Release 4.14 arch/sh/include/asm/word-at-a-time.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_SH_WORD_AT_A_TIME_H

#define __ASM_SH_WORD_AT_A_TIME_H

#ifdef CONFIG_CPU_BIG_ENDIAN
# include <asm-generic/word-at-a-time.h>
#else
/*
 * Little-endian version cribbed from x86.
 */

struct word_at_a_time {
	

const unsigned long one_bits, high_bits;
};


#define WORD_AT_A_TIME_CONSTANTS { REPEAT_BYTE(0x01), REPEAT_BYTE(0x80) }

/* Carl Chatfield / Jan Achrenius G+ version for 32-bit */


static inline long count_masked_bytes(long mask)
{
	/* (000000 0000ff 00ffff ffffff) -> ( 1 1 2 3 ) */
	long a = (0x0ff0001+mask) >> 23;
	/* Fix the 1 for 00 case */
	return a & mask;
}

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/* Return nonzero if it has a zero */


static inline unsigned long has_zero(unsigned long a, unsigned long *bits, const struct word_at_a_time *c)
{
	unsigned long mask = ((a - c->one_bits) & ~a) & c->high_bits;
	*bits = mask;
	return mask;
}

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static inline unsigned long prep_zero_mask(unsigned long a, unsigned long bits, const struct word_at_a_time *c)
{
	return bits;
}

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static inline unsigned long create_zero_mask(unsigned long bits)
{
	bits = (bits - 1) & ~bits;
	return bits >> 7;
}

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/* The mask we created is directly usable as a bytemask */

#define zero_bytemask(mask) (mask)



static inline unsigned long find_zero(unsigned long mask)
{
	return count_masked_bytes(mask);
}
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#endif

#endif
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Directory: arch/sh/include/asm

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