_llrotl - _llrotr -- Rotate Bits of Unsigned Long Long Integer

Format

#include <stdlib.h>   /* also in <builtin.h> */
unsigned long long _llrotl(unsigned long long value, int shift);
unsigned long long _llrotr(unsigned long long value, int shift);

Language Level: Extension
These functions take a 8-byte unsigned (long long) integer value and rotate it by shift bits. _llrotl rotates to the left, and _llrotr to the right.

Note: Both _llrotl and _llrotr are built-in functions, which means they are implemented as inline instructions and have no backing code in the library. For this reason:

Return Value
Both functions return the rotated value. There is no error return.

Example
This example uses _llrotr and _llrotl with different shift values to rotate the integer value 0x01234567:

#include <stdio.h>
#include <stdlib.h>
int main(void)
{
   unsigned long long val = 0x0123456789abcdefull;
   printf("The value of 0x%16.16llx rotated 4 bits to the left is 0x%16.16llx\n", val,
      _llrotl(val, 4));
   printf("The value of 0x%16.16llx rotated 16 bits to the right is 0x%16.16llx\n",
      val, _llrotr(val, 16));
   return 0;
   /**************************************************************************************
      The output should be:
      The value of 0x0123456789abcdef rotated 4 bits to the left is 0x123456789abcdef0
      The value of 0x0123456789abcdef rotated 16 bits to the right is 0xcdef0123456789ab
   **************************************************************************************/
}



_crotl - _crotr -- Rotate Bits of Character Value
_lrotl - _lrotr -- Rotate Bits of Unsigned Long Value
_rotl - _rotr -- Rotate Bits of Unsigned Integer
_srotl - _srotr -- Rotate Bits of Unsigned Short Value
swab -- Swap Adjacent Bytes
<builtin.h>
<stdlib.h>