warning: Some modules have no timescale. This may cause
       : confusing timing results.	Affected modules are:
       :   -- module top_default declared here: ./ivltests/resetall.v:1
       :   -- module top_resetall declared here: ./ivltests/resetall.v:20
Time scale of (top_default) is 1s / 1s
Time scale of (top_timescale) is 1ns / 1ns
Time scale of (top_resetall) is 1s / 1s
Time scale of (top_timescale2) is 1ms / 1ms
Time scale of (top_timescale3) is 1us / 1us