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decode.rb
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decode.rb
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file = File.new(ARGV[0], "r")
imem_out_regex = /(^.*?)imem_out: (\d+)$/
general_regex = /(^.*): (\d+)$/
def replace(insn, r)
if insn == "0000"
(r == "000000000000") ? "NOP" : "BRANCH #{r[0..3]} #{r[4..15]}" + "\t\t\t #{insn} #{r}"
elsif insn == "0001"
"ARITH d=#{r[0..2]} s=#{r[3..5]} kind=#{r[6..8]} t=#{r[9..12]}" + "\t\t\t #{insn} #{r}"
elsif insn == "0010"
"CMP s=#{r[0..2]} kind=#{r[3..4]} #{r[5..12]}" + "\t\t\t #{insn} #{r}"
elsif insn == "0100"
"JSR kind=#{r[0]} #{r[1..12]}" + "\t\t\t #{insn} #{r}"
elsif insn == "0101"
"BOOL d=#{r[0..2]} s=#{r[3..5]} kind=#{r[6..8]} t=#{r[9..12]}" + "\t\t\t #{insn} #{r}"
elsif insn == "0110"
"LOAD #{r}" + "\t\t\t #{insn} #{r}"
elsif insn == "0111"
"STORE #{r}" + "\t\t\t #{insn} #{r}"
elsif insn == "1000"
"RTI" + "\t\t\t #{insn} #{r}"
elsif insn == "1001"
"CONST #{r[0..2]} #{r[3..15]}" + "\t\t\t #{insn} #{r}"
elsif insn == "1010"
"SHIFT d=#{r[0..2]} s=#{r[3..5]} kind=#{r[6..7]} t=#{r[8..11]}" + "\t\t\t #{insn} #{r}"
elsif insn == "1100"
"JUMP #{r[0..12]}" + "\t\t\t #{insn} #{r}"
elsif insn == "1101"
"HICONST d=#{r[0..2]} 1 #{r[5..12]}" + "\t\t\t #{insn} #{r}"
elsif insn == "1111"
"TRAP #{r[5..12]}" + "\t\t\t #{insn} #{r}"
end
end
while line = file.gets
match = imem_out_regex.match(line)
if !match.nil?
puts "#{match[1]}imem_out: #{replace(match[2][0..3], match[2][4..15])}"
else
match = general_regex.match(line)
if !match.nil?
if !line.include? "opcode" and line.include? "pc"
puts "#{match[1]}: #{match[2].to_i(2).to_s(16)}"
else
puts line
end
else
puts line
end
end
end