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gen_pb_or.tcl
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gen_pb_or.tcl
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########################## Details to use this script ##########################
# Author: Sayak Kundu email: sakundu@ucsd.edu
# Date: 11-22-2022
# This script converts LEF / DEF format to Protobuf format using OpenROAD.
# Follow the below steps to generate protobuf netlist from LEF / DEF in the
# OpenROAD shell:
# 1. read_lef <tech lef>
# 2. read_lef <standard cell and macro lef one by one>
# 3. read_def <design def file>
# 4. source <This script file>
# 5. gen_pb_netlist <path of the output protobuf netlist>
################################################################################
#### Print the design header ####
proc print_header { fp } {
set design [[ord::get_db_block] getName]
set user [exec whoami]
set date [exec date]
set run_dir [exec pwd]
set canvas_width [ord::dbu_to_microns [[[ord::get_db_block] getCoreArea] dx]]
set canvas_height [ord::dbu_to_microns [[[ord::get_db_block] getCoreArea] dy]]
puts $fp "# User: $user"
puts $fp "# Date: $date"
puts $fp "# Run area: $run_dir"
puts $fp "# Block : $design"
puts $fp "# FP bbox: {0.0 0.0} {$canvas_width $canvas_height}"
## Add dummy Column and Row info ##
puts $fp "# Columns : 10 Rows : 10"
}
#### Print helper ####
proc print_placeholder { fp key value } {
puts $fp " attr {"
puts $fp " key: \"$key\""
puts $fp " value {"
puts $fp " placeholder: \"$value\""
puts $fp " }"
puts $fp " }"
}
proc print_float { fp key value } {
puts $fp " attr {"
puts $fp " key: \"$key\""
puts $fp " value {"
puts $fp " f: $value"
puts $fp " }"
puts $fp " }"
}
### Helper to convert Orientation format ###
proc get_orient { tmp_orient } {
set orient "N"
if { $tmp_orient == "R0"} {
set orient "N"
} elseif { $tmp_orient == "R180" } {
set orient "S"
} elseif { $tmp_orient == "R90" } {
set orient "W"
} elseif { $tmp_orient == "R270" } {
set orient "E"
} elseif { $tmp_orient == "MY" } {
set oreint "FN"
} elseif { $tmp_orient == "MX" } {
set oreint "FS"
} elseif { $tmp_orient == "MX90" } {
set orient "FW"
} elseif { $tmp_orient == "MY90" } {
set orient "FE"
}
return $orient
}
#### Procedure to print the sinks ####
proc print_net { net_ptr fp } {
### Print Terms ###
foreach bterm [$net_ptr getBTerms] {
set type [$bterm getIoType]
if { $type == "OUTPUT" } {
set btermName [$bterm getName]
puts $fp " input: \"${btermName}\""
}
}
### For each inst pins ###
foreach iterm [$net_ptr getITerms] {
if { [$iterm isInputSignal] } {
set inst [ $iterm getInst ]
set isBlock [ $inst isBlock]
set instName [$inst getName]
if { $isBlock } {
set pinName [[$iterm getMTerm] getName]
puts $fp " input: \"${instName}\/${pinName}\""
} else {
puts $fp " input: \"${instName}\""
}
}
}
}
### Procedure Find Side ###
proc find_bterm_side { pt_x pt_y dx dy} {
set cond1 [expr $pt_x - $pt_y]
set cond2 [expr ($pt_x/$dx) + ($pt_y/$dy) - 1]
if { $cond1 > 0 } {
if { $cond2 > 0 } {
return "right"
} else {
return "bottom"
}
} else {
if { $cond2 > 0 } {
return "top"
} else {
return "left"
}
}
}
### Procedure Find Mid Point ###
proc find_mid_point { rect } {
set xmin [$rect xMin]
set ymin [$rect yMin]
set dx [$rect dx]
set dy [$rect dy]
set pt_x [expr $xmin + $dx/2]
