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iverilog/t-dll.h

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#ifndef __t_dll_H
#define __t_dll_H
/*
* Copyright (c) 2000-2002 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
* General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CVS_IDENT
#ident "$Id: t-dll.h,v 1.93 2002/08/12 01:35:01 steve Exp $"
#endif
# include "target.h"
# include "ivl_target.h"
# include "StringHeap.h"
#if defined(__MINGW32__)
#include <windows.h>
typedef void *ivl_dll_t;
#elif defined(HAVE_DLFCN_H)
# include <dlfcn.h>
typedef void* ivl_dll_t;
#elif defined(HAVE_DL_H)
# include <dl.h>
typedef shl_t ivl_dll_t;
#else
# error No DLL stub support for this target.
#endif
struct ivl_design_s {
int time_precision;
ivl_scope_t *roots_;
unsigned nroots_;
ivl_process_t threads_;
ivl_net_const_t*consts;
unsigned nconsts;
const Design*self;
};
/*
* The DLL target type loads a named object file to handle the process
* of scanning the netlist. When it is time to start the design, I
* locate and link in the desired DLL, then start calling methods. The
* DLL will call me back to get information out of the netlist in
* particular.
*/
struct dll_target : public target_t, public expr_scan_t {
bool start_design(const Design*);
int end_design(const Design*);
bool bufz(const NetBUFZ*);
void event(const NetEvent*);
void logic(const NetLogic*);
void net_case_cmp(const NetCaseCmp*);
void udp(const NetUDP*);
void lpm_add_sub(const NetAddSub*);
void lpm_clshift(const NetCLShift*);
void lpm_compare(const NetCompare*);
void lpm_divide(const NetDivide*);
void lpm_ff(const NetFF*);
void lpm_modulo(const NetModulo*);
void lpm_mult(const NetMult*);
void lpm_mux(const NetMux*);
void lpm_ram_dq(const NetRamDq*);
void net_assign(const NetAssign_*);
bool net_cassign(const NetCAssign*);
bool net_force(const NetForce*);
bool net_function(const NetUserFunc*);
bool net_const(const NetConst*);
void net_probe(const NetEvProbe*);
bool process(const NetProcTop*);
void scope(const NetScope*);
void signal(const NetNet*);
void memory(const NetMemory*);
ivl_dll_t dll_;
string dll_path_;
ivl_design_s des_;
target_design_f target_;
/* These methods and members are used for forming the
statements of a thread. */
struct ivl_statement_s*stmt_cur_;
void proc_assign(const NetAssign*);
void proc_assign_nb(const NetAssignNB*);
bool proc_block(const NetBlock*);
void proc_case(const NetCase*);
bool proc_cassign(const NetCAssign*);
bool proc_condit(const NetCondit*);
bool proc_deassign(const NetDeassign*);
bool proc_delay(const NetPDelay*);
bool proc_disable(const NetDisable*);
bool proc_force(const NetForce*);
void proc_forever(const NetForever*);
bool proc_release(const NetRelease*);
void proc_repeat(const NetRepeat*);
void proc_stask(const NetSTask*);
bool proc_trigger(const NetEvTrig*);
void proc_utask(const NetUTask*);
bool proc_wait(const NetEvWait*);
void proc_while(const NetWhile*);
void func_def(const NetScope*);
void task_def(const NetScope*);
struct ivl_expr_s*expr_;
void expr_binary(const NetEBinary*);
void expr_concat(const NetEConcat*);
void expr_memory(const NetEMemory*);
void expr_const(const NetEConst*);
void expr_scope(const NetEScope*);
void expr_select(const NetESelect*);
void expr_sfunc(const NetESFunc*);
void expr_subsignal(const NetEBitSel*);
void expr_ternary(const NetETernary*);
void expr_ufunc(const NetEUFunc*);
void expr_unary(const NetEUnary*);
void expr_signal(const NetESignal*);
ivl_scope_t lookup_scope_(const NetScope*scope);
ivl_attribute_s* fill_in_attributes(const Attrib*net);
void logic_attributes(struct ivl_net_logic_s *obj, const NetNode*net);
private:
StringHeap strings_;
static ivl_scope_t find_scope(ivl_design_s &des, const NetScope*cur);
static ivl_signal_t find_signal(ivl_design_s &des, const NetNet*net);
static ivl_memory_t find_memory(ivl_design_s &des, const NetMemory*net);
void add_root(ivl_design_s &des_, const NetScope *s);
void sub_off_from_expr_(long);
void mul_expr_by_const_(long);
};
/*
* These are various private declarations used by the t-dll target.
