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nicer getNodeValue() interface, same speed

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This commit is contained in:
Michael Steil 2010-10-05 16:46:27 +00:00
parent 90dfd9791a
commit eee151c3ec
1 changed files with 32 additions and 24 deletions
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56
perfect6502.c
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@ -36,7 +36,7 @@
typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
typedef int BOOL;
typedef unsigned int BOOL;
#define NO 0
#define YES 1
@ -68,7 +68,6 @@ typedef int BOOL;
typedef uint16_t nodenum_t;
typedef uint16_t transnum_t;
typedef uint16_t count_t;
typedef uint8_t state_t;
/************************************************************
*
@ -393,6 +392,12 @@ addNodeToGroup(nodenum_t i)
addNodeTransistor(i, nodes_c1c2s[i][t]);
}
typedef struct {
BOOL value:1;
BOOL floating:1;
} state_t;
/*
* 1. if the group is connected to GND, it's 0
* 2. if the group is connected to VCC, it's 1
@ -402,39 +407,42 @@ addNodeToGroup(nodenum_t i)
* 6. otherwise, it's 0/floating (if there is a 0/floating node,
* which is always the case)
*/
static inline void
getNodeValue(BOOL *value, BOOL *floating)
static inline state_t
getNodeValue()
{
state_t state = { .value = 0, .floating = 0 };
if (group_contains(vss)) {
*value = 0;
*floating = 0;
return;
state.value = 0;
state.floating = 0;
return state;
}
if (group_contains(vcc)) {
*value = 1;
*floating = 0;
return;
state.value = 1;
state.floating = 0;
return state;
}
*value = 0;
*floating = 1;
state.value = 0;
state.floating = 1;
for (count_t i = 0; i < group_count(); i++) {
nodenum_t nn = group_get(i);
if (get_nodes_pullup(nn)) {
*value = 1;
*floating = 0;
return;
state.value = 1;
state.floating = 0;
return state;
}
if (get_nodes_pulldown(nn)) {
*value = 0;
*floating = 0;
return;
state.value = 0;
state.floating = 0;
return state;
}
if (get_nodes_state_value(nn) && get_nodes_state_floating(nn))
*value = 1;
state.value = 1;
}
return state;
}
void
@ -509,8 +517,8 @@ recalcNode(nodenum_t node)
addNodeToGroup(node);
/* get the state of the group */
BOOL newv_value, newv_floating;
getNodeValue(&newv_value, &newv_floating);
state_t newv = getNodeValue();
/*
* now all nodes in this group are in this state,
* - all transistors switched by nodes the group
@ -520,9 +528,9 @@ recalcNode(nodenum_t node)
*/
for (count_t i = 0; i < group_count(); i++) {
nodenum_t nn = group_get(i);
BOOL needs_recalc = get_nodes_state_value(nn) != newv_value;
set_nodes_state_value(nn, newv_value);
set_nodes_state_floating(nn, newv_floating);
BOOL needs_recalc = get_nodes_state_value(nn) != newv.value;
set_nodes_state_value(nn, newv.value);
set_nodes_state_floating(nn, newv.floating);
if (needs_recalc)
for (count_t t = 0; t < nodes_gatecount[nn]; t++)
toggleTransistor(nodes_gates[nn][t]);