Mercurial > projects > ldc
annotate runtime/internal/ldc/bitmanip.d @ 665:d8a1481eaa0c
Renames.
author | Christian Kamm <kamm incasoftware de> |
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date | Mon, 06 Oct 2008 22:56:54 +0200 |
parents | runtime/internal/llvmdc/bitmanip.d@6aaa3d3c1183 |
children | 1fcba307fd28 |
rev | line source |
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1 /* |
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2 * D phobos intrinsics for LDC |
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3 * |
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4 * From GDC ... public domain! |
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5 */ |
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6 module ldc.bitmanip; |
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7 |
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8 // Check for the right compiler |
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9 version(LDC) |
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10 { |
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11 // OK |
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12 } |
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13 else |
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14 { |
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15 static assert(false, "This module is only valid for LDC"); |
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16 } |
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17 |
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18 int bsf(uint v) |
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19 { |
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20 uint m = 1; |
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21 uint i; |
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22 for (i = 0; i < 32; i++,m<<=1) { |
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23 if (v&m) |
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24 return i; |
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25 } |
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26 return i; // supposed to be undefined |
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27 } |
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28 |
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29 int bsr(uint v) |
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30 { |
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31 uint m = 0x80000000; |
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32 uint i; |
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33 for (i = 32; i ; i--,m>>>=1) { |
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34 if (v&m) |
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35 return i-1; |
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36 } |
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37 return i; // supposed to be undefined |
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38 } |
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39 |
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40 int bt(uint *p, uint bitnum) |
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41 { |
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42 return (p[bitnum / (uint.sizeof*8)] & (1<<(bitnum & ((uint.sizeof*8)-1)))) ? -1 : 0 ; |
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43 } |
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44 |
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45 int btc(uint *p, uint bitnum) |
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46 { |
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47 uint * q = p + (bitnum / (uint.sizeof*8)); |
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48 uint mask = 1 << (bitnum & ((uint.sizeof*8) - 1)); |
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49 int result = *q & mask; |
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50 *q ^= mask; |
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51 return result ? -1 : 0; |
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52 } |
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53 |
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54 int btr(uint *p, uint bitnum) |
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55 { |
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56 uint * q = p + (bitnum / (uint.sizeof*8)); |
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57 uint mask = 1 << (bitnum & ((uint.sizeof*8) - 1)); |
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58 int result = *q & mask; |
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59 *q &= ~mask; |
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60 return result ? -1 : 0; |
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61 } |
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62 |
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63 int bts(uint *p, uint bitnum) |
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64 { |
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65 uint * q = p + (bitnum / (uint.sizeof*8)); |
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66 uint mask = 1 << (bitnum & ((uint.sizeof*8) - 1)); |
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67 int result = *q & mask; |
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68 *q |= mask; |
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69 return result ? -1 : 0; |
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70 } |
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71 |
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72 pragma(intrinsic, "llvm.bswap.i32") |
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73 uint bswap(uint val); |
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74 |
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75 ubyte inp(uint p) { throw new Exception("inp intrinsic not yet implemented"); } |
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76 ushort inpw(uint p) { throw new Exception("inpw intrinsic not yet implemented"); } |
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77 uint inpl(uint p) { throw new Exception("inpl intrinsic not yet implemented"); } |
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78 |
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79 ubyte outp(uint p, ubyte v) { throw new Exception("outp intrinsic not yet implemented"); } |
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80 ushort outpw(uint p, ushort v) { throw new Exception("outpw intrinsic not yet implemented"); } |
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81 uint outpl(uint p, uint v) { throw new Exception("outpl intrinsic not yet implemented"); } |