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static inline u32_t save_edx(void)
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static inline u32_t save_edx(void)
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{
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{
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  u32_t val;
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  u32_t val;
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  asm volatile ("mov %0, edx":"=r"(val));
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  asm volatile ("movl %%edx, %0":"=r"(val));
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  return val;
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  return val;
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};
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};
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static inline void restore_edx(u32_t val)
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static inline void restore_edx(u32_t val)
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static inline int to_order(count_t arg)
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static inline int to_order(count_t arg)
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{
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{
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  int n;
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  int n;
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  asm volatile (
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  asm volatile (
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                "xor eax, eax \n\t"
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                "xorl %eax, %eax \n\t"
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                "bsr eax, edx \n\t"
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                "bsr %edx, %eax \n\t"
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                "inc eax"
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                "incl %eax"
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                :"=a" (n)
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                :"=a" (n)
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                :"d"(arg)
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                :"d"(arg)
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                );
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                );
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	return n;
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	return n;
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}
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}