Hi sstrell,
The physical location constrains are applied to those registers before this error appear. The FF module is as following code:
module primitive_ff (
input wire s,
input wire clk,
input wire clr,
input wire ena,
output wire q
);
cyclone10gx_ff myff (
.d(s),
.clk(clk ),
.clrn(),
.aload(),
.sclr(clr),
.sload(),
.asdata(),
.ena(ena),
.devclrn(),
.devpor(),
.q (q)
);
endmodule
If all 4 registers of single ALM use same enable signal, the project can pass thru full compilation. However, if odd and even use different enable signal the project can't pass thru Fit.
For the FF physical locaton constrains are as following:
set_location_assignment FF_X55_Y19_N1 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[20].myffa|myff"
set_location_assignment FF_X55_Y19_N4 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[21].myffa|myff"
set_location_assignment FF_X55_Y19_N7 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[22].myffa|myff"
set_location_assignment FF_X55_Y19_N10 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[23].myffa|myff"
set_location_assignment FF_X55_Y19_N13 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[24].myffa|myff"
set_location_assignment FF_X55_Y19_N16 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[25].myffa|myff"
set_location_assignment FF_X55_Y19_N19 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[26].myffa|myff"
set_location_assignment FF_X55_Y19_N22 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[27].myffa|myff"
set_location_assignment FF_X55_Y19_N25 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[28].myffa|myff"
set_location_assignment FF_X55_Y19_N28 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[29].myffa|myff"
set_location_assignment FF_X55_Y19_N31 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[30].myffa|myff"
set_location_assignment FF_X55_Y19_N34 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[31].myffa|myff"
set_location_assignment FF_X55_Y19_N37 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[32].myffa|myff"
set_location_assignment FF_X55_Y19_N40 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[33].myffa|myff"
set_location_assignment FF_X55_Y19_N43 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[34].myffa|myff"
set_location_assignment FF_X55_Y19_N46 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[35].myffa|myff"
set_location_assignment FF_X55_Y19_N49 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[36].myffa|myff"
set_location_assignment FF_X55_Y19_N52 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[37].myffa|myff"
set_location_assignment FF_X55_Y19_N55 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[38].myffa|myff"
set_location_assignment FF_X55_Y19_N58 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[39].myffa|myff"
set_location_assignment FF_X55_Y19_N2 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[20].myffb|myff"
set_location_assignment FF_X55_Y19_N5 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[21].myffb|myff"
set_location_assignment FF_X55_Y19_N8 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[22].myffb|myff"
set_location_assignment FF_X55_Y19_N11 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[23].myffb|myff"
set_location_assignment FF_X55_Y19_N14 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[24].myffb|myff"
set_location_assignment FF_X55_Y19_N17 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[25].myffb|myff"
set_location_assignment FF_X55_Y19_N20 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[26].myffb|myff"
set_location_assignment FF_X55_Y19_N23 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[27].myffb|myff"
set_location_assignment FF_X55_Y19_N26 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[28].myffb|myff"
set_location_assignment FF_X55_Y19_N29 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[29].myffb|myff"
set_location_assignment FF_X55_Y19_N32 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[30].myffb|myff"
set_location_assignment FF_X55_Y19_N35 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[31].myffb|myff"
set_location_assignment FF_X55_Y19_N38 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[32].myffb|myff"
set_location_assignment FF_X55_Y19_N41 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[33].myffb|myff"
set_location_assignment FF_X55_Y19_N44 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[34].myffb|myff"
set_location_assignment FF_X55_Y19_N47 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[35].myffb|myff"
set_location_assignment FF_X55_Y19_N50 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[36].myffb|myff"
set_location_assignment FF_X55_Y19_N53 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[37].myffb|myff"
set_location_assignment FF_X55_Y19_N56 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[38].myffb|myff"
set_location_assignment FF_X55_Y19_N59 -to "inst3|u_TDL_CC_DualReg_Top|u_CarryChainDualRegInC10GX|gen[39].myffb|myff"
As above constrains, all single LAB's 40 registers are constrain to corresponding logic nodes. They are grouped to two sets. One is myffa, another one is myffb. If both myffa and myffb use same enable signal, the project can pass thru full compliation. When myffa use ENa and myffb use ENb the project can't pass FIT stage and get the errors presented as the first post.
BTW, enable is generated as :
enable <= ena or enb;
So enable just merger ena and enb. I doubt that the registers inside same LAB can only use same single enable port?
Occasional Contributor
