| wdenk | 10af385 | 2000-11-23 13:12:41 +0000 | [diff] [blame] | 1 | #ifndef _PPC_BYTEORDER_H |
| 2 | #define _PPC_BYTEORDER_H |
| 3 | |
| 4 | #include <asm/types.h> |
| 5 | |
| 6 | #ifdef __GNUC__ |
| 7 | |
| 8 | extern __inline__ unsigned ld_le16(const volatile unsigned short *addr) |
| 9 | { |
| 10 | unsigned val; |
| 11 | |
| 12 | __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr)); |
| 13 | return val; |
| 14 | } |
| 15 | |
| 16 | extern __inline__ void st_le16(volatile unsigned short *addr, const unsigned val) |
| 17 | { |
| 18 | __asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr)); |
| 19 | } |
| 20 | |
| 21 | extern __inline__ unsigned ld_le32(const volatile unsigned *addr) |
| 22 | { |
| 23 | unsigned val; |
| 24 | |
| 25 | __asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr)); |
| 26 | return val; |
| 27 | } |
| 28 | |
| 29 | extern __inline__ void st_le32(volatile unsigned *addr, const unsigned val) |
| 30 | { |
| 31 | __asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr)); |
| 32 | } |
| 33 | |
| 34 | /* alas, egcs sounds like it has a bug in this code that doesn't use the |
| 35 | inline asm correctly, and can cause file corruption. Until I hear that |
| 36 | it's fixed, I can live without the extra speed. I hope. */ |
| 37 | #if !(__GNUC__ >= 2 && __GNUC_MINOR__ >= 90) |
| 38 | #if 0 |
| 39 | # define __arch_swab16(x) ld_le16(&x) |
| 40 | # define __arch_swab32(x) ld_le32(&x) |
| 41 | #else |
| 42 | static __inline__ __const__ __u16 ___arch__swab16(__u16 value) |
| 43 | { |
| 44 | __u16 result; |
| 45 | |
| 46 | __asm__("rlwimi %0,%1,8,16,23" |
| 47 | : "=r" (result) |
| 48 | : "r" (value), "0" (value >> 8)); |
| 49 | return result; |
| 50 | } |
| 51 | |
| 52 | static __inline__ __const__ __u32 ___arch__swab32(__u32 value) |
| 53 | { |
| 54 | __u32 result; |
| 55 | |
| 56 | __asm__("rlwimi %0,%1,24,16,23\n\t" |
| 57 | "rlwimi %0,%1,8,8,15\n\t" |
| 58 | "rlwimi %0,%1,24,0,7" |
| 59 | : "=r" (result) |
| 60 | : "r" (value), "0" (value >> 24)); |
| 61 | return result; |
| 62 | } |
| 63 | #define __arch__swab32(x) ___arch__swab32(x) |
| 64 | #define __arch__swab16(x) ___arch__swab16(x) |
| 65 | #endif /* 0 */ |
| 66 | |
| 67 | #endif |
| 68 | |
| 69 | /* The same, but returns converted value from the location pointer by addr. */ |
| 70 | #define __arch__swab16p(addr) ld_le16(addr) |
| 71 | #define __arch__swab32p(addr) ld_le32(addr) |
| 72 | |
| 73 | /* The same, but do the conversion in situ, ie. put the value back to addr. */ |
| 74 | #define __arch__swab16s(addr) st_le16(addr,*addr) |
| 75 | #define __arch__swab32s(addr) st_le32(addr,*addr) |
| 76 | |
| 77 | #endif /* __GNUC__ */ |
| 78 | |
| 79 | #if defined(__GNUC__) && !defined(__STRICT_ANSI__) |
| 80 | #define __BYTEORDER_HAS_U64__ |
| 81 | #endif |
| 82 | #include <linux/byteorder/big_endian.h> |
| 83 | |
| 84 | #endif /* _PPC_BYTEORDER_H */ |