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_bigint.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_BIGINT_H__ |
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13 | #define __SC_BIGINT_H__ |
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14 | |
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15 | #include <sc_bit.h> |
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16 | #include <sc_logic.h> |
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17 | #include <sc_bv.h> |
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18 | |
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19 | // ---------------------------------------------------------------------------- |
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20 | // CLASS : sc_bigint<W> |
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21 | // |
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22 | // ---------------------------------------------------------------------------- |
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23 | |
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24 | #include "sc_nbdefs.h" |
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25 | |
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26 | namespace sc_dt { |
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27 | |
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28 | // |
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29 | #define MASK32(W) ((~ (const uint32)0) >> (sizeof (uint32) * 8 - W)) |
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30 | #define MASK64(W) ((~ (const uint64)0) >> (sizeof (uint64) * 8 - W)) |
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31 | // |
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32 | |
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33 | template<int W> struct s_bigint_type { typedef uint64 uint_type;}; |
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34 | #define DECLAR_BIGINT_TYPE(W) template<> struct s_bigint_type<W> { typedef uint16 uint_type; }// not declared as uint16 because << operator threats like a character |
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35 | DECLAR_BIGINT_TYPE( 1); |
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36 | DECLAR_BIGINT_TYPE( 2); |
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37 | DECLAR_BIGINT_TYPE( 3); |
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38 | DECLAR_BIGINT_TYPE( 4); |
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39 | DECLAR_BIGINT_TYPE( 5); |
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40 | DECLAR_BIGINT_TYPE( 6); |
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41 | DECLAR_BIGINT_TYPE( 7); |
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42 | DECLAR_BIGINT_TYPE( 8); |
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43 | #undef DECLAR_BIGINT_TYPE |
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44 | #define DECLAR_BIGINT_TYPE(W) template<> struct s_bigint_type<W> { typedef uint16 uint_type; } |
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45 | DECLAR_BIGINT_TYPE( 9); |
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46 | DECLAR_BIGINT_TYPE(10); |
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47 | DECLAR_BIGINT_TYPE(11); |
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48 | DECLAR_BIGINT_TYPE(12); |
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49 | DECLAR_BIGINT_TYPE(13); |
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50 | DECLAR_BIGINT_TYPE(14); |
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51 | DECLAR_BIGINT_TYPE(15); |
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52 | DECLAR_BIGINT_TYPE(16); |
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53 | #undef DECLAR_BIGINT_TYPE |
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54 | #define DECLAR_BIGINT_TYPE(W) template<> struct s_bigint_type<W> { typedef uint32 uint_type; } |
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55 | DECLAR_BIGINT_TYPE(17); |
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56 | DECLAR_BIGINT_TYPE(18); |
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57 | DECLAR_BIGINT_TYPE(19); |
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58 | DECLAR_BIGINT_TYPE(20); |
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59 | DECLAR_BIGINT_TYPE(21); |
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60 | DECLAR_BIGINT_TYPE(22); |
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61 | DECLAR_BIGINT_TYPE(23); |
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62 | DECLAR_BIGINT_TYPE(24); |
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63 | DECLAR_BIGINT_TYPE(25); |
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64 | DECLAR_BIGINT_TYPE(26); |
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65 | DECLAR_BIGINT_TYPE(27); |
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66 | DECLAR_BIGINT_TYPE(28); |
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67 | DECLAR_BIGINT_TYPE(29); |
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68 | DECLAR_BIGINT_TYPE(30); |
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69 | DECLAR_BIGINT_TYPE(31); |
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70 | DECLAR_BIGINT_TYPE(32); |
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71 | #undef DECLAR_BIGINT_TYPE |
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72 | |
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73 | template< int W /* = SC_INTWIDTH */> |
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74 | class sc_bigint |
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75 | { |
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76 | typedef sc_bigint<W> this_type; |
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77 | typedef typename s_int_type<W>::int_type data_type; |
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78 | |
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79 | typedef data_type sc_uint_subref; |
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80 | typedef data_type sc_uint_subref_r; |
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81 | |
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82 | union { |
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83 | data_type valW:W; |
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84 | bool valB[W]; |
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85 | data_type val; |
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86 | }; |
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87 | void check () |
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88 | { if (W > 64) { std::cerr << "sc_bigint with W > 64 is not supported.\n"; exit (20040528); } } |
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89 | public: |
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90 | sc_bigint() { check (); val = 0; } |
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91 | sc_bigint(data_type val_) { check (); val = 0; write (val_); } |
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92 | template <int W2> explicit sc_bigint (const sc_bigint<W2> &val_) { write (val_.read());} |
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93 | |
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94 | inline const data_type& read() const { return val; } |
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95 | inline operator const data_type& () const { return read (); } |
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96 | // inline void write(int64 val_) { val = val_ & MASK64(W); } |
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97 | // inline void write(signed int val_) { val = val_ & MASK32(W); } |
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98 | inline void write(data_type val_) { valW = val_; } |
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99 | template <int W2> inline void write (const sc_bigint<W2> val_) { write (val_.read ()); } |
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100 | inline void write (const sc_bigint<W> val_) { write (val_.read()); }; |
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101 | template <typename T> inline sc_bigint& operator = (const T& val_) { write (val_); return *this; } |
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102 | |
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103 | inline uint32 to_uint () const {return val & MASK32(W);}; |
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104 | inline int32 to_int () const {return val & MASK32(W);}; |
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105 | inline uint64 to_uint64 () const {return val & MASK64(W);}; |
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106 | inline int64 to_int64 () const {return val & MASK64(W);}; |
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107 | |
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108 | template <typename T> |
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109 | inline sc_bigint& operator <<= (T v) |
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110 | { valW <<= v; return *this; } |
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111 | template <typename T> |
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112 | inline sc_bigint& operator >>= (T v) |
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113 | { valW >>= v; return *this; } |
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114 | template <typename T> |
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115 | inline sc_bigint& operator += (T v) |
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116 | { valW += v; return *this; } |
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117 | template <typename T> |
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118 | inline sc_bigint& operator -= (T v) |
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119 | { valW -= v; return *this; } |
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120 | template <typename T> |
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121 | inline sc_bigint& operator *= (T v) |
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122 | { valW *= v; return *this; } |
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123 | template <typename T> |
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124 | inline sc_bigint& operator /= (T v) |
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125 | { valW /= v; return *this; } |
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126 | template <typename T> |
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127 | inline sc_bigint& operator %= (T v) |
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128 | { valW %= v; return *this; } |
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129 | template <typename T> |
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130 | inline sc_bigint& operator &= (T v) |
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131 | { valW &= v; return *this; } |
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132 | template <typename T> |
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133 | inline sc_bigint& operator |= (T v) |
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134 | { valW |= v; return *this; } |
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135 | template <typename T> |
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136 | inline sc_bigint& operator ^= (T v) |
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137 | { valW ^= v; return *this; } |
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138 | inline sc_uint_bit_ref& operator [] (int v) |
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139 | { return valB[v]; } |
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140 | inline sc_uint_bit_ref_r& operator [] (int v) const |
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141 | { return valB[v]; } |
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142 | inline sc_uint_subref range (int left, int right) |
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143 | { return (((~0) >> (sizeof (data_type) * 8 - left)) & val) >> right; } |
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144 | inline sc_uint_subref_r range (int left, int right) const |
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145 | { return (((~0) >> (sizeof (data_type) * 8 - left)) & val) >> right; } |
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146 | }; |
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147 | |
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148 | } /* end of sc_dt namespace */ |
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149 | |
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150 | #endif /* __SC_BIGINT_H__ */ |
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