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optimization

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This commit is contained in:
Michael Steil 2010-09-23 02:59:33 +00:00
parent 20b9df5df3
commit a9a7eab692
1 changed files with 8 additions and 5 deletions
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perfect6502.c
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@ -182,6 +182,12 @@ addNodeToGroup(nodenum_t i)
addNodeTransistor(i, nodes_c1c2s[i][t]);
}
// 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
// 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()
{
@ -189,16 +195,13 @@ getNodeValue()
return STATE_GND;
if (groupContains(npwr))
return STATE_VCC;
state_t flstate = STATE_UNDEFINED;
count_t i;
for (i = 0; i < groupcount; i++) {
state_t flstate = STATE_FL;
for (count_t i = 0; i < groupcount; i++) {
nodenum_t nn = group[i];
if (nodes_pullup[nn])
return STATE_PU;
if (nodes_pulldown[nn])
return STATE_PD;
if ((nodes_state[nn] == STATE_FL) && (flstate == STATE_UNDEFINED))
flstate = STATE_FL;
if (nodes_state[nn] == STATE_FH)
flstate = STATE_FH;
}