Simon Cozens wrote:
> On Wed, Aug 01, 2001 at 12:42:42AM -0400, Tim Peters wrote:
> > case BINARY_DIVIDE:
>
> case? Wowsers. Hey, Ruby does that too. We use function pointers,
> FWIW.
People (including me) have tried using threaded code
(http://www.complang.tuwien.ac.at/forth/threaded-code.html) and have not
measured any significant advantage. I suspect the opcodes to much
longer to evaluate than doing the dispatch.
> Oh, and here's our divide, for comparison:
>
> PP(pp_divide)
> {
> dSP; dATARGET; tryAMAGICbin(div,opASSIGN);
> {
> dPOPPOPnnrl;
> NV value;
> if (right == 0.0)
> DIE(aTHX_ "Illegal division by zero");
> value = left / right;
> PUSHn( value );
> RETURN;
> }
> }
Does every Perl opcode do a function call?
Neil
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