/////////////////////////////////////////////////////////////////////////                                                             ////////  OpenCores54 DSP, ALU defines                               ////////                                                             ////////  Author: Richard Herveille                                  ////////          richard@asics.ws                                   ////////          www.asics.ws                                       ////////                                                             /////////////////////////////////////////////////////////////////////////////                                                             //////// Copyright (C) 2002 Richard Herveille                        ////////                    richard@asics.ws                         ////////                                                             //////// This source file may be used and distributed without        //////// restriction provided that this copyright statement is not   //////// removed from the file and that any derivative work contains //////// the original copyright notice and the associated disclaimer.////////                                                             ////////     THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY     //////// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED   //////// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS   //////// FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE AUTHOR      //////// OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,         //////// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES    //////// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE   //////// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR        //////// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF  //////// LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT  //////// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT  //////// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE         //////// POSSIBILITY OF SUCH DAMAGE.                                 ////////                                                             /////////////////////////////////////////////////////////////////////////																	 //  CVS Log														     //																     //  $Id: oc54_alu_defines.v,v 1.1.1.1 2002/04/10 09:34:40 rherveille Exp $														     //																     //  $Date: 2002/04/10 09:34:40 $														 //  $Revision: 1.1.1.1 $													 //  $Author: rherveille $													     //  $Locker:  $													     //  $State: Exp $														 //																     // Change History:												     //               $Log: oc54_alu_defines.v,v $//               Revision 1.1.1.1  2002/04/10 09:34:40  rherveille//               Initial relase OpenCores54x DSP (CPU)//											 																//// Encoding: bit[6] always zero//           bit[5:4] instuction type//           - 00: (dual) arithmetic//           - 01: logical (incl. shift)//           - 10: bit-test & compare//           - 11: reserved// Leonardo-Spectrum seems to like the additional zero bit[6] in// the encoding scheme. It produces the smallest and fastest code // like this. (Why ???)////// arithmetic instructions//`define ABS      7'b000_0000`define NEG      7'b000_0001`define ADD      7'b000_0010`define SUB      7'b000_0011`define MAX      7'b000_0100`define SUBC     7'b000_0101//// dual arithmetic instructions//`define DADD     7'b000_1000`define DSUB     7'b000_1100`define DRSUB    7'b000_1101`define DSUBADD  7'b000_1110`define DADDSUB  7'b000_1001//// logical instructions//`define NOT      7'b001_0000`define AND      7'b001_0001`define OR       7'b001_0010`define XOR      7'b001_0011//// shift instructions//`define ROL      7'b001_0100`define ROLTC    7'b001_0101`define ROR      7'b001_0110`define SHFT_CMP 7'b001_0111//// bit test instructions//`define BITF     7'b010_0000`define BTST     7'b010_0001`define CMP_EQ   7'b010_0100`define CMP_LT   7'b010_0101`define CMP_GT   7'b010_0110`define CMP_NEQ  7'b010_0111//// condition codes for CMP-test//`define EQ  2'b00`define LT  2'b01`define GT  2'b10`define NEQ 2'b11