X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvppinfra%2Fcpu.h;h=c636cf8639c3c4645e5a6d24894ac8e8f250dfb2;hb=983cc7da8566fcbe2647ed2d3921e7683bd8d325;hp=110815c9f87b8ec780db85ce9dde17295782be65;hpb=61f702bdd09e569bf9b3ef05d2040de5540fb8db;p=vpp.git

diff --git a/src/vppinfra/cpu.h b/src/vppinfra/cpu.h
index 110815c9f87..c636cf8639c 100644
--- a/src/vppinfra/cpu.h
+++ b/src/vppinfra/cpu.h
@@ -190,6 +190,35 @@ clib_cpu_march_priority_avx2 ()
 #endif
 #endif /* included_clib_cpu_h */
 
+#define CLIB_MARCH_FN_CONSTRUCTOR(fn)					\
+static void __clib_constructor 						\
+CLIB_MARCH_SFX(fn ## _march_constructor) (void)				\
+{									\
+  if (CLIB_MARCH_FN_PRIORITY() > fn ## _selected_priority)		\
+    {									\
+      fn ## _selected = & CLIB_MARCH_SFX (fn ## _ma);			\
+      fn ## _selected_priority = CLIB_MARCH_FN_PRIORITY();		\
+    }									\
+}									\
+
+#ifndef CLIB_MARCH_VARIANT
+#define CLIB_MARCH_FN(fn, rtype, _args...)				\
+  static rtype CLIB_CPU_OPTIMIZED CLIB_MARCH_SFX (fn ## _ma)(_args);	\
+  rtype (*fn ## _selected) (_args) = & CLIB_MARCH_SFX (fn ## _ma);	\
+  int fn ## _selected_priority = 0;					\
+  static inline rtype CLIB_CPU_OPTIMIZED 				\
+  CLIB_MARCH_SFX (fn ## _ma)(_args)
+#else
+#define CLIB_MARCH_FN(fn, rtype, _args...)				\
+  static rtype CLIB_CPU_OPTIMIZED CLIB_MARCH_SFX (fn ## _ma)(_args);	\
+  extern int (*fn ## _selected) (_args);				\
+  extern int fn ## _selected_priority;					\
+  CLIB_MARCH_FN_CONSTRUCTOR (fn)					\
+  static rtype CLIB_CPU_OPTIMIZED CLIB_MARCH_SFX (fn ## _ma)(_args)
+#endif
+
+#define CLIB_MARCH_FN_SELECT(fn) (* fn ## _selected)
+
 format_function_t format_cpu_uarch;
 format_function_t format_cpu_model_name;
 format_function_t format_cpu_flags;