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group datastructure cleanup

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This commit is contained in:
Michael Steil 2010-09-24 00:28:59 +00:00
parent bb953d527f
commit 6459887044
1 changed files with 73 additions and 25 deletions
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98
perfect6502.c
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@ -1,4 +1,3 @@
//#define DEBUG
int verbose = 0;
#include <stdio.h>
@ -59,11 +58,6 @@ int cycle;
uint8_t memory[65536]; /* XXX must be hooked up with RAM[] in runtime.c */
/* a group of connected nodes with the same potential */
nodenum_t group[NODES];
count_t groupcount;
int groupbitmap[NODES/sizeof(int)+1];
/* list of nodes that need to be recalculated */
typedef struct {
nodenum_t *list;
@ -95,15 +89,58 @@ get_transistors_on(transnum_t t)
}
BOOL
groupContains(nodenum_t el)
recalcListContains(nodenum_t el)
{
return (recalc.bitmap[el>>5] >> (el & 31)) & 1;
}
/************************************************************
*
* Data Structures and Algorithms for Groups of Nodes
*
************************************************************/
/*
* a group is a set of connected nodes
* that consequently share the same potential
*
* we use an array and a count for O(1) insert and
* iteration, and a redundant bitmap for O(1) lookup
*/
static nodenum_t group[NODES];
static count_t groupcount;
static int groupbitmap[NODES/sizeof(int)+1];
static inline void
group_init()
{
groupcount = 0;
bzero(groupbitmap, sizeof(groupbitmap));
}
static inline void
group_add(nodenum_t i)
{
group[groupcount++] = i;
groupbitmap[i>>5] |= 1 << (i & 31);
}
static inline nodenum_t
group_get(count_t n)
{
return group[n];
}
static inline BOOL
group_contains(nodenum_t el)
{
return (groupbitmap[el>>5] >> (el & 31)) & 1;
}
BOOL
recalcListContains(nodenum_t el)
static inline count_t
group_count()
{
return (recalc.bitmap[el>>5] >> (el & 31)) & 1;
return groupcount;
}
/************************************************************
@ -131,11 +168,10 @@ addNodeTransistor(nodenum_t node, transnum_t t)
void
addNodeToGroup(nodenum_t i)
{
if (groupContains(i))
if (group_contains(i))
return;
group[groupcount++] = i;
groupbitmap[i>>5] |= 1 << (i & 31);
group_add(i);
if (i == vss || i == vcc)
return;
@ -147,22 +183,22 @@ addNodeToGroup(nodenum_t i)
// 1. if there is a pullup node, it's STATE_PU
// 2. if there is a pulldown node, it's STATE_PD
// (if both 1 and 2 are true, the first pullup or pulldown wins, with
// a statistical advantage towards STATE_PU
// a statistical advantage towards STATE_PU)
// 3. otherwise, if there is an FH node, it's STATE_FH
// 4. otherwise, it's STATE_FL (if there is an FL node, which is always the case)
state_t
getNodeValue()
{
if (groupContains(vss))
if (group_contains(vss))
return STATE_GND;
if (groupContains(vcc))
if (group_contains(vcc))
return STATE_VCC;
state_t flstate = STATE_FL;
for (count_t i = 0; i < groupcount; i++) {
nodenum_t nn = group[i];
for (count_t i = 0; i < group_count(); i++) {
nodenum_t nn = group_get(i);
if (nodes_pullup[nn])
return STATE_PU;
if (nodes_pulldown[nn])
@ -234,8 +270,8 @@ recalcNode(nodenum_t node)
if (node == vss || node == vcc)
return;
groupcount = 0;
bzero(groupbitmap, sizeof(groupbitmap));
group_init();
/*
* get all nodes that are connected through
* transistors, starting with this one
@ -252,10 +288,11 @@ recalcNode(nodenum_t node)
* - all nodes behind the transistor are collected
* and must be looked at in the next run
*/
for (count_t i = 0; i < groupcount; i++) {
nodes_state[group[i]] = newv;
for (count_t t = 0; t < nodes_gatecount[group[i]]; t++)
recalcTransistor(nodes_gates[group[i]][t]);
for (count_t i = 0; i < group_count(); i++) {
nodenum_t nn = group_get(i);
nodes_state[nn] = newv;
for (count_t t = 0; t < nodes_gatecount[nn]; t++)
recalcTransistor(nodes_gates[nn][t]);
}
}
@ -671,6 +708,16 @@ step()
if (verbose)
chipStatus();
#if 0
for (int i = 0; i < NODES; i++) {
// if (nodes_pullup[i] && nodes_pulldown[i])
// printf("BOTH %d\n", i);
if (!nodes_pullup[i] && !nodes_pulldown[i])
printf("%d ", i);
}
printf("\n");
#endif
handle_monitor();
}
@ -685,7 +732,8 @@ setupNodesAndTransistors()
{
count_t i;
for (i = 0; i < sizeof(segdefs)/sizeof(*segdefs); i++) {
nodes_pullup[i] = segdefs[i];
nodes_pullup[i] = segdefs[i] == 1;
// nodes_pulldown[i] = !segdefs[i];
nodes_gatecount[i] = 0;
nodes_c1c2count[i] = 0;
}