53 lines
1.4 KiB
Ruby
53 lines
1.4 KiB
Ruby
module Asm
|
|
module Arm
|
|
# ADDRESSING MODE 4
|
|
class BuilderD
|
|
include Asm::ARM::InstructionTools
|
|
|
|
def initialize
|
|
@cond = 0b1110
|
|
@inst_class = Asm::ARM::Instruction::OPC_STACK
|
|
@pre_post_index = 0
|
|
@up_down = 0
|
|
@s = 0
|
|
@write_base = 0
|
|
@store_load = 0
|
|
@rn = 0
|
|
@operand = 0
|
|
end
|
|
attr_accessor :cond, :inst_class, :pre_post_index, :up_down,
|
|
:s, :write_base, :store_load, :rn, :operand
|
|
|
|
def self.make(pre_post, up_down, write, store_load)
|
|
a = new
|
|
a.pre_post_index = pre_post
|
|
a.up_down = up_down
|
|
a.write_base = write
|
|
a.store_load = store_load
|
|
a
|
|
end
|
|
|
|
# Build representation for source value
|
|
def build_operand(arg)
|
|
if (arg.is_a?(Asm::Parser::RegisterListArgNode))
|
|
@operand = 0
|
|
arg.registers.each do |reg_node|
|
|
reg = reg_ref(reg_node)
|
|
@operand |= (1 << reg)
|
|
end
|
|
else
|
|
raise Asm::AssemblyError.new(Asm::ERRSTR_INVALID_ARG, arg)
|
|
end
|
|
end
|
|
|
|
def write(io, as)
|
|
val = operand | (rn << 16) | (store_load << 16+4) |
|
|
(write_base << 16+4+1) | (s << 16+4+1+1) | (up_down << 16+4+1+1+1) |
|
|
(pre_post_index << 16+4+1+1+1+1) | (inst_class << 16+4+1+1+1+1+2) |
|
|
(cond << 16+4+1+1+1+1+2+2)
|
|
io.write_uint32 val
|
|
end
|
|
end
|
|
end
|
|
end
|