linux find first bit Linux中的find命令是一个非常实用的工具,可以帮助用户快速地查找文件和目录。而find命令的-mtime选项则可以用来查找指定日期之后被修改过的文件。在Linux操作系统中,查找第一个被修改过的文件是一个非常常见的需求,而使用find命令可以很方便地实现这个目的。 在Linux中,可以使用find命令结合-mtime...
extern unsigned long _find_first_bit(const unsigned long *addr, unsigned long size); extern unsigned long _find_first_zero_bit(const unsigned long *addr, unsigned long size); extern unsigned long _find_last_bit(const unsigned long *addr, unsigned long size); #ifndef find_next_bit /** @...
find_first_zero_bit在使用gcc 4.2.4 编译时,需要保护%eax find_first_zero_bit 修订后: /* * Find-bit routines.. */ extern __inline__ int find_first_zero_bit(void * addr, unsigned size) { int res; if (!size) return 0; __asm__ ("cld\n\t" "pushl %%eax\n\t" //fixed: "movl...
int find_first_zero_bit_set(int size) { int zero_bit = find_first_zero_bit(size); if (zero_bit != -1) { set_bit(zero_bit); } return zero_bit; } 整个实现很清爽,很容易维护。我在使用中还加入了序列化,文件锁的操作可以将位图同步到磁盘文件实现持久化,这里就不再赘述了。有一个问题,...
spin_lock(&bitmap->lock); *obj = find_next_zero_bit(bitmap->table, bitmap->max, bitmap->last);if(*obj >= bitmap->max) { bitmap->top = (bitmap->top + bitmap->max + bitmap->reserved_top) & bitmap->mask; *obj =find_first_zero_bit(bitmap->table, bitmap->max); ...
return cpumask_first_and(src1p, src2p); }static inline int cpumask_any_distribute(const struct cpumask *srcp) @@ -195,6 +201,19 @@ static inline unsigned int cpumask_first(const struct cpumask *srcp) return find_first_bit(cpumask_bits(srcp), nr_cpumask_bits); ...
Bit operation instructions such as find first bit instructions are provided. The instructions themselves include four instructions for returning a value corresponding to a bit position that stores the first zero or the first one in a memory location beginning from the left or right side of a data...
BitVector PR = MF.getFrameInfo()->getPristineRegs(MF);for(intI = PR.find_first(); I>0; I = PR.find_next(I)) setRegUsed(I); } 开发者ID:QEver,项目名称:llvm,代码行数:24,代码来源:RegisterScavenging.cpp 示例13: doMerge ▲点赞 1▼ ...
United States Application US20030005268 Note: If you have problems viewing the PDF, please make sure you have the latest version ofAdobe Acrobat. Back to full text
Finding the first bit that is set in an n-bit input word includes generating n n-bit patterns from an n-bit input word. If the bit at one bit position of the input word has a logic 1 value, a corresponding pattern has a logic 1 value in a corresponding bit position and in each ...