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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1428 | serge | 1 | #ifndef _LINUX_UNALIGNED_GENERIC_H |
| 2 | #define _LINUX_UNALIGNED_GENERIC_H |
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| 3 | |||
| 4 | /* |
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| 5 | * Cause a link-time error if we try an unaligned access other than |
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| 6 | * 1,2,4 or 8 bytes long |
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| 7 | */ |
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| 8 | extern void __bad_unaligned_access_size(void); |
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| 9 | |||
| 10 | #define __get_unaligned_le(ptr) ((__force typeof(*(ptr)))({ \ |
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| 11 | __builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \ |
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| 12 | __builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_le16((ptr)), \ |
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| 13 | __builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_le32((ptr)), \ |
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| 14 | __builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_le64((ptr)), \ |
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| 15 | __bad_unaligned_access_size())))); \ |
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| 16 | })) |
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| 17 | |||
| 18 | #define __get_unaligned_be(ptr) ((__force typeof(*(ptr)))({ \ |
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| 19 | __builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \ |
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| 20 | __builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_be16((ptr)), \ |
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| 21 | __builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_be32((ptr)), \ |
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| 22 | __builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_be64((ptr)), \ |
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| 23 | __bad_unaligned_access_size())))); \ |
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| 24 | })) |
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| 25 | |||
| 26 | #define __put_unaligned_le(val, ptr) ({ \ |
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| 27 | void *__gu_p = (ptr); \ |
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| 28 | switch (sizeof(*(ptr))) { \ |
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| 29 | case 1: \ |
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| 30 | *(u8 *)__gu_p = (__force u8)(val); \ |
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| 31 | break; \ |
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| 32 | case 2: \ |
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| 33 | put_unaligned_le16((__force u16)(val), __gu_p); \ |
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| 34 | break; \ |
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| 35 | case 4: \ |
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| 36 | put_unaligned_le32((__force u32)(val), __gu_p); \ |
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| 37 | break; \ |
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| 38 | case 8: \ |
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| 39 | put_unaligned_le64((__force u64)(val), __gu_p); \ |
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| 40 | break; \ |
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| 41 | default: \ |
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| 42 | __bad_unaligned_access_size(); \ |
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| 43 | break; \ |
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| 44 | } \ |
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| 45 | (void)0; }) |
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| 46 | |||
| 47 | #define __put_unaligned_be(val, ptr) ({ \ |
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| 48 | void *__gu_p = (ptr); \ |
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| 49 | switch (sizeof(*(ptr))) { \ |
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| 50 | case 1: \ |
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| 51 | *(u8 *)__gu_p = (__force u8)(val); \ |
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| 52 | break; \ |
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| 53 | case 2: \ |
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| 54 | put_unaligned_be16((__force u16)(val), __gu_p); \ |
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| 55 | break; \ |
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| 56 | case 4: \ |
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| 57 | put_unaligned_be32((__force u32)(val), __gu_p); \ |
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| 58 | break; \ |
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| 59 | case 8: \ |
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| 60 | put_unaligned_be64((__force u64)(val), __gu_p); \ |
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| 61 | break; \ |
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| 62 | default: \ |
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| 63 | __bad_unaligned_access_size(); \ |
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| 64 | break; \ |
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| 65 | } \ |
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| 66 | (void)0; }) |
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| 67 | |||
| 68 | #endif /* _LINUX_UNALIGNED_GENERIC_H */ |