x86: move MANGLE() and related macros to libavutil/x86/asm.h

These x86-specific macros do not belong in generic code.
Signed-off-by: Mans Rullgard <mans@mansr.com>

libavutil/internal.h

@@ -92,18 +92,6 @@ struct AVDictionary {
 #    define offsetof(T, F) ((unsigned int)((char *)&((T *)0)->F))
 #endif
 
-/* Use to export labels from asm. */
-#define LABEL_MANGLE(a) EXTERN_PREFIX #a
-
-// Use rip-relative addressing if compiling PIC code on x86-64.
-#if ARCH_X86_64 && defined(PIC)
-#    define LOCAL_MANGLE(a) #a "(%%rip)"
-#else
-#    define LOCAL_MANGLE(a) #a
-#endif
-
-#define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a)
-
 /* debug stuff */
 
 #define av_abort()      do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)

libavutil/x86/asm.h

@@ -95,4 +95,16 @@ typedef int x86_reg;
 #    define XMM_CLOBBERS_ONLY(...)
 #endif
 
+/* Use to export labels from asm. */
+#define LABEL_MANGLE(a) EXTERN_PREFIX #a
+
+// Use rip-relative addressing if compiling PIC code on x86-64.
+#if ARCH_X86_64 && defined(PIC)
+#    define LOCAL_MANGLE(a) #a "(%%rip)"
+#else
+#    define LOCAL_MANGLE(a) #a
+#endif
+
+#define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a)
+
 #endif /* AVUTIL_X86_ASM_H */