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 */
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 */
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#ifndef __ia32_MEMSTR_H__
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#ifndef __ia32_MEMSTR_H__
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#define __ia32_MEMSTR_H__
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#define __ia32_MEMSTR_H__
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extern void memsetw(__address dst, size_t cnt, __u16 x);
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extern void memsetb(__address dst, size_t cnt, __u8 x);
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/** Copy memory
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/** Copy memory
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 *
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 *
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 * Copy a given number of bytes (3rd argument)
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 * Copy a given number of bytes (3rd argument)
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 * from the memory location defined by 2nd argument
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 * from the memory location defined by 2nd argument
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 * to the memory location defined by 1st argument.
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 * to the memory location defined by 1st argument.
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        return dst;
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        return dst;
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}
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}
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/** Compare memory
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/** Compare memory regions for equality
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 *
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 *
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 * Compare a given number of bytes (3rd argument)
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 * Compare a given number of bytes (3rd argument)
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 * at memory locations defined by 1st and 2nd argument
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 * at memory locations defined by 1st and 2nd argument
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 * for equality. If memory is equal, returns 0.
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 * for equality. If bytes are equal function returns 0.
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 *
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 *
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 * @param pointer 1
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 * @param region 1
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 * @param pointer 2
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 * @param region 2
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 * @param number of bytes
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 * @param number of bytes
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 * @return 0 on match or non-zero if different
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 * @return zero if bytes are equal, non-zero otherwise
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 */
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 */
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static inline int memcmp(const void * mem1, const void * mem2, size_t cnt)
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static inline int memcmp(__address src, __address dst, size_t cnt)
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{
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{
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    __u32 d0, d1, d2;
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    __u32 d0, d1, d2;
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    int ret;
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    int ret;
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    __asm__ (
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    __asm__ (
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        "je 1f\n\t"
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        "je 1f\n\t"
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        "movl %3, %0\n\t"
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        "movl %3, %0\n\t"
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        "addl $1, %0\n\t"
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        "addl $1, %0\n\t"
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        "1:\n"
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        "1:\n"
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        : "=a" (ret), "=%S" (d0), "=&D" (d1), "=&c" (d2)
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        : "=a" (ret), "=%S" (d0), "=&D" (d1), "=&c" (d2)
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        : "0" (0), "1" (mem1), "2" (mem2), "3" (cnt)
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        : "0" (0), "1" (src), "2" (dst), "3" (cnt)
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    );
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    );
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    return ret;
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    return ret;
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}
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}
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/** Fill memory with words
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 * Fill a given number of words (2nd argument)
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 * at memory defined by 1st argument with the
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 * word value defined by 3rd argument.
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 *
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 * @param destination
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 * @param number of words
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 * @param value to fill
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 */
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static inline void memsetw(__address dst, size_t cnt, __u16 x)
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{
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    __u32 d0, d1;
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    __asm__ __volatile__ (
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        "rep stosw\n\t"
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        : "=&D" (d0), "=&c" (d1), "=a" (x)
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        : "0" (dst), "1" (cnt), "2" (x)
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        : "memory"
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    );
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}
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/** Fill memory with bytes
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 * Fill a given number of bytes (2nd argument)
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 * at memory defined by 1st argument with the
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 * word value defined by 3rd argument.
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 *
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 * @param destination
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 * @param number of bytes
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 * @param value to fill
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 */
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static inline void memsetb(__address dst, size_t cnt, __u8 x)
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{
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    __u32 d0, d1;
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    __asm__ __volatile__ (
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        "rep stosb\n\t"
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        : "=&D" (d0), "=&c" (d1), "=a" (x)
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        : "0" (dst), "1" (cnt), "2" (x)
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        : "memory"
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    );
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}
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#endif
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#endif