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fix div10

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by reducing the incoming integer to fixnum
and then pushing the fixnum result into a new integer
This commit is contained in:
Torsten Ruger
2018-04-01 14:50:13 +03:00
parent 5a861d4ed5
commit 8acfda457f
3 changed files with 33 additions and 28 deletions
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14
lib/risc/builtin/integer.rb
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@ -29,13 +29,16 @@ module Risc
end
def div10( context )
s = "div_10"
s = "div_10 "
compiler = compiler_for(:Integer,:div10 ,{})
me = compiler.add_known( :receiver )
tmp = compiler.add_known( :receiver )
q = compiler.add_known( :receiver )
const = compiler.use_reg :Integer , 1
compiler.add_load_data( s, 1 , const )
compiler.reduce_int( s , me )
compiler.reduce_int( s , tmp )
compiler.reduce_int( s , q )
const = compiler.use_reg :fixnum , 1
compiler.add_load_data( s , 1 , const )
# int tmp = self >> 1
compiler.add_code Risc.op( s , :>> , tmp , const)
# int q = self >> 2
@ -80,10 +83,9 @@ module Risc
# return q + tmp
compiler.add_code Risc.op( s , :+ , q , tmp )
# compiler.add_new_int(me , other)
# compiler.add_reg_to_slot( source + "5" , other , :message , :return_value)
compiler.add_new_int(q , tmp)
compiler.add_reg_to_slot( s , tmp , :message , :return_value)
compiler.add_reg_to_slot( s , q , :message , :return_value)
compiler.add_mom( Mom::ReturnSequence.new)
return compiler.method
end

5
lib/risc/method_compiler.rb
View File

@ -165,6 +165,9 @@ module Risc
return int_arg
end
# assumed Integer in given register is replaced by the fixnum that it is holding
def reduce_int( source , register )
add_slot_to_reg( source + "int -> fix" , register , Parfait::Integer.integer_index , register)
end
end
end