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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 /arch
parent19c22f3a29fa8669c477f20a65f6c7c27108972a (diff)
downloadlinux-linaro-stable-c753bf34c94e5ac901e625e52f47320eeec4de2d.tar.gz
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>
Diffstat (limited to 'arch')
-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)
#endif
}
+#define zero_bytemask(mask) ((2ul << (find_zero(mask) * 8)) - 1)
+
#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 @@
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 */