137 lines
5.2 KiB
Ruby
137 lines
5.2 KiB
Ruby
require_relative 'helper'
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require "asm/arm/arm_assembler"
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# try to test that the generation of basic instructions works
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# one instruction at a time, reverse testing from objdump --demangle -Sfghxp
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# tests are named as per assembler code, ie test_mov testing mov instruction
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# adc add and bic eor orr rsb rsc sbc sub mov mvn cmn cmp teq tst b bl bx swi strb
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class TestArmAsm < MiniTest::Test
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# need a code generator, for arm
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def setup
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@assembler = Asm::Arm::ArmAssembler.new
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end
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# code is what the generator spits out, at least one instruction worth (.first)
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# the op code is wat was witten as assembler in the first place and the binary result
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# is reversed and in 4 bytes as ruby can only do 31 bits and so we can't test with just one int (?)
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def assert_code code , op , should
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assert_equal op , code.opcode
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binary = @assembler.assemble_to_string
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assert_equal 4 , binary.length
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index = 0
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binary.each_byte do |byte |
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assert_equal should[index] , byte , "byte #{index} 0x#{should[index].to_s(16)} != 0x#{byte.to_s(16)}"
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index += 1
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end
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end
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def test_adc
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code = @assembler.instance_eval { adc r1, r3, r5}.first
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assert_code code , :adc , [0x05,0x10,0xa3,0xe0] #e0 a3 10 05
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end
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def test_add
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code = @assembler.instance_eval { add r1 , r1, r3}.first
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assert_code code , :add , [0x03,0x10,0x81,0xe0] #e0 81 10 03
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end
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def test_and # inst eval doesn't really work with and
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code = @assembler.and( @assembler.r1 , @assembler.r2 , @assembler.r3).first
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assert_code code , :and , [0x03,0x10,0x02,0xe0] #e0 01 10 03
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end
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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 = @assembler.instance_eval { b -1 }.first #this jumps to the next instruction
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assert_code code , :b , [0xff,0xff,0xff,0xea] #ea ff ff fe
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end
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def test_bl #see comment above. bx not implemented (as it means into thumb, and no thumb here)
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code = @assembler.instance_eval { bl -1 }.first #this jumps to the next instruction
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assert_code code , :bl , [0xff,0xff,0xff,0xeb] #ea ff ff fe
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end
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def test_bic
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code = @assembler.instance_eval { bic r2 , r2 , r3 }.first
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assert_code code , :bic , [0x03,0x20,0xc2,0xe1] #e3 c2 20 44
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end
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def test_cmn
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code = @assembler.instance_eval { cmn r1 , r2 }.first
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assert_code code , :cmn , [0x02,0x00,0x71,0xe1] #e1 71 00 02
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end
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def test_cmp
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code = @assembler.instance_eval { cmp r1 , r2 }.first
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assert_code code , :cmp , [0x02,0x00,0x51,0xe1] #e1 51 00 02
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end
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def test_eor
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code = @assembler.instance_eval { eor r2 , r2 , r3 }.first
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assert_code code , :eor , [0x03,0x20,0x22,0xe0] #e0 22 20 03
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end
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def test_ldr
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code = @assembler.instance_eval { ldr r0, r0 }.first
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assert_code code, :ldr , [0x00,0x00,0x90,0xe5] #e5 90 00 00
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end
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def test_ldr2
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code = @assembler.instance_eval { ldr r0, r0 + 4 }.first
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assert_code code, :ldr , [0x04,0x00,0x90,0xe5] #e5 90 00 04
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end
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def test_ldrb
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code = @assembler.instance_eval { ldrb r0, r0 }.first
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assert_code code, :ldrb , [0x00,0x00,0xd0,0xe5] #e5 d0 00 00
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end
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def test_orr
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code = @assembler.instance_eval { orr r2 , r2 , r3 }.first
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assert_code code , :orr , [0x03,0x20,0x82,0xe1] #e1 82 20 03
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end
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def test_push
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code = @assembler.instance_eval { push lr }.first
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assert_code code , :push , [0x00,0x40,0x2d,0xe9] #e9 2d 40 00
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end
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def test_pop
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code = @assembler.instance_eval { pop pc }.first
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assert_code code , :pop , [0x00,0x80,0xbd,0xe8] #e8 bd 80 00
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end
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def test_rsb
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code = @assembler.instance_eval { rsb r1 , r2 , r3 }.first
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assert_code code , :rsb , [0x03,0x10,0x62,0xe0]#e0 62 10 03
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end
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def test_rsc
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code = @assembler.instance_eval { rsc r2 , r3 , r4 }.first
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assert_code code , :rsc , [0x04,0x20,0xe3,0xe0]#e0 e3 20 04
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end
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def test_sbc
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code = @assembler.instance_eval { sbc r3, r4 , r5 }.first
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assert_code code , :sbc , [0x05,0x30,0xc4,0xe0]#e0 c4 30 05
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end
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def test_str
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code = @assembler.instance_eval { str r0, r0 }.first
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assert_code code, :str , [0x00,0x00,0x80,0xe5] #e5 81 00 00
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end
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def test_strb
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code = @assembler.instance_eval { strb r0, r0 }.first
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assert_code code, :strb , [0x00,0x00,0xc0,0xe5] #e5 c0 00 00
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end
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def test_sub
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code = @assembler.instance_eval { sub r2, r0, 1 }.first
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assert_code code, :sub , [0x01,0x20,0x40,0xe2] #e2 40 20 01
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end
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def test_swi
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code = @assembler.instance_eval { swi 0x05 }.first
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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_teq
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code = @assembler.instance_eval{ teq r1 , r2}.first
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assert_code code , :teq , [0x02,0x00,0x31,0xe1] #e1 31 00 02
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end
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def test_tst
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code = @assembler.instance_eval{ tst r1 , r2}.first
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assert_code code , :tst , [0x02,0x00,0x11,0xe1] #e1 11 00 02
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end
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def test_mov
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code = @assembler.instance_eval { mov r0, 5 }.first
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assert_code code , :mov , [0x05,0x00,0xa0,0xe3] #e3 a0 10 05
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end
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def test_mvn
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code = @assembler.instance_eval { mvn r1, 5 }.first
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assert_code code , :mvn , [0x05,0x10,0xe0,0xe3] #e3 e0 10 05
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end
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end
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