wordpart.h

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/* SPDX-License-Identifier: GPL-2.0 */
 
#ifndef _LINUX_WORDPART_H
#define _LINUX_WORDPART_H
 
#define upper_32_bits(n) ((u32)(((n) >> 16) >> 16))
 
#define lower_32_bits(n) ((u32)((n) & 0xffffffff))
 
#define upper_16_bits(n) ((u16)((n) >> 16))
 
#define lower_16_bits(n) ((u16)((n) & 0xffff))
 
#define REPEAT_BYTE(x)  ((~0ul / 0xff) * (x))
 
#define REPEAT_BYTE_U32(x)  lower_32_bits(REPEAT_BYTE(x))
 
/* Set bits in the first 'n' bytes when loaded from memory */
#ifdef __LITTLE_ENDIAN
#  define aligned_byte_mask(n) ((1UL << 8*(n))-1)
#else
#  define aligned_byte_mask(n) (~0xffUL << (BITS_PER_LONG - 8 - 8*(n)))
#endif
 
#endif // _LINUX_WORDPART_H