move all position setting into position
Position and subclasses handle the logic, external to the classes, so it can be swapped out later (at runtime positions can’t change)
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@ -12,6 +12,9 @@ guard :minitest do # with Minitest::Unit
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# if any file XX in any directory in the /lib changes, run a test_XX in the
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# shadow directory in the /test
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watch(%r{^lib/(.*/)?([^/]+)\.rb$}) { |m| "test/#{m[1]}test_#{m[2]}.rb" }
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watch(%r{^lib/(.*/)?([^/]+)\.rb$}) { |m| "test/#{m[1]}test_#{m[2]}1.rb" }
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watch(%r{^lib/(.*/)?([^/]+)\.rb$}) { |m| "test/#{m[1]}test_#{m[2]}2.rb" }
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watch(%r{^lib/(.*/)?([^/]+)\.rb$}) { |m| "test/#{m[1]}test_#{m[2]}3.rb" }
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#Arm instructions
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watch(%r{^lib/arm/instructions/(.+)_instruction.rb}) { |m| "test/arm/test_#{m[1]}.rb" }
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@ -24,23 +24,7 @@ module Arm
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def insert(instruction)
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super
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my_pos = Risc::Position.get(self)
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@next.set_position( my_pos + self.byte_length , 0 , my_pos.binary)
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end
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def set_position( position , count , extra = nil)
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Risc::Position.set(self,position , extra)
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position += byte_length
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if self.next
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count += 1 #assumes 4 byte instructions, as does the whole setup
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if( 0 == count % 12) # 12 is the amount of instructions that fit into a BinaryCode
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count = 0
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position += 12 # 12=3*4 , 3 for marker,type,next words to jump over
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end
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self.next.set_position( position , count , extra)
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else
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position
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Risc::Position.set( my_pos + self.byte_length , 0 , my_pos.binary)
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end
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end
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end
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end
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@ -1,81 +0,0 @@
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module Arm
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class MachineCode
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def function_call( into , call )
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raise "Not CallSite #{call.inspect}" unless call.is_a? Risc::CallSite
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raise "Not linked #{call.inspect}" unless call.function
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into.add_code call( call.function )
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raise "No return type for #{call.function.name}" unless call.function.return_type
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call.function.return_type
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end
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def main_start( context )
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entry = Risc::Block.new("main_entry",nil,nil)
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entry.add_code mov( :fp , 0 )
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entry.add_code call( context.function )
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entry
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end
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def main_exit( context )
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exit = Risc::Block.new("main_exit",nil,nil)
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syscall(exit , 1)
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exit
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end
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def function_entry( block, f_name )
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block.add_code push( [:lr] )
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block
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end
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def function_exit( entry , f_name )
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entry.add_code pop( [:pc] )
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entry
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end
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# assumes string in standard receiver reg (r2) and moves them down for the syscall
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def write_stdout( function ) #, string
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# TODO save and restore r0
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function.mov( :r0 , 1 ) # 1 == stdout
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function.mov( :r1 , receiver_register )
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function.mov( receiver_register , :r3 )
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syscall( function.insertion_point , 4 ) # 4 == write
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end
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# stop, do not return
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def exit( function )#, string
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syscall( function.insertion_point , 1 ) # 1 == exit
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end
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# the number (a Risc::Integer) is (itself) divided by 10, ie overwritten by the result
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# and the remainder is overwritten (ie an out argument)
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# not really a function, more a macro,
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def div10( function, number , remainder )
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# Note about division: devision is MUCH more expensive than one would have thought
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# And coding it is a bit of a mind leap: it's all about finding a a result that gets the
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# remainder smaller than an int. i'll post some links sometime. This is from the arm manual
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tmp = function.new_local
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function.instance_eval do
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sub( remainder , number , 10 )
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sub( number , number , number , shift_lsr: 2)
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add( number , number , number , shift_lsr: 4)
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add( number , number , number , shift_lsr: 8)
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add( number , number , number , shift_lsr: 16)
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mov( number , number , shift_lsr: 3)
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add( tmp , number , number , shift_lsl: 2)
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sub( remainder , remainder , tmp , shift_lsl: 1 , update_status: 1)
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add( number , number, 1 , condition_code: :pl )
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add( remainder , remainder , 10 , condition_code: :mi )
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end
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end
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def syscall( block , num )
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# This is very arm specific, syscall number is passed in r7,
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# other arguments like a c call ie 0 and up
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sys = Risc::Integer.new( Risc::RiscValue.new(SYSCALL_REG) )
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ret = Risc::Integer.new( Risc::RiscValue.new(RETURN_REG) )
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block.add_code mov( sys , num )
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block.add_code swi( 0 )
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#todo should write type into r1 according to syscall
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ret
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end
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end
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end
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@ -44,12 +44,6 @@ module Risc
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ret
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end
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# labels have the same position as their next
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def set_position( position , count = 0 , extra = nil)
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Position.set(self,position , extra)
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self.next.set_position(position,count,extra) if self.next
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end
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# shame we need this, just for logging
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def byte_length
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0
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@ -78,7 +78,7 @@ module Risc
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translate_arm unless @translated
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#need the initial jump at 0 and then functions
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Position.set(binary_init,0)
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cpu_init.set_position( 12 ,0 , binary_init)
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Position.set(cpu_init , 3 , binary_init)
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@code_start = position_objects( binary_init.padded_length )
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# and then everything code
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position_code
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@ -91,8 +91,8 @@ module Risc
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# want to have the objects first in the executable
