1
2#ifndef __ASM_SH_WORD_AT_A_TIME_H
3#define __ASM_SH_WORD_AT_A_TIME_H
4
5#ifdef CONFIG_CPU_BIG_ENDIAN
6# include <asm-generic/word-at-a-time.h>
7#else
8
9
10
11struct word_at_a_time {
12 const unsigned long one_bits, high_bits;
13};
14
15#define WORD_AT_A_TIME_CONSTANTS { REPEAT_BYTE(0x01), REPEAT_BYTE(0x80) }
16
17
18static inline long count_masked_bytes(long mask)
19{
20
21 long a = (0x0ff0001+mask) >> 23;
22
23 return a & mask;
24}
25
26
27static inline unsigned long has_zero(unsigned long a, unsigned long *bits, const struct word_at_a_time *c)
28{
29 unsigned long mask = ((a - c->one_bits) & ~a) & c->high_bits;
30 *bits = mask;
31 return mask;
32}
33
34static inline unsigned long prep_zero_mask(unsigned long a, unsigned long bits, const struct word_at_a_time *c)
35{
36 return bits;
37}
38
39static inline unsigned long create_zero_mask(unsigned long bits)
40{
41 bits = (bits - 1) & ~bits;
42 return bits >> 7;
43}
44
45
46#define zero_bytemask(mask) (mask)
47
48static inline unsigned long find_zero(unsigned long mask)
49{
50 return count_masked_bytes(mask);
51}
52#endif
53
54#endif
55