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iverilog/t-dll.h

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#ifndef __t_dll_H
#define __t_dll_H
/*
* Copyright (c) 2000-2011 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
*/
# include "target.h"
# include "ivl_target.h"
# include "ivl_target_priv.h"
# include "StringHeap.h"
# include "netlist.h"
# include <vector>
# include <map>
#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
/*
* 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 {
// This is a special function for loading and testing the
// version of a loadable target code generator.
void test_version(const char*target_name);
bool start_design(const Design*);
int end_design(const Design*);
bool bufz(const NetBUFZ*);
bool branch(const NetBranch*);
bool enumeration(const NetScope*, netenum_t*);
void event(const NetEvent*);
void logic(const NetLogic*);
bool tran(const NetTran*);
bool ureduce(const NetUReduce*);
void net_case_cmp(const NetCaseCmp*);
void udp(const NetUDP*);
void lpm_abs(const NetAbs*);
void lpm_add_sub(const NetAddSub*);
bool lpm_array_dq(const NetArrayDq*);
bool lpm_cast_int2(const NetCastInt2*);
bool lpm_cast_int4(const NetCastInt4*);
bool lpm_cast_real(const NetCastReal*);
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_pow(const NetPow*);
bool concat(const NetConcat*);
bool part_select(const NetPartSelect*);
bool replicate(const NetReplicate*);
void net_assign(const NetAssign_*) const;
bool net_sysfunction(const NetSysFunc*);
bool net_function(const NetUserFunc*);
bool net_const(const NetConst*);
bool net_literal(const NetLiteral*);
void net_probe(const NetEvProbe*);
bool sign_extend(const NetSignExtend*);
bool process(const NetProcTop*);
bool process(const NetAnalogTop*);
void scope(const NetScope*);
void signal(const NetNet*);
bool signal_paths(const NetNet*);
ivl_dll_t dll_;
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_alloc(const NetAlloc*);
bool 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_contribution(const NetContribution*);
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*);
void proc_free(const NetFree*);
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*);
bool func_def(const NetScope*);
void task_def(const NetScope*);
struct ivl_expr_s*expr_;
void expr_access_func(const NetEAccess*);
void expr_binary(const NetEBinary*);
void expr_concat(const NetEConcat*);
void expr_const(const NetEConst*);
void expr_creal(const NetECReal*);
void expr_param(const NetEConstParam*);
void expr_rparam(const NetECRealParam*);
void expr_event(const NetEEvent*);
void expr_scope(const NetEScope*);
void expr_netenum(const NetENetenum*);
void expr_select(const NetESelect*);
void expr_sfunc(const NetESFunc*);
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 switch_attributes(struct ivl_switch_s *obj, const NetNode*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_parameter_t scope_find_param(ivl_scope_t scope,
const char*name);
void add_root(ivl_design_s &des_, const NetScope *s);
void make_assign_lvals_(const NetAssignBase*net);
void sub_off_from_expr_(long);
void mul_expr_by_const_(long);
void make_delays_(ivl_expr_t*delay, const NetObj*net);
void make_logic_delays_(struct ivl_net_logic_s*obj, const NetObj*net);
void make_switch_delays_(struct ivl_switch_s*obj, const NetObj*net);
void make_lpm_delays_(struct ivl_lpm_s*obj, const NetObj*net);
void make_const_delays_(struct ivl_net_const_s*obj, const NetObj*net);
void make_scope_parameters(ivl_scope_t scope, const NetScope*net);
void make_scope_param_expr(ivl_parameter_t cur_par, NetExpr*etmp);
ivl_event_t make_lpm_trigger(const NetEvWait*ev);
bool lpm_arith1_(ivl_lpm_type_t lpm_type, unsigned wid, bool signed_flag, const NetNode*net);
static ivl_expr_t expr_from_value_(const verinum&that);
};
extern struct dll_target dll_target_obj;
/*
* These are various private declarations used by the t-dll target.
