| … | |
… | |
| 20 | w.b[2] = 0x33; |
20 | w.b[2] = 0x33; |
| 21 | w.b[3] = 0x44; |
21 | w.b[3] = 0x44; |
| 22 | |
22 | |
| 23 | e = w.u; |
23 | e = w.u; |
| 24 | } |
24 | } |
|
|
25 | |
|
|
26 | #if !HAVE_GCC_BUILTINS |
|
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27 | int ctz (unsigned int x) |
|
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28 | { |
|
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29 | int r = 0; |
|
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30 | |
|
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31 | x &= -x; // this isolates the lowest bit |
|
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32 | |
|
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33 | if (x & 0xaaaaaaaa) r += 1; |
|
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34 | if (x & 0xcccccccc) r += 2; |
|
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35 | if (x & 0xf0f0f0f0) r += 4; |
|
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36 | if (x & 0xff00ff00) r += 8; |
|
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37 | if (x & 0xffff0000) r += 16; |
|
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38 | |
|
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39 | return r; |
|
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40 | } |
|
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41 | |
|
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42 | int popcount (unsigned int x) |
|
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43 | { |
|
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44 | x -= (x >> 1) & 0x55555555; |
|
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45 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
|
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46 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
|
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47 | x *= 0x01010101; |
|
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48 | |
|
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49 | return x >> 24; |
|
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50 | } |
|
|
51 | #endif |
| 25 | |
52 | |
| 26 | void * |
53 | void * |
| 27 | zero_initialized::operator new (size_t s) |
54 | zero_initialized::operator new (size_t s) |
| 28 | { |
55 | { |
| 29 | void *p = malloc (s); |
56 | void *p = malloc (s); |
