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Diffstat (limited to 'include/asm-cris/arch-v10/bitops.h')
-rw-r--r-- | include/asm-cris/arch-v10/bitops.h | 73 |
1 files changed, 0 insertions, 73 deletions
diff --git a/include/asm-cris/arch-v10/bitops.h b/include/asm-cris/arch-v10/bitops.h deleted file mode 100644 index be85f6de25d..00000000000 --- a/include/asm-cris/arch-v10/bitops.h +++ /dev/null @@ -1,73 +0,0 @@ -/* asm/arch/bitops.h for Linux/CRISv10 */ - -#ifndef _CRIS_ARCH_BITOPS_H -#define _CRIS_ARCH_BITOPS_H - -/* - * Helper functions for the core of the ff[sz] functions, wrapping the - * syntactically awkward asms. The asms compute the number of leading - * zeroes of a bits-in-byte and byte-in-word and word-in-dword-swapped - * number. They differ in that the first function also inverts all bits - * in the input. - */ -static inline unsigned long cris_swapnwbrlz(unsigned long w) -{ - /* Let's just say we return the result in the same register as the - input. Saying we clobber the input but can return the result - in another register: - ! __asm__ ("swapnwbr %2\n\tlz %2,%0" - ! : "=r,r" (res), "=r,X" (dummy) : "1,0" (w)); - confuses gcc (sched.c, gcc from cris-dist-1.14). */ - - unsigned long res; - __asm__ ("swapnwbr %0 \n\t" - "lz %0,%0" - : "=r" (res) : "0" (w)); - return res; -} - -static inline unsigned long cris_swapwbrlz(unsigned long w) -{ - unsigned res; - __asm__ ("swapwbr %0 \n\t" - "lz %0,%0" - : "=r" (res) - : "0" (w)); - return res; -} - -/* - * ffz = Find First Zero in word. Undefined if no zero exists, - * so code should check against ~0UL first.. - */ -static inline unsigned long ffz(unsigned long w) -{ - return cris_swapnwbrlz(w); -} - -/** - * __ffs - find first bit in word. - * @word: The word to search - * - * Undefined if no bit exists, so code should check against 0 first. - */ -static inline unsigned long __ffs(unsigned long word) -{ - return cris_swapnwbrlz(~word); -} - -/** - * ffs - find first bit set - * @x: the word to search - * - * This is defined the same way as - * the libc and compiler builtin ffs routines, therefore - * differs in spirit from the above ffz (man ffs). - */ - -static inline unsigned long kernel_ffs(unsigned long w) -{ - return w ? cris_swapwbrlz (w) + 1 : 0; -} - -#endif |