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comparison dmd/expression/Add.d @ 0:10317f0c89a5

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Initial commit
author korDen
date Sat, 24 Oct 2009 08:42:06 +0400
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children 5c9b78899f5d
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-1:000000000000 0:10317f0c89a5
1 module dmd.expression.Add;
2
3 import dmd.Expression;
4 import dmd.Type;
5 import dmd.Loc;
6 import dmd.RealExp;
7 import dmd.ComplexExp;
8 import dmd.IntegerExp;
9 import dmd.TOK;
10 import dmd.SymOffExp;
11 import dmd.Complex;
12
13 Expression Add(Type type, Expression e1, Expression e2)
14 {
15 Expression e;
16 Loc loc = e1.loc;
17
18 version (LOG) {
19 printf("Add(e1 = %s, e2 = %s)\n", e1.toChars(), e2.toChars());
20 }
21 if (type.isreal())
22 {
23 e = new RealExp(loc, e1.toReal() + e2.toReal(), type);
24 }
25 else if (type.isimaginary())
26 {
27 e = new RealExp(loc, e1.toImaginary() + e2.toImaginary(), type);
28 }
29 else if (type.iscomplex())
30 {
31 // This rigamarole is necessary so that -0.0 doesn't get
32 // converted to +0.0 by doing an extraneous add with +0.0
33 Complex!(real) c1;
34 real r1;
35 real i1;
36
37 Complex!(real) c2;
38 real r2;
39 real i2;
40
41 Complex!(real) v;
42 int x;
43
44 if (e1.type.isreal())
45 {
46 r1 = e1.toReal();
47 x = 0;
48 }
49 else if (e1.type.isimaginary())
50 {
51 i1 = e1.toImaginary();
52 x = 3;
53 }
54 else
55 {
56 c1 = e1.toComplex();
57 x = 6;
58 }
59
60 if (e2.type.isreal())
61 {
62 r2 = e2.toReal();
63 }
64 else if (e2.type.isimaginary())
65 {
66 i2 = e2.toImaginary();
67 x += 1;
68 }
69 else
70 {
71 c2 = e2.toComplex();
72 x += 2;
73 }
74
75 switch (x)
76 {
77 case 0+0: v = Complex!(real)(r1 + r2, 0); break;
78 case 0+1: v = Complex!(real)(r1, i2); break;
79 case 0+2: v = Complex!(real)(r1 + c2.re, c2.im); break;
80 case 3+0: v = Complex!(real)(r2, i1); break;
81 case 3+1: v = Complex!(real)(0, i1 + i2); break;
82 case 3+2: v = Complex!(real)(c2.re, i1 + c2.im); break;
83 case 6+0: v = Complex!(real)(c1.re + r2, c1.im); break;
84 case 6+1: v = Complex!(real)(c1.re, c1.im + i2); break;
85 case 6+2: v = Complex!(real)(c1.re + c2.re, c1.im + c2.im); break;
86 }
87 e = new ComplexExp(loc, v, type);
88 }
89 else if (e1.op == TOK.TOKsymoff)
90 {
91 SymOffExp soe = cast(SymOffExp)e1;
92 e = new SymOffExp(loc, soe.var, soe.offset + cast(uint)e2.toInteger());
93 e.type = type;
94 }
95 else if (e2.op == TOK.TOKsymoff)
96 {
97 SymOffExp soe = cast(SymOffExp)e2;
98 e = new SymOffExp(loc, soe.var, soe.offset + cast(uint)e1.toInteger());
99 e.type = type;
100 }
101 else
102 e = new IntegerExp(loc, e1.toInteger() + e2.toInteger(), type);
103
104 return e;
105 }