set pt_y [expr $ymin + $dy/2]
return [list $pt_x $pt_y]
}
proc find_mid_point_bbox { rect } {
set xmin [$rect xMin]
set ymin [$rect yMin]
set dx [$rect getDX]
set dy [$rect getDY]
set pt_x [expr $xmin + $dx/2]
set pt_y [expr $ymin + $dy/2]
return [list $pt_x $pt_y]
}
#### Procedure to write Ports ####
proc write_node_port { port_ptr fp } {
puts $fp "node {"
set name [$port_ptr getName]
puts $fp " name: \"${name}\""
if { [$port_ptr getIoType] == "INPUT" } {
set net_ptr [$port_ptr getNet]
print_net $net_ptr $fp
}
### Attribute: type ###
print_placeholder $fp "type" "port"
### Adjusting Core and Die ###
set term_box [$port_ptr getBBox]
set mid_pts [find_mid_point $term_box]
set X [ord::dbu_to_microns [lindex $mid_pts 0]]
set Y [ord::dbu_to_microns [lindex $mid_pts 1]]
set dx [ord::dbu_to_microns [[[ord::get_db_block] getDieArea] dx]]
set dy [ord::dbu_to_microns [[[ord::get_db_block] getDieArea] dy]]
set die_llx [ord::dbu_to_microns [[[ord::get_db_block] getDieArea] xMin]]
set die_lly [ord::dbu_to_microns [[[ord::get_db_block] getDieArea] yMin]]
set side [find_bterm_side [expr $X - $die_llx] [expr $Y - $die_lly]\
$dx $dy]
### Attribute: X, Y and Side ###
print_placeholder $fp "side" $side
set origin_x [ord::dbu_to_microns [[[ord::get_db_block] getCoreArea] xMin]]
set origin_y [ord::dbu_to_microns [[[ord::get_db_block] getCoreArea] yMin]]
### Attribute: X ###
if {$side == "top" || $side == "bottom"} {
set X [expr $X - $origin_x]
} elseif { $side == "right" } {
set X [expr $X - 2*$origin_x]
}
print_float $fp "x" $X
### Attribute: Y ###
if {$side == "left" || $side == "right"} {
set Y [expr $Y - $origin_y]
} elseif { $side == "top" } {
set Y [expr $Y - 2*$origin_y]
}
print_float $fp "y" $Y
puts $fp "}"
}
#### Procedure to write Macros ####
proc write_node_macro { macro_ptr fp } {
puts $fp "node {"
set name [$macro_ptr getName]
puts $fp " name: \"${name}\""
### Attribute: ref_name ###
set master_ptr [$macro_ptr getMaster]
set ref_name [$master_ptr getName]
print_placeholder $fp "ref_name" ${ref_name}
### Attribute: Width ###
set width [ord::dbu_to_microns [$master_ptr getWidth]]
print_float $fp "width" $width
### Attribute: Height ###
set height [ord::dbu_to_microns [$master_ptr getHeight]]
print_float $fp "height" $height
### Attribute: type ###
print_placeholder $fp "type" "macro"
set inst_box [$macro_ptr getBBox]
set pts [find_mid_point_bbox $inst_box]
set origin_x [ord::dbu_to_microns [[[ord::get_db_block] getCoreArea] xMin]]
set origin_y [ord::dbu_to_microns [[[ord::get_db_block] getCoreArea] yMin]]
### Attribute: X ###
set X [ord::dbu_to_microns [lindex $pts 0]]
set X [expr $X - $origin_x]
print_float $fp "x" $X
### Attribute: Y ###
set Y [ord::dbu_to_microns [lindex $pts 1]]
set Y [expr $Y - $origin_y]
print_float $fp "y" $Y
### Attribute: Orient ###
set tmp_orient [${macro_ptr} getOrient]
set orient [get_orient $tmp_orient]
print_placeholder $fp "orientation" $orient
puts $fp "}"
}
#### Procedure to Write Macro Pins ####
proc write_node_macro_pin { macro_pin_ptr fp } {
puts $fp "node {"
set macro_ptr [ ${macro_pin_ptr} getInst]
set macro_name [ ${macro_ptr} getName ]
set pin_name [ [${macro_pin_ptr} getMTerm] getName ]
set name "${macro_name}\/${pin_name}"
puts $fp " name: \"${name}\""
### Print all the sinks ###
if { [${macro_pin_ptr} isOutputSignal] } {
