diff options
Diffstat (limited to 'arch/ppc64/kernel/bitops.c')
-rw-r--r-- | arch/ppc64/kernel/bitops.c | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/arch/ppc64/kernel/bitops.c b/arch/ppc64/kernel/bitops.c deleted file mode 100644 index ae329e8b4acb..000000000000 --- a/arch/ppc64/kernel/bitops.c +++ /dev/null @@ -1,147 +0,0 @@ -/* - * These are too big to be inlined. - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/bitops.h> -#include <asm/byteorder.h> - -unsigned long find_next_zero_bit(const unsigned long *addr, unsigned long size, - unsigned long offset) -{ - const unsigned long *p = addr + (offset >> 6); - unsigned long result = offset & ~63UL; - unsigned long tmp; - - if (offset >= size) - return size; - size -= result; - offset &= 63UL; - if (offset) { - tmp = *(p++); - tmp |= ~0UL >> (64 - offset); - if (size < 64) - goto found_first; - if (~tmp) - goto found_middle; - size -= 64; - result += 64; - } - while (size & ~63UL) { - if (~(tmp = *(p++))) - goto found_middle; - result += 64; - size -= 64; - } - if (!size) - return result; - tmp = *p; - -found_first: - tmp |= ~0UL << size; - if (tmp == ~0UL) /* Are any bits zero? */ - return result + size; /* Nope. */ -found_middle: - return result + ffz(tmp); -} - -EXPORT_SYMBOL(find_next_zero_bit); - -unsigned long find_next_bit(const unsigned long *addr, unsigned long size, - unsigned long offset) -{ - const unsigned long *p = addr + (offset >> 6); - unsigned long result = offset & ~63UL; - unsigned long tmp; - - if (offset >= size) - return size; - size -= result; - offset &= 63UL; - if (offset) { - tmp = *(p++); - tmp &= (~0UL << offset); - if (size < 64) - goto found_first; - if (tmp) - goto found_middle; - size -= 64; - result += 64; - } - while (size & ~63UL) { - if ((tmp = *(p++))) - goto found_middle; - result += 64; - size -= 64; - } - if (!size) - return result; - tmp = *p; - -found_first: - tmp &= (~0UL >> (64 - size)); - if (tmp == 0UL) /* Are any bits set? */ - return result + size; /* Nope. */ -found_middle: - return result + __ffs(tmp); -} - -EXPORT_SYMBOL(find_next_bit); - -static inline unsigned int ext2_ilog2(unsigned int x) -{ - int lz; - - asm("cntlzw %0,%1": "=r"(lz):"r"(x)); - return 31 - lz; -} - -static inline unsigned int ext2_ffz(unsigned int x) -{ - u32 rc; - if ((x = ~x) == 0) - return 32; - rc = ext2_ilog2(x & -x); - return rc; -} - -unsigned long find_next_zero_le_bit(const unsigned long *addr, unsigned long size, - unsigned long offset) -{ - const unsigned int *p = ((const unsigned int *)addr) + (offset >> 5); - unsigned int result = offset & ~31; - unsigned int tmp; - - if (offset >= size) - return size; - size -= result; - offset &= 31; - if (offset) { - tmp = cpu_to_le32p(p++); - tmp |= ~0U >> (32 - offset); /* bug or feature ? */ - if (size < 32) - goto found_first; - if (tmp != ~0) - goto found_middle; - size -= 32; - result += 32; - } - while (size >= 32) { - if ((tmp = cpu_to_le32p(p++)) != ~0) - goto found_middle; - result += 32; - size -= 32; - } - if (!size) - return result; - tmp = cpu_to_le32p(p); -found_first: - tmp |= ~0 << size; - if (tmp == ~0) /* Are any bits zero? */ - return result + size; /* Nope. */ -found_middle: - return result + ext2_ffz(tmp); -} - -EXPORT_SYMBOL(find_next_zero_le_bit); |