Originally posted by: Marius505 The context is Chapter 2.3 "Control Flