require 'evoasm/test'
require 'evoasm/x64/cpu_state'
require 'evoasm/buffer'

module Evoasm
  module X64
    class CPUStateTest < Minitest::Test
      def setup
        @cpu_state = CPUState.new
      end

      def test_clean
        X64.registers.each do |reg|
          data = @cpu_state[reg]
          refute_empty data
          assert data.all? { |e| e == 0 }
        end
      end

      def test_set_get
        @cpu_state[:a] = 0xFF
        assert_equal [0xFF], @cpu_state[:a]

        @cpu_state[:b] = [0xDEADBEEF]
        assert_equal [0xDEADBEEF], @cpu_state[:b]

        # FIXME: with AVX512 the array
        # should be of size 8
        data = (1..4).to_a
        @cpu_state[:xmm0] = data
        assert_equal data, @cpu_state[:xmm0]
      end

      def test_clone
        @cpu_state[:b] = 0xFAB
        cloned_cpu_state = @cpu_state.clone

        assert_equal [0xFAB], cloned_cpu_state[:b]
      end

      def test_emit_store
        buffer = Buffer.new 1024
        Evoasm::X64.encode(:mov_rm32_imm32, {reg0: :a, imm0: 7}, buffer)

        @cpu_state.emit_store buffer
        Evoasm::X64.encode(:ret, {}, buffer)

        buffer.execute!
        assert_equal [7], @cpu_state[:a]
      end

      def test_emit_load
        buffer = Buffer.new 1024

        @cpu_state[:a] = 0xABCD
        @cpu_state[:rflags] = [0x1]

        cpu_state_after = CPUState.new

        X64.emit_stack_frame buffer do
          @cpu_state.emit_load buffer
          cpu_state_after.emit_store buffer
        end

        #buffer.__log__ :warn
        buffer.execute!

        assert_equal [0xABCD], cpu_state_after[:a]
        assert_equal [0x1], cpu_state_after[:rflags]
      end
    end
  end
end