X-Git-Url: https://git.ucc.asn.au/?p=ipdf%2Fcode.git;a=blobdiff_plain;f=src%2Fvfpu.h;h=cb7fe50592b18f1d4f9da5beb59c39dcdfeae1b1;hp=12ac9bc389ffc0126ea668fc15c296a32d62a40f;hb=0ce8df17fae3ec986bd9570e5552aed92c080088;hpb=67fb91aae1fc5315f462d6b5818806f154e9e687

diff --git a/src/vfpu.h b/src/vfpu.h
index 12ac9bc..cb7fe50 100644
--- a/src/vfpu.h
+++ b/src/vfpu.h
@@ -1,33 +1,95 @@
-#ifndef _VFPU_H
-#define _VFPU_H
-
 /**
- * Implements a terrible and hacky interface to use a virtual FPU to do floating point operations
+ * @file vfpu.h
+ * @brief Implements a terrible and hacky interface to use a virtual FPU to do floating point operations
+ * 	Updated with even more terror! Whatever floats the boat!
  */
 
-#include <bitset>
+#ifndef _VFPU_H
+#define _VFPU_H
 
+#include <bitset>
 namespace VFPU
 {
 	extern int Start(const char * vcd_output = NULL); // Starts the VFPU
 	extern int Halt(); // Halts the VFPU
-
-/**
-		-- 000 = add, 
-		-- 001 = substract, 
-		-- 010 = multiply, 
-		-- 011 = divide,
-		-- 100 = square root
-		-- 101 = unused
-		-- 110 = unused
-		-- 111 = unused
- */
-	typedef enum {ADD=0x000, SUB=0x001, MULT=0x010, DIV=0x011, SQRT=0x100} Opcode;
-	typedef enum {EVEN=0x00, ZERO=0x01, UP=0x10, DOWN=0x11} Rmode;
+	typedef enum {ADD=0x0, SUB=0x1, MULT=0x2, DIV=0x3, SQRT=0x4} Opcode;
+	typedef enum {EVEN=0x0, ZERO=0x1, UP=0x2, DOWN=0x3} Rmode; // Rounding mode; to even, towards zero, always up, always down
 	typedef std::bitset<32> Register;
-	
 	extern Register Exec(const Register & a, const Register & b, Opcode op, Rmode rmode = EVEN); // operate with registers
 	extern float Exec(float a, float b, Opcode op, Rmode rmode = EVEN); //converts floats into registers and back
+	
+	/**
+	 * Wrapper class for floats where operations are done on the VFPU
+	 */
+	class VFloat
+	{
+		public:
+			VFloat(float f = 0) : m_value(f) 
+			{
+				static bool init = false;
+				if (!init)
+				{
+					init = true;
+					VFPU::Start("flops.vcd");
+				}
+			}
+			VFloat(const VFloat & cpy) : m_value(cpy.m_value) {}
+			virtual ~VFloat() 
+			{
+
+			}
+			
+			VFloat & operator+=(const VFloat & op)
+			{
+				m_value = Exec(m_value, op.m_value, ADD);
+				return *this;
+			}
+			VFloat & operator-=(const VFloat & op)
+			{
+				m_value = Exec(m_value, op.m_value, SUB);
+				return *this;
+			}
+			VFloat & operator*=(const VFloat & op)
+			{
+				m_value = Exec(m_value, op.m_value, MULT);
+				return *this;
+			}
+			VFloat & operator/=(const VFloat & op)
+			{
+				m_value = Exec(m_value, op.m_value, DIV);
+				return *this;
+			}
+			
+			VFloat operator+(const VFloat & op) const {VFloat f(*this); f+=op; return f;}
+			VFloat operator-(const VFloat & op) const {VFloat f(*this); f-=op; return f;}
+			VFloat operator*(const VFloat & op) const {VFloat f(*this); f*=op; return f;}
+			VFloat operator/(const VFloat & op) const {VFloat f(*this); f/=op; return f;}
+			
+			bool operator==(const VFloat & op) const
+			{
+				VFloat f(op);
+				f -= *this;
+				return (f.m_value == 0);				
+			}
+			bool operator!=(const VFloat & op) const {return !this->operator==(op);}
+			bool operator<(const VFloat & op) const
+			{
+				VFloat f(op);
+				f -= *this;
+				return (f.m_value > 0);
+			}
+			bool operator<=(const VFloat & op) const
+			{
+				VFloat f(op);
+				f -= *this;
+				return (f.m_value >= 0);				
+			}
+			bool operator>(const VFloat & op) const {return !this->operator<=(op);}
+			bool operator>=(const VFloat & op) const {return !this->operator<(op);}
+			
+			float m_value;
+			
+	};
 }
 
 #endif //_VFPU_H