Tester based on Handbook of Floating-Point Arithmetic 1.1

[ipdf/code.git] / src / real.h

diff --git a/src/real.h b/src/real.h
index 5703671..f052696 100644 (file)
--- a/src/real.h
+++ b/src/real.h
@@ -3,54 +3,43 @@
 
 #include "common.h"
 
-namespace IPDF
-{
+#define REAL_SINGLE 0
+#define REAL_DOUBLE 1
+#define REAL_LONG_DOUBLE 2
+#define REAL_SINGLE_FAST2SUM 3
+
+#ifndef REAL
+       #error "REAL was not defined!"
+#endif
 
-#define REAL_SINGLE
-//#define REAL_DOUBLE
-//#define REAL_HALF
+#if REAL >= REAL_SINGLE_FAST2SUM
+       #include "real_fast2sum.h"
+#endif //REAL
 
-#ifdef REAL_SINGLE
+namespace IPDF
+{      
+       extern const char * g_real_name[];
+
+#if REAL == REAL_SINGLE
        typedef float Real;
-       inline float Float(Real r) {return r;}
-#elif defined REAL_DOUBLE
+#elif REAL == REAL_DOUBLE
        typedef double Real;
-       inline double Float(Real r) {return r;}
-#elif defined REAL_HALF
-       struct Real
-       {
-               Real() = default;
-               Real(double r) : value(r) 
-               {
-                       int & a = *((int*)(&value)); // um...
-                       // mask out extra bits in exponent
-                        //1000 1111 1000 0000 0000 0011 1111 1111
-                       // Endianness matters
-                       a &= 0xFFC001F1; //0x8F8003FF;
-
-               }       
-       
-               Real operator+(float f) const {return Real(value+f);}
-               Real operator-(float f) const {return Real(value+f);}
-               Real operator/(float f) const {return Real(value/f);}
-               Real operator*(float f) const {return Real(value*f);}
-               Real operator+(const Real & r) const {return Real(this->value + r.value);}
-               Real operator-(const Real & r) const {return Real(this->value - r.value);}
-               Real operator*(const Real & r) const {return Real(this->value * r.value);}
-               Real operator/(const Real & r) const {return Real(this->value / r.value);}
-               Real & operator+=(const Real & r) {this->value += r.value; return *this;}
-               Real & operator-=(const Real & r) {this->value -= r.value; return *this;}
-               Real & operator/=(const Real & r) {this->value /= r.value; return *this;}
-               Real & operator*=(const Real & r) {this->value *= r.value; return *this;}
-
-               float value;
-       };
-       inline float Float(Real r) {return r.value;}
-
-       inline std::ostream & operator<<(std::ostream & os, Real & r) {return os << r.value;} // yuk
-
-#endif //REAL_HALF
-
+#elif REAL == REAL_LONG_DOUBLE
+       typedef long double Real;
+#elif REAL == REAL_SINGLE_FAST2SUM
+       typedef RealF2S<float> Real;
+       inline float Float(Real r) {return r.m_value;}
+               
+#else
+       #error "Type of Real unspecified."
+#endif //REAL
+
+       // Allow us to call Float on the primative types
+       // Useful so I can template some things that could be either (a more complicated) Real or a primitive type
+       // Mostly in the testers.
+       inline float Float(float f) {return f;}
+       inline double Float(double f) {return f;}
+       inline long double Float(long double f) {return f;}
 }
 
 #endif //_REAL_H