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/* * BK Id: SCCS/s.byteorder.h 1.8 10/11/01 13:02:49 trini */ #ifndef _PPC_BYTEORDER_H #define _PPC_BYTEORDER_H #include <asm/types.h> #ifdef __GNUC__ #ifdef __KERNEL__ extern __inline__ unsigned ld_le16(const volatile unsigned short *addr) { unsigned val; __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr)); return val; } extern __inline__ void st_le16(volatile unsigned short *addr, const unsigned val) { __asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr)); } extern __inline__ unsigned ld_le32(const volatile unsigned *addr) { unsigned val; __asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr)); return val; } extern __inline__ void st_le32(volatile unsigned *addr, const unsigned val) { __asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr)); } /* alas, egcs sounds like it has a bug in this code that doesn't use the inline asm correctly, and can cause file corruption. Until I hear that it's fixed, I can live without the extra speed. I hope. */ #if 0 static __inline__ __const__ __u16 ___arch__swab16(__u16 value) { __u16 result; __asm__("rlwimi %0,%1,8,16,23" : "=r" (result) : "r" (value), "0" (value >> 8)); return result; } static __inline__ __const__ __u32 ___arch__swab32(__u32 value) { __u32 result; __asm__("rlwimi %0,%1,24,16,23\n\t" "rlwimi %0,%1,8,8,15\n\t" "rlwimi %0,%1,24,0,7" : "=r" (result) : "r" (value), "0" (value >> 24)); return result; } #define __arch__swab32(x) ___arch__swab32(x) #define __arch__swab16(x) ___arch__swab16(x) #endif /* 0 */ /* The same, but returns converted value from the location pointer by addr. */ #define __arch__swab16p(addr) ld_le16(addr) #define __arch__swab32p(addr) ld_le32(addr) /* The same, but do the conversion in situ, ie. put the value back to addr. */ #define __arch__swab16s(addr) st_le16(addr,*addr) #define __arch__swab32s(addr) st_le32(addr,*addr) #endif /* __KERNEL__ */ #if !defined(__STRICT_ANSI__) || defined(__KERNEL__) # define __BYTEORDER_HAS_U64__ # define __SWAB_64_THRU_32__ #endif #endif /* __GNUC__ */ #include <linux/byteorder/big_endian.h> #endif /* _PPC_BYTEORDER_H */ |