"vfadd_vv" case without e16 when add Zvfh extension

I noticed that the README states Zvfh extension is already supported, but I couldn't find the configuration for e16 in the generated assembly files.
Did I do something wrong?

version: d88736d08d7aead7bd3cddc09f64bd5050c7b9e8
Makefile: MARCH = rv${XLEN}gcv_zfh_zvfh
command: make all --environment-overrides PATTERN='^vfadd.*.vv'

Start with the README's Zvfh support claim and the Makefile setting MARCH=rv${XLEN}gcv_zfh_zvfh. Run the reported make command and inspect the generated assembly for the vfadd.*.vv pattern, then compare the available configuration with the expected e16 case. Done means the missing case is explained and, if it is a generator defect, covered by the appropriate generated output.

Written by the indexing model from the issue text.