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authorChris Metcalf <cmetcalf@ezchip.com>2015-10-06 14:20:45 -0400
committerChris Metcalf <cmetcalf@ezchip.com>2015-10-06 14:53:16 -0400
commitc753bf34c94e5ac901e625e52f47320eeec4de2d (patch)
treed6ea98199b3f8af9490474c5bd8599aee56fd083
parent19c22f3a29fa8669c477f20a65f6c7c27108972a (diff)
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: Chris Metcalf <cmetcalf@ezchip.com>
-rw-r--r--arch/alpha/include/asm/word-at-a-time.h2
-rw-r--r--arch/tile/include/asm/word-at-a-time.h8
2 files changed, 9 insertions, 1 deletions
diff --git a/arch/alpha/include/asm/word-at-a-time.h b/arch/alpha/include/asm/word-at-a-time.h
index 6b340d0f1521..902e6ab00a06 100644
--- a/arch/alpha/include/asm/word-at-a-time.h
+++ b/arch/alpha/include/asm/word-at-a-time.h
@@ -52,4 +52,6 @@ static inline unsigned long find_zero(unsigned long bits)
52#endif 52#endif
53} 53}
54 54
55#define zero_bytemask(mask) ((2ul << (find_zero(mask) * 8)) - 1)
56
55#endif /* _ASM_WORD_AT_A_TIME_H */ 57#endif /* _ASM_WORD_AT_A_TIME_H */
diff --git a/arch/tile/include/asm/word-at-a-time.h b/arch/tile/include/asm/word-at-a-time.h
index 9e5ce0d7b292..b66a693c2c34 100644
--- a/arch/tile/include/asm/word-at-a-time.h
+++ b/arch/tile/include/asm/word-at-a-time.h
@@ -6,7 +6,7 @@
6struct word_at_a_time { /* unused */ }; 6struct word_at_a_time { /* unused */ };
7#define WORD_AT_A_TIME_CONSTANTS {} 7#define WORD_AT_A_TIME_CONSTANTS {}
8 8
9/* Generate 0x01 byte values for non-zero bytes using a SIMD instruction. */ 9/* Generate 0x01 byte values for zero bytes using a SIMD instruction. */
10static inline unsigned long has_zero(unsigned long val, unsigned long *data, 10static inline unsigned long has_zero(unsigned long val, unsigned long *data,
11 const struct word_at_a_time *c) 11 const struct word_at_a_time *c)
12{ 12{
@@ -33,4 +33,10 @@ static inline long find_zero(unsigned long mask)
33#endif 33#endif
34} 34}
35 35
36#ifdef __BIG_ENDIAN
37#define zero_bytemask(mask) (~1ul << (63 - __builtin_clzl(mask)))
38#else
39#define zero_bytemask(mask) ((2ul << __builtin_ctzl(mask)) - 1)
40#endif
41
36#endif /* _ASM_WORD_AT_A_TIME_H */ 42#endif /* _ASM_WORD_AT_A_TIME_H */