set net_ptr [${macro_pin_ptr} getNet]
print_net $net_ptr $fp
}
### Attribute: Macro Name ###
print_placeholder $fp "macro_name" $macro_name
### Attribute: type ###
print_placeholder $fp "type" "macro_pin"
set origin_x [ord::dbu_to_microns [[[ord::get_db_block] getCoreArea] xMin]]
set origin_y [ord::dbu_to_microns [[[ord::get_db_block] getCoreArea] yMin]]
set macro_master [${macro_ptr} getMaster]
set cell_height [${macro_master} getHeight]
set cell_width [ ${macro_master} getWidth]
set mterm_ptr [${macro_pin_ptr} getMTerm]
set pin_box [${mterm_ptr} getBBox]
set pts [find_mid_point $pin_box]
set x_offset [expr [lindex $pts 0] - $cell_width/2]
set y_offset [expr [lindex $pts 1] - $cell_height/2]
### Attribute: x_offset ###
set x_offset [ord::dbu_to_microns $x_offset]
print_float $fp "x_offset" $x_offset
### Attribute: y_offset ###
set y_offset [ord::dbu_to_microns $y_offset]
print_float $fp "y_offset" $y_offset
set pin_box [${macro_pin_ptr} getBBox]
set pts [find_mid_point $pin_box]
### Attribute: X ###
set X [ord::dbu_to_microns [lindex $pts 0]]
set X [expr $X - $origin_x]
print_float $fp "x" $X
### Attribute: Y ###
set Y [ord::dbu_to_microns [lindex $pts 1]]
set Y [expr $Y - $origin_y]
print_float $fp "y" $Y
puts $fp "}"
}
#### Procedure to Write Std-cell ###
proc write_node_stdcell { inst_ptr fp } {
puts $fp "node {"
set name [${inst_ptr} getName]
puts $fp " name: \"${name}\""
### Print all the sinks ###
foreach iterm_ptr [${inst_ptr} getITerms] {
if { [${iterm_ptr} isOutputSignal] } {
set net_ptr [${iterm_ptr} getNet]
print_net $net_ptr $fp
}
}
### Attribute: ref_name ###
set master_ptr [${inst_ptr} getMaster]
set ref_name [${master_ptr} getName]
print_placeholder $fp "ref_name" $ref_name
### Attribute: Width ###
set width [ord::dbu_to_microns [${master_ptr} getWidth]]
print_float $fp "width" $width
### Attribute: Height ###
set height [ord::dbu_to_microns [${master_ptr} getHeight]]
print_float $fp "height" $height
### Attribute: type ###
print_placeholder $fp "type" "stdcell"
set inst_box [$inst_ptr getBBox]
set pts [find_mid_point_bbox $inst_box]
set origin_x [ord::dbu_to_microns [[[ord::get_db_block] getCoreArea] xMin]]
set origin_y [ord::dbu_to_microns [[[ord::get_db_block] getCoreArea] yMin]]
### Attribute: X ###
set X [ord::dbu_to_microns [lindex $pts 0]]
set X [expr $X - $origin_x]
print_float $fp "x" $X
### Attribute: Y ###
set Y [ord::dbu_to_microns [lindex $pts 1]]
set Y [expr $Y - $origin_y]
print_float $fp "y" $Y
puts $fp "}"
}
#### Generate protobuff format netlist ####
proc gen_pb_netlist { {file_name ""} } {
set block [ord::get_db_block]
set design [$block getName]
if { $file_name != "" } {
set out_file ${file_name}
} else {
set out_file "${design}.pb.txt"
}
set fp [open $out_file w+]
print_header $fp
foreach port_ptr [$block getBTerms] {
write_node_port $port_ptr $fp
}
foreach inst_ptr [$block getInsts] {
### Macro ###
if { [${inst_ptr} isBlock] } {
write_node_macro $inst_ptr $fp
foreach macro_pin_ptr [${inst_ptr} getITerms] {
if {[${macro_pin_ptr} isInputSignal] || [${macro_pin_ptr} isOutputSignal]} {
write_node_macro_pin $macro_pin_ptr $fp
}
}
} elseif { [${inst_ptr} isCore] } {
### Standard Cells ###
write_node_stdcell $inst_ptr $fp
}
}
close $fp
exec sed -i {s@\\@@g} $out_file
puts "Output netlist: $out_file"
}