*/
struct ivl_delaypath_s {
ivl_scope_t scope;
ivl_nexus_t src;
ivl_nexus_t condit;
bool conditional;
bool posedge;
bool negedge;
uint64_t delay[12];
};
struct ivl_event_s {
perm_string name;
ivl_scope_t scope;
perm_string file;
unsigned lineno;
unsigned 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_;
ivl_variable_type_t value_;
perm_string file;
unsigned lineno;
unsigned width_;
unsigned signed_ : 1;
unsigned sized_ : 1;
union {
struct {
char op_;
ivl_expr_t lef_;
ivl_expr_t rig_;
} binary_;
struct {
ivl_select_type_t sel_type_;
ivl_expr_t expr_;
ivl_expr_t base_;
} select_;
struct {
ivl_branch_t branch;
ivl_nature_t nature;
} branch_;
struct {
unsigned rept;
unsigned parms;
ivl_expr_t*parm;
} concat_;
struct {
char*bits_;
ivl_parameter_t parameter;
} number_;
struct {
ivl_event_t event;
} event_;
struct {
ivl_scope_t scope;
} scope_;
struct {
ivl_enumtype_t type;
} enumtype_;
struct {
ivl_signal_t sig;
ivl_expr_t word;
} signal_;
struct {
const char *name_;
ivl_expr_t *parm;
unsigned parms;
} sfunc_;
struct {
char*value_;
ivl_parameter_t parameter;
} 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 parms;
} ufunc_;
struct {
unsigned long value;
} ulong_;
struct {
double value;
ivl_parameter_t parameter;
} real_;
struct {
char op_;
ivl_expr_t sub_;
} unary_;
struct {
uint64_t value;
} delay_;
} 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;
perm_string name;
perm_string file;
unsigned lineno;
// Value returned by ivl_lpm_width;
unsigned width;
ivl_expr_t delay[3];
union {
struct ivl_lpm_ff_s {
ivl_nexus_t clk;
ivl_nexus_t we;
ivl_nexus_t aclr;
ivl_nexus_t aset;
ivl_nexus_t sclr;
ivl_nexus_t sset;
union {
ivl_nexus_t*pins;
ivl_nexus_t pin;
} q;
union {
ivl_nexus_t*pins;
ivl_nexus_t pin;
} d;
ivl_expr_t aset_value;
ivl_expr_t sset_value;
} ff;
struct ivl_lpm_mux_s {
unsigned size;
unsigned swid;
ivl_nexus_t*d;
ivl_nexus_t q, s;
} mux;
struct ivl_lpm_shift_s {
unsigned select;
unsigned signed_flag :1;
ivl_nexus_t q, d, s;
} shift;
struct ivl_lpm_arith_s {
unsigned signed_flag :1;
ivl_nexus_t q, a, b;
} arith;
struct ivl_lpm_array_s {
ivl_signal_t sig;
unsigned swid;
ivl_nexus_t q, a;
} array;
struct ivl_concat_s {
unsigned inputs;
ivl_nexus_t*pins;
} concat;
struct ivl_part_s {
unsigned base;
unsigned signed_flag :1;
ivl_nexus_t q, a, s;
} part;
// IVL_LPM_RE_* and IVL_LPM_SIGN_EXT use this.
struct ivl_lpm_reduce_s {
ivl_nexus_t q, a;
} reduce;
struct ivl_lpm_repeat_s {
unsigned count;
ivl_nexus_t q, a;
} repeat;
struct ivl_lpm_sfunc_s {
const char* fun_name;
unsigned ports;
ivl_nexus_t*pins;
ivl_event_t trigger;
} sfunc;
struct ivl_lpm_ufunc_s {
ivl_scope_t def;
unsigned ports;
ivl_nexus_t*pins;
ivl_event_t trigger;
} 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, / Deprecated in favor of LVAL_ARR? */
IVL_LVAL_NET = 3, /* Only force can have NET l-values */
IVL_LVAL_ARR = 4
};
struct ivl_lval_s {
ivl_expr_t loff;
ivl_select_type_t sel_type;
ivl_expr_t idx;
unsigned width_;
unsigned type_ : 8;
union {
ivl_signal_t sig;
ivl_memory_t mem;
} n;
};
/*
* This object represents a literal constant, possibly signed, in a
* structural context.
