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11/17/2022 06:42:15 AM
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Kbuild
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asm-offsets.h
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Editing: bitops.h
Close
/* * Port on Texas Instruments TMS320C6x architecture * * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #ifndef _ASM_C6X_BITOPS_H #define _ASM_C6X_BITOPS_H #ifdef __KERNEL__ #include <linux/bitops.h> #include <asm/byteorder.h> #include <asm/barrier.h> /* * We are lucky, DSP is perfect for bitops: do it in 3 cycles */ /** * __ffs - find first bit in word. * @word: The word to search * * Undefined if no bit exists, so code should check against 0 first. * Note __ffs(0) = undef, __ffs(1) = 0, __ffs(0x80000000) = 31. * */ static inline unsigned long __ffs(unsigned long x) { asm (" bitr .M1 %0,%0\n" " nop\n" " lmbd .L1 1,%0,%0\n" : "+a"(x)); return x; } /* * ffz - find first zero in word. * @word: The word to search * * Undefined if no zero exists, so code should check against ~0UL first. */ #define ffz(x) __ffs(~(x)) /** * fls - find last (most-significant) bit set * @x: the word to search * * This is defined the same way as ffs. * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32. */ static inline int fls(int x) { if (!x) return 0; asm (" lmbd .L1 1,%0,%0\n" : "+a"(x)); return 32 - x; } /** * 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). * Note ffs(0) = 0, ffs(1) = 1, ffs(0x80000000) = 32. */ static inline int ffs(int x) { if (!x) return 0; return __ffs(x) + 1; } #include <asm-generic/bitops/__fls.h> #include <asm-generic/bitops/fls64.h> #include <asm-generic/bitops/find.h> #include <asm-generic/bitops/sched.h> #include <asm-generic/bitops/hweight.h> #include <asm-generic/bitops/lock.h> #include <asm-generic/bitops/atomic.h> #include <asm-generic/bitops/non-atomic.h> #include <asm-generic/bitops/le.h> #include <asm-generic/bitops/ext2-atomic.h> #endif /* __KERNEL__ */ #endif /* _ASM_C6X_BITOPS_H */