46 lines
1.6 KiB
Ruby
46 lines
1.6 KiB
Ruby
require_relative 'helper'
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module Arm
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class TestControl < MiniTest::Test
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include ArmHelper
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def test_b
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# the address is what an assembler calculates (a signed number for the amount of instructions),
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# ie the relative (to pc) address -8 (pipeline) /4 so save space
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# so the cpu adds the value*4 and starts loading that (load, decode, execute)
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code = @machine.b( 0 ) #this jumps to the next next instruction
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assert_code code , :b , [0x0,0x0,0x0,0xea] #ea 00 00 00
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end
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def test_call #see comment above. bx not implemented (as it means into thumb, and no thumb here)
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code = @machine.call( -4 ,{} )#this jumps to the next instruction
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assert_code code , :call, [0xff,0xff,0xff,0xeb] #ea ff ff fe
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end
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def test_has_branch_to
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label = Risc::Label.new("HI","ho" , FakeAddress.new(0))
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code = @machine.b( label )
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assert_equal label , code.branch_to
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end
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def test_branch_to_for_swi
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code = @machine.swi( 0x05 )
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assert_nil code.branch_to
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end
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def test_method_call
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Parfait.boot!(Parfait.default_test_options)
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bin = Parfait::BinaryCode.new(1)
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Risc::Position.new(bin).set(0x20)
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code = @machine.call( bin ,{} )#this jumps to the next instruction
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Risc::Position.new(code).set(0)
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assert_code code , :call, [0x08,0x0,0x0,0xeb]
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end
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def test_swi
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code = @machine.swi( 0x05 )
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assert_code code , :swi , [0x05,0x00,0x00,0xef]#ef 00 00 05
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end
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def test_swi_neg
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assert_raises(RuntimeError) do
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assert_code @machine.swi("0x05") , :swi , [0x05,0x00,0x00,0xef]
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end
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end
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end
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end
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