44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
|
/* 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;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* 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
|
||
|
|
}
|
||
|
|
|
||
|
|
#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 */
|