Synthesize shift expressions.
This commit is contained in:
steve
parent
aad7816949
commit
2c129dfbfa
173
expr_synth.cc
173
expr_synth.cc
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@ -17,7 +17,7 @@
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CVS_IDENT
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#ident "$Id: expr_synth.cc,v 1.41 2003/03/06 00:28:41 steve Exp $"
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#ident "$Id: expr_synth.cc,v 1.42 2003/04/08 04:33:55 steve Exp $"
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#endif
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# include "config.h"
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@ -398,6 +398,48 @@ NetNet* NetEBLogic::synthesize(Design*des)
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return osig;
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}
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NetNet* NetEBShift::synthesize(Design*des)
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{
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NetNet*lsig = left_->synthesize(des);
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NetNet*rsig = right_->synthesize(des);
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if (lsig == 0)
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return 0;
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if (rsig == 0)
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return 0;
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NetScope*scope = lsig->scope();
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NetNet*osig = new NetNet(scope, scope->local_symbol(),
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NetNet::IMPLICIT, expr_width());
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assert(op() == 'l');
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NetCLShift*dev = new NetCLShift(scope, scope->local_symbol(),
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osig->pin_count(),
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rsig->pin_count());
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des->add_node(dev);
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for (unsigned idx = 0 ; idx < dev->width() ; idx += 1)
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connect(dev->pin_Result(idx), osig->pin(idx));
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assert(lsig->pin_count() >= dev->width());
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for (unsigned idx = 0 ; idx < dev->width() ; idx += 1)
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connect(dev->pin_Data(idx), lsig->pin(idx));
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for (unsigned idx = 0 ; idx < dev->width_dist() ; idx += 1)
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connect(dev->pin_Distance(idx), rsig->pin(idx));
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verinum dir_v = (op() == 'r')? verinum::V1 : verinum::V0;
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NetNet*dir_n = new NetNet(scope, scope->local_symbol(),
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NetNet::WIRE, 1);
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NetConst*dir = new NetConst(scope, scope->local_symbol(), dir_v);
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connect(dev->pin_Direction(), dir->pin(0));
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connect(dev->pin_Direction(), dir_n->pin(0));
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return osig;
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}
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NetNet* NetEConcat::synthesize(Design*des)
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{
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/* First, synthesize the operands. */
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@ -641,6 +683,9 @@ NetNet* NetESignal::synthesize(Design*des)
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/*
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* $Log: expr_synth.cc,v $
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* Revision 1.42 2003/04/08 04:33:55 steve
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* Synthesize shift expressions.
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*
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* Revision 1.41 2003/03/06 00:28:41 steve
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* All NetObj objects have lex_string base names.
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*
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@ -672,131 +717,5 @@ NetNet* NetESignal::synthesize(Design*des)
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*
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* Divide signal reference counts between rval
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* and lval references.
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*
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* Revision 1.32 2002/05/23 03:08:51 steve
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* Add language support for Verilog-2001 attribute
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* syntax. Hook this support into existing $attribute
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* handling, and add number and void value types.
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*
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* Add to the ivl_target API new functions for access
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* of complex attributes attached to gates.
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*
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* Revision 1.31 2001/12/30 17:06:52 steve
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* Synthesize reduction logic.
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*
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* Revision 1.30 2001/12/18 05:34:02 steve
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* Comments about MUX synthesis.
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*
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* Revision 1.29 2001/11/29 01:58:18 steve
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* Handle part selects in l-values of DFF devices.
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*
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* Revision 1.28 2001/10/28 01:14:53 steve
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* NetObj constructor finally requires a scope.
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*
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* Revision 1.27 2001/10/20 05:21:51 steve
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* Scope/module names are char* instead of string.
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*
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* Revision 1.26 2001/08/31 22:59:48 steve
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* synthesize the special case of compare with 0.
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*
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* Revision 1.25 2001/08/05 02:49:07 steve
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* Properly synthesize part selects.
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*
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* Revision 1.24 2001/07/25 03:10:49 steve
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* Create a config.h.in file to hold all the config
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* junk, and support gcc 3.0. (Stephan Boettcher)
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*
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* Revision 1.23 2001/07/07 01:38:45 steve
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* Put synthesized signals in proper scope.
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*
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* Revision 1.22 2001/06/15 04:14:18 steve
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* Generate vvp code for GT and GE comparisons.
