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/*
* $Id: sig_std_logic.c,v 1.8 2009-05-21 16:38:09 vrsieh Exp $
*
* Copyright (C) 2007-2009 FAUmachine Team <info@faumachine.org>.
* This program is free software. You can redistribute it and/or modify it
* under the terms of the GNU General Public License, either version 2 of
* the License, or (at your option) any later version. See COPYING.
*/
#include "config.h"
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include "fixme.h"
#include "sig_std_logic.h"
static unsigned int
sig_std_logic_resolve(unsigned int val0, unsigned int val1)
{
switch (val0) {
case SIG_STD_LOGIC_U: return SIG_STD_LOGIC_U;
case SIG_STD_LOGIC_X:
switch (val1) {
case SIG_STD_LOGIC_U: return SIG_STD_LOGIC_U;
case SIG_STD_LOGIC_X: return SIG_STD_LOGIC_X;
case SIG_STD_LOGIC_0: return SIG_STD_LOGIC_X;
case SIG_STD_LOGIC_1: return SIG_STD_LOGIC_X;
case SIG_STD_LOGIC_W: return SIG_STD_LOGIC_X;
case SIG_STD_LOGIC_L: return SIG_STD_LOGIC_X;
case SIG_STD_LOGIC_H: return SIG_STD_LOGIC_X;
case SIG_STD_LOGIC_Z: return SIG_STD_LOGIC_X;
default: assert(0);
}
case SIG_STD_LOGIC_0:
switch (val1) {
case SIG_STD_LOGIC_U: return SIG_STD_LOGIC_U;
case SIG_STD_LOGIC_X: return SIG_STD_LOGIC_X;
case SIG_STD_LOGIC_0: return SIG_STD_LOGIC_0;
case SIG_STD_LOGIC_1: return SIG_STD_LOGIC_X;
case SIG_STD_LOGIC_W: return SIG_STD_LOGIC_0;
case SIG_STD_LOGIC_L: return SIG_STD_LOGIC_0;
case SIG_STD_LOGIC_H: return SIG_STD_LOGIC_0;
case SIG_STD_LOGIC_Z: return SIG_STD_LOGIC_0;
default: assert(0);
}
case SIG_STD_LOGIC_1:
switch (val1) {
case SIG_STD_LOGIC_U: return SIG_STD_LOGIC_U;
case SIG_STD_LOGIC_X: return SIG_STD_LOGIC_X;
case SIG_STD_LOGIC_0: return SIG_STD_LOGIC_X;
case SIG_STD_LOGIC_1: return SIG_STD_LOGIC_1;
case SIG_STD_LOGIC_W: return SIG_STD_LOGIC_1;
case SIG_STD_LOGIC_L: return SIG_STD_LOGIC_1;
case SIG_STD_LOGIC_H: return SIG_STD_LOGIC_1;
case SIG_STD_LOGIC_Z: return SIG_STD_LOGIC_1;
default: assert(0);
}
case SIG_STD_LOGIC_W:
switch (val1) {
case SIG_STD_LOGIC_U: return SIG_STD_LOGIC_U;
case SIG_STD_LOGIC_X: return SIG_STD_LOGIC_X;
case SIG_STD_LOGIC_0: return SIG_STD_LOGIC_0;
case SIG_STD_LOGIC_1: return SIG_STD_LOGIC_1;
case SIG_STD_LOGIC_W: return SIG_STD_LOGIC_W;
case SIG_STD_LOGIC_L: return SIG_STD_LOGIC_W;
case SIG_STD_LOGIC_H: return SIG_STD_LOGIC_W;
case SIG_STD_LOGIC_Z: return SIG_STD_LOGIC_W;
default: assert(0);
}
case SIG_STD_LOGIC_L:
switch (val1) {
case SIG_STD_LOGIC_U: return SIG_STD_LOGIC_U;
case SIG_STD_LOGIC_X: return SIG_STD_LOGIC_X;
case SIG_STD_LOGIC_0: return SIG_STD_LOGIC_0;
case SIG_STD_LOGIC_1: return SIG_STD_LOGIC_1;
case SIG_STD_LOGIC_W: return SIG_STD_LOGIC_W;
case SIG_STD_LOGIC_L: return SIG_STD_LOGIC_L;
case SIG_STD_LOGIC_H: return SIG_STD_LOGIC_W;
case SIG_STD_LOGIC_Z: return SIG_STD_LOGIC_L;
default: assert(0);
}
case SIG_STD_LOGIC_H:
switch (val1) {
case SIG_STD_LOGIC_U: return SIG_STD_LOGIC_U;
case SIG_STD_LOGIC_X: return SIG_STD_LOGIC_X;
case SIG_STD_LOGIC_0: return SIG_STD_LOGIC_0;
case SIG_STD_LOGIC_1: return SIG_STD_LOGIC_1;
case SIG_STD_LOGIC_W: return SIG_STD_LOGIC_W;
case SIG_STD_LOGIC_L: return SIG_STD_LOGIC_W;
case SIG_STD_LOGIC_H: return SIG_STD_LOGIC_H;
case SIG_STD_LOGIC_Z: return SIG_STD_LOGIC_H;
default: assert(0);
}
case SIG_STD_LOGIC_Z:
switch (val1) {
case SIG_STD_LOGIC_U: return SIG_STD_LOGIC_U;
case SIG_STD_LOGIC_X: return SIG_STD_LOGIC_X;
case SIG_STD_LOGIC_0: return SIG_STD_LOGIC_0;
case SIG_STD_LOGIC_1: return SIG_STD_LOGIC_1;
case SIG_STD_LOGIC_W: return SIG_STD_LOGIC_W;
