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| author | Paul Mundt <lethal@linux-sh.org> | 2007-11-11 17:28:18 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2008-01-28 13:18:45 +0900 |
| commit | 63e2c803326babe74033b3cbe6e8c550037c554f (patch) | |
| tree | 9a08d857d6d7f8fd8a73f3c5f600a2db90d2875c /include/asm-sh | |
| parent | 079060c6ff6edd32955c3e511024578db89a717b (diff) | |
| download | blackbird-op-linux-63e2c803326babe74033b3cbe6e8c550037c554f.tar.gz blackbird-op-linux-63e2c803326babe74033b3cbe6e8c550037c554f.zip | |
sh: Plug in SH-5 ffz()/__ffs() bitops.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'include/asm-sh')
| -rw-r--r-- | include/asm-sh/bitops.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/asm-sh/bitops.h b/include/asm-sh/bitops.h index df805f20b267..a7bd81a7f064 100644 --- a/include/asm-sh/bitops.h +++ b/include/asm-sh/bitops.h @@ -105,6 +105,7 @@ static inline int test_and_change_bit(int nr, volatile void * addr) #include <asm-generic/bitops/non-atomic.h> +#ifdef CONFIG_SUPERH32 static inline unsigned long ffz(unsigned long word) { unsigned long result; @@ -138,6 +139,31 @@ static inline unsigned long __ffs(unsigned long word) : "t"); return result; } +#else +static inline unsigned long ffz(unsigned long word) +{ + unsigned long result, __d2, __d3; + + __asm__("gettr tr0, %2\n\t" + "pta $+32, tr0\n\t" + "andi %1, 1, %3\n\t" + "beq %3, r63, tr0\n\t" + "pta $+4, tr0\n" + "0:\n\t" + "shlri.l %1, 1, %1\n\t" + "addi %0, 1, %0\n\t" + "andi %1, 1, %3\n\t" + "beqi %3, 1, tr0\n" + "1:\n\t" + "ptabs %2, tr0\n\t" + : "=r" (result), "=r" (word), "=r" (__d2), "=r" (__d3) + : "0" (0L), "1" (word)); + + return result; +} + +#include <asm-generic/bitops/__ffs.h> +#endif #include <asm-generic/bitops/find.h> #include <asm-generic/bitops/ffs.h> |
