General Description: When compiling the Synopsys libraries for Virtex multiplier, the following warning(s) appear:
"Warning: Unable to resolve reference 'xdw_mult_ss_ma2_2bit_8_8_0_2_0.model.virtex' in 'xdw_mult_ss_A_width8_B_width8.db:xdw_mult_ss_A_width8_B_width8_xdw_mult_ss_bt_8_8_0'. (LINK-5)"
This occurs after the following command:
Optimization Complete --------------------- Transferring design 'xdw_mult_ss_A_width8_B_width8' to database 'xdw_mult_ss_A_width8_B_width8.db' Current design is 'xdw_mult_ss_A_width8_B_width8'. 1 link Linking design: xdw_mult_ss_A_width8_B_width8 Using the following designs and libraries: xdw_mult_ss_A_width8_B_width8, xdw_mult_ss_A_width8_B_width8_xdw_mult_ss_bt_8_8_0, : :
This happens in Synopsys versions 1999.05-4, 1999.10, and 2000.05, and the problem occurs when signed multiplication takes place. This problem is fixed in version 2000.11.
The only workarounds available are:
- Do not use signed multiplication. - Use version 1999.05-3 or earlier. - Use FPGA Compiler II.