1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
/* { dg-do compile } */
/* { dg-require-effective-target fpic } */
/* { dg-options "-O2 -fPIC" } */
typedef unsigned int size_t;
char *
__mempcpy_by2 (char *__dest, __const char *__src, size_t __srclen)
{
register char *__tmp = __dest;
register unsigned long int __d0, __d1;
__asm__ __volatile__
("shrl $1,%3\n\t"
"jz 2f\n"
"1:\n\t"
"movl (%2),%0\n\t"
"leal 4(%2),%2\n\t"
"movl %0,(%1)\n\t"
"leal 4(%1),%1\n\t"
"decl %3\n\t"
"jnz 1b\n"
"2:\n\t"
"movw (%2),%w0\n\t"
"movw %w0,(%1)"
: "=&q" (__d0), "=r" (__tmp), "=&r" (__src), "=&r" (__d1),
"=m" ( *(struct { __extension__ char __x[__srclen]; } *)__dest)
: "1" (__tmp), "2" (__src), "3" (__srclen / 2),
"m" ( *(struct { __extension__ char __x[__srclen]; } *)__src)
: "cc");
return __tmp + 2;
}
|