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fix putint (too eager optimization broke it)

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This commit is contained in:
Torsten Ruger 2014-06-12 13:47:06 +03:00
parent 506f98da5a
commit 8da1bc4645
3 changed files with 16 additions and 6 deletions
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2
lib/arm/arm_machine.rb
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@ -110,6 +110,7 @@ module Arm
# Note about division: devision is MUCH more expensive than one would have thought
# And coding it is a bit of a mind leap: it's all about finding a a result that gets the
# remainder smaller than an int. i'll post some links sometime. This is from the arm manual
tmp = function.new_local
function.instance_eval do
sub( remainder , number , 10 )
sub( number , number , number , shift_lsr: 2)
@ -117,7 +118,6 @@ module Arm
add( number , number , number , shift_lsr: 8)
add( number , number , number , shift_lsr: 16)
mov( number , number , shift_lsr: 3)
tmp = function.new_local
add( tmp , number , number , shift_lsl: 2)
sub( remainder , remainder , tmp , shift_lsl: 1 , update_status: 1)
add( number , number, 1 , condition_code: :pl )

1
lib/vm/instruction.rb
View File

@ -24,6 +24,7 @@ module Vm
def initialize options
@attributes = options
end
attr_reader :attributes
def opcode
@attributes[:opcode]
end

19
lib/vm/passes.rb
View File

@ -30,9 +30,12 @@ module Vm
next if n.nil?
next unless kode.is_a? LogicInstruction
next unless n.is_a? MoveInstruction
# specific arm instructions, don't optimize as don't know what the extra mean
# small todo. This does not catch condition_code that are not :al
next if (n.attributes.length > 3) or (kode.attributes.length > 3)
if kode.result == n.from
puts "KODE #{kode.result.inspect}"
puts "N #{n.from.inspect}"
puts "KODE #{kode.inspect} , #{kode.attributes.length}"
puts "N #{n.inspect} , #{n.attributes.length}"
kode.result = n.to
block.codes.delete(n)
end
@ -50,6 +53,9 @@ module Vm
next if n.nil?
next unless kode.is_a? MoveInstruction
next unless n.is_a? MoveInstruction
# specific arm instructions, don't optimize as don't know what the extra mean
# small todo. This does not catch condition_code that are not :al
next if (n.attributes.length > 3) or (kode.attributes.length > 3)
if kode.to == n.from
kode.to = n.to
block.codes.delete(n)
@ -63,9 +69,12 @@ module Vm
def run block
block.codes.dup.each_with_index do |kode , index|
next unless kode.is_a? MoveInstruction
# specific arm instructions, don't optimize as don't know what the extra mean
# small todo. This does not catch condition_code that are not :al
next if (kode.attributes.length > 3)
if kode.to == kode.from
block.codes.delete(kode)
puts "deleted noop move in #{block.name}"
puts "deleted noop move in #{block.name} #{kode.inspect}"
end
end
end
@ -89,9 +98,9 @@ module Vm
block.codes.delete(push)
block.next.codes.delete(pop)
else
puts "PUSH #{push}"
#puts "PUSH #{push}"
push.set_registers(locals)
puts "POP #{pop}"
#puts "POP #{pop}"
pop.set_registers(locals)
end
end