/******************************************************************************/
/* */
/* 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 */
/* the United States and other countries. Products bearing SPARC trademarks */
/* are based upon an architecture developed by Sun Microsystems, Inc. */
/* */
/******************************************************************************/
// @(#)condmux.v 1.1 4/7/92
//
module CondMux
(C,
CS,
notReset,
notAbortNulExc,
DyadicOprExc,
notBrTakenMIS,
notBrTaken);
input [15:0] C
;
input [4:0] CS
;
input notAbortNulExc
,
DyadicOprExc
,
notReset
;
output notBrTakenMIS
;
output notBrTaken
;
ME_TIEOFF toff (vdd
, gnd
);
wire [3:0] T
;
wire [4:0] CoS
;
ME_INVA h_1 (DyadicOprExc, notDyadicOprExc
);
ME_AND3_B h_0 (notAbortNulExc, notReset,
notDyadicOprExc,
notPreventBr
);
ME_AND2_B c_0(CS[0], notPreventBr, CoS[0]);
ME_AND2_B c_1(CS[1], notPreventBr, CoS[1]);
ME_AND2 c_2(CS[2], notPreventBr, CoS[2]);
ME_AND2 c_3(CS[3], notPreventBr, CoS[3]);
ME_AND2 c_4(CS[4], notPreventBr, CoS[4]);
// C[15] takes different route
ME_MUX4B vx_3 (CoS[0], CoS[1], C[12],C[13],C[14],gnd, T[3]);
ME_MUX4B vx_2 (CoS[0], CoS[1], C[8],C[9],C[10],C[11], T[2]);
ME_MUX8B vx_0 (CoS[0], CoS[1], CoS[2], C[0],C[1],C[2],C[3],C[4],C[5],C[6],C[7],C0_7
);
ME_NMUX2B vc_1 (CoS[3], C0_7, T[3], notC0_11
);
ME_XOR2_B vd_0 (notC0_11, CoS[4], notBrTakenNoFrac
);
ME_INVA vc_2 (CoS[2], notCoS2
);
ME_NAND2 vc_3 (notCoS2, CoS[3], notSelFracConds
);
ME_NMUX2B vc_4 (notSelFracConds, T[2], notBrTakenNoFrac,
BrTakenSlowRC
);
// Make a special case of RoundingCondition CoS = {1, 1, 1, 1, 1} ie invert not Rounding condition
ME_AND4 sp_0 (CoS[0], CoS[1], CoS[2], CoS[3], RCSelected
);
ME_AND2 sp_1 (CoS[4], RCSelected, ControlForRCPos
);
ME_NMUX2B_B sp_2 (ControlForRCPos, BrTakenSlowRC, C[15], notBrTaken);
ME_NMUX2B_B sp_3 (ControlForRCPos, BrTakenSlowRC, C[15], notBrTakenMIS);
endmodule
This page: |
Created: | Thu Aug 19 12:00:34 1999 |
| From: |
../../../sparc_v8/ssparc/fpu/fp_ctl/rtl/condmux.v
|