-#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
*/
-#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 {EVEN=0x00, ZERO=0x01, UP=0x10, DOWN=0x11} 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
}