_irol_

#include <intrins.h>

unsigned int _irol_ (
  unsigned int i,        /* integer to rotate left */
  unsigned char b);      /* bit positions to rotate */

The _irol_ routine rotates the bit pattern for the integer i left b bits. This routine is implemented as an intrinsic function.

The _irol_ routine returns the rotated value of i.

_crol_, _cror_, _iror_, _lrol_, _lror_

#include <intrins.h>

void test_irol (void) {
  int a;
  int b;

  a = 0xA5A5;
  b = _irol_(a,3);     /* b now is 0x2D2D */
}