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Top Forums Programming c program to set the m-bit to n-bit Post 302602038 by alister on Saturday 25th of February 2012 04:27:42 PM
Old 02-25-2012
Quote:
Originally Posted by acdc
I have a 32bit number and without using for loop, I want to set mbit to n bit.
...
I assume m<n.
I don't think anyone understood your question, since the suggestions proffered do not reflect what I consider to be the two likeliest interpretations.

Are you trying to set the value of the bit at index m equal to the value of the bit at index n? Or are you trying to set all bits from index m to index n to 1? Or something else entirely?

Why are you not able to use a for loop?

Regards,
Alister
 

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atomic_bits(3C) 														   atomic_bits(3C)

NAME
atomic_bits, atomic_set_long_excl, atomic_clear_long_excl - atomic set and clear bit operations SYNOPSIS
#include <atomic.h> int atomic_set_long_excl(volatile ulong_t *target, uint_t bit); int atomic_clear_long_excl(volatile ulong_t *target, uint_t bit); The atomic_set_long_excl() and atomic_clear_long_excl() functions perform an exclusive atomic bit set or clear operation on target. The value of bit specifies the number of the bit to be modified within target. Bits are numbered from zero to one less than the maximum number of bits in a long. If the value of bit falls outside of this range, the result of the operation is undefined. The atomic_set_long_excl() and atomic_clear_long_excl() functions return 0 if bit was successfully set or cleared. They return -1 if bit was already set or cleared. No errors are defined. See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Stable | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ atomic_add(3C), atomic_and(3C), atomic_cas(3C), atomic_dec(3C), atomic_inc(3C), atomic_or(3C), atomic_swap(3C), membar_ops(3C), attributes(5), atomic_ops(9F) 13 May 2005 atomic_bits(3C)
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