X-Git-Url: https://git.ucc.asn.au/?p=ipdf%2Fcode.git;a=blobdiff_plain;f=src%2Fvfpu.h;h=d77c1e330383d2082118d8aed94256e2ebb8b9f3;hp=c489e89a05141896ad844f493e35da6bdc602b82;hb=6ad7fc3c833837713405b64a50e62dd128cb7a30;hpb=79d61ba24ac2d29cea6e7f1fee2f83705c5fb4ac

diff --git a/src/vfpu.h b/src/vfpu.h
index c489e89..d77c1e3 100644
--- a/src/vfpu.h
+++ b/src/vfpu.h
@@ -1,32 +1,21 @@
-#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(); // Starts the 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; // 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); // operate with registers
-	extern float Exec(float a, float b, Opcode op); //converts floats into registers and back
+	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
 }
 
 #endif //_VFPU_H