1a47a12beSStefan Roese #ifndef _PPC_BYTEORDER_H 2a47a12beSStefan Roese #define _PPC_BYTEORDER_H 3a47a12beSStefan Roese 4a47a12beSStefan Roese #include <asm/types.h> 5a47a12beSStefan Roese 6a47a12beSStefan Roese #ifdef __GNUC__ 7a47a12beSStefan Roese 8*44d0677aSMåns Rullgård static __inline__ unsigned ld_le16(const volatile unsigned short *addr) 9a47a12beSStefan Roese { 10a47a12beSStefan Roese unsigned val; 11a47a12beSStefan Roese 12a47a12beSStefan Roese __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr)); 13a47a12beSStefan Roese return val; 14a47a12beSStefan Roese } 15a47a12beSStefan Roese 16*44d0677aSMåns Rullgård static __inline__ void st_le16(volatile unsigned short *addr, const unsigned val) 17a47a12beSStefan Roese { 18a47a12beSStefan Roese __asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr)); 19a47a12beSStefan Roese } 20a47a12beSStefan Roese 21*44d0677aSMåns Rullgård static __inline__ unsigned ld_le32(const volatile unsigned *addr) 22a47a12beSStefan Roese { 23a47a12beSStefan Roese unsigned val; 24a47a12beSStefan Roese 25a47a12beSStefan Roese __asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr)); 26a47a12beSStefan Roese return val; 27a47a12beSStefan Roese } 28a47a12beSStefan Roese 29*44d0677aSMåns Rullgård static __inline__ void st_le32(volatile unsigned *addr, const unsigned val) 30a47a12beSStefan Roese { 31a47a12beSStefan Roese __asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr)); 32a47a12beSStefan Roese } 33a47a12beSStefan Roese 34a47a12beSStefan Roese /* alas, egcs sounds like it has a bug in this code that doesn't use the 35a47a12beSStefan Roese inline asm correctly, and can cause file corruption. Until I hear that 36a47a12beSStefan Roese it's fixed, I can live without the extra speed. I hope. */ 37a47a12beSStefan Roese #if !(__GNUC__ >= 2 && __GNUC_MINOR__ >= 90) 38a47a12beSStefan Roese #if 0 39a47a12beSStefan Roese # define __arch_swab16(x) ld_le16(&x) 40a47a12beSStefan Roese # define __arch_swab32(x) ld_le32(&x) 41a47a12beSStefan Roese #else 42a47a12beSStefan Roese static __inline__ __attribute__((const)) __u16 ___arch__swab16(__u16 value) 43a47a12beSStefan Roese { 44a47a12beSStefan Roese __u16 result; 45a47a12beSStefan Roese 46a47a12beSStefan Roese __asm__("rlwimi %0,%1,8,16,23" 47a47a12beSStefan Roese : "=r" (result) 48a47a12beSStefan Roese : "r" (value), "0" (value >> 8)); 49a47a12beSStefan Roese return result; 50a47a12beSStefan Roese } 51a47a12beSStefan Roese 52a47a12beSStefan Roese static __inline__ __attribute__((const)) __u32 ___arch__swab32(__u32 value) 53a47a12beSStefan Roese { 54a47a12beSStefan Roese __u32 result; 55a47a12beSStefan Roese 56a47a12beSStefan Roese __asm__("rlwimi %0,%1,24,16,23\n\t" 57a47a12beSStefan Roese "rlwimi %0,%1,8,8,15\n\t" 58a47a12beSStefan Roese "rlwimi %0,%1,24,0,7" 59a47a12beSStefan Roese : "=r" (result) 60a47a12beSStefan Roese : "r" (value), "0" (value >> 24)); 61a47a12beSStefan Roese return result; 62a47a12beSStefan Roese } 63a47a12beSStefan Roese #define __arch__swab32(x) ___arch__swab32(x) 64a47a12beSStefan Roese #define __arch__swab16(x) ___arch__swab16(x) 65a47a12beSStefan Roese #endif /* 0 */ 66a47a12beSStefan Roese 67a47a12beSStefan Roese #endif 68a47a12beSStefan Roese 69a47a12beSStefan Roese /* The same, but returns converted value from the location pointer by addr. */ 70a47a12beSStefan Roese #define __arch__swab16p(addr) ld_le16(addr) 71a47a12beSStefan Roese #define __arch__swab32p(addr) ld_le32(addr) 72a47a12beSStefan Roese 73a47a12beSStefan Roese /* The same, but do the conversion in situ, ie. put the value back to addr. */ 74a47a12beSStefan Roese #define __arch__swab16s(addr) st_le16(addr,*addr) 75a47a12beSStefan Roese #define __arch__swab32s(addr) st_le32(addr,*addr) 76a47a12beSStefan Roese 77a47a12beSStefan Roese #endif /* __GNUC__ */ 78a47a12beSStefan Roese 79a47a12beSStefan Roese #if defined(__GNUC__) && !defined(__STRICT_ANSI__) 80a47a12beSStefan Roese #define __BYTEORDER_HAS_U64__ 81a47a12beSStefan Roese #endif 82a47a12beSStefan Roese #include <linux/byteorder/big_endian.h> 83a47a12beSStefan Roese 84a47a12beSStefan Roese #endif /* _PPC_BYTEORDER_H */ 85