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72
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1 module dmd.RealExp;
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2
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3 import dmd.Expression;
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4 import dmd.backend.elem;
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5 import dmd.InterState;
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6 import dmd.Type;
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7 import dmd.OutBuffer;
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8 import dmd.Loc;
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9 import dmd.TOK;
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10 import dmd.Scope;
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0
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11 import dmd.IRState;
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72
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12 import dmd.Type;
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13 import dmd.HdrGenState;
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14 import dmd.Port;
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15 import dmd.TY;
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72
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16
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0
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17 import dmd.backend.dt_t;
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18 import dmd.backend.Util;
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19 import dmd.backend.TYM;
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20 import dmd.backend.mTY;
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21
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72
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22 import dmd.Complex;
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23
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24 class RealExp : Expression
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25 {
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26 real value;
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27
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28 this(Loc loc, real value, Type type)
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29 {
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30 super(loc, TOK.TOKfloat64, RealExp.sizeof);
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31 //printf("RealExp.RealExp(%Lg)\n", value);
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32 this.value = value;
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33 this.type = type;
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34 }
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35
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36 override bool equals(Object o)
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37 {
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38 assert(false);
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39 }
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40
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41 override Expression semantic(Scope sc)
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42 {
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43 if (!type)
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44 type = Type.tfloat64;
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45 else
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46 type = type.semantic(loc, sc);
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47 return this;
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48 }
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49
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50 override Expression interpret(InterState istate)
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51 {
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52 assert(false);
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53 }
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54
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55 override string toChars()
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56 {
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57 assert(false);
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58 }
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59
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60 override ulong toInteger()
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61 {
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62 assert(false);
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63 }
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64
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65 override ulong toUInteger()
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66 {
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67 assert(false);
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68 }
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69
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70 override real toReal()
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71 {
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72 return type.isreal() ? value : 0;
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73 }
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74
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75 override real toImaginary()
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76 {
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77 return type.isreal() ? 0 : value;
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78 }
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79
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80 override Complex!(real) toComplex()
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81 {
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82 return Complex!(real)(toReal(), toImaginary());
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83 }
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84
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85 override Expression castTo(Scope sc, Type t)
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86 {
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87 Expression e = this;
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88 if (type != t)
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89 {
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90 if ((type.isreal() && t.isreal()) ||
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91 (type.isimaginary() && t.isimaginary())
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92 )
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93 {
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94 e = copy();
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95 e.type = t;
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96 }
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97 else
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98 e = Expression.castTo(sc, t);
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99 }
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100 return e;
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101 }
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102
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103 override int isConst()
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104 {
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105 return 1;
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106 }
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107
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108 override bool isBool(bool result)
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109 {
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110 assert(false);
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111 }
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112
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113 override void toCBuffer(OutBuffer buf, HdrGenState* hgs)
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114 {
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115 assert(false);
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116 }
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117
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118 override void toMangleBuffer(OutBuffer buf)
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119 {
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120 assert(false);
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121 }
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122
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123 override elem* toElem(IRState* irs)
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124 {
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125 eve c;
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126 tym_t ty;
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127
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128 //printf("RealExp.toElem(%p) %s\n", this, toChars());
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129 ///memset(&c, 0, sizeof(c));
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130 ty = type.toBasetype().totym();
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131 switch (tybasic(ty))
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132 {
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133 case TYfloat:
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134 case TYifloat:
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135 c.Vfloat = value;
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136 if (Port.isSignallingNan(value)) {
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137 std.stdio.writeln("signalling float");
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138 (cast(uint*)&c.Vfloat)[0] &= 0xFFBFFFFFL;
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139 }
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140 break;
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141
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142 case TYdouble:
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143 case TYidouble:
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144 c.Vdouble = value; // unfortunately, this converts SNAN to QNAN
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145 if (Port.isSignallingNan(value)) {
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146 std.stdio.writeln("signalling double");
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147 // Put SNAN back
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148 (cast(uint*)&c.Vdouble)[1] &= 0xFFF7FFFFL;
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149 }
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150 break;
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151
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152 case TYldouble:
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153 case TYildouble:
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154 c.Vldouble = value;
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155 break;
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156
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157 default:
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158 print();
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159 ///type.print();
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160 ///type.toBasetype().print();
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161 writef("ty = %d, tym = %x\n", type.ty, ty);
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162 assert(0);
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163 }
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164 return el_const(ty, &c);
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165 }
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166
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167 static private char[6] zeropad;
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168
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72
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169 override dt_t** toDt(dt_t** pdt)
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170 {
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171 float fvalue;
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172 double dvalue;
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173 real evalue;
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174
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175 //printf("RealExp.toDt(%Lg)\n", value);
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176 switch (type.toBasetype().ty)
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177 {
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178 case Tfloat32:
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179 case Timaginary32:
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180 fvalue = value;
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181 pdt = dtnbytes(pdt,4,cast(char*)&fvalue);
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182 break;
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183
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184 case Tfloat64:
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185 case Timaginary64:
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186 dvalue = value;
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187 pdt = dtnbytes(pdt,8,cast(char*)&dvalue);
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188 break;
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189
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190 case Tfloat80:
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191 case Timaginary80:
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192 evalue = value;
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193 pdt = dtnbytes(pdt,REALSIZE - REALPAD,cast(char*)&evalue);
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194 pdt = dtnbytes(pdt,REALPAD,zeropad.ptr);
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195 assert(REALPAD <= zeropad.sizeof);
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196 break;
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197
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198 default:
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199 writef("%s\n", toChars());
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200 ///type.print();
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201 assert(0);
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202 break;
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203 }
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204 return pdt;
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205 }
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206 }
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207
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