diff options
Diffstat (limited to 'include/asm-v850')
| -rw-r--r-- | include/asm-v850/bitops.h | 220 |
1 files changed, 11 insertions, 209 deletions
diff --git a/include/asm-v850/bitops.h b/include/asm-v850/bitops.h index 44d596e..1f6fd5a 100644 --- a/include/asm-v850/bitops.h +++ b/include/asm-v850/bitops.h @@ -22,25 +22,11 @@ #ifdef __KERNEL__ -/* - * The __ functions are not atomic - */ +#include <asm-generic/bitops/ffz.h> /* - * ffz = Find First Zero in word. Undefined if no zero exists, - * so code should check against ~0UL first.. + * The __ functions are not atomic */ -static inline unsigned long ffz (unsigned long word) -{ - unsigned long result = 0; - - while (word & 1) { - result++; - word >>= 1; - } - return result; -} - /* In the following constant-bit-op macros, a "g" constraint is used when we really need an integer ("i" constraint). This is to avoid @@ -153,203 +139,19 @@ static inline int __test_bit (int nr, const void *addr) #define smp_mb__before_clear_bit() barrier () #define smp_mb__after_clear_bit() barrier () +#include <asm-generic/bitops/ffs.h> +#include <asm-generic/bitops/fls.h> +#include <asm-generic/bitops/fls64.h> +#include <asm-generic/bitops/__ffs.h> +#include <asm-generic/bitops/find.h> +#include <asm-generic/bitops/sched.h> +#include <asm-generic/bitops/hweight.h> -#define find_first_zero_bit(addr, size) \ - find_next_zero_bit ((addr), (size), 0) - -static inline int find_next_zero_bit(const void *addr, int size, int offset) -{ - unsigned long *p = ((unsigned long *) addr) + (offset >> 5); - unsigned long result = offset & ~31UL; - unsigned long tmp; - - if (offset >= size) - return size; - size -= result; - offset &= 31UL; - if (offset) { - tmp = * (p++); - tmp |= ~0UL >> (32-offset); - if (size < 32) - goto found_first; - if (~tmp) - goto found_middle; - size -= 32; - result += 32; - } - while (size & ~31UL) { - if (~ (tmp = * (p++))) - goto found_middle; - result += 32; - size -= 32; - } - if (!size) - return result; - tmp = *p; - - found_first: - tmp |= ~0UL << size; - found_middle: - return result + ffz (tmp); -} - - -/* This is the same as generic_ffs, but we can't use that because it's - inline and the #include order mucks things up. */ -static inline int generic_ffs_for_find_next_bit(int x) -{ - int r = 1; - - if (!x) - return 0; - if (!(x & 0xffff)) { - x >>= 16; - r += 16; - } - if (!(x & 0xff)) { - x >>= 8; - r += 8; - } - if (!(x & 0xf)) { - x >>= 4; - r += 4; - } - if (!(x & 3)) { - x >>= 2; - r += 2; - } - if (!(x & 1)) { - x >>= 1; - r += 1; - } - return r; -} - -/* - * Find next one bit in a bitmap reasonably efficiently. - */ -static __inline__ unsigned long find_next_bit(const unsigned long *addr, - unsigned long size, unsigned long offset) -{ - unsigned int *p = ((unsigned int *) addr) + (offset >> 5); - unsigned int result = offset & ~31UL; - unsigned int tmp; - - if (offset >= size) - return size; - size -= result; - offset &= 31UL; - if (offset) { - tmp = *p++; - tmp &= ~0UL << offset; - if (size < 32) - goto found_first; - if (tmp) - goto found_middle; - size -= 32; - result += 32; - } - while (size >= 32) { - if ((tmp = *p++) != 0) - goto found_middle; - result += 32; - size -= 32; - } - if (!size) - return result; - tmp = *p; - -found_first: - tmp &= ~0UL >> (32 - size); - if (tmp == 0UL) /* Are any bits set? */ - return result + size; /* Nope. */ -found_middle: - return result + generic_ffs_for_find_next_bit(tmp); -} - -/* - * find_first_bit - find the first set bit in a memory region - */ -#define find_first_bit(addr, size) \ - find_next_bit((addr), (size), 0) - - -#define ffs(x) generic_ffs (x) -#define fls(x) generic_fls (x) -#define fls64(x) generic_fls64(x) -#define __ffs(x) ffs(x) - - -/* - * This is just `generic_ffs' from <linux/bitops.h>, except that it assumes - * that at least one bit is set, and returns the real index of the bit - * (rather than the bit index + 1, like ffs does). - */ -static inline int sched_ffs(int x) -{ - int r = 0; - - if (!(x & 0xffff)) { - x >>= 16; - r += 16; - } - if (!(x & 0xff)) { - x >>= 8; - r += 8; - } - if (!(x & 0xf)) { - x >>= 4; - r += 4; - } - if (!(x & 3)) { - x >>= 2; - r += 2; - } - if (!(x & 1)) { - x >>= 1; - r += 1; - } - return r; -} - -/* - * Every architecture must define this function. It's the fastest - * way of searching a 140-bit bitmap where the first 100 bits are - * unlikely to be set. It's guaranteed that at least one of the 140 - * bits is set. - */ -static inline int sched_find_first_bit(unsigned long *b) -{ - unsigned offs = 0; - while (! *b) { - b++; - offs += 32; - } - return sched_ffs (*b) + offs; -} - -/* - * hweightN: returns the hamming weight (i.e. the number - * of bits set) of a N-bit word - */ -#define hweight32(x) generic_hweight32 (x) -#define hweight16(x) generic_hweight16 (x) -#define hweight8(x) generic_hweight8 (x) - -#define ext2_set_bit __test_and_set_bit +#include <asm-generic/bitops/ext2-non-atomic.h> #define ext2_set_bit_atomic(l,n,a) test_and_set_bit(n,a) -#define ext2_clear_bit __test_and_clear_bit #define ext2_clear_bit_atomic(l,n,a) test_and_clear_bit(n,a) -#define ext2_test_bit test_bit -#define ext2_find_first_zero_bit find_first_zero_bit -#define ext2_find_next_zero_bit find_next_zero_bit -/* Bitmap functions for the minix filesystem. */ -#define minix_test_and_set_bit __test_and_set_bit -#define minix_set_bit __set_bit -#define minix_test_and_clear_bit __test_and_clear_bit -#define minix_test_bit test_bit -#define minix_find_first_zero_bit find_first_zero_bit +#include <asm-generic/bitops/minix.h> #endif /* __KERNEL__ */ |