*/
struct ivl_net_const_s {
ivl_variable_type_t type : 3;
unsigned width_ : 24;
unsigned signed_ : 1;
perm_string file;
unsigned lineno;
ivl_scope_t scope;
union {
double real_value;
char bit_[sizeof(char*)];
const char* bits_;
} b;
ivl_nexus_t pin_;
ivl_expr_t delay[3];
void* operator new (size_t s);
void operator delete(void*obj, size_t s); // Not implemented
};
/*
* 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_;
unsigned width_;
ivl_udp_t udp;
perm_string name_;
ivl_scope_t scope_;
perm_string file;
unsigned lineno;
unsigned npins_;
ivl_nexus_t*pins_;
struct ivl_attribute_s*attr;
unsigned nattr;
ivl_expr_t delay[3];
};
struct ivl_switch_s {
ivl_switch_type_t type;
unsigned width;
unsigned part;
unsigned offset;
perm_string name;
ivl_scope_t scope;
ivl_island_t island;
struct ivl_attribute_s*attr;
unsigned nattr;
ivl_expr_t delay[3];
ivl_nexus_t pins[3];
perm_string file;
unsigned lineno;
};
/*
* UDP definition.
*/
struct ivl_udp_s {
perm_string name;
unsigned nin;
int sequ; /* boolean */
char init;
unsigned nrows;
typedef const char*ccharp_t;
ccharp_t*table; // zero terminated array of pointers
perm_string file;
unsigned lineno;
string*ports;
};
/*
* 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_;
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 */
ivl_switch_t swi; /* type 4 */
ivl_branch_t bra; /* type 5 */
} l;
};
# define __NEXUS_PTR_SIG 0
# define __NEXUS_PTR_LOG 1
# define __NEXUS_PTR_CON 2
# define __NEXUS_PTR_LPM 3
# define __NEXUS_PTR_SWI 4
# define __NEXUS_PTR_BRA 5
/*
* NOTE: ONLY allocate ivl_nexus_s objects with the included "new" operator.
*/
struct ivl_nexus_s {
ivl_nexus_s() : ptrs_(1), nexus_(0), name_(0), private_data(0) { }
vector<ivl_nexus_ptr_s>ptrs_;
const Nexus*nexus_;
const char*name_;
void*private_data;
void* operator new (size_t s);
void operator delete(void*obj, size_t s); // Not implemented
};
/*
* This is the implementation of a parameter. Each scope has a list of
* these.
*/
struct ivl_parameter_s {
perm_string basename;
ivl_scope_t scope;
ivl_expr_t value;
perm_string file;
unsigned lineno;
};
/*
* All we know about a process is 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_ : 2;
int analog_flag : 1;
ivl_scope_t scope_;
ivl_statement_t stmt_;
perm_string file;
unsigned lineno;
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 parent;
std::map<hname_t,ivl_scope_t> children;
perm_string name_;
perm_string tname_;
perm_string file;
perm_string def_file;
unsigned lineno;
unsigned def_lineno;
ivl_scope_type_t type_;
std::vector<ivl_enumtype_t> enumerations_;
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 nparam_;
ivl_parameter_t param_;
/* Scopes that are tasks/functions have a definition. */
ivl_statement_t def;
unsigned is_auto;
unsigned is_cell;
unsigned ports;
ivl_signal_t*port;
std::vector<ivl_switch_t>switches;
signed int time_precision :8;
signed int time_units :8;
struct ivl_attribute_s*attr;
unsigned nattr;
};
/*
* 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_;
ivl_variable_type_t data_type;
ivl_discipline_t discipline;
perm_string file;
unsigned lineno;
unsigned width_;
unsigned signed_ : 1;
unsigned isint_ : 1;
unsigned local_ : 1;
/* For now, support only 0 or 1 array dimensions. */
unsigned array_dimensions_ : 1;
unsigned array_addr_swapped : 1;
/* These encode the run-time index for the least significant
bit, and the distance to the second bit. */
signed lsb_index;
signed lsb_dist;
perm_string name_;
ivl_scope_t scope_;
unsigned array_words;
int array_base;
union {
ivl_nexus_t pin;
ivl_nexus_t*pins;
};
ivl_delaypath_s*path;
unsigned npath;
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_;
perm_string file;
unsigned lineno;
union {
struct { /* IVL_ST_ALLOC */
ivl_scope_t scope;
} alloc_;
struct { /* IVL_ST_ASSIGN IVL_ST_ASSIGN_NB
IVL_ST_CASSIGN, IVL_ST_DEASSIGN */
unsigned lvals_;
struct ivl_lval_s*lval_;
ivl_expr_t rval_;
ivl_expr_t delay;
// The following are only for NB event control.