*/
struct ivl_event_s {
const char*name;
ivl_scope_t scope;
unsigned short nany, nneg, npos;
ivl_nexus_t*pins;
};
/*
* The ivl_expr_t is an opaque reference to one of these
* structures. This structure holds all the information we need about
* an expression node, including its type, the expression width, and
* type specific properties.
*/
struct ivl_expr_s {
ivl_expr_type_t type_;
unsigned width_ :24;
unsigned signed_ : 1;
union {
struct {
char op_;
ivl_expr_t lef_;
ivl_expr_t rig_;
} binary_;
struct {
ivl_signal_t sig;
ivl_expr_t bit;
} bitsel_;
struct {
unsigned rept :16;
unsigned parms :16;
ivl_expr_t*parm;
} concat_;
struct {
char*bits_;
} number_;
struct {
ivl_scope_t scope;
} scope_;
struct {
ivl_signal_t sig;
unsigned lsi, msi;
} signal_;
struct {
char*name_;
ivl_expr_t *parm;
unsigned short parms;
} sfunc_;
struct {
char*value_;
} string_;
struct {
ivl_expr_t cond;
ivl_expr_t true_e;
ivl_expr_t false_e;
} ternary_;
struct {
ivl_memory_t mem_;
ivl_expr_t idx_;
} memory_;
struct {
ivl_scope_t def;
ivl_expr_t *parm;
unsigned short parms;
} ufunc_;
struct {
unsigned long value;
} ulong_;
struct {
char op_;
ivl_expr_t sub_;
} unary_;
} u_;
};
/*
* LPM devices are handled by this suite of types. The ivl_lpm_s
* structure holds the core, including a type code, the object name
* and scope. The other properties of the device are held in the type
* specific member of the union.
*/
struct ivl_lpm_s {
ivl_lpm_type_t type;
ivl_scope_t scope;
const char* name;
union {
struct ivl_lpm_ff_s {
unsigned short width;
unsigned short swid; // ram only
ivl_nexus_t clk;
ivl_nexus_t we;
union {
ivl_nexus_t*pins;
ivl_nexus_t pin;
} q;
union {
ivl_nexus_t*pins;
ivl_nexus_t pin;
} d;
union { // ram only
ivl_nexus_t*pins;
ivl_nexus_t pin;
} s;
ivl_memory_t mem; // ram only
} ff;
struct ivl_lpm_mux_s {
unsigned short width;
unsigned short size;
unsigned short swid;
ivl_nexus_t*d;
union {
ivl_nexus_t*pins;
ivl_nexus_t pin;
} q;
union {
ivl_nexus_t*pins;
ivl_nexus_t pin;
} s;
} mux;
struct ivl_lpm_shift_s {
unsigned short width;
unsigned short select;
ivl_nexus_t*q;
ivl_nexus_t*d;
ivl_nexus_t*s;
} shift;
struct ivl_lpm_arith_s {
unsigned short width;
ivl_nexus_t*q, *a, *b;
} arith;
struct ivl_lpm_ufunc_s {
ivl_scope_t def;
unsigned short ports;
unsigned short*port_wid;
ivl_nexus_t*pins;
} ufunc;
} u_;
};
/*
* This object represents l-values to assignments. The l-value can be
* a register bit or part select, or a memory word select with a part
* select.
*/
enum ivl_lval_type_t {
IVL_LVAL_REG = 0,
IVL_LVAL_MUX = 1,
IVL_LVAL_MEM = 2,
IVL_LVAL_NET = 3 /* Only force can have NET l-values */
};
struct ivl_lval_s {
unsigned width_ :24;
unsigned loff_ :24;
unsigned type_ : 8;
ivl_expr_t idx;
union {
ivl_signal_t sig;
ivl_memory_t mem;
} n;
};
/*
* This object represents a vector constant, possibly signed, in a
* structural context.
