Rev 33 | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
| Rev 33 | Rev 108 | ||
|---|---|---|---|
| Line 6... | Line 6... | ||
| 6 | /* *INDENT-OFF* */ |
6 | /* *INDENT-OFF* */ |
| 7 | #if defined(UNIX) |
7 | #if defined(UNIX) |
| 8 | static __inline__ int MSB(uint64_t word) { |
8 | static __inline__ int MSB(uint64_t word) { |
| 9 | uint64_t dummy, dummy2; |
9 | uint64_t dummy, dummy2; |
| 10 | 10 | ||
| 11 | asm(" bsrq %1, %0 " "\n\t" |
11 | asm(" bsrq %1, %0 " "\n\t" |
| 12 | : "=&r"(dummy), "=&r" (dummy2) |
12 | : "=&r"(dummy), "=&r" (dummy2) |
| 13 | : "1"((uint64_t) (word)) |
13 | : "1"((uint64_t) (word)) |
| 14 | : "cc"); |
14 | : "cc"); |
| 15 | return (dummy); |
15 | return (dummy); |
| 16 | } |
16 | } |
| 17 | static __inline__ int LSB(uint64_t word) { |
17 | static __inline__ int LSB(uint64_t word) { |
| 18 | uint64_t dummy, dummy2; |
18 | uint64_t dummy, dummy2; |
| 19 | 19 | ||
| 20 | asm(" bsfq %1, %0 " "\n\t" |
20 | asm(" bsfq %1, %0 " "\n\t" |
| 21 | : "=&r"(dummy), "=&r" (dummy2) |
21 | : "=&r"(dummy), "=&r" (dummy2) |
| 22 | : "1"((uint64_t) (word)) |
22 | : "1"((uint64_t) (word)) |
| 23 | : "cc"); |
23 | : "cc"); |
| 24 | return (dummy); |
24 | return (dummy); |
| 25 | } |
25 | } |
| 26 | #if defined(POPCNT) |
26 | #if defined(POPCNT) |
| 27 | static __inline__ int PopCnt(uint64_t word) { |
27 | static __inline__ int PopCnt(uint64_t word) { |
| 28 | uint64_t dummy, dummy2; |
28 | uint64_t dummy, dummy2; |
| 29 | 29 | ||
| 30 | asm(" popcnt %1, %0 " "\n\t" |
30 | asm(" popcnt %1, %0 " "\n\t" |
| 31 | : "=&r"(dummy), "=&r" (dummy2) |
31 | : "=&r"(dummy), "=&r" (dummy2) |
| 32 | : "1"((uint64_t) (word)) |
32 | : "1"((uint64_t) (word)) |
| 33 | : "cc"); |
33 | : "cc"); |
| 34 | return (dummy); |
34 | return (dummy); |
| 35 | } |
35 | } |
| 36 | #else |
36 | #else |
| 37 | static __inline__ int PopCnt(uint64_t word) { |
37 | static __inline__ int PopCnt(uint64_t word) { |
| 38 | uint64_t dummy, dummy2, dummy3; |
38 | uint64_t dummy, dummy2, dummy3; |
| 39 | 39 | ||
| 40 | asm(" xorq %0, %0 " "\n\t" |
40 | asm(" xorq %0, %0 " "\n\t" |
| 41 | " testq %1, %1 " "\n\t" |
41 | " testq %1, %1 " "\n\t" |
| 42 | " jz 2f " "\n\t" |
42 | " jz 2f " "\n\t" |
| 43 | "1: leaq -1(%1),%2 " "\n\t" |
43 | "1: leaq -1(%1),%2 " "\n\t" |
| 44 | " incq %0 " "\n\t" |
44 | " incq %0 " "\n\t" |
| 45 | " andq %2, %1 " "\n\t" |
45 | " andq %2, %1 " "\n\t" |
| 46 | " jnz 1b " "\n\t" |
46 | " jnz 1b " "\n\t" |
| 47 | "2: " "\n\t" |
47 | "2: " "\n\t" |
| 48 | : "=&r"(dummy), "=&r"(dummy2), "=&r"(dummy3) |
48 | : "=&r"(dummy), "=&r"(dummy2), "=&r"(dummy3) |
| 49 | : "1"((uint64_t) (word)) |
49 | : "1"((uint64_t) (word)) |
| 50 | : "cc"); |
50 | : "cc"); |
| 51 | return (dummy); |
51 | return (dummy); |
| 52 | } |
52 | } |
| Line 60... | Line 60... | ||
| 60 | #else |
60 | #else |
| 61 | 61 | ||
| 62 | __forceinline int PopCnt(uint64_t a) { |
62 | __forceinline int PopCnt(uint64_t a) { |
| 63 | int c = 1; |
63 | int c = 1; |
| 64 | 64 | ||
| - | 65 | if (!a) |
|
| - | 66 | return 0; |
|
| 65 | while (a &= a - 1) |
67 | while (a &= a - 1) |
| 66 | c++; |
68 | c++; |
| 67 | return c; |
69 | return c; |
| 68 | } |
70 | } |
| 69 | #endif |
71 | #endif |