byteorder.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:2k
- #ifndef _PPC64_BYTEORDER_H
- #define _PPC64_BYTEORDER_H
- /*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- #include <asm/types.h>
- #ifdef __GNUC__
- static __inline__ __u16 ld_le16(const volatile __u16 *addr)
- {
- __u16 val;
- __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
- return val;
- }
- static __inline__ void st_le16(volatile __u16 *addr, const __u16 val)
- {
- __asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
- }
- static __inline__ __u32 ld_le32(const volatile __u32 *addr)
- {
- __u32 val;
- __asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
- return val;
- }
- static __inline__ void st_le32(volatile __u32 *addr, const __u32 val)
- {
- __asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
- }
- #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,%1,24,16,23nt"
- "rlwimi %0,%1,8,8,15nt"
- "rlwimi %0,%1,24,0,7"
- : "=r" (result)
- : "r" (value), "0" (value >> 24));
- return result;
- }
- static __inline__ __const__ __u64 ___arch__swab64(__u64 value)
- {
- __u64 result;
- #error implement me
- }
- #define __arch__swab16(x) ___arch__swab16(x)
- #define __arch__swab32(x) ___arch__swab32(x)
- #define __arch__swab64(x) ___arch__swab64(x)
- #endif
- /* 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 /* __GNUC__ */
- /* MIKEC: What does __BYTEORDER_HAS_U64__ mean? */
- #ifndef __STRICT_ANSI__
- #define __BYTEORDER_HAS_U64__
- #endif
- #include <linux/byteorder/big_endian.h>
- #endif /* _PPC64_BYTEORDER_H */