/******************************************************************************/
/* */
/* Copyright (c) 1999 Sun Microsystems, Inc. All rights reserved. */
/* */
/* The contents of this file are subject to the current version of the Sun */
/* Community Source License, microSPARCII ("the License"). You may not use */
/* this file except in compliance with the License. You may obtain a copy */
/* of the License by searching for "Sun Community Source License" on the */
/* World Wide Web at http://www.sun.com. See the License for the rights, */
/* obligations, and limitations governing use of the contents of this file. */
/* */
/* Sun Microsystems, Inc. has intellectual property rights relating to the */
/* technology embodied in these files. In particular, and without limitation, */
/* these intellectual property rights may include one or more U.S. patents, */
/* foreign patents, or pending applications. */
/* */
/* Sun, Sun Microsystems, the Sun logo, all Sun-based trademarks and logos, */
/* Solaris, Java and all Java-based trademarks and logos are trademarks or */
/* registered trademarks of Sun Microsystems, Inc. in the United States and */
/* other countries. microSPARC is a trademark or registered trademark of */
/* SPARC International, Inc. All SPARC trademarks are used under license and */
/* are trademarks or registered trademarks of SPARC International, Inc. in */
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/* are based upon an architecture developed by Sun Microsystems, Inc. */
/* */
/******************************************************************************/
// @(#)multiplierlsb.v 1.1 4/7/92
//
module MultiplierLSB
(
// inputs
Rom_ResetMul,
notMultip,
notAbortWB,
SumInLSBs, CarryInLSBs,
SCLSBs, SBLSBs, SALSBs,
CCLSB, CBLSB, CALSB,
// outputs
Shift,
Pos,
Zero,
CarryOut0,
CarryOut3,
SumOut0,
SumCarryLoadEn,
InitialMulStep,
/* dhn--01/10/91 notInitialSumZero, */
InitialCarryBit);
input notAbortWB
, Rom_ResetMul
;
input [2:0] SumInLSBs
, CarryInLSBs
;
input [1:0] SCLSBs
, SBLSBs
, SALSBs
;
input CCLSB
, CBLSB
, CALSB
;
input [8:0] notMultip
;
output [3:0] Shift
, Pos
, Zero
;
output CarryOut0
,
CarryOut3
,
SumOut0
;
output InitialCarryBit
,
SumCarryLoadEn
,
InitialMulStep
;
/* dhn--01/10/91 notInitialSumZero; */
/* *************************************************
Multipler Selection Decoding
************************************************* */
MulSelCtl m13 (notMultip[8:6], Shift[3], Pos[3], Zero[3], CarryOut3);
MulSelCtl m12 (notMultip[6:4], Shift[2], Pos[2], Zero[2], CCIn
);
MulSelCtl m11 (notMultip[4:2], Shift[1], Pos[1], Zero[1], CBIn
);
MulSelCtl m10 (notMultip[2:0], Shift[0], Pos[0], Zero[0], CAIn
);
/* *************************************************
Full Add over LSBs and OR result
************************************************* */
MulLSBlog lbg (SumInLSBs[2:1], CarryInLSBs[2:1],
{SCLSBs, SBLSBs, SALSBs},
{CCLSB, CCIn, CBLSB, CBIn, CALSB, CAIn},
//ArraySStk,
//ArrayCStk,
CarryInLSBs[0], SumInLSBs[0],
CarryOut0, SumOut0);
carrysaveregslsb csrl (Rom_ResetMul,
notMultip[0],
notAbortWB,
SumCarryLoadEn,
InitialMulStep,
/* dhn--01/10/91 notInitialSumZero, */
InitialCarryBit);
endmodule
This page: |
Created: | Thu Aug 19 11:56:50 1999 |
| From: |
../../../sparc_v8/ssparc/fpu/fp_ctl/rtl/multiplierlsb.v
|