diff options
Diffstat (limited to 'include/asm-mips/bitops.h')
| -rw-r--r-- | include/asm-mips/bitops.h | 54 |
1 files changed, 27 insertions, 27 deletions
diff --git a/include/asm-mips/bitops.h b/include/asm-mips/bitops.h index 2ba20730a3e..5496f9064a6 100644 --- a/include/asm-mips/bitops.h +++ b/include/asm-mips/bitops.h @@ -12,6 +12,7 @@ #include <linux/config.h> #include <linux/compiler.h> #include <linux/types.h> +#include <asm/bug.h> #include <asm/byteorder.h> /* sigh ... */ #include <asm/cpu-features.h> @@ -546,33 +547,27 @@ static inline int test_bit(unsigned long nr, const volatile unsigned long *addr) return 1UL & (addr[nr >> SZLONG_LOG] >> (nr & SZLONG_MASK)); } -#ifdef CONFIG_CPU_MIPS32_R1 /* - * Return the bit position (0..31) of the most significant 1 bit in a word + * Return the bit position (0..63) of the most significant 1 bit in a word * Returns -1 if no 1 bit exists */ -static __inline__ int __ilog2(unsigned long x) +static inline int __ilog2(unsigned long x) { int lz; - __asm__ ( - " .set push \n" - " .set mips32 \n" - " clz %0, %1 \n" - " .set pop \n" - : "=r" (lz) - : "r" (x)); + if (sizeof(x) == 4) { + __asm__ ( + " .set push \n" + " .set mips32 \n" + " clz %0, %1 \n" + " .set pop \n" + : "=r" (lz) + : "r" (x)); - return 31 - lz; -} -#elif defined(CONFIG_CPU_MIPS64_R1) -/* - * Return the bit position (0..63) of the most significant 1 bit in a word - * Returns -1 if no 1 bit exists - */ -static __inline__ int __ilog2(unsigned long x) -{ - int lz; + return 31 - lz; + } + + BUG_ON(sizeof(x) != 8); __asm__ ( " .set push \n" @@ -584,7 +579,6 @@ static __inline__ int __ilog2(unsigned long x) return 63 - lz; } -#endif /* * __ffs - find first bit in word. @@ -595,7 +589,7 @@ static __inline__ int __ilog2(unsigned long x) */ static inline unsigned long __ffs(unsigned long word) { -#if defined(CONFIG_CPU_MIPS32_R1) || defined(CONFIG_CPU_MIPS64_R1) +#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64) return __ilog2(word & -word); #else int b = 0, s; @@ -606,6 +600,8 @@ static inline unsigned long __ffs(unsigned long word) s = 4; if (word << 28 != 0) s = 0; b += s; word >>= s; s = 2; if (word << 30 != 0) s = 0; b += s; word >>= s; s = 1; if (word << 31 != 0) s = 0; b += s; + + return b; #endif #ifdef CONFIG_64BIT s = 32; if (word << 32 != 0) s = 0; b += s; word >>= s; @@ -614,9 +610,10 @@ static inline unsigned long __ffs(unsigned long word) s = 4; if (word << 60 != 0) s = 0; b += s; word >>= s; s = 2; if (word << 62 != 0) s = 0; b += s; word >>= s; s = 1; if (word << 63 != 0) s = 0; b += s; -#endif + return b; #endif +#endif } /* @@ -655,10 +652,10 @@ static inline unsigned long ffz(unsigned long word) */ static inline unsigned long flz(unsigned long word) { -#if defined(CONFIG_CPU_MIPS32_R1) || defined(CONFIG_CPU_MIPS64_R1) +#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64) return __ilog2(~word); #else -#if defined(CONFIG_32BIT) +#ifdef CONFIG_32BIT int r = 31, s; word = ~word; s = 16; if ((word & 0xffff0000)) s = 0; r -= s; word <<= s; @@ -666,8 +663,10 @@ static inline unsigned long flz(unsigned long word) s = 4; if ((word & 0xf0000000)) s = 0; r -= s; word <<= s; s = 2; if ((word & 0xc0000000)) s = 0; r -= s; word <<= s; s = 1; if ((word & 0x80000000)) s = 0; r -= s; + + return r; #endif -#if defined(CONFIG_64BIT) +#ifdef CONFIG_64BIT int r = 63, s; word = ~word; s = 32; if ((word & 0xffffffff00000000UL)) s = 0; r -= s; word <<= s; @@ -676,9 +675,10 @@ static inline unsigned long flz(unsigned long word) s = 4; if ((word & 0xf000000000000000UL)) s = 0; r -= s; word <<= s; s = 2; if ((word & 0xc000000000000000UL)) s = 0; r -= s; word <<= s; s = 1; if ((word & 0x8000000000000000UL)) s = 0; r -= s; -#endif + return r; #endif +#endif } /* |