keep track of used and assigned registers for each block

2014-06-08 01:41:56 +03:00
parent fbcfa844de
commit b66c4157d5
4 changed files with 78 additions and 12 deletions
--- a/lib/arm/arm_machine.rb
+++ b/lib/arm/arm_machine.rb
@ -106,7 +106,7 @@ module Arm
    end

    def syscall block , num
-      sys_and_ret = Vm::Integer.new(7)
+      sys_and_ret = Vm::Integer.new( Vm::Function::RETURN_REG )
      block <<  mov(  sys_and_ret , num )
      block <<  swi(  0 )
      #small todo, is this actually correct for all (that they return int)