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

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

#define _ASM_WORD_AT_A_TIME_H

#include <asm/byteorder.h>


struct word_at_a_time { /* unused */ };

#define WORD_AT_A_TIME_CONSTANTS {}

/* Generate 0x01 byte values for zero bytes using a SIMD instruction. */


static inline unsigned long has_zero(unsigned long val, unsigned long *data,
				     const struct word_at_a_time *c)
{
#ifdef __tilegx__
	unsigned long mask = __insn_v1cmpeqi(val, 0);
#else /* tilepro */
	unsigned long mask = __insn_seqib(val, 0);
#endif
	*data = mask;
	return mask;
}

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/* These operations are both nops. */

#define prep_zero_mask(val, data, c) (data)

#define create_zero_mask(data) (data)

/* And this operation just depends on endianness. */


static inline long find_zero(unsigned long mask)
{
#ifdef __BIG_ENDIAN
	return __builtin_clzl(mask) >> 3;
#else
	return __builtin_ctzl(mask) >> 3;
#endif
}

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#ifdef __BIG_ENDIAN

#define zero_bytemask(mask) (~1ul << (63 - __builtin_clzl(mask)))
#else

#define zero_bytemask(mask) ((2ul << __builtin_ctzl(mask)) - 1)
#endif

#endif /* _ASM_WORD_AT_A_TIME_H */
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Directory: arch/tile/include/asm

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