1 | /*------------------------------------------------------------\ |
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2 | | | |
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3 | | Tool : systemcass | |
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4 | | | |
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5 | | File : sc_int.h | |
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6 | | | |
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7 | | Author : Buchmann Richard | |
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8 | | | |
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9 | | Date : 09_07_2004 | |
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10 | | | |
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11 | \------------------------------------------------------------*/ |
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12 | #ifndef __SC_INT_H__ |
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13 | #define __SC_INT_H__ |
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14 | |
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15 | #include <data_field.h> |
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16 | #include <sc_numrep.h> |
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17 | #include <sc_bit.h> |
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18 | #include <sc_logic.h> |
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19 | #include <sc_bv.h> |
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20 | #include <cstdlib> |
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21 | |
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22 | // ---------------------------------------------------------------------------- |
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23 | // CLASS : sc_int<W> |
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24 | // |
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25 | // Template class sc_int<W> is the interface that the user sees. It is |
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26 | // derived from sc_int_base and most of its methods are just wrappers |
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27 | // that call the corresponding method in the parent class. Note that |
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28 | // the width of sc_int datatype is specified as a template parameter. |
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29 | // ---------------------------------------------------------------------------- |
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30 | |
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31 | #include "sc_nbdefs.h" |
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32 | |
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33 | namespace sc_dt { |
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34 | |
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35 | typedef sc_int<1> sc_int_bit_ref; |
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36 | typedef sc_int<1> sc_int_bit_ref_r; |
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37 | |
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38 | |
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39 | #define MASK32(W) ((~ (const uint32)0) >> (sizeof (uint32) * 8 - W)) |
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40 | #define MASK64(W) ((~ (const uint64)0) >> (sizeof (uint64) * 8 - W)) |
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41 | |
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42 | template<int W> struct s_int_type { typedef int64 int_type; }; |
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43 | |
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44 | #define DECLAR_INT_TYPE(W) template<> struct s_int_type<W> { typedef smallest_int int_type; } // not declared as in8 because << operator threats like a character |
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45 | DECLAR_INT_TYPE(1); |
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46 | DECLAR_INT_TYPE(2); |
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47 | DECLAR_INT_TYPE(3); |
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48 | DECLAR_INT_TYPE(4); |
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49 | DECLAR_INT_TYPE(5); |
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50 | DECLAR_INT_TYPE(6); |
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51 | DECLAR_INT_TYPE(7); |
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52 | DECLAR_INT_TYPE(8); |
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53 | #undef DECLAR_INT_TYPE |
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54 | |
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55 | #define DECLAR_INT_TYPE(W) template<> struct s_int_type<W> { typedef int16 int_type; } |
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56 | DECLAR_INT_TYPE( 9); |
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57 | DECLAR_INT_TYPE(10); |
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58 | DECLAR_INT_TYPE(11); |
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59 | DECLAR_INT_TYPE(12); |
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60 | DECLAR_INT_TYPE(13); |
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61 | DECLAR_INT_TYPE(14); |
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62 | DECLAR_INT_TYPE(15); |
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63 | DECLAR_INT_TYPE(16); |
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64 | #undef DECLAR_INT_TYPE |
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65 | |
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66 | #define DECLAR_INT_TYPE(W) template<> struct s_int_type<W> { typedef int32 int_type; } |
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67 | DECLAR_INT_TYPE(17); |
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68 | DECLAR_INT_TYPE(18); |
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69 | DECLAR_INT_TYPE(19); |
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70 | DECLAR_INT_TYPE(20); |
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71 | DECLAR_INT_TYPE(21); |
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72 | DECLAR_INT_TYPE(22); |
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73 | DECLAR_INT_TYPE(23); |
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74 | DECLAR_INT_TYPE(24); |
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75 | DECLAR_INT_TYPE(25); |
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76 | DECLAR_INT_TYPE(26); |
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77 | DECLAR_INT_TYPE(27); |
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78 | DECLAR_INT_TYPE(28); |
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79 | DECLAR_INT_TYPE(29); |
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80 | DECLAR_INT_TYPE(30); |
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81 | DECLAR_INT_TYPE(31); |
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82 | DECLAR_INT_TYPE(32); |
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83 | #undef DECLAR_INT_TYPE |
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84 | |
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85 | // -------------------------------- |
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86 | // CLASS : sc_int_subref_r |
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87 | // |
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88 | // Used for range, concat functions |
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89 | |
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90 | class sc_int_subref_r { |
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91 | |
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92 | template <int W> friend class sc_dt::sc_int; |
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93 | int left, right; |
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94 | |
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95 | public : |
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96 | int64 val; |
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97 | sc_int_subref_r(int64 val_, int left_, int right_) { |
