diff options
Diffstat (limited to 'lib/hweight.c')
| -rw-r--r-- | lib/hweight.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/lib/hweight.c b/lib/hweight.c index 63ee4eb1228d..3c79d50814cf 100644 --- a/lib/hweight.c +++ b/lib/hweight.c | |||
| @@ -9,7 +9,7 @@ | |||
| 9 | * The Hamming Weight of a number is the total number of bits set in it. | 9 | * The Hamming Weight of a number is the total number of bits set in it. |
| 10 | */ | 10 | */ |
| 11 | 11 | ||
| 12 | unsigned int hweight32(unsigned int w) | 12 | unsigned int __sw_hweight32(unsigned int w) |
| 13 | { | 13 | { |
| 14 | #ifdef ARCH_HAS_FAST_MULTIPLIER | 14 | #ifdef ARCH_HAS_FAST_MULTIPLIER |
| 15 | w -= (w >> 1) & 0x55555555; | 15 | w -= (w >> 1) & 0x55555555; |
| @@ -24,29 +24,30 @@ unsigned int hweight32(unsigned int w) | |||
| 24 | return (res + (res >> 16)) & 0x000000FF; | 24 | return (res + (res >> 16)) & 0x000000FF; |
| 25 | #endif | 25 | #endif |
| 26 | } | 26 | } |
| 27 | EXPORT_SYMBOL(hweight32); | 27 | EXPORT_SYMBOL(__sw_hweight32); |
| 28 | 28 | ||
| 29 | unsigned int hweight16(unsigned int w) | 29 | unsigned int __sw_hweight16(unsigned int w) |
| 30 | { | 30 | { |
| 31 | unsigned int res = w - ((w >> 1) & 0x5555); | 31 | unsigned int res = w - ((w >> 1) & 0x5555); |
| 32 | res = (res & 0x3333) + ((res >> 2) & 0x3333); | 32 | res = (res & 0x3333) + ((res >> 2) & 0x3333); |
| 33 | res = (res + (res >> 4)) & 0x0F0F; | 33 | res = (res + (res >> 4)) & 0x0F0F; |
| 34 | return (res + (res >> 8)) & 0x00FF; | 34 | return (res + (res >> 8)) & 0x00FF; |
| 35 | } | 35 | } |
| 36 | EXPORT_SYMBOL(hweight16); | 36 | EXPORT_SYMBOL(__sw_hweight16); |
| 37 | 37 | ||
| 38 | unsigned int hweight8(unsigned int w) | 38 | unsigned int __sw_hweight8(unsigned int w) |
| 39 | { | 39 | { |
| 40 | unsigned int res = w - ((w >> 1) & 0x55); | 40 | unsigned int res = w - ((w >> 1) & 0x55); |
| 41 | res = (res & 0x33) + ((res >> 2) & 0x33); | 41 | res = (res & 0x33) + ((res >> 2) & 0x33); |
| 42 | return (res + (res >> 4)) & 0x0F; | 42 | return (res + (res >> 4)) & 0x0F; |
| 43 | } | 43 | } |
| 44 | EXPORT_SYMBOL(hweight8); | 44 | EXPORT_SYMBOL(__sw_hweight8); |
| 45 | 45 | ||
| 46 | unsigned long hweight64(__u64 w) | 46 | unsigned long __sw_hweight64(__u64 w) |
| 47 | { | 47 | { |
| 48 | #if BITS_PER_LONG == 32 | 48 | #if BITS_PER_LONG == 32 |
| 49 | return hweight32((unsigned int)(w >> 32)) + hweight32((unsigned int)w); | 49 | return __sw_hweight32((unsigned int)(w >> 32)) + |
| 50 | __sw_hweight32((unsigned int)w); | ||
| 50 | #elif BITS_PER_LONG == 64 | 51 | #elif BITS_PER_LONG == 64 |
| 51 | #ifdef ARCH_HAS_FAST_MULTIPLIER | 52 | #ifdef ARCH_HAS_FAST_MULTIPLIER |
| 52 | w -= (w >> 1) & 0x5555555555555555ul; | 53 | w -= (w >> 1) & 0x5555555555555555ul; |
| @@ -63,4 +64,4 @@ unsigned long hweight64(__u64 w) | |||
| 63 | #endif | 64 | #endif |
| 64 | #endif | 65 | #endif |
| 65 | } | 66 | } |
| 66 | EXPORT_SYMBOL(hweight64); | 67 | EXPORT_SYMBOL(__sw_hweight64); |
