sdc: fix invalid start point for path

Signed-off-by: Øyvind Harboe <[email protected]>

Author: oharboe

flow/platforms/asap7/constraints.sdc

@@ -70,15 +70,14 @@ set clk_port [get_ports $clk_port_name]
 create_clock -period $clk_period -waveform [list 0 [expr $clk_period / 2]] -name $clk_name $clk_port
 
 set non_clk_inputs [all_inputs -no_clocks]
-set all_register_outputs [get_pins -of_objects [all_registers] -filter {direction == output}]
 
 # Optimization targets: overconstrain by default and
 # leave refinements to a more design specific constraints.sdc file.
 #
 # Minimum time for io-io, io-reg, reg-io paths in macro is on
 # the order of 80ps for a small macro on ASAP7.
 set_max_delay [expr { [info exists in2reg_max] ? $in2reg_max : 80 }] -from $non_clk_inputs -to [all_registers]
-set_max_delay [expr { [info exists reg2out_max] ? $reg2out_max : 80 }] -from $all_register_outputs -to [all_outputs]
+set_max_delay [expr { [info exists reg2out_max] ? $reg2out_max : 80 }] -from [all_registers] -to [all_outputs]
 set_max_delay [expr { [info exists in2out_max] ? $in2out_max : 80 }] -from $non_clk_inputs -to [all_outputs]
 
 # This allows us to view the different groups