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Directory :  /lib/modules/5.15.0-113-generic/build/include/asm-generic/bitops/

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Current File : /lib/modules/5.15.0-113-generic/build/include/asm-generic/bitops/le.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_GENERIC_BITOPS_LE_H_
#define _ASM_GENERIC_BITOPS_LE_H_

#include <asm-generic/bitops/find.h>
#include <asm/types.h>
#include <asm/byteorder.h>
#include <linux/swab.h>

#if defined(__LITTLE_ENDIAN)

#define BITOP_LE_SWIZZLE	0

static inline unsigned long find_next_zero_bit_le(const void *addr,
		unsigned long size, unsigned long offset)
{
	return find_next_zero_bit(addr, size, offset);
}

static inline unsigned long find_next_bit_le(const void *addr,
		unsigned long size, unsigned long offset)
{
	return find_next_bit(addr, size, offset);
}

static inline unsigned long find_first_zero_bit_le(const void *addr,
		unsigned long size)
{
	return find_first_zero_bit(addr, size);
}

#elif defined(__BIG_ENDIAN)

#define BITOP_LE_SWIZZLE	((BITS_PER_LONG-1) & ~0x7)

#ifndef find_next_zero_bit_le
static inline
unsigned long find_next_zero_bit_le(const void *addr, unsigned
		long size, unsigned long offset)
{
	if (small_const_nbits(size)) {
		unsigned long val = *(const unsigned long *)addr;

		if (unlikely(offset >= size))
			return size;

		val = swab(val) | ~GENMASK(size - 1, offset);
		return val == ~0UL ? size : ffz(val);
	}

	return _find_next_bit(addr, NULL, size, offset, ~0UL, 1);
}
#endif

#ifndef find_next_bit_le
static inline
unsigned long find_next_bit_le(const void *addr, unsigned
		long size, unsigned long offset)
{
	if (small_const_nbits(size)) {
		unsigned long val = *(const unsigned long *)addr;

		if (unlikely(offset >= size))
			return size;

		val = swab(val) & GENMASK(size - 1, offset);
		return val ? __ffs(val) : size;
	}

	return _find_next_bit(addr, NULL, size, offset, 0UL, 1);
}
#endif

#ifndef find_first_zero_bit_le
#define find_first_zero_bit_le(addr, size) \
	find_next_zero_bit_le((addr), (size), 0)
#endif

#else
#error "Please fix <asm/byteorder.h>"
#endif

static inline int test_bit_le(int nr, const void *addr)
{
	return test_bit(nr ^ BITOP_LE_SWIZZLE, addr);
}

static inline void set_bit_le(int nr, void *addr)
{
	set_bit(nr ^ BITOP_LE_SWIZZLE, addr);
}

static inline void clear_bit_le(int nr, void *addr)
{
	clear_bit(nr ^ BITOP_LE_SWIZZLE, addr);
}

static inline void __set_bit_le(int nr, void *addr)
{
	__set_bit(nr ^ BITOP_LE_SWIZZLE, addr);
}

static inline void __clear_bit_le(int nr, void *addr)
{
	__clear_bit(nr ^ BITOP_LE_SWIZZLE, addr);
}

static inline int test_and_set_bit_le(int nr, void *addr)
{
	return test_and_set_bit(nr ^ BITOP_LE_SWIZZLE, addr);
}

static inline int test_and_clear_bit_le(int nr, void *addr)
{
	return test_and_clear_bit(nr ^ BITOP_LE_SWIZZLE, addr);
}

static inline int __test_and_set_bit_le(int nr, void *addr)
{
	return __test_and_set_bit(nr ^ BITOP_LE_SWIZZLE, addr);
}

static inline int __test_and_clear_bit_le(int nr, void *addr)
{
	return __test_and_clear_bit(nr ^ BITOP_LE_SWIZZLE, addr);
}

#endif /* _ASM_GENERIC_BITOPS_LE_H_ */

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