1 #if defined __thumb__
2 
3 #include "../../string/strcpy.c"
4 
5 #else
6 
7 #include <string.h>
8 #include "xscale.h"
9 
10 char *
11 strcpy (char *dest, const char *src)
12 {
13   char *dest0 = dest;
14 
15   asm (PRELOADSTR ("%0") : : "r" (src));
16 
17 #ifndef __OPTIMIZE_SIZE__
18   if (((long)src & 3) == ((long)dest & 3))
19     {
20       /* Skip unaligned part.  */
21       while ((long)src & 3)
22 	{
23 	  if (! (*dest++ = *src++))
24 	    return dest0;
25 	}
26 
27   /* Load two constants:
28      R4 = 0xfefefeff [ == ~(0x80808080 << 1) ]
29      R5 = 0x80808080  */
30 
31   asm ("mov	r5, #0x80\n\
32 	ldr	r1, [%1, #0]\n\
33 	add	r5, r5, #0x8000\n\
34 	add	r5, r5, r5, lsl #16\n\
35 	mvn	r4, r5, lsl #1\n\
36 \n\
37 	add	r3, r1, r5\n\
38 	bic	r3, r3, r1\n\
39 	ands	r2, r3, r4\n\
40 	bne	1f\n\
41 0:\n\
42 	ldr	r3, [%1, #0]\n\
43 	ldr	r1, [%1, #4]!\n\
44 "	PRELOADSTR("%1") "\n\
45 	str	r3, [%0], #4\n\
46 	add	r2, r1, r4\n\
47 	bic	r2, r2, r1\n\
48 	ands	r3, r2, r5\n\
49 	beq	0b\n\
50 1:"
51        : "=&r" (dest), "=&r" (src)
52        : "0" (dest), "1" (src)
53        : "r1", "r2", "r3", "r4", "r5", "memory", "cc");
54     }
55 #endif
56 
57   while (*dest++ = *src++)
58     asm (PRELOADSTR ("%0") : : "r" (src));
59   return dest0;
60 }
61 
62 #endif
63