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objects.each do | id , objekt|
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next if objekt.is_a?( Parfait::BinaryCode) or objekt.is_a?( Risc::Label )
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Position.set(objekt,at)
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before = at
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Position.set(objekt,at)
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at += objekt.padded_length
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log.debug "Object #{objekt.class}:#{before.to_s(16)} len: #{(at - before).to_s(16)}"
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end
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@ -110,14 +110,16 @@ module Risc
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at = @code_start
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objects.each do |id , method|
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next unless method.is_a? Parfait::TypedMethod
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method.cpu_instructions.set_position( at + 12 , 0 , method.binary)
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before = at
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nekst = method.binary
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while(nekst)
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Position.set(nekst , at , method)
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at += nekst.padded_length
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nekst = nekst.next
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end
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Position.set( method.binary , at , method)
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Position.set( method.cpu_instructions, 3 , method.binary)
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# before = at
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# nekst = method.binary
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# while(nekst)
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# Position.set(nekst , at , method)
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# at += nekst.padded_length
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# nekst = nekst.next
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# end
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log.debug "Method #{method.name}:#{before.to_s(16)} len: #{(at - before).to_s(16)}"
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log.debug "Instructions #{method.cpu_instructions.object_id.to_s(16)}:#{(before+12).to_s(16)}"
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end
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@ -35,6 +35,9 @@ module Risc
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def to_s
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"0x#{@at.to_s(16)}"
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end
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# just a callback after creation AND insertion
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def init
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end
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def reset_to(pos)
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return false if pos == at
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if((at - pos).abs > 1000)
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@ -72,7 +75,10 @@ module Risc
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old.reset_to(pos)
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return old
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end
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self.positions[object] = for_at( object , pos , extra)
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position = for_at( object , pos , extra)
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self.positions[object] = position
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position.init
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position
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end
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def self.for_at(object , at , extra)
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@ -96,9 +102,26 @@ module Risc
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@binary = binary
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end
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def set_position( position , binary = nil)
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raise "invalid position #{position}" if position > 15
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binary = Risc::Position.get(self).binary unless binary
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Risc::Position.set(self, position , binary)
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position += byte_length / 4 #assumes 4 byte instructions, as does the whole setup
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if self.next
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if( 3 == position % 15) # 12 is the amount of instructions that fit into a BinaryCode
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position = 3
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binary = binary.next
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end
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self.next.set_position( position , binary)
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else
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position
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end
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end
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def reset_to(pos)
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changed = super(pos)
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puts "Reset (#{changed}) #{instruction}"
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#puts "Reset (#{changed}) #{instruction}"
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return unless changed
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return unless instruction.next
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instruction.next.set_position( pos + instruction.byte_length , 0)
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@ -82,22 +82,22 @@ module Arm
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end
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def test_too_big_add
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code = @machine.add :r1 , :r1, 0x222
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code.set_position(0,0)
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Risc::Position.set(0,0)
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# add 0x02 (first instruction) and then 0x220 shifted
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assert_code code , :add , [0x02,0x1c,0x91,0xe2] #e2 91 1e 02
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# added extra instruction to add "extra"
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assert_code code.next , :add , [0x22,0x10,0x91,0xe2] #e2 91 10 22
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end
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def label pos = 0x22 + 8
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def label( pos = 0x22 + 8)
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l = Risc.label("some" , "Label")
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l.set_position pos
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Risc::Position.set(l,pos , 1)
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l
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end
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def test_move_object
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code = @machine.add( :r1 , label)
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code.set_position(0,0)
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Risc::Position.set(code,0,0)
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assert_code code , :add , [0x22,0x10,0x9f,0xe2] #e2 9f 10 22
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end
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@ -22,7 +22,7 @@ module Arm
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end
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def test_mov_big
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code = @machine.mov :r0, 0x222 # is not 8 bit and can't be rotated by the arm system in one instruction
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code.set_position(0,0)
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Risc::Position.set(code,0,1)
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begin # mov 512(0x200) = e3 a0 0c 02 add 34(0x22) = e2 90 00 22
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assert_code code , :mov , [ 0x02,0x0c,0xb0,0xe3]
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rescue Risc::LinkException
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@ -42,7 +42,7 @@ module Risc
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end
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def test_pos_arm
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mov = Arm::ArmMachine.mov :r1, 128
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mov.set_position(0,0)
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Risc::Position.set(0,0)
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end
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end
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@ -1,8 +1,12 @@
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require_relative "../helper"
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module Risc
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class TestPosition < MiniTest::Test
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class TestPositionBasic < MiniTest::Test
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def setup
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Risc.machine.boot
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@binary = Parfait::BinaryCode.new(1)
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end
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def test_creation_ok
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assert Position.new(0)
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end
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@ -26,7 +30,7 @@ module Risc
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assert_equal 5 , pos.at
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end
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def test_set_instr
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pos = Position.set( Risc::Label.new("hi","ho") , 0)
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pos = Position.set( Risc::Label.new("hi","ho") , 0 , @binary)
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assert_equal IPosition , pos.class
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end
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def tet_tos
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