diff options
Diffstat (limited to 'ANDROID_3.4.5/include/asm-generic/bitops/__ffs.h')
-rw-r--r-- | ANDROID_3.4.5/include/asm-generic/bitops/__ffs.h | 43 |
1 files changed, 0 insertions, 43 deletions
diff --git a/ANDROID_3.4.5/include/asm-generic/bitops/__ffs.h b/ANDROID_3.4.5/include/asm-generic/bitops/__ffs.h deleted file mode 100644 index 937d7c43..00000000 --- a/ANDROID_3.4.5/include/asm-generic/bitops/__ffs.h +++ /dev/null @@ -1,43 +0,0 @@ -#ifndef _ASM_GENERIC_BITOPS___FFS_H_ -#define _ASM_GENERIC_BITOPS___FFS_H_ - -#include <asm/types.h> - -/** - * __ffs - find first bit in word. - * @word: The word to search - * - * Undefined if no bit exists, so code should check against 0 first. - */ -static __always_inline unsigned long __ffs(unsigned long word) -{ - int num = 0; - -#if BITS_PER_LONG == 64 - if ((word & 0xffffffff) == 0) { - num += 32; - word >>= 32; - } -#endif - if ((word & 0xffff) == 0) { - num += 16; - word >>= 16; - } - if ((word & 0xff) == 0) { - num += 8; - word >>= 8; - } - if ((word & 0xf) == 0) { - num += 4; - word >>= 4; - } - if ((word & 0x3) == 0) { - num += 2; - word >>= 2; - } - if ((word & 0x1) == 0) - num += 1; - return num; -} - -#endif /* _ASM_GENERIC_BITOPS___FFS_H_ */ |