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1 module dmd.expression.Add;
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2
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3 import dmd.Expression;
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4 import dmd.Type;
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5 import dmd.Loc;
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6 import dmd.RealExp;
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7 import dmd.ComplexExp;
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8 import dmd.IntegerExp;
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9 import dmd.TOK;
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10 import dmd.SymOffExp;
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11 import dmd.Complex;
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12
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13 Expression Add(Type type, Expression e1, Expression e2)
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14 {
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15 Expression e;
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16 Loc loc = e1.loc;
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17
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18 version (LOG) {
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19 printf("Add(e1 = %s, e2 = %s)\n", e1.toChars(), e2.toChars());
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20 }
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21 if (type.isreal())
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22 {
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23 e = new RealExp(loc, e1.toReal() + e2.toReal(), type);
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24 }
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25 else if (type.isimaginary())
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26 {
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27 e = new RealExp(loc, e1.toImaginary() + e2.toImaginary(), type);
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28 }
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29 else if (type.iscomplex())
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30 {
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31 // This rigamarole is necessary so that -0.0 doesn't get
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32 // converted to +0.0 by doing an extraneous add with +0.0
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33 Complex!(real) c1;
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34 real r1;
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35 real i1;
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36
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37 Complex!(real) c2;
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38 real r2;
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39 real i2;
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40
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41 Complex!(real) v;
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42 int x;
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43
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44 if (e1.type.isreal())
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45 {
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46 r1 = e1.toReal();
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47 x = 0;
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48 }
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49 else if (e1.type.isimaginary())
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50 {
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51 i1 = e1.toImaginary();
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52 x = 3;
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53 }
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54 else
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55 {
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56 c1 = e1.toComplex();
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57 x = 6;
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58 }
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59
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60 if (e2.type.isreal())
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61 {
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62 r2 = e2.toReal();
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63 }
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64 else if (e2.type.isimaginary())
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65 {
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66 i2 = e2.toImaginary();
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67 x += 1;
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68 }
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69 else
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70 {
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71 c2 = e2.toComplex();
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72 x += 2;
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73 }
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74
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75 switch (x)
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76 {
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77 case 0+0: v = Complex!(real)(r1 + r2, 0); break;
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78 case 0+1: v = Complex!(real)(r1, i2); break;
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79 case 0+2: v = Complex!(real)(r1 + c2.re, c2.im); break;
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80 case 3+0: v = Complex!(real)(r2, i1); break;
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81 case 3+1: v = Complex!(real)(0, i1 + i2); break;
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82 case 3+2: v = Complex!(real)(c2.re, i1 + c2.im); break;
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83 case 6+0: v = Complex!(real)(c1.re + r2, c1.im); break;
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84 case 6+1: v = Complex!(real)(c1.re, c1.im + i2); break;
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85 case 6+2: v = Complex!(real)(c1.re + c2.re, c1.im + c2.im); break;
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86 }
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87 e = new ComplexExp(loc, v, type);
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88 }
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89 else if (e1.op == TOK.TOKsymoff)
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90 {
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91 SymOffExp soe = cast(SymOffExp)e1;
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92 e = new SymOffExp(loc, soe.var, soe.offset + cast(uint)e2.toInteger());
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93 e.type = type;
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94 }
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95 else if (e2.op == TOK.TOKsymoff)
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96 {
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97 SymOffExp soe = cast(SymOffExp)e2;
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98 e = new SymOffExp(loc, soe.var, soe.offset + cast(uint)e1.toInteger());
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99 e.type = type;
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100 }
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101 else
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102 e = new IntegerExp(loc, e1.toInteger() + e2.toInteger(), type);
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103
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104 return e;
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105 } |
