plasma with FPU :: Overview

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Name: plasma_fpu
Created: Jul 1, 2015
Updated: Feb 17, 2019
SVN Updated: Jul 7, 2015
SVN: Browse
Latest version: download (might take a bit to start...)
Statistics: View
Bugs: 1 reported / 0 solved
Star0you like it: star it!

Other project properties

Development status:Stable
Additional info:
WishBone compliant: No
WishBone version: n/a
License: Others


This project is based on an implementation of MIPS I specified core by Steve Rhoads: plasma


entity plasma is


   core_idx : natural := 0;

   FPU_FLAG : string := "OF";

   SIM_FLAG : string := "ON";

   DEBUG_FLAG : string := "OF"



   clk : in std_logic;

   rst : in std_logic;

   instr_addr : out std_logic_vector(31 downto 0);

   data_addr : out std_logic_vector(31 downto 0);

   rd_mask : out std_logic_vector(3 downto 0);

   wr_mask : out std_logic_vector(3 downto 0);

   instr_stall : in std_logic;

   data_stall : in std_logic;

   instr_in : in std_logic_vector(31 downto 0);

   data_to_cpu : in std_logic_vector(31 downto 0);

   data_from_cpu : out std_logic_vector(31 downto 0)


end entity plasma;

generic flags controls choice of intern components:

flag meaning
core_idx for many core simulation this flag identifies particular core (simulation only)
FPU_FLAG "ON" activates simulative FPU components
SIM_FLAG "ON" activates calculation from extern libraries and accelerates simulation, "OF" makes the core synthesizable
DEBUG_FLAG "ON" activates verbose debugging output, each register file access is reported (simulation only)

Intern structure


Simulative test

1. execute

2. go to (automatically create) directore "workspace"

3. execute "" script

The program executes an encoding algorithm that converts an .bmp file to .jp2 file (JPEG2000 format). Source code is from openJPEG project. The folder test/program contains simulation output (file "memory_out.mem") and a script "" can generate a binary from this output. By replacing the file "test.bmp" and executing script "" the given .bmp file will be converted by simulation run.

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