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# File 'lib/micro_cisc/compile/statement.rb', line 96
def parse
instruction = nil
names = []
op = nil
if FUNCTION_REGEX =~ @minimal
return parse_function_call
elsif SUGAR_REGEX =~ @minimal
match = SUGAR_REGEX.match(@minimal)
op = match['op']
names = match['names'].split(',').map(&:strip)
@minimal = match['param']
if minimal.start_with?('copy') || minimal.start_with?('compute')
instruction = Instruction.new(@label_generator, @minimal, original, self)
else
var = match['param']
imm_match = IMM_REGEX.match(var)
imm_val = imm_match ? imm_match['imm_val'].to_i : 0
var = var.to_s.gsub(IMM_REGEX, '').strip
@minimal = "#{get_var(var)}#{" #{imm_val}.imm" if imm_val != 0}"
end
else
instruction = Instruction.new(@label_generator, @minimal, original, self)
end
if instruction && instruction.instruction?
dest = instruction.dest
if instruction.inc && instruction.inc > 0
if dest > 4
update_variable("#{dest - 4}.mem", -1)
else
update_variable("#{dest}.mem", 1)
end
end
if minimal.start_with?('copy') && dest > 4 && instruction.src == dest
update_variable("#{dest - 4}.mem", -1 * instruction.immediates.first)
end
dest -= 4 if dest > 4
@minimal = "#{dest}.mem"
end
names.each_with_index do |name, index|
if op == 'as'
create_equivalent(name, @minimal, index)
elsif op == '='
create_variable(name, @minimal, index)
end
end
[instruction].compact
end
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