test and fix store instruction (syntax was not for coding)
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@ -31,69 +31,56 @@ module Asm
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a
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a
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end
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end
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class MathReferenceArgNode < Asm::ReferenceArgNode
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attr_accessor :op, :right
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end
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def simplify_reference(arg)
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node = MathReferenceArgNode.new
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if (arg.is_a?(Asm::MathNode))
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node.argument = arg.left
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node.op = arg.op
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node.right = arg.right
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else
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node.argument = arg
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end
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node
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end
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# Build representation for target address
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# Build representation for target address
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def build_operand(arg1)
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def build_operand(arg)
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if (arg1.is_a?(Asm::ReferenceArgNode))
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#str / ldr are _seruous instructions. With BIG possibilities no half are implemented
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argr = simplify_reference(arg1.argument)
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if (arg.is_a?(Asm::RegisterArgNode))
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arg = argr.argument
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@i = 0
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if (arg.is_a?(Asm::RegisterArgNode))
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@pre_post_index = 0
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@i = 0
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@w = 0
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@pre_post_index = 1
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@rn = reg_ref(arg)
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@w = 0
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@operand = 0
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@rn = reg_ref(arg)
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@operand = 0
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if (argr.op and argr.right.is_a?(Asm::NumLiteralArgNode))
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if (false ) #argr.op and argr.right.is_a?(Asm::NumLiteralArgNode))
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val = argr.right.value
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if (val < 0)
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# this if was buggy even before
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@add_offset = 0
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# but as mentioned here we'd have to implement the options
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val *= -1
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# though a better syntax will have to be found
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else
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val = argr.right.value
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@add_offset = 1
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if (val < 0)
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end
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@add_offset = 0
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if (val.abs > 4095)
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val *= -1
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raise Asm::AssemblyError.new('reference offset too large/small (max 4095)', argr.right)
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else
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end
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@add_offset = 1
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@operand = val
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elsif (argr.op)
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raise Asm::AssemblyError.new('reference offset must be an integer literal', argr.right)
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end
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end
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if (val.abs > 4095)
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raise Asm::AssemblyError.new('reference offset too large/small (max 4095)', argr.right)
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end
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@operand = val
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else
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else
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raise Asm::AssemblyError.new(Asm::ERRSTR_INVALID_ARG, arg)
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# raise Asm::AssemblyError.new(Asm::ERRSTR_INVALID_ARG, arg)
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end
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end
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elsif (arg1.is_a?(Asm::LabelEquivAddrArgNode) or arg1.is_a?(Asm::NumEquivAddrArgNode))
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elsif (arg.is_a?(Asm::LabelEquivAddrArgNode) or arg.is_a?(Asm::NumEquivAddrArgNode))
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@i = 0
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@i = 0
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@pre_post_index = 1
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@pre_post_index = 1
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@w = 0
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@w = 0
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@rn = 15 # pc
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@rn = 15 # pc
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@operand = 0
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@operand = 0
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@use_addrtable_reloc = true
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@use_addrtable_reloc = true
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@addrtable_reloc_target = arg1
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@addrtable_reloc_target = arg
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else
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else
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puts "Invalid #{arg1.inspect}"
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puts "Invalid #{arg.inspect}"
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raise Asm::AssemblyError.new(Asm::ERRSTR_INVALID_ARG, arg1.inspect)
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raise Asm::AssemblyError.new(Asm::ERRSTR_INVALID_ARG, arg.inspect)
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end
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end
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end
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end
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def write(io, as, ast_asm, inst)
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def write(io, as, ast_asm, inst)
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val = operand | (rd << 12) | (rn << 12+4) |
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#not sure about these 2 constants. They produce the correct output for str r0 , r1
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# but i can't help thinking that that is because they are not used in that instruction and
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# so it doesn't matter. Will see
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@add_offset = 1
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@pre_post_index = 1
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val = operand | (rd << 12 ) | (rn << 12 + 4) |
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(load_store << 12+4+4) | (w << 12+4+4+1) |
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(load_store << 12+4+4) | (w << 12+4+4+1) |
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(byte_access << 12+4+4+1+1) | (add_offset << 12+4+4+1+1+1) |
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(byte_access << 12+4+4+1+1) | (add_offset << 12+4+4+1+1+1) |
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(pre_post_index << 12+4+4+1+1+1+1) | (i << 12+4+4+1+1+1+1+1) |
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(pre_post_index << 12+4+4+1+1+1+1) | (i << 12+4+4+1+1+1+1+1) |
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@ -65,13 +65,6 @@ module Asm
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class LabelEquivAddrArgNode < LabelRefArgNode
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class LabelEquivAddrArgNode < LabelRefArgNode
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end
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end
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class ReferenceArgNode < ArgNode
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attr_accessor :argument
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def initilize arg
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@argument = arg
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end
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end
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class ParseError < StandardError
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class ParseError < StandardError
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def initialize(message, s)
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def initialize(message, s)
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super(message)
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super(message)
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@ -37,6 +37,17 @@ class TestArmAsm < MiniTest::Test
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code = @generator.and( [:reg , 'r1'] , [:reg , 'r2'] , [:reg , 'r3']).first
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code = @generator.and( [:reg , 'r1'] , [:reg , 'r2'] , [:reg , 'r3']).first
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assert_code code , :and , [0x03,0x10,0x02,0xe0] #e0 01 10 03
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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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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 = @generator.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 = @generator.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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def test_bic
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code = @generator.instance_eval { bic r2 , r2 , r3 }.first
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code = @generator.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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assert_code code , :bic , [0x03,0x20,0xc2,0xe1] #e3 c2 20 44
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@ -69,18 +80,26 @@ class TestArmAsm < MiniTest::Test
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code = @generator.instance_eval { sbc r3, r4 , r5 }.first
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code = @generator.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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assert_code code , :sbc , [0x05,0x30,0xc4,0xe0]#e0 c4 30 05
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end
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end
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def test_str
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code = @generator.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_sub
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def test_sub
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code = @generator.instance_eval { sub r2, r0, 1 }.first
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code = @generator.instance_eval { sub r2, r0, 1 }.first
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assert_code code, :sub , [0x01,0x20,0x40,0xe2]
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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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end
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def test_swi
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def test_swi
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code = @generator.instance_eval { swi 0x05 }.first
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code = @generator.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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assert_code code , :swi , [0x05,0x00,0x00,0xef]#ef 00 00 05
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end
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end
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def test_teq
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def test_teq
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code = @generator.teq( [:reg , 'r1'] , [:reg , 'r2'] ).first
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code = @generator.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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assert_code code , :teq , [0x02,0x00,0x31,0xe1] #e1 31 00 02
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end
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end
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def test_tst
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code = @generator.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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def test_mov
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code = @generator.instance_eval { mov r0, 5 }.first
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code = @generator.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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assert_code code , :mov , [0x05,0x00,0xa0,0xe3] #e3 a0 10 05
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@ -89,7 +108,6 @@ class TestArmAsm < MiniTest::Test
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code = @generator.instance_eval { mvn r1, 5 }.first
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code = @generator.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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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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# tst b bl bx strb
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def saved_other
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def saved_other
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@generator.instance_eval do
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@generator.instance_eval do
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mov r0, 5
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mov r0, 5
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