Solved: What these primitives are coming from and is there any manual/reference for these primitives?

Hi,

The altera_syncram_derived seems to be a bug in the RTL simulation model in the past, try to rebuild the project in the latest Quartus version. Use altera_syncram as an entry instead.

The other primitives can be found in the sub-directories of Quartus directory > libraries > vhdl.

The "scfifo" and "dcfifo" can be found in the library altera_mf_components.vhd.

Whereas the "fourteennm" and "twentynm" primitives are in the fourteennm_components.vhd and twentynm_components.vhd library respectively.

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