doc: clarify testpmd guide for flow API

The description of prefix for mask creation was misunderstood.
I updated the description, so it is clearly understood which
mask will be created by a certain prefix.

Signed-off-by: Dekel Peled <dekelp@mellanox.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/doc/guides/testpmd_app_ug/testpmd_funcs.rst b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
index e3c4606..056f8bb 100644 (file)
--- a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
+++ b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
@@ -3502,7 +3502,7 @@ accordingly. Possible assignment tokens are:
 - ``spec``: match value according to configured bit-mask.
 - ``last``: specify upper bound to establish a range.
 - ``mask``: specify bit-mask with relevant bits set to one.
-- ``prefix``: generate bit-mask from a prefix length.
+- ``prefix``: generate bit-mask with <prefix-length> most-significant bits set to one.
 
 These yield identical results::