Add $push flag for threads.
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steve
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@ -1,7 +1,7 @@
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/*
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* Copyright (c) 2001 Stephen Williams (steve@icarus.com)
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*
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* $Id: README.txt,v 1.44 2003/04/11 05:15:38 steve Exp $
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* $Id: README.txt,v 1.45 2003/09/04 20:26:30 steve Exp $
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*/
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VVP SIMULATION ENGINE
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@ -537,13 +537,22 @@ Thread statements create the initial threads for a simulation. These
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represent the initial and always blocks, and possibly other causes to
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create threads at startup.
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.thread <symbol>
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.thread <symbol> [, <flag>]
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This statement creates a thread with a starting address at the
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instruction given by <symbol>.
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instruction given by <symbol>. When the simulation starts, a thread is
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created for the .thread statement, and it starts at the <symbol>
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addressed instruction.
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The <flag> modifies the creation/execution behavior of the
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thread. Supported flags are:
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THREADS IN GENERAL:
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$push -- Cause the thread to be pushed in the scheduler. This
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only effects startup (time 0) by arranging for pushed
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threads to be started before non-pushed threads. This
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is useful for resolving time-0 races.
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* Threads in general
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Thread statements create the initial threads of a design. These
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include the ``initial'' and ``always'' statements of the original
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@ -575,7 +584,7 @@ parent, and %end in the child. Without this proper matching, the
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hierarchical relationships can get confused. The behavior of erroneous
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code is undefined.
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THREADS AND SCOPES:
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* Threads and scopes
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The Verilog ``disable'' statement deserves some special mention
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because of how it interacts with threads. In particular, threads
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@ -17,7 +17,7 @@
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CVS_IDENT
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#ident "$Id: compile.cc,v 1.169 2003/07/30 01:13:28 steve Exp $"
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#ident "$Id: compile.cc,v 1.170 2003/09/04 20:26:31 steve Exp $"
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#endif
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# include "arith.h"
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@ -1456,8 +1456,10 @@ void compile_vpi_func_call(char*label, char*name,
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* with the start address referenced by the program symbol passed to
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* me.
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*/
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void compile_thread(char*start_sym)
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void compile_thread(char*start_sym, char*flag)
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{
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bool push_flag = false;
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symbol_value_t tmp = sym_get_value(sym_codespace, start_sym);
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vvp_code_t pc = reinterpret_cast<vvp_code_t>(tmp.ptr);
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if (pc == 0) {
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@ -1465,9 +1467,15 @@ void compile_thread(char*start_sym)
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return;
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}
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if (flag && (strcmp(flag,"$push") == 0))
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push_flag = true;
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vthread_t thr = vthread_new(pc, vpip_peek_current_scope());
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schedule_vthread(thr, 0);
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schedule_vthread(thr, 0, push_flag);
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free(start_sym);
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if (flag != 0)
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free(flag);
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}
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/*
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@ -1539,6 +1547,9 @@ void compile_param_string(char*label, char*name, char*str, char*value)
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/*
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* $Log: compile.cc,v $
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* Revision 1.170 2003/09/04 20:26:31 steve
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* Add $push flag for threads.
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*
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* Revision 1.169 2003/07/30 01:13:28 steve
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* Add support for triand and trior.
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*
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@ -19,7 +19,7 @@
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CVS_IDENT
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#ident "$Id: compile.h,v 1.52 2003/05/29 02:21:45 steve Exp $"
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#ident "$Id: compile.h,v 1.53 2003/09/04 20:26:31 steve Exp $"
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#endif
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# include <stdio.h>
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@ -250,7 +250,7 @@ extern void compile_scope_recall(char*sym);
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* The parser uses this function to declare a thread. The start_sym is
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* the start instruction, and must already be defined.
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*/
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extern void compile_thread(char*start_sym);
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extern void compile_thread(char*start_sym, char*flag);
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/*
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* This function is called to create a var vector with the given name.
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@ -264,6 +264,9 @@ extern void compile_net(char*label, char*name,
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/*
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* $Log: compile.h,v $
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* Revision 1.53 2003/09/04 20:26:31 steve
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* Add $push flag for threads.
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*
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* Revision 1.52 2003/05/29 02:21:45 steve
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* Implement acc_fetch_defname and its infrastructure in vvp.
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*
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13
vvp/parse.y
13
vvp/parse.y
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@ -19,7 +19,7 @@
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CVS_IDENT
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#ident "$Id: parse.y,v 1.55 2003/08/22 23:14:27 steve Exp $"
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#ident "$Id: parse.y,v 1.56 2003/09/04 20:26:31 steve Exp $"
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#endif
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# include "parse_misc.h"
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@ -345,10 +345,14 @@ statement
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{ compile_timescale(-$3); }
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/* Thread statements declare a thread with its starting address. The
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starting address must already be defined. */
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starting address must already be defined. The .thread statement
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may also take an optional flag word. */
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| K_THREAD T_SYMBOL ';'
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{ compile_thread($2); }
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{ compile_thread($2, 0); }
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| K_THREAD T_SYMBOL ',' T_SYMBOL ';'
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{ compile_thread($2, $4); }
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/* Var statements declare a bit of a variable. This also implicitly
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creates a functor with the same name that acts as the output of
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@ -613,6 +617,9 @@ int compile_design(const char*path)
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/*
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* $Log: parse.y,v $
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* Revision 1.56 2003/09/04 20:26:31 steve
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* Add $push flag for threads.
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*
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* Revision 1.55 2003/08/22 23:14:27 steve
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* Preserve variable ranges all the way to the vpi.
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*
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