Re: [linux-audio-dev] Re: Quasimodo (Was: Re: LADSPA GUI)

[David Olofson]

On Sun, 12 Mar 2000, Paul Barton-Davis wrote:
> OK, so take the construction:
> 
>     if (variable) { 
>          output = some_opcode (arg1, arg2, arg3);
>     } else {
>          output = some_other_opcode (arg3);
>     }
> 

The SIMD (ie no conditional brances, as the "threads" are running
hardsynced, in parallel) way of doing it:

        _output1 = some_opcode (arg1, arg2, arg3);
        _output2 = some_other_opcode (arg3);
        output = _output1 * variable + _output1 * (1 - variable);

Obviously, this means that both opcodes are evaluated all the time...


//David


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