diff options
author | Chris Metcalf <cmetcalf@ezchip.com> | 2015-10-06 14:20:45 -0400 |
---|---|---|
committer | Chris Metcalf <cmetcalf@ezchip.com> | 2015-10-06 14:53:16 -0400 |
commit | c753bf34c94e5ac901e625e52f47320eeec4de2d (patch) | |
tree | d6ea98199b3f8af9490474c5bd8599aee56fd083 | |
parent | 19c22f3a29fa8669c477f20a65f6c7c27108972a (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.h | 2 | ||||
-rw-r--r-- | arch/tile/include/asm/word-at-a-time.h | 8 |
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 @@ | |||
6 | struct word_at_a_time { /* unused */ }; | 6 | struct 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. */ |
10 | static inline unsigned long has_zero(unsigned long val, unsigned long *data, | 10 | static 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 */ |