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98 | val = val_; left = left_; right = right_; |
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99 | } |
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100 | |
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101 | inline int64 read () const { return val; } |
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102 | inline const sc_int_subref_r& operator | (const sc_int_subref_r &v) const { |
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103 | print_warning (); |
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104 | return *this; |
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105 | } |
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106 | |
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107 | private : |
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108 | void print_warning () const; |
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109 | |
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110 | }; |
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111 | |
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112 | // |
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113 | // to fix : propagation of the sign flag |
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114 | // |
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115 | |
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116 | class sc_int_subref_r; |
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117 | |
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118 | template< int W /* = SC_INTWIDTH */> |
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119 | class sc_int { |
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120 | |
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121 | /***********************/ |
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122 | /* SYSTEMCASS SPECIFIC */ |
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123 | /***********************/ |
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124 | typedef sc_int<W> this_type; |
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125 | typedef typename s_int_type<W>::int_type data_type; |
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126 | |
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127 | typedef data_type sc_int_subref; |
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128 | |
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129 | // internal |
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130 | union { |
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131 | val_field<W, (sizeof (data_type) * 8) - W,data_type> vf; /* To compute */ |
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132 | data_type val; /* To return an int reference (read function) */ |
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133 | }; |
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134 | |
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135 | |
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136 | /***********************/ |
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137 | /* L R M */ |
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138 | /***********************/ |
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139 | public: |
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140 | sc_int() { val = 0; } |
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141 | sc_int (const char * a) { val = 0; write (std::atoi (a)); } |
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142 | sc_int (unsigned short a) { val = 0; write (a); } |
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143 | sc_int (short a) { val = 0; write (a); } |
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144 | sc_int (unsigned long a) { val = 0; write (a); } |
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145 | sc_int (long a) { val = 0; write (a); } |
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146 | sc_int (unsigned int a) { val = 0; write (a); } |
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147 | sc_int (int a) { val = 0; write (a); } |
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148 | sc_int (int64 a) { val = 0; write (a); } |
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149 | sc_int (uint64 a) { val = 0; write (a); } |
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150 | sc_int (double a) { val = 0; write (a); } |
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151 | |
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152 | template <int W2> sc_int (const sc_int<W2> &val_) { val = 0; write (val_.read());} |
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153 | /* this template doesn't redefine default copy constructor of sc_int. |
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154 | * So, we define by this way |
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155 | */ |
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156 | |
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157 | sc_int (const sc_int &val_) { val = val_.val; } |
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158 | sc_int (const sc_int_subref_r & a) { val = 0; write (a); } |
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159 | /* the user needs to cast explicitly result of range () method. */ |
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160 | |
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161 | |
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162 | /***********************/ |
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163 | /* SYSTEMCASS SPECIFIC */ |
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164 | /***********************/ |
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165 | |
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166 | // read/write |
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167 | inline const data_type& read() const { return val; } |
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168 | inline void write(data_type val_) { vf.valW = val_; } |
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169 | template <int W2> inline void write (const sc_int<W2> val_) { write (val_.read ()); } |
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170 | inline void write (const sc_int_subref_r& s) { write (s.read()); } |
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171 | |
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172 | /***********************/ |
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173 | /* L R M */ |
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174 | /***********************/ |
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175 | |
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176 | // operators |
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177 | inline operator const data_type & () const { |
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178 | return read (); |
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179 | } |
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180 | |
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181 | template <typename T> inline sc_int& operator = (const T& val_) { |
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182 | write (val_); |
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183 | return *this; |
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184 | } |
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185 | |
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186 | inline sc_int & operator = (const sc_int_subref_r& a) { |
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187 | write (a); |
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188 | return *this; |
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189 | } |
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190 | |
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191 | // explicit conversions |
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192 | inline uint32 to_uint() const { return val & MASK32(W); } |
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193 | inline int32 to_int() const { return val & MASK32(W); } |
