Merge branch 'for-rmk/samsung6' of git://git.fluff.org/bjdooks/linux into devel-stable
[linux-2.6.git] / arch / sh / include / asm / cmpxchg-grb.h
1 #ifndef __ASM_SH_CMPXCHG_GRB_H
2 #define __ASM_SH_CMPXCHG_GRB_H
3
4 static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
5 {
6         unsigned long retval;
7
8         __asm__ __volatile__ (
9                 "   .align 2              \n\t"
10                 "   mova    1f,   r0      \n\t" /* r0 = end point */
11                 "   nop                   \n\t"
12                 "   mov    r15,   r1      \n\t" /* r1 = saved sp */
13                 "   mov    #-4,   r15     \n\t" /* LOGIN */
14                 "   mov.l  @%1,   %0      \n\t" /* load  old value */
15                 "   mov.l   %2,   @%1     \n\t" /* store new value */
16                 "1: mov     r1,   r15     \n\t" /* LOGOUT */
17                 : "=&r" (retval),
18                   "+r"  (m)
19                 : "r"   (val)
20                 : "memory", "r0", "r1");
21
22         return retval;
23 }
24
25 static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val)
26 {
27         unsigned long retval;
28
29         __asm__ __volatile__ (
30                 "   .align  2             \n\t"
31                 "   mova    1f,   r0      \n\t" /* r0 = end point */
32                 "   mov    r15,   r1      \n\t" /* r1 = saved sp */
33                 "   mov    #-6,   r15     \n\t" /* LOGIN */
34                 "   mov.b  @%1,   %0      \n\t" /* load  old value */
35                 "   extu.b  %0,   %0      \n\t" /* extend as unsigned */
36                 "   mov.b   %2,   @%1     \n\t" /* store new value */
37                 "1: mov     r1,   r15     \n\t" /* LOGOUT */
38                 : "=&r" (retval),
39                   "+r"  (m)
40                 : "r"   (val)
41                 : "memory" , "r0", "r1");
42
43         return retval;
44 }
45
46 static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old,
47                                           unsigned long new)
48 {
49         unsigned long retval;
50
51         __asm__ __volatile__ (
52                 "   .align  2             \n\t"
53                 "   mova    1f,   r0      \n\t" /* r0 = end point */
54                 "   nop                   \n\t"
55                 "   mov    r15,   r1      \n\t" /* r1 = saved sp */
56                 "   mov    #-8,   r15     \n\t" /* LOGIN */
57                 "   mov.l  @%1,   %0      \n\t" /* load  old value */
58                 "   cmp/eq  %0,   %2      \n\t"
59                 "   bf            1f      \n\t" /* if not equal */
60                 "   mov.l   %2,   @%1     \n\t" /* store new value */
61                 "1: mov     r1,   r15     \n\t" /* LOGOUT */
62                 : "=&r" (retval),
63                   "+r"  (m)
64                 : "r"   (new)
65                 : "memory" , "r0", "r1", "t");
66
67         return retval;
68 }
69
70 #endif /* __ASM_SH_CMPXCHG_GRB_H */