Internal Error: Sub-system: QIS, File: /quartus/synth/qis/qis_primitive_mapper.cpp, Line: 3663

Description

Due to a problem in the  Intel® Quartus® Prime Pro Edition software, you may see this internal error when you instantiate any of the following primitives: ALT_INBUF, ALT_OUTBUF, ALT_IOBUF, ALT_BIDIR inside a VHDL 'For Generated' loop.

Resolution

To work around this problem, unroll the 'For Generate' loop and individually instantiate each of the primitives required as below:

'For Generate' primitives instantiation:

inbuf_diff_gen :

for j in 0 to 2 generate  
inbuf_diff_gen : alt_inbuf_diff

    port map (

    i    => rx_data_p(j),

    ibar => rx_data_n(j),

    o    => rx_serial_data(j));

end generate;

Individually instantiated primitives:

    port map (

    i    => rx_data_p(0),

    ibar => rx_data_n(0),

    o    => rx_serial_data(0));

  
inbuf_diff_inst_1 : alt_inbuf_diff

 port map (

 i    => rx_data_p(1),

 ibar => rx_data_n(1),

 o    => rx_serial_data(1));

  
inbuf_diff_inst_2 : alt_inbuf_diff

 port map (

 i    => rx_data_p(2),

 ibar => rx_data_n(2),

 o    => rx_serial_data(2));

This problem has been fixed beginning with the Intel® Quartus® Prime Pro Edition software version 18.0