*/
struct ivl_net_const_s {
unsigned width_ :24;
unsigned signed_ : 1;
union {
char bit_[sizeof(char*)];
char *bits_;
} b;
union {
ivl_nexus_t pin_;
ivl_nexus_t*pins_;
} n;
};
/*
* Logic gates (just about everything that has a single output) are
* represented structurally by instances of this object.
*/
struct ivl_net_logic_s {
ivl_logic_t type_;
ivl_udp_t udp;
const char* name_;
ivl_scope_t scope_;
unsigned npins_;
ivl_nexus_t*pins_;
struct ivl_attribute_s*attr;
unsigned nattr;
unsigned delay[3];
};
/*
* UDP definition.
*/
struct ivl_udp_s {
const char* name;
unsigned nin;
unsigned short sequ;
char init;
unsigned nrows;
typedef const char*ccharp_t;
ccharp_t*table; // zero terminated array of pointers
};
/*
* The ivl_nexus_t is a single-bit link of some number of pins of
* devices. the __nexus_ptr structure is a helper that actually does
* the pointing.
*
* The type_ member specifies which of the object pointers in the
* union are valid.
*
* The drive01 members gives the strength of the drive that the device
* is applying to the nexus, with 0 HiZ and 3 supply. If the pin is an
* input to the device, then the drives are both HiZ.
*/
struct ivl_nexus_ptr_s {
unsigned pin_ :24;
unsigned type_ : 8;
unsigned drive0 : 3;
unsigned drive1 : 3;
union {
ivl_signal_t sig; /* type 0 */
ivl_net_logic_t log; /* type 1 */
ivl_net_const_t con; /* type 2 */
ivl_lpm_t lpm; /* type 3 */
} l;
};
# define __NEXUS_PTR_SIG 0
# define __NEXUS_PTR_LOG 1
# define __NEXUS_PTR_CON 2
# define __NEXUS_PTR_LPM 3
struct ivl_nexus_s {
unsigned nptr_;
struct ivl_nexus_ptr_s*ptrs_;
const char*name_;
void*private_data;
};
/*
* Memory.
*/
struct ivl_memory_s {
const char*basename_;
ivl_scope_t scope_;
unsigned width_ :24;
unsigned signed_ : 1;
unsigned size_;
int root_;
};
/*
* All we know about a process it its type (initial or always) and the
* single statement that is it. A process also has a scope, although
* that generally only matters for VPI calls.
*/
struct ivl_process_s {
ivl_process_type_t type_;
ivl_scope_t scope_;
ivl_statement_t stmt_;
struct ivl_attribute_s*attr;
unsigned nattr;
ivl_process_t next_;
};
/*
* Scopes are kept in a tree. Each scope points to its first child,
* and also to any siblings. Thus a parent can scan all its children
* by following its child pointer then following sibling pointers from
* there.
*/
struct ivl_scope_s {
ivl_scope_t child_, sibling_, parent;
const char* name_;
const char* tname_;
ivl_scope_type_t type_;
unsigned nsigs_;
ivl_signal_t*sigs_;
unsigned nlog_;
ivl_net_logic_t*log_;
unsigned nevent_;
ivl_event_t* event_;
unsigned nlpm_;
ivl_lpm_t* lpm_;
unsigned nmem_;
ivl_memory_t* mem_;
/* Scopes that are tasks/functions have a definition. */
ivl_statement_t def;
unsigned ports;
ivl_signal_t*port;
};
/*
* A signal is a thing like a wire, a reg, or whatever. It has a type,
* and if it is a port is also has a direction. Signals are collected
* into scopes (which also point back to me) and have pins that
* connect to the rest of the netlist.
*/
struct ivl_signal_s {
ivl_signal_type_t type_;
ivl_signal_port_t port_;
unsigned width_ :24;
unsigned signed_ : 1;
unsigned isint_ : 1;
unsigned local_ : 1;
/* These encode the run-time index for the least significant
bit, and the distance to the second bit. */
signed lsb_index :24;
signed lsb_dist : 8;
const char*name_;
ivl_scope_t scope_;
union {
ivl_nexus_t pin_;
ivl_nexus_t*pins_;
} n;
struct ivl_attribute_s*attr;
unsigned nattr;
};
/*
* The ivl_statement_t represents any statement. The type of statement
* is defined by the ivl_statement_type_t enumeration. Given the type,
* certain information about the statement may be available.
