/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_CRIS_ARCH_BITOPS_H #define _ASM_CRIS_ARCH_BITOPS_H /* * Helper functions for the core of the ff[sz] functions. They compute the * number of leading zeroes of a bits-in-byte, 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) { unsigned long res; __asm__ __volatile__ ("swapnwbr %0\n\t" "lz %0,%0" : "=r" (res) : "0" (w)); return res; } static inline unsigned long cris_swapwbrlz(unsigned long w) { unsigned long res; __asm__ __volatile__ ("swapwbr %0\n\t" "lz %0,%0" : "=r" (res) : "0" (w)); return res; } /* * Find First Zero in word. Undefined if no zero exist, so the caller should * check against ~0 first. */ static inline unsigned long ffz(unsigned long w) { return cris_swapnwbrlz(w); } /* * Find First Set bit in word. Undefined if no 1 exist, so the caller * should check against 0 first. */ static inline unsigned long __ffs(unsigned long w) { return cris_swapnwbrlz(~w); } /* * Find First Bit that is set. */ static inline unsigned long kernel_ffs(unsigned long w) { return w ? cris_swapwbrlz (w) + 1 : 0; } #endif /* _ASM_CRIS_ARCH_BITOPS_H */
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hwregs | Folder | 0755 |
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bitops.h | File | 1.29 KB | 0644 |
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bug.h | File | 1008 B | 0644 |
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cache.h | File | 601 B | 0644 |
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checksum.h | File | 807 B | 0644 |
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cryptocop.h | File | 4.25 KB | 0644 |
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delay.h | File | 649 B | 0644 |
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dma.h | File | 22 B | 0644 |
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intmem.h | File | 339 B | 0644 |
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irq.h | File | 3.55 KB | 0644 |
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irqflags.h | File | 1 KB | 0644 |
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memmap.h | File | 25 B | 0644 |
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mmu.h | File | 4.07 KB | 0644 |
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offset.h | File | 1.29 KB | 0644 |
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page.h | File | 660 B | 0644 |
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pgtable.h | File | 483 B | 0644 |
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processor.h | File | 1.52 KB | 0644 |
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swab.h | File | 517 B | 0644 |
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system.h | File | 803 B | 0644 |
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thread_info.h | File | 363 B | 0644 |
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timex.h | File | 852 B | 0644 |
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tlb.h | File | 453 B | 0644 |
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uaccess.h | File | 18.38 KB | 0644 |
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unistd.h | File | 4.58 KB | 0644 |
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