ivl_expr_t count;
unsigned nevent;
union {
ivl_event_t event;
ivl_event_t*events;
};
} 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_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_CONTRIB */
ivl_expr_t lval;
ivl_expr_t rval;
} contrib_;
struct { /* IVL_ST_DELAY */
uint64_t value;
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_FREE */
ivl_scope_t scope;
} free_;
struct { /* IVL_ST_STASK */
const char*name_;
ivl_sfunc_as_task_t sfunc_as_task_;
unsigned nparm_;
ivl_expr_t*parms_;
} stask_;
struct { /* IVL_ST_UTASK */
ivl_scope_t def;
} utask_;
struct { /* IVL_ST_TRIGGER IVL_ST_WAIT */
unsigned nevent;
union {
ivl_event_t event;
ivl_event_t*events;
};
ivl_statement_t stmt_;
} wait_;
struct { /* IVL_ST_WHILE IVL_ST_REPEAT */
ivl_expr_t cond_;
ivl_statement_t stmt_;
} while_;
} u_;
};
/*
* The FILE_NAME function is a shorthand for attaching file/line
* information to the statement object.
*/
static inline void FILE_NAME(ivl_expr_t expr, const LineInfo*info)
{
expr->file = info->get_file();
expr->lineno = info->get_lineno();
}
static inline void FILE_NAME(ivl_event_t event, const LineInfo*info)
{
event->file = info->get_file();
event->lineno = info->get_lineno();
}
static inline void FILE_NAME(ivl_lpm_t lpm, const LineInfo*info)
{
lpm->file = info->get_file();
lpm->lineno = info->get_lineno();
}
static inline void FILE_NAME(ivl_net_const_t net, const LineInfo*info)
{
net->file = info->get_file();
net->lineno = info->get_lineno();
}
static inline void FILE_NAME(ivl_net_logic_t net, const LineInfo*info)
{
net->file = info->get_file();
net->lineno = info->get_lineno();
}
static inline void FILE_NAME(ivl_parameter_t net, const LineInfo*info)
{
net->file = info->get_file();
net->lineno = info->get_lineno();
}
static inline void FILE_NAME(ivl_process_t net, const LineInfo*info)
{
net->file = info->get_file();
net->lineno = info->get_lineno();
}
static inline void FILE_NAME(ivl_scope_t scope, const NetScope*info)
{
scope->file = info->get_file();
scope->def_file = info->get_def_file();
scope->lineno = info->get_lineno();
scope->def_lineno = info->get_def_lineno();
}
static inline void FILE_NAME(ivl_statement_t stmt, const LineInfo*info)
{
stmt->file = info->get_file();
stmt->lineno = info->get_lineno();
}
static inline void FILE_NAME(ivl_switch_t net, const LineInfo*info)
{
net->file = info->get_file();
net->lineno = info->get_lineno();
}
static inline void FILE_NAME(ivl_signal_t net, const LineInfo*info)
{
net->file = info->get_file();
net->lineno = info->get_lineno();
}
#endif
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