*/
struct ivl_statement_s {
enum ivl_statement_type_e type_;
union {
struct { /* IVL_ST_ASSIGN IVL_ST_ASSIGN_NB */
unsigned lvals_;
struct ivl_lval_s*lval_;
ivl_expr_t rval_;
ivl_expr_t delay;
} assign_;
struct { /* IVL_ST_BLOCK, IVL_ST_FORK */
struct ivl_statement_s*stmt_;
unsigned nstmt_;
ivl_scope_t scope;
} block_;
struct { /* IVL_ST_CASE, IVL_ST_CASEX, IVL_ST_CASEZ */
ivl_expr_t cond;
unsigned ncase;
ivl_expr_t*case_ex;
struct ivl_statement_s*case_st;
} case_;
struct { /* IVL_ST_CASSIGN, IVL_ST_DEASSIGN */
unsigned lvals;
struct ivl_lval_s*lval;
unsigned npins;
ivl_nexus_t*pins;
} cassign_;
struct { /* IVL_ST_CONDIT */
/* This is the condition expression */
ivl_expr_t cond_;
/* This is two statements, the true and false. */
struct ivl_statement_s*stmt_;
} condit_;
struct { /* IVL_ST_DELAY */
unsigned long delay_;
ivl_statement_t stmt_;
} delay_;
struct { /* IVL_ST_DELAYX */
ivl_expr_t expr; /* XXXX */
ivl_statement_t stmt_;
} delayx_;
struct { /* IVL_ST_DISABLE */
ivl_scope_t scope;
} disable_;
struct { /* IVL_ST_FOREVER */
ivl_statement_t stmt_;
} forever_;
struct { /* IVL_ST_STASK */
char* name_;
unsigned nparm_;
ivl_expr_t*parms_;
} stask_;
struct { /* IVL_ST_TRIGGER */
ivl_event_t event_;
} trig_;
struct { /* IVL_ST_UTASK */
ivl_scope_t def;
} utask_;
struct { /* IVL_ST_WAIT */
ivl_event_t event_;
ivl_statement_t stmt_;
} wait_;
struct { /* IVL_ST_WHILE IVL_ST_REPEAT */
ivl_expr_t cond_;
ivl_statement_t stmt_;
} while_;
} u_;
};
/*
* $Log: t-dll.h,v $
* Revision 1.93 2002/08/12 01:35:01 steve
* conditional ident string using autoconfig.
*
* Revision 1.92 2002/08/07 02:36:10 steve
* Get local StringHeap.h
*
* Revision 1.91 2002/08/07 00:54:39 steve
* Add force to nets.
*
* Revision 1.90 2002/08/05 04:18:45 steve
* Store only the base name of memories.
*
* Revision 1.89 2002/08/04 19:13:16 steve
* dll uses StringHeap for named items.
*
* Revision 1.88 2002/08/04 18:28:15 steve
* Do not use hierarchical names of memories to
* generate vvp labels. -tdll target does not
* used hierarchical name string to look up the
* memory objects in the design.
*
* Revision 1.87 2002/07/05 21:26:17 steve
* Avoid emitting to vvp local net symbols.
*
* Revision 1.86 2002/06/21 04:59:35 steve
* Carry integerness throughout the compilation.
*
* Revision 1.85 2002/06/16 20:39:12 steve
* Normalize run-time index expressions for bit selects
*
* Revision 1.84 2002/06/16 19:19:16 steve
* Generate runtime code to normalize indices.
*
* Revision 1.83 2002/06/05 03:44:25 steve
* Add support for memory words in l-value of
* non-blocking assignments, and remove the special
* NetAssignMem_ and NetAssignMemNB classes.
*
* Revision 1.82 2002/06/04 05:38:44 steve
* Add support for memory words in l-value of
* blocking assignments, and remove the special
* NetAssignMem class.
*
* Revision 1.81 2002/05/29 22:05:55 steve
* Offset lvalue index expressions.
*
* Revision 1.80 2002/05/27 00:08:45 steve
* Support carrying the scope of named begin-end
* blocks down to the code generator, and have
* the vvp code generator use that to support disable.
*
* Revision 1.79 2002/05/26 01:39:03 steve
* Carry Verilog 2001 attributes with processes,
* all the way through to the ivl_target API.
*
* Divide signal reference counts between rval
* and lval references.
*/
#endif
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