[Mesa-dev] Missing integer "set" opcodes in Gallium

[Ian Romanick]

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On 08/29/2011 01:41 PM, Zack Rusin wrote:
> On Monday, August 29, 2011 04:02:08 PM Zack Rusin wrote:
>> Either way though if GL needs those ops then, like Brian mentioned, it'd be
>> a  good idea to add them.
> 
> Actually I think it seems easier to just flip the ops rather than add new 
> instructions, i.e. change stuff like a > b, to b < a, and a <= b to b >= a. 
> Just an opinion though, I don't have strong preferences here. 

For what it's worth, this is how most hardware implements many of the
floating-point set-on instructions.  It's even easier there because you
also have per-operand negation.  Implementing the full set as
instructions / pseudo-ops does have the advantage of making IR dumps a
lot more readable.  *shrug*
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