44 lines
962 B
C
44 lines
962 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_WORD_AT_A_TIME_H
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#define _ASM_WORD_AT_A_TIME_H
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#include <linux/bitops.h>
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#include <linux/wordpart.h>
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#include <asm/bitsperlong.h>
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struct word_at_a_time {
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const unsigned long bits;
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};
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#define WORD_AT_A_TIME_CONSTANTS { REPEAT_BYTE(0x7f) }
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static inline unsigned long prep_zero_mask(unsigned long val, unsigned long data, const struct word_at_a_time *c)
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{
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return data;
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}
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static inline unsigned long create_zero_mask(unsigned long data)
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{
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return __fls(data);
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}
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static inline unsigned long find_zero(unsigned long data)
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{
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return (data ^ (BITS_PER_LONG - 1)) >> 3;
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}
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static inline unsigned long has_zero(unsigned long val, unsigned long *data, const struct word_at_a_time *c)
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{
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unsigned long mask = (val & c->bits) + c->bits;
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*data = ~(mask | val | c->bits);
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return *data;
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}
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static inline unsigned long zero_bytemask(unsigned long data)
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{
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return ~1UL << data;
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}
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#endif /* _ASM_WORD_AT_A_TIME_H */
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