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194 | inline uint64 to_uint64() const { return val & MASK64(W); } |
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195 | inline int64 to_int64() const { return val & MASK64(W); } |
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196 | |
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197 | // explicit conversion to character string |
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198 | const sc_string to_string(sc_numrep numrep = SC_DEC) const { |
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199 | return sc_dt::to_string (val, W, numrep); |
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200 | } |
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201 | const sc_string to_dec() const { return to_string (SC_DEC); } |
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202 | const sc_string to_bin() const { return to_string (SC_BIN); } |
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203 | const sc_string to_oct() const { return to_string (SC_OCT); } |
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204 | const sc_string to_hex() const { return to_string (SC_HEX); } |
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205 | |
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206 | // arithmetic |
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207 | #define DEFINE_OPERATOR(OPER) \ |
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208 | template <typename T> \ |
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209 | inline sc_int & operator OPER (T v) \ |
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210 | { vf.valW OPER v; return *this; } |
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211 | |
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212 | DEFINE_OPERATOR(<<=) |
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213 | DEFINE_OPERATOR(>>=) |
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214 | DEFINE_OPERATOR(+=) |
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215 | DEFINE_OPERATOR(-=) |
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216 | DEFINE_OPERATOR(*=) |
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217 | DEFINE_OPERATOR(/=) |
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218 | DEFINE_OPERATOR(%=) |
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219 | DEFINE_OPERATOR(&=) |
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220 | DEFINE_OPERATOR(|=) |
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221 | DEFINE_OPERATOR(^=) |
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222 | #undef DEFINE_OPERATOR |
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223 | |
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224 | inline sc_int_bit_ref & operator [] (int v) { |
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225 | return (vf.valW >> v) & 1; |
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226 | } |
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227 | inline sc_int_bit_ref_r & operator [] (int v) const { |
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228 | return (vf.valW >> v) & 1; |
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229 | } |
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230 | |
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231 | template <int W2> |
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232 | inline sc_int<W + W2> operator , (const sc_int<W2> & b) const { |
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233 | sc_int<W + W2> res = read() << W2; res += b.read(); |
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234 | return res; |
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235 | } |
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236 | |
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237 | inline sc_int<W + 1> operator , (bool b) const { |
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238 | sc_int<W + 1> res = read(); res <<= 1; res += b; |
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239 | return res; |
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240 | } |
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241 | |
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242 | template <int W2> |
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243 | inline sc_int<W2> operator , (const sc_int_subref_r &v) const { |
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244 | std::cerr << "Warning : \n"; |
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245 | return sc_int<W2> (v.read()); |
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246 | } |
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247 | |
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248 | inline sc_int_subref range (int left, int right) { |
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249 | return (data_type)((data_type) (((data_type)~(0)) >> (sizeof (data_type) * 8 - left - 1)) & val) >> right; |
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250 | } |
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251 | |
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252 | inline sc_int_subref_r range (int left, int right) const { |
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253 | return sc_int_subref_r (((data_type) (((data_type)~(0)) >> (sizeof (data_type) * 8 - left - 1)) & val) >> right, left, right); |
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254 | } |
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255 | #if 0 |
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256 | std::cerr << "range(" << left << "," << right << ")\n"; |
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257 | std::cerr << "val = " << val << "\n"; |
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258 | std::cerr << "~0 >> " << (sizeof (data_type) * 8 - left - 1) << " = " << (data_type) (((data_type)~(0)) >> (sizeof (data_type) * 8 - left - 1)) << "\n"; |
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259 | std::cerr << ((data_type) ((((data_type)~(0)) >> (sizeof (data_type) * 8 - left - 1)) & val) >> right) << "\n"; |
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260 | std::cerr << "data_type = " << sizeof (data_type) << "\n"; |
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261 | #endif |
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262 | |
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263 | }; |
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264 | |
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265 | inline std::ostream & operator << (std::ostream &o, const sc_int_subref_r & s) { |
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266 | return o << s.val; |
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267 | } |
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268 | |
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269 | #undef MASK32 |
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270 | #undef MASK64 |
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271 | |
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272 | } /* end of sc_dt namespace */ |
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273 | |
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274 | #endif /* __SC_INT_H__ */ |
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275 | |
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276 | /* |
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277 | # Local Variables: |
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278 | # tab-width: 4; |
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279 | # c-basic-offset: 4; |
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280 | # c-file-offsets:((innamespace . 0)(inline-open . 0)); |
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281 | # indent-tabs-mode: nil; |
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282 | # End: |
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283 | # |
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284 | # vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
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285 | */ |
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286 | |
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