projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #ifndef _PARISC_BYTEORDER_H |
| 2 | #define _PARISC_BYTEORDER_H | |
| 3 | ||
| 4 | #include <asm/types.h> | |
| 5 | #include <linux/compiler.h> | |
| 6 | ||
| 7 | #ifdef __GNUC__ | |
| 8 | ||
| 9 | static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 x) | |
| 10 | { | |
| 11 | __asm__("dep %0, 15, 8, %0\n\t" /* deposit 00ab -> 0bab */ | |
| 12 | "shd %%r0, %0, 8, %0" /* shift 000000ab -> 00ba */ | |
| 13 | : "=r" (x) | |
| 14 | : "0" (x)); | |
| 15 | return x; | |
| 16 | } | |
| 17 | ||
| 18 | static __inline__ __attribute_const__ __u32 ___arch__swab24(__u32 x) | |
| 19 | { | |
| 20 | __asm__("shd %0, %0, 8, %0\n\t" /* shift xabcxabc -> cxab */ | |
| 21 | "dep %0, 15, 8, %0\n\t" /* deposit cxab -> cbab */ | |
| 22 | "shd %%r0, %0, 8, %0" /* shift 0000cbab -> 0cba */ | |
| 23 | : "=r" (x) | |
| 24 | : "0" (x)); | |
| 25 | return x; | |
| 26 | } | |
| 27 | ||
| 28 | static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x) | |
| 29 | { | |
| 30 | unsigned int temp; | |
| 31 | __asm__("shd %0, %0, 16, %1\n\t" /* shift abcdabcd -> cdab */ | |
| 32 | "dep %1, 15, 8, %1\n\t" /* deposit cdab -> cbab */ | |
| 33 | "shd %0, %1, 8, %0" /* shift abcdcbab -> dcba */ | |
| 34 | : "=r" (x), "=&r" (temp) | |
| 35 | : "0" (x)); | |
| 36 | return x; | |
| 37 | } | |
| 38 | ||
| 39 | ||
| 40 | #if BITS_PER_LONG > 32 | |
| 41 | /* | |
| 42 | ** From "PA-RISC 2.0 Architecture", HP Professional Books. | |
| 43 | ** See Appendix I page 8 , "Endian Byte Swapping". | |
| 44 | ** | |
| 45 | ** Pretty cool algorithm: (* == zero'd bits) | |
| 46 | ** PERMH 01234567 -> 67452301 into %0 | |
| 47 | ** HSHL 67452301 -> 7*5*3*1* into %1 | |
| 48 | ** HSHR 67452301 -> *6*4*2*0 into %0 | |
| 49 | ** OR %0 | %1 -> 76543210 into %0 (all done!) | |
| 50 | */ | |
| 51 | static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 x) { | |
| 52 | __u64 temp; | |
| 53 | __asm__("permh,3210 %0, %0\n\t" | |
| 54 | "hshl %0, 8, %1\n\t" | |
| 55 | "hshr,u %0, 8, %0\n\t" | |
| 56 | "or %1, %0, %0" | |
| 57 | : "=r" (x), "=&r" (temp) | |
| 58 | : "0" (x)); | |
| 59 | return x; | |
| 60 | } | |
| 61 | #define __arch__swab64(x) ___arch__swab64(x) | |
| 62 | #define __BYTEORDER_HAS_U64__ | |
| 63 | #elif !defined(__STRICT_ANSI__) | |
| 64 | static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 x) | |
| 65 | { | |
| 66 | __u32 t1 = ___arch__swab32((__u32) x); | |
| 67 | __u32 t2 = ___arch__swab32((__u32) (x >> 32)); | |
| 68 | return (((__u64) t1 << 32) | t2); | |
| 69 | } | |
| 70 | #define __arch__swab64(x) ___arch__swab64(x) | |
| 71 | #define __BYTEORDER_HAS_U64__ | |
| 72 | #endif | |
| 73 | ||
| 74 | #define __arch__swab16(x) ___arch__swab16(x) | |
| 75 | #define __arch__swab24(x) ___arch__swab24(x) | |
| 76 | #define __arch__swab32(x) ___arch__swab32(x) | |
| 77 | ||
| 78 | #endif /* __GNUC__ */ | |
| 79 | ||
| 80 | #include <linux/byteorder/big_endian.h> | |
| 81 | ||
| 82 | #endif /* _PARISC_BYTEORDER_H */ |