555lin
Junior Member level 3
When I run synthesis using Xilinx ISE's XST i get the warnings:
PACKER Warning: Lut gost_top_SM1out<1>lut driving carry gost_top_SM1out<1>cy can not be packed with the carry due to conflict with the common signal requirement between the LUT inputs and the Carry DI/MAND pins. This would result in an extra LUT for a feedthrough.
PACKER Warning: Lut gost_top_SM1out<2>lut driving carry gost_top_SM1out<2>cy can not be packed with the carry due to conflict with the common signal requirement between the LUT inputs and the Carry DI/MAND pins. This would result in an extra LUT for a feedthrough.
.........
What results in this warning and what should I do to eliminate it?
PACKER Warning: Lut gost_top_SM1out<1>lut driving carry gost_top_SM1out<1>cy can not be packed with the carry due to conflict with the common signal requirement between the LUT inputs and the Carry DI/MAND pins. This would result in an extra LUT for a feedthrough.
PACKER Warning: Lut gost_top_SM1out<2>lut driving carry gost_top_SM1out<2>cy can not be packed with the carry due to conflict with the common signal requirement between the LUT inputs and the Carry DI/MAND pins. This would result in an extra LUT for a feedthrough.
.........
What results in this warning and what should I do to eliminate it?
