Add support for multiple microarchitectures in single binary
* compiler -march= parameter is changed from native to corei7
so code is always genereted with instructions which are available
on the Nehalem microarchitecture (up to SSE4.2)
* compiler -mtune= parameter is added so code is optimized for
corei7-avx which equals to Sandy Bridge microarchitecture
* set of macros is added which allows run-time detection of available
cpu instructions (e.g. clib_cpu_supports_avx())
* set of macros is added which allows us to clone graph node funcitons
where cloned function is optmized for different microarchitecture
Those macros are using following attributes:
__attribute__((flatten))
__attribute__((target("arch=core-avx2)))
I.e. If applied to foo_node_fn() macro will generate cloned
functions foo_node_fn_avx2() and foo_node_fn_avx512() (future)
It will also generate function void * foo_node_fn_multiarch_select()
which detects available instruction set and returns pointer to the
best matching function clone.
Change-Id: I2dce0ac92a5ede95fcb56f47f3d1f3c4c040bac0
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/vnet/vnet/l2/l2_flood.c b/vnet/vnet/l2/l2_flood.c
index ca8c171..9f71677 100644
--- a/vnet/vnet/l2/l2_flood.c
+++ b/vnet/vnet/l2/l2_flood.c
@@ -442,6 +442,8 @@
},
};
+VLIB_NODE_FUNCTION_MULTIARCH (l2flood_node, l2flood_node_fn)
+
clib_error_t *l2flood_init (vlib_main_t *vm)
{
l2flood_main_t * mp = &l2flood_main;