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Commit c753bf34 authored by Chris Metcalf's avatar Chris Metcalf
Browse files

word-at-a-time.h: support zero_bytemask() on alpha and tile 



Both alpha and tile needed implementations of zero_bytemask.

The alpha version is untested.

Signed-off-by: default avatarChris Metcalf <cmetcalf@ezchip.com>
parent 19c22f3a

arch/alpha/include/asm/word-at-a-time.h

+2 −0
Original line number Diff line number Diff line
@@ -52,4 +52,6 @@ static inline unsigned long find_zero(unsigned long bits) 
#endif

}



#define zero_bytemask(mask) ((2ul << (find_zero(mask) * 8)) - 1)



#endif /* _ASM_WORD_AT_A_TIME_H */

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

+7 −1
Original line number Diff line number Diff line
@@ -6,7 +6,7 @@ 
struct word_at_a_time { /* unused */ };

#define WORD_AT_A_TIME_CONSTANTS {}



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

/* 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)

{
@@ -33,4 +33,10 @@ static inline long find_zero(unsigned long mask) 
#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 */