Core: build on aarch64 with gcc (#24216)

* build on aarch64 with gcc

* Core/aarch64: readability on preprocessor macro

* Core/aarch64: TC C++ codestyle adjustment

(cherry picked from commit ce449f6b53)

cmake/compiler/gcc/settings.cmake

@@ -16,11 +16,13 @@ if(PLATFORM EQUAL 32)
       -msse2
       -mfpmath=sse)
 endif()
-target_compile_definitions(trinity-compile-option-interface
-  INTERFACE
-    -DHAVE_SSE2
-    -D__SSE2__)
-message(STATUS "GCC: SFMT enabled, SSE2 flags forced")
+if(NOT CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64")
+  target_compile_definitions(trinity-compile-option-interface
+    INTERFACE
+      -DHAVE_SSE2
+      -D__SSE2__)
+  message(STATUS "GCC: SFMT enabled, SSE2 flags forced")
+endif()
 
 if( WITH_WARNINGS )
   target_compile_options(trinity-warning-interface

src/common/Utilities/SFMTRand.cpp

@@ -20,13 +20,43 @@
 #include <array>
 #include <functional>
 #include <random>
-#if defined(__aarch64__)
-#include <mm_malloc.h>
-#else
-#include <emmintrin.h>
-#endif
 #include <ctime>
 
+#if defined(__aarch64__)
+    #if defined(__clang__)
+        #include <mm_malloc.h>
+    #elif defined(__GNUC__)
+        static __inline__ void *__attribute__((__always_inline__, __nodebug__, __malloc__))
+        _mm_malloc(size_t __size, size_t __align)
+        {
+            if (__align == 1)
+            {
+                return malloc(__size);
+            }
+
+            if (!(__align & (__align - 1)) && __align < sizeof(void *))
+                __align = sizeof(void *);
+
+            void *__mallocedMemory;
+
+            if (posix_memalign(&__mallocedMemory, __align, __size))
+                return NULL;
+
+            return __mallocedMemory;
+        }
+
+        static __inline__ void __attribute__((__always_inline__, __nodebug__))
+        _mm_free(void *__p)
+        {
+            free(__p);
+        }
+    #else
+        #error aarch64 only on clang and gcc
+    #endif
+#else
+    #include <emmintrin.h>
+#endif
+
 SFMTRand::SFMTRand()
 {
     std::random_device dev;