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Detailed utilization report according to functional modes #1133

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@tpagarani

Description

@tpagarani

Is your feature request related to a problem? Please describe.
Current utilization reports do not give details about how each CLB is utilized.

Describe the solution you'd like
each CLB can be used in either 6-LUT mode or 2-LUT5 mode or an ADDER mode.
Also each FF can be used in LUT+FF mode or Direct FF. The report file should include how many CLBs are used in which mode
This information can be derived from VPR log file e.g. in following report
Pb types usage...

clb : 92
fle : 711
ble6 : 81
lut6 : 81
lut : 81
ff : 6
DFFSRE : 6
lut5inter : 630
ble5 : 1090
flut5 : 1082
lut5 : 522
lut : 522
ff : 652
DFFSRE : 652
soft_adder : 8
adder : 8
lut4 : 2
lut : 2
adder_carry : 8

Describe alternatives you've considered
Currently we have to parse the VPR and Yosys log file to get these details

Additional context
Add any other context or screenshots about the feature request here.

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