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/*
\funcref{fun\_sub}{void fun\_sub ()}
{}
{}
{pop(), copylist(), delfromlist(), discard()}
{}
{funsub.c}
{
Function {\em fun\_sub()} processes opcode {\em op\_sub}. Two variables
are popped and subtracted. Depending on their type, two integer values
are subtracted or a difference between two lists is computed.
The result of the subtraction is stored in a temporary variable, which
is then pushed.
The two popped variables are discarded after use.
}
*/
#include "opcodefun.ih"
void fun_sub ()
{
VAR_ rval = *copyCons(top()); /* make a copy */
pop(); /* remove the r-operand */
subtract(top(), &rval); /* subtract the rval to the top */
destructor(&rval); /* remove the local var */
}
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