How can I assign bit by bit to an integer in C?

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How do you set, clear and toggle a single bit in C?

I want to create an assembler , so I need to assign 32 bits bit by bit or field by field to create 32 bit opcode from assembly ... how can I do this in C ? how can I assign bits in integer ? can this be done ?

score 2 · Answer 1 · edited May 23 '17 at 12:20

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You can declare these two macros to help you:

#define Set_Bit(IntValue, BitNumber) IntValue = IntValue | (1<<BitNumber)
#define Clr_Bit(IntValue, BitNumber) IntValue = IntValue & (~((1) << (BitNumber))))

Some questions have discussed these before: Macros to set and clear bits

edited May 23 '17 at 12:20

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answered Aug 31 '12 at 00:01

Mahmoud Fayez

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How can I assign bit by bit to an integer in C?

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