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void func(int si_a;
, int si_b;
int sresult;

void func(void) {
  /* Initialize si_a and si_b */
  int sresult = si_a << si_b;

  /* ... */
}

void func(unsigned int ui_a;
, unsigned int ui_b;
unsigned int uresult;

void func(void) {
  /*unsigned Initialize ui_a and ui_b */
  int uresult = ui_a << ui_b;

  /* ... */
}

#include <limits.h>
 
void func(unsigned int ui_a;
, unsigned int ui_b;
unsigned int uresult;

void func(void) {
  /*unsigned Initializeint ui_auresult and ui_b */= 0;
  if (ui_b >= UWIDTH( unsigned int, UINT_MAX)) {
    /* Handle error condition */
  } else {
    uresult = ui_a << ui_b;
  }

  /* ... */
}

void func(unsigned int ui_a;
, unsigned int ui_b;
unsigned int uresult;

void func(void) {
  /*unsigned Initialize ui_a and ui_b */
  int uresult = ui_a >> ui_b;

  /* ... */
}

#include <limits.h>
 
void func(unsigned int ui_a;
, unsigned int ui_b;
unsigned int uresult;

void func(void) {
  /*unsigned Initializeint ui_auresult and ui_b */= 0;
  if (ui_b >= UWIDTH( unsigned int, UINT_MAX)) {
    /* Handle error condition */
  } else {
    uresult = ui_a >> ui_b;
  }
  /* ... */
}

// 64 -bit shifts on IA-32 platforms become
sh[rl]dl  %eax, %edx
sa[rl]l   %cl, %eax