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*
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* Revision 1.21 2001/06/07 02:12:43 steve
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* Support structural addition.
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*
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* Revision 1.20 2001/02/15 06:59:36 steve
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* FreeBSD port has a maintainer now.
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*
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* Revision 1.19 2001/01/18 03:16:35 steve
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* NetMux needs a scope. (PR#115)
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*
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* Revision 1.18 2000/11/29 23:16:18 steve
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* Do not delete synthesized signals used in expressions.
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*
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* Revision 1.17 2000/11/29 05:24:00 steve
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* synthesis for unary reduction ! and N operators.
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*
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* Revision 1.16 2000/11/29 02:09:52 steve
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* Add support for || synthesis (PR#53)
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*
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* Revision 1.15 2000/10/07 19:45:43 steve
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* Put logic devices into scopes.
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*
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* Revision 1.14 2000/05/02 00:58:12 steve
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* Move signal tables to the NetScope class.
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*
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* Revision 1.13 2000/04/28 18:43:23 steve
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* integer division in expressions properly get width.
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*
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* Revision 1.12 2000/04/20 00:28:03 steve
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* Catch some simple identity compareoptimizations.
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*
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* Revision 1.11 2000/04/16 23:32:18 steve
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* Synthesis of comparator in expressions.
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*
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* Connect the NetEvent and related classes
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* together better.
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*
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* Revision 1.10 2000/02/23 02:56:54 steve
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* Macintosh compilers do not support ident.
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*
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* Revision 1.9 2000/01/01 06:18:00 steve
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* Handle synthesis of concatenation.
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*
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* Revision 1.8 1999/12/17 06:18:15 steve
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* Rewrite the cprop functor to use the functor_t interface.
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*
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* Revision 1.7 1999/12/17 03:38:46 steve
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* NetConst can now hold wide constants.
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*
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* Revision 1.6 1999/11/28 23:42:02 steve
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* NetESignal object no longer need to be NetNode
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* objects. Let them keep a pointer to NetNet objects.
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*
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* Revision 1.5 1999/11/27 19:07:57 steve
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* Support the creation of scopes.
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*
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* Revision 1.4 1999/11/19 03:00:59 steve
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* Whoops, created a signal with a duplicate name.
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*
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* Revision 1.3 1999/11/05 04:40:40 steve
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* Patch to synthesize LPM_ADD_SUB from expressions,
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* Thanks to Larry Doolittle. Also handle constants
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* in expressions.
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*
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* Synthesize adders in XNF, based on a patch from
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* Larry. Accept synthesis of constants from Larry
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* as is.
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*
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* Revision 1.2 1999/11/04 03:53:26 steve
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* Patch to synthesize unary ~ and the ternary operator.
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* Thanks to Larry Doolittle <LRDoolittle@lbl.gov>.
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*
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* Add the LPM_MUX device, and integrate it with the
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* ternary synthesis from Larry. Replace the lpm_mux
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* generator in t-xnf.cc to use XNF EQU devices to
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* put muxs into function units.
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*
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* Rewrite elaborate_net for the PETernary class to
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* also use the LPM_MUX device.
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*
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* Revision 1.1 1999/11/02 04:55:34 steve
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* Add the synthesize method to NetExpr to handle
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* synthesis of expressions, and use that method
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* to improve r-value handling of LPM_FF synthesis.
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*
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* Modify the XNF target to handle LPM_FF objects.
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*
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*/
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@ -19,7 +19,7 @@
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CVS_IDENT
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#ident "$Id: netlist.h,v 1.283 2003/03/29 05:51:25 steve Exp $"
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#ident "$Id: netlist.h,v 1.284 2003/04/08 04:33:55 steve Exp $"
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#endif
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/*
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@ -2514,6 +2514,8 @@ class NetEBShift : public NetEBinary {
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virtual NetEBShift* dup_expr() const;
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virtual NetEConst* eval_tree();
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virtual NetNet* synthesize(Design*);
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private:
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};
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@ -3244,6 +3246,9 @@ extern ostream& operator << (ostream&, NetNet::Type);
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/*
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* $Log: netlist.h,v $
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* Revision 1.284 2003/04/08 04:33:55 steve
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* Synthesize shift expressions.
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*
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* Revision 1.283 2003/03/29 05:51:25 steve
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* Sign extend NetMult inputs if result is signed.
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*
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