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inpptree.c, fix differentiation of PTF_FLOOR PTF_CEIL and PTF_POW

This commit is contained in:
rlar 2012-04-05 21:55:44 +02:00
parent 149345068f
commit 7641450b29
1 changed files with 4 additions and 6 deletions
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10
src/spicelib/parser/inpptree.c
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@ -402,12 +402,12 @@ static INPparseNode *PTdifferentiate(INPparseNode * p, int varnum)
arg1 = mkf(PTF_USTEP, p->left);
break;
case PTF_FLOOR: /* floor(u) */
arg1 = mkf(PTF_FLOOR, p->left);
case PTF_FLOOR: /* naive: D(floor(u)) = 0 */
arg1 = mkcon(0.0);
break;
case PTF_CEIL: /* ceil(u) */
arg1 = mkf(PTF_CEIL, p->left);
case PTF_CEIL: /* naive: D(ceil(u)) = 0 */
arg1 = mkcon(0.0);
break;
@ -505,8 +505,6 @@ static INPparseNode *PTdifferentiate(INPparseNode * p, int varnum)
mkb(PT_DIVIDE, arg1, p->left->left)),
mkb(PT_TIMES, arg2, mkf(PTF_LN, p->left->left))));
}
arg2 = PTdifferentiate(p->left->left, varnum);
newp = mkb(PT_TIMES, arg1, arg2);
return (newp);
}