remove io.write_unsigned_8
and replace with write_unsigned_32, so that is the only used method from the stream Next up, replace the actual “stream” with a binary code writer
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@ -60,20 +60,20 @@ module Arm
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def write_call(arg,io)
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def write_call(arg,io)
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raise "else not Attributed arg =\n#{arg.to_s[0..1000]}: #{inspect[0..1000]}" unless (arg.is_a?(Numeric))
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raise "else not Attributed arg =\n#{arg.to_s[0..1000]}: #{inspect[0..1000]}" unless (arg.is_a?(Numeric))
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jmp_val = arg >> 2
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val = (arg >> 2) & 0xFFFFFF
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packed = [jmp_val].pack('l')
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raise "too big #{val}" if (val & 0xFFFFFFFF000000) != 0
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# signed 32-bit, condense to 24-bit
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val |= shift(op_bit_code , 24)
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# TODO add check that the value fits into 24 bits
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val |= shift(COND_CODES[@attributes[:condition_code]] , 28)
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io << packed[0,3]
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io.write_unsigned_int_32( val )
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io.write_unsigned_int_8 op_bit_code | (COND_CODES[@attributes[:condition_code]] << 4)
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end
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end
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def handle_swi(io)
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def handle_swi(io)
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arg = @first
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arg = @first
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raise "expected literal not #{arg} #{inspect}" unless (arg.is_a?(Numeric))
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raise "expected literal not #{arg} #{inspect}" unless (arg.is_a?(Numeric))
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packed = [arg].pack('L')[0,3]
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val = arg & 0xFFFFFF
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io << packed
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val |= shift(0b1111 , 24)
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io.write_unsigned_int_8 0b1111 | (COND_CODES[@attributes[:condition_code]] << 4)
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val |= shift(COND_CODES[@attributes[:condition_code]] , 28)
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io.write_unsigned_int_32 val
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end
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end
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def to_s
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def to_s
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