00001 00030 #ifndef FIX_BASE_H 00031 #define FIX_BASE_H 00032 00033 #include <itpp/base/ittypes.h> 00034 #include <itpp/stat/misc_stat.h> 00035 00036 00037 namespace itpp { 00038 00880 00881 00883 typedef int64_t fixrep; 00885 const int MAX_WORDLEN = 64; 00886 00888 const uint64_t UINT64_POW2[64] = { 00889 uint64_t(1), uint64_t(1)<<1, uint64_t(1)<<2, uint64_t(1)<<3, uint64_t(1)<<4, 00890 uint64_t(1)<<5, uint64_t(1)<<6, uint64_t(1)<<7, uint64_t(1)<<8, uint64_t(1)<<9, 00891 uint64_t(1)<<10, uint64_t(1)<<11, uint64_t(1)<<12, uint64_t(1)<<13, uint64_t(1)<<14, 00892 uint64_t(1)<<15, uint64_t(1)<<16, uint64_t(1)<<17, uint64_t(1)<<18, uint64_t(1)<<19, 00893 uint64_t(1)<<20, uint64_t(1)<<21, uint64_t(1)<<22, uint64_t(1)<<23, uint64_t(1)<<24, 00894 uint64_t(1)<<25, uint64_t(1)<<26, uint64_t(1)<<27, uint64_t(1)<<28, uint64_t(1)<<29, 00895 uint64_t(1)<<30, uint64_t(1)<<31, uint64_t(1)<<32, uint64_t(1)<<33, uint64_t(1)<<34, 00896 uint64_t(1)<<35, uint64_t(1)<<36, uint64_t(1)<<37, uint64_t(1)<<38, uint64_t(1)<<39, 00897 uint64_t(1)<<40, uint64_t(1)<<41, uint64_t(1)<<42, uint64_t(1)<<43, uint64_t(1)<<44, 00898 uint64_t(1)<<45, uint64_t(1)<<46, uint64_t(1)<<47, uint64_t(1)<<48, uint64_t(1)<<49, 00899 uint64_t(1)<<50, uint64_t(1)<<51, uint64_t(1)<<52, uint64_t(1)<<53, uint64_t(1)<<54, 00900 uint64_t(1)<<55, uint64_t(1)<<56, uint64_t(1)<<57, uint64_t(1)<<58, uint64_t(1)<<59, 00901 uint64_t(1)<<60, uint64_t(1)<<61, uint64_t(1)<<62, uint64_t(1)<<63 00902 }; 00903 00905 const double DOUBLE_POW2[128] = { 00906 0.5/UINT64_POW2[63], 1.0/UINT64_POW2[63], 1.0/UINT64_POW2[62], 1.0/UINT64_POW2[61], 00907 1.0/UINT64_POW2[60], 1.0/UINT64_POW2[59], 1.0/UINT64_POW2[58], 1.0/UINT64_POW2[57], 00908 1.0/UINT64_POW2[56], 1.0/UINT64_POW2[55], 1.0/UINT64_POW2[54], 1.0/UINT64_POW2[53], 00909 1.0/UINT64_POW2[52], 1.0/UINT64_POW2[51], 1.0/UINT64_POW2[50], 1.0/UINT64_POW2[49], 00910 1.0/UINT64_POW2[48], 1.0/UINT64_POW2[47], 1.0/UINT64_POW2[46], 1.0/UINT64_POW2[45], 00911 1.0/UINT64_POW2[44], 1.0/UINT64_POW2[43], 1.0/UINT64_POW2[42], 1.0/UINT64_POW2[41], 00912 1.0/UINT64_POW2[40], 1.0/UINT64_POW2[39], 1.0/UINT64_POW2[38], 1.0/UINT64_POW2[37], 00913 1.0/UINT64_POW2[36], 1.0/UINT64_POW2[35], 1.0/UINT64_POW2[34], 1.0/UINT64_POW2[33], 00914 1.0/UINT64_POW2[32], 1.0/UINT64_POW2[31], 1.0/UINT64_POW2[30], 1.0/UINT64_POW2[29], 00915 1.0/UINT64_POW2[28], 1.0/UINT64_POW2[27], 1.0/UINT64_POW2[26], 1.0/UINT64_POW2[25], 00916 1.0/UINT64_POW2[24], 1.0/UINT64_POW2[23], 1.0/UINT64_POW2[22], 1.0/UINT64_POW2[21], 00917 1.0/UINT64_POW2[20], 1.0/UINT64_POW2[19], 1.0/UINT64_POW2[18], 1.0/UINT64_POW2[17], 00918 1.0/UINT64_POW2[16], 1.0/UINT64_POW2[15], 1.0/UINT64_POW2[14], 1.0/UINT64_POW2[13], 00919 1.0/UINT64_POW2[12], 1.0/UINT64_POW2[11], 1.0/UINT64_POW2[10], 1.0/UINT64_POW2[9], 00920 1.0/UINT64_POW2[8], 1.0/UINT64_POW2[7], 1.0/UINT64_POW2[6], 1.0/UINT64_POW2[5], 00921 1.0/UINT64_POW2[4], 1.0/UINT64_POW2[3], 1.0/UINT64_POW2[2], 1.0/UINT64_POW2[1], 00922 1.0, 1.0*UINT64_POW2[1], 1.0*UINT64_POW2[2], 1.0*UINT64_POW2[3], 00923 1.0*UINT64_POW2[4], 1.0*UINT64_POW2[5], 1.0*UINT64_POW2[6], 1.0*UINT64_POW2[7], 00924 1.0*UINT64_POW2[8], 1.0*UINT64_POW2[9], 1.0*UINT64_POW2[10], 1.0*UINT64_POW2[11], 00925 1.0*UINT64_POW2[12], 1.0*UINT64_POW2[13], 1.0*UINT64_POW2[14], 1.0*UINT64_POW2[15], 00926 1.0*UINT64_POW2[16], 1.0*UINT64_POW2[17], 1.0*UINT64_POW2[18], 1.0*UINT64_POW2[19], 00927 