On Thursday, May 19, 2016 8:39:45 AM PDT Michael Schellenberger Costa wrote: > Hi Kenneth, > > Am 19.05.2016 um 00:00 schrieb Kenneth Graunke: > > ffma is an explicitly fused multiply add with higher precision. > > The optimizer will take care of promoting mul/add to fma when > > it's beneficial to do so. > > > > This fixes failures on Gen4-5 when using this pass, as those platforms > > don't actually implement fma(). > I assume here you mean ffma()? > --Michael
Either, really - fma() is the GLSL built-in function for fused multiply-adds, which corresponds to the NIR opcode 'ffma', and the i965 opcode 'mad'. --Ken
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