5f6657a227
Adds a 16x16 divider to go with the multiplier. The divider is a single stage with no pipelining, which works at the slow 2MHz frequency. Doing this lowers the maximum clock frequency to 5. This is acceptable for now but means that the cpu can't be run at 14, which is the maximum frequency.
65 lines
3.3 KiB
VHDL
65 lines
3.3 KiB
VHDL
////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2013-2022 Efinix Inc. All rights reserved.
|
|
//
|
|
// This document contains proprietary information which is
|
|
// protected by copyright. All rights are reserved. This notice
|
|
// refers to original work by Efinix, Inc. which may be derivitive
|
|
// of other work distributed under license of the authors. In the
|
|
// case of derivative work, nothing in this notice overrides the
|
|
// original author's license agreement. Where applicable, the
|
|
// original license agreement is included in it's original
|
|
// unmodified form immediately below this header.
|
|
//
|
|
// WARRANTY DISCLAIMER.
|
|
// THE DESIGN, CODE, OR INFORMATION ARE PROVIDED “AS IS” AND
|
|
// EFINIX MAKES NO WARRANTIES, EXPRESS OR IMPLIED WITH
|
|
// RESPECT THERETO, AND EXPRESSLY DISCLAIMS ANY IMPLIED WARRANTIES,
|
|
// INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
|
|
// MERCHANTABILITY, NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR
|
|
// PURPOSE. SOME STATES DO NOT ALLOW EXCLUSIONS OF AN IMPLIED
|
|
// WARRANTY, SO THIS DISCLAIMER MAY NOT APPLY TO LICENSEE.
|
|
//
|
|
// LIMITATION OF LIABILITY.
|
|
// NOTWITHSTANDING ANYTHING TO THE CONTRARY, EXCEPT FOR BODILY
|
|
// INJURY, EFINIX SHALL NOT BE LIABLE WITH RESPECT TO ANY SUBJECT
|
|
// MATTER OF THIS AGREEMENT UNDER TORT, CONTRACT, STRICT LIABILITY
|
|
// OR ANY OTHER LEGAL OR EQUITABLE THEORY (I) FOR ANY INDIRECT,
|
|
// SPECIAL, INCIDENTAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES OF ANY
|
|
// CHARACTER INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF
|
|
// GOODWILL, DATA OR PROFIT, WORK STOPPAGE, OR COMPUTER FAILURE OR
|
|
// MALFUNCTION, OR IN ANY EVENT (II) FOR ANY AMOUNT IN EXCESS, IN
|
|
// THE AGGREGATE, OF THE FEE PAID BY LICENSEE TO EFINIX HEREUNDER
|
|
// (OR, IF THE FEE HAS BEEN WAIVED, $100), EVEN IF EFINIX SHALL HAVE
|
|
// BEEN INFORMED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO
|
|
// NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR
|
|
// CONSEQUENTIAL DAMAGES, SO THIS LIMITATION AND EXCLUSION MAY NOT
|
|
// APPLY TO LICENSEE.
|
|
//
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
------------- Begin Cut here for COMPONENT Declaration ------
|
|
COMPONENT divider is
|
|
PORT (
|
|
numer : in std_logic_vector(15 downto 0);
|
|
denom : in std_logic_vector(15 downto 0);
|
|
clken : in std_logic;
|
|
clk : in std_logic;
|
|
reset : in std_logic;
|
|
quotient : out std_logic_vector(15 downto 0);
|
|
remain : out std_logic_vector(15 downto 0);
|
|
rfd : out std_logic);
|
|
END COMPONENT;
|
|
---------------------- End COMPONENT Declaration ------------
|
|
|
|
------------- Begin Cut here for INSTANTIATION Template -----
|
|
u_divider : divider
|
|
PORT MAP (
|
|
numer => numer,
|
|
denom => denom,
|
|
clken => clken,
|
|
clk => clk,
|
|
reset => reset,
|
|
quotient => quotient,
|
|
remain => remain,
|
|
rfd => rfd);
|
|
------------------------ End INSTANTIATION Template ---------
|