101 lines
2.3 KiB
Ruby
101 lines
2.3 KiB
Ruby
require 'asm/arm/arm_assembler'
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require 'asm/arm/instruction'
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require_relative 'generator_label'
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require 'asm/nodes'
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require 'stream_reader'
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require 'stringio'
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require "asm/data_object"
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class Asm::Arm::CodeGenerator
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def initialize
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@asm = Asm::Assembler.new
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@externs = []
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end
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def data(str)
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@asm.add_object Asm::DataObject.new(str)
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end
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%w(r0 r1 r2 r3 r4 r5 r6 r7 r8 r9 r10 r11 r12
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r13 r14 r15 a1 a2 a3 a4 v1 v2 v3 v4 v5 v6
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rfp sl fp ip sp lr pc
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).each { |reg|
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define_method(reg) {
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[:reg, reg]
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}
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}
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def instruction(name, *args)
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node = Asm::InstructionNode.new
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node.opcode = name.to_s
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node.args = []
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args.each { |arg|
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if (arg.is_a?(Array))
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if (arg[0] == :reg)
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node.args << Asm::RegisterArgNode.new(arg[1])
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end
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elsif (arg.is_a?(Integer))
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node.args << Asm::NumLiteralArgNode.new(arg)
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elsif (arg.is_a?(Symbol))
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node.args << Asm::LabelRefArgNode.new(arg.to_s)
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elsif (arg.is_a?(Asm::Arm::GeneratorLabel) or arg.is_a?(Asm::Arm::GeneratorExternLabel))
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node.args << arg
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else
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raise 'Invalid argument `%s\' for instruction' % arg.inspect
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end
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}
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@asm.add_object Asm::Arm::Instruction.new(node)
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end
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%w(adc add and bic eor orr rsb rsc sbc sub mov mvn cmn cmp teq tst b bl bx swi str strb ldr ldrb
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).each { |inst|
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define_method(inst) { |*args|
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instruction inst.to_sym, *args
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}
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define_method(inst+'s') { |*args|
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instruction (inst+'s').to_sym, *args
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}
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%w(al eq ne cs mi hi cc pl ls vc lt le ge gt vs
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).each { |cond_suffix|
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define_method(inst+cond_suffix) { |*args|
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instruction (inst+cond_suffix).to_sym, *args
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}
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define_method(inst+'s'+cond_suffix) { |*args|
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instruction (inst+'s'+cond_suffix).to_sym, *args
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}
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}
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}
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def label
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Asm::Arm::GeneratorLabel.new(@asm)
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end
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def label!
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lbl = Asm::Arm::GeneratorLabel.new(@asm)
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lbl.set!
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lbl
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end
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def extern(sym)
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if (lbl = @externs.find { |extern| extern.name == sym })
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lbl
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else
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@externs << lbl = Asm::Arm::GeneratorExternLabel.new(sym)
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@asm.add_object lbl
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lbl
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end
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end
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def assemble
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io = StringIO.new
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@asm.assemble(io)
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io.string
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end
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def relocations
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@asm.relocations
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end
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end
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