case SIG_STD_LOGIC_L: return SIG_STD_LOGIC_L;
case SIG_STD_LOGIC_H: return SIG_STD_LOGIC_H;
case SIG_STD_LOGIC_Z: return SIG_STD_LOGIC_Z;
default: assert(0);
}
default: assert(0);
}
}
static void
sig_std_logic_flush(struct sig_std_logic *b)
{
unsigned int i;
unsigned int nr;
for (i = 0; i < b->in_count; i++) {
void (*func)(void *, unsigned int);
unsigned int new_val;
new_val = SIG_STD_LOGIC_Z;
for (nr = 0; nr < b->out_count; nr++) {
if (b->out[nr].s == b->in[i].s) continue;
new_val = sig_std_logic_resolve(new_val, b->out[nr].out);
}
func = b->in[i].f->set_ext;
if (func
&& b->in[i].in != new_val) {
b->in[i].in = new_val;
func(b->in[i].s, new_val);
}
for (nr = 0; nr < b->out_count; nr++) {
if (b->out[nr].s != b->in[i].s) continue;
new_val = sig_std_logic_resolve(new_val, b->out[nr].out);
}
func = b->in[i].f->set;
if (func
&& b->in[i].in != new_val) {
b->in[i].in = new_val;
func(b->in[i].s, new_val);
}
}
}
void
sig_std_logic_set(struct sig_std_logic *b, void *s, unsigned int val)
{
unsigned int nr;
for (nr = 0; ; nr++) {
if (nr == b->out_count) {
assert(0);
break;
}
if (b->out[nr].s == s) {
b->out[nr].out = val;
break;
}
}
sig_std_logic_flush(b);
}
void
sig_std_logic_connect_in(
struct sig_std_logic *b,
void *s,
const struct sig_std_logic_funcs *f
)
{
assert(b);
assert(b->type == SIG_GEN_STD_LOGIC);
assert(b->in_count < sizeof(b->in) / sizeof(b->in[0]));
// assert(s);
assert(f);
assert(f->set || f->set_ext);
assert(! f->set || ! f->set_ext);
b->in[b->in_count].s = s;
b->in[b->in_count].f = f;
b->in[b->in_count].in = SIG_STD_LOGIC_U;
b->in_count++;
sig_std_logic_flush(b);
}
void
sig_std_logic_connect_out(
struct sig_std_logic *b,
void *s,
unsigned int val
)
{
assert(b);
assert(b->type == SIG_GEN_STD_LOGIC);
assert(b->out_count < sizeof(b->out) / sizeof(b->out[0]));
// assert(s);
assert(val == SIG_STD_LOGIC_U
|| val == SIG_STD_LOGIC_X
|| val == SIG_STD_LOGIC_0
|| val == SIG_STD_LOGIC_1
|| val == SIG_STD_LOGIC_W
|| val == SIG_STD_LOGIC_L
|| val == SIG_STD_LOGIC_H
|| val == SIG_STD_LOGIC_Z);
b->out[b->out_count].s = s;
b->out[b->out_count].out = val;
b->out_count++;
sig_std_logic_flush(b);
}
static void
sig_std_logic_s0_set(void *_f, unsigned int val)
{
struct sig_std_logic_merge *f = (struct sig_std_logic_merge *) _f;
sig_std_logic_set(f->s1, f, val);
}
static void
sig_std_logic_s1_set(void *_f, unsigned int val)
{
struct sig_std_logic_merge *f = (struct sig_std_logic_merge *) _f;
sig_std_logic_set(f->s0, f, val);
}
struct sig_std_logic_merge *
sig_std_logic_merge(struct sig_std_logic *s0, struct sig_std_logic *s1)
{
static struct sig_std_logic_funcs s0_funcs = {
.set_ext = sig_std_logic_s0_set,
};
static struct sig_std_logic_funcs s1_funcs = {
.set_ext = sig_std_logic_s1_set,
};
struct sig_std_logic_merge *m;
m = malloc(sizeof(*m));
assert(m);
/* Out */
m->s0 = s0;
sig_std_logic_connect_out(s0, m, SIG_STD_LOGIC_Z);
m->s1 = s1;
sig_std_logic_connect_out(s1, m, SIG_STD_LOGIC_Z);
/* In */
sig_std_logic_connect_in(s0, m, &s0_funcs);
sig_std_logic_connect_in(s1, m, &s1_funcs);
return m;
}
void
sig_std_logic_split(struct sig_std_logic_merge *m)
{
fixme();
}
struct sig_std_logic *
sig_std_logic_create(const char *name)
{
struct sig_std_logic *b;
b = malloc(sizeof(*b));
assert(b);
b->type = SIG_GEN_STD_LOGIC;
b->out_count = 0;
b->in_count = 0;
return b;
}
void
sig_std_logic_destroy(struct sig_std_logic *sig)
{
assert(sig);
assert(sig->type == SIG_GEN_STD_LOGIC);
free(sig);
}
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