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1efe4ce3 SM |
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 */ |