_${NCNN_TARGET_ARCH}.h)
         set(NCNN_ARM_SOURCE ${CMAKE_CURRENT_SOURCE_DIR}/layer/${NCNN_TARGET_ARCH}/${name}_${NCNN_TARGET_ARCH}.cpp)

src/layer.cpp

@@ -208,11 +208,11 @@ static const layer_registry_entry layer_registry_avx2[] = {
 };
 #endif // NCNN_RUNTIME_CPU && NCNN_AVX2
 
-#if NCNN_RUNTIME_CPU && NCNN_ARM82
+#if NCNN_RUNTIME_CPU && NCNN_ARM82 && !__APPLE__
 static const layer_registry_entry layer_registry_arm82[] = {
 #include "layer_registry_arm82.h"
 };
-#endif // NCNN_RUNTIME_CPU && NCNN_ARM82
+#endif // NCNN_RUNTIME_CPU && NCNN_ARM82 && !__APPLE__
 
 #if NCNN_RUNTIME_CPU && NCNN_ARM82DOT
 static const layer_registry_entry layer_registry_arm82dot[] = {
@@ -272,13 +272,13 @@ Layer* create_layer(int index)
     }
     else
 #endif // NCNN_RUNTIME_CPU && NCNN_ARM82DOT
-#if NCNN_RUNTIME_CPU && NCNN_ARM82
+#if NCNN_RUNTIME_CPU && NCNN_ARM82 && !__APPLE__
     if (ncnn::cpu_support_arm_asimdhp())
     {
         layer_creator = layer_registry_arm82[index].creator;
     }
     else
-#endif // NCNN_RUNTIME_CPU && NCNN_ARM82
+#endif // NCNN_RUNTIME_CPU && NCNN_ARM82 && !__APPLE__
 #if NCNN_RUNTIME_CPU && NCNN_RVV
     if (ncnn::cpu_support_riscv_v())
     {