1.0*UINT64_POW2[20], 1.0*UINT64_POW2[21], 1.0*UINT64_POW2[22], 1.0*UINT64_POW2[23], 00928 1.0*UINT64_POW2[24], 1.0*UINT64_POW2[25], 1.0*UINT64_POW2[26], 1.0*UINT64_POW2[27], 00929 1.0*UINT64_POW2[28], 1.0*UINT64_POW2[29], 1.0*UINT64_POW2[30], 1.0*UINT64_POW2[31], 00930 1.0*UINT64_POW2[32], 1.0*UINT64_POW2[33], 1.0*UINT64_POW2[34], 1.0*UINT64_POW2[35], 00931 1.0*UINT64_POW2[36], 1.0*UINT64_POW2[37], 1.0*UINT64_POW2[38], 1.0*UINT64_POW2[39], 00932 1.0*UINT64_POW2[40], 1.0*UINT64_POW2[41], 1.0*UINT64_POW2[42], 1.0*UINT64_POW2[43], 00933 1.0*UINT64_POW2[44], 1.0*UINT64_POW2[45], 1.0*UINT64_POW2[46], 1.0*UINT64_POW2[47], 00934 1.0*UINT64_POW2[48], 1.0*UINT64_POW2[49], 1.0*UINT64_POW2[50], 1.0*UINT64_POW2[51], 00935 1.0*UINT64_POW2[52], 1.0*UINT64_POW2[53], 1.0*UINT64_POW2[54], 1.0*UINT64_POW2[55], 00936 1.0*UINT64_POW2[56], 1.0*UINT64_POW2[57], 1.0*UINT64_POW2[58], 1.0*UINT64_POW2[59], 00937 1.0*UINT64_POW2[60], 1.0*UINT64_POW2[61], 1.0*UINT64_POW2[62], 1.0*UINT64_POW2[63] 00938 }; 00939 00941 enum e_mode { 00942 TC, 00943 US 00944 }; 00945 00947 enum o_mode { 00948 SAT, 00949 SAT_ZERO, 00950 SAT_SYM, 00951 WRAP, 00952 WRAP_SM 00953 }; 00954 00956 enum q_mode { 00957 RND, 00958 RND_ZERO, 00959 RND_MIN_INF, 00960 RND_INF, 00961 RND_CONV, 00962 RND_CONV_ODD, 00963 TRN, 00964 TRN_ZERO 00965 }; 00966 00968 enum output_mode { 00969 OUTPUT_FIX, 00970 OUTPUT_FIX_SHIFT, 00971 OUTPUT_FLOAT, 00972 OUTPUT_FLOAT_SHIFT 00973 }; 00974 00980 class Fix_Base { 00981 public: 00983 explicit Fix_Base(int s=0, int w=MAX_WORDLEN, e_mode e=TC, o_mode o=WRAP, q_mode q=TRN, Stat *ptr=0) 00984 : shift(s), wordlen(w), emode(e), omode(o), qmode(q), stat_ptr(ptr) {init();} 00986 Fix_Base(const Fix_Base &x) 00987 : shift(x.shift), wordlen(MAX_WORDLEN), emode(TC), omode(WRAP), qmode(TRN), stat_ptr(0) {init();} 00989 virtual ~Fix_Base() {} 00990 00992 void set_shift(int s) {shift = s;} 00994 static void set_output_mode(output_mode o) {outputmode = o;} 00996 static void set_output_mode(std::string o); 00997 00999 int get_shift() const {return shift;} 01001 int get_wordlen() const {return wordlen;} 01003 e_mode get_e_mode() const {return emode;} 01005 o_mode get_o_mode() const {return omode;} 01007 q_mode get_q_mode() const {return qmode;} 01009 output_mode get_output_mode() const {return outputmode;} 01011 fixrep get_max() const {return max;} 01013 fixrep get_min() const {return min;} 01015 virtual void print() const; 01016 01017 protected: 01019 int shift; 01021 int wordlen; 01023 e_mode emode; 01025 o_mode omode; 01027 q_mode qmode; 01029 Stat *stat_ptr; 01031 fixrep min; 01033 fixrep max; 01035 int n_unused_bits; 01036 01038 void init(); 01040 fixrep apply_o_mode(fixrep x) const; 01042 fixrep scale_and_apply_modes(double x) const {return scale_and_apply_modes(x, qmode);} 01044 fixrep scale_and_apply_modes(double x, q_mode q) const; 01046 fixrep rshift_and_apply_q_mode(fixrep x, int n) const {return rshift_and_apply_q_mode(x, n, qmode);} 01048 fixrep rshift_and_apply_q_mode(fixrep x, int n, q_mode q) const; 01049 01050 private: 01052 static output_mode outputmode; 01053 }; 01054 01056 inline std::ostream &operator<<(std::ostream &os, const output_mode &o) 01057 { 01058 Fix_Base::set_output_mode(o); 01059 return os; 01060 } 01061 01063 01064 } // namespace itpp 01065 01066 #endif // #ifndef FIX_BASE_H
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