1#ifndef _PPC_BYTEORDER_H 2#define _PPC_BYTEORDER_H 3 4#include <asm/types.h> 5 6#ifdef __GNUC__ 7 8static __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 16static __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 21static __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 29static __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 42static __inline__ __attribute__((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 52static __inline__ __attribute__((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 */ 85