strlen.h

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#ifndef _STRLEN_H_
#define _STRLEN_H_

#include <nlibc.h>
#include <stddef.h>     /* for size_t */

/*----------------------------------------------------------------------
|  NAME
|         strlen - calculate the length of a string
|  
|  SYNOPSIS
|         #include <string.h>
|  
|         size_t strlen(const char *s);
|  
|  DESCRIPTION
|         The  strlen() function calculates the length of the string
|         s, not including the terminating `\0' character.
|  
|  RETURN VALUE
|         The strlen() function returns the number of characters  in
|         s.
|  
|  CONFORMING TO
|         SVID 3, POSIX, BSD 4.3, ISO 9899
|  
|  SEE ALSO
|         string(3)
|  
+----------------------------------------------------------------------*/
#ifndef __HAS_MAIN
extern size_t strlen( const char *s );
#else
#if !defined(__cflow_processed) || defined(_uses_strlen_strlen_h)
size_t strlen( const char *s )
{
    unsigned *p = (unsigned *)s;
    int a,c,cr=0;
    unsigned mask;
    int one = 1,shft= -8;
    
    if( ! (a=*p) ) return 0;

    do {
        mask = 0xff;
        c=0;
        do { 
            unsigned u = a & mask;
            #pragma vectorcond
            where( u ) 
               c++;
            mask >>= shft;
        } while( mask );
        a = *(++p);
        {  
            int hi,lo; 
            asm("\tlutcross.L %0 %1\n\tatr.H %0 $ZERO" : "=r" (hi) : "r" (c));
            asm("\tlutmove.L %0 %1\n\tatr.H %0 $ZERO" : "=r" (lo) : "r" (c));
            cr += hi + lo;
        }
      } while( a );
      return cr;
}
#endif
#endif // Has Main

#endif

---