[U-Boot] [PATCH 1/3] memcpy: use 32-bit copies if possible

[Alessandro Rubini <rubini-list@gnudd.com>]

I was making my v2, and I found a problem wrt:

> while 64bit isnt in today, might as well avoid unclean code from the start
> when possible.  in other words, used "unsigned int" rather than "u32" and cast
> to "unsigned long" rather than "int".

Since int is 32 also on 64bit systems, I used unsigned long.
For memcpy all is well, for memset I have this problem:

    void * memset(void * s,int c,size_t count)
    {
    	char *xs = (char *) s;
    	unsigned long *sl = (unsigned long *) s;
    	unsigned long cl;

    	/* do it one word at a time (32 bits or 64 bits) if possible */
    	if ( ((count | (int)s) & (sizeof(long) - 1)) == 0) {
    		count /= sizeof(long);
    		cl = (c & 0xff) | ((c & 0xff) << 8);
    		cl |= cl << 16;
    		if (sizeof(long) > 4)
    			cl |= cl << 32;
    		while (count--)
    			*sl++ = cl;
    		return s;
    	}
    	/* else, fill 8 bits@a time */
    	while (count--)
    		*xs++ = c;

    	return s;
    }

string.c:416: warning: left shift count >= width of type

(obviously there is no such shift in the generated code,
since the condition is false at compile time).

I think I'll stick to u32 for memset, unless I get better suggestions.

/alessandro