An interface for a FPU compiled from VHDL

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

diff --git a/src/vfpu.h b/src/vfpu.h
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+#ifndef _VFPU_H
+#define _VFPU_H
+
+/**
+ * Implements a terrible and hacky interface to use a virtual FPU to do floating point operations
+ */
+
+namespace VFPU
+{
+       extern int Start(); // 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 float Register;
+       
+       extern Register Exec(const Register & a, const Register & b, Opcode op);
+
+}
+
+#endif //_VFPU_H
+
+