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Why does the compiler compile an 8-bit operation that uses bitwise operators into a 16-bit operation in assembly?

April 26, 2017assembly BitWise compiler operation operators uses

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Why does the compiler compile an 8-bit operation that uses bitwise operators into a 16-bit operation in assembly?

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Bitwise operations in Standard C will automatically promote their operands to an int, which is (by default) 16 bits in avr-gcc. To work around this use typecasts on the operands, including literals, to declare that the values are to be 8 bit operands.