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madsilicon |
-----------------------------------------------------------------
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-- --
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-----------------------------------------------------------------
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-- --
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-- Copyright (C) 2015 Stefano Tonello --
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-- --
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-- This source file may be used and distributed without --
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-- restriction provided that this copyright statement is not --
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-- removed from the file and that any derivative work contains --
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-- the original copyright notice and the associated disclaimer.--
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-- --
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-- THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY --
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-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED --
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-- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS --
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-- FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE AUTHOR --
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-- OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, --
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-- INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES --
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-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE --
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-- GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR --
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-- BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF --
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-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT --
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-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT --
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-- OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE --
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-- POSSIBILITY OF SUCH DAMAGE. --
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-- --
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-----------------------------------------------------------------
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---------------------------------------------------------------
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-- RV01 logic (boolean) unit
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---------------------------------------------------------------
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library IEEE;
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use IEEE.std_logic_1164.all;
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use IEEE.numeric_std.all;
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library WORK;
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use WORK.RV01_CONSTS_PKG.all;
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use WORK.RV01_TYPES_PKG.all;
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use WORK.RV01_ARITH_PKG.all;
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entity RV01_LOGICU is
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port(
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CTRL_i : in LOG_CTRL;
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OPA_i : in SDWORD_T;
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OPB_i : in SDWORD_T;
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RES_o : out SDWORD_T
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);
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end RV01_LOGICU;
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architecture ARC of RV01_LOGICU is
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begin
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process(CTRL_i,OPA_i,OPB_i)
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begin
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case CTRL_i is
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when LC_AND =>
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RES_o(SDLEN-1 downto 0) <= (OPA_i and OPB_i);
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when LC_OR =>
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RES_o(SDLEN-1 downto 0) <= (OPA_i or OPB_i);
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when others => --LC_XOR
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RES_o(SDLEN-1 downto 0) <= (OPA_i xor OPB_i);
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end case;
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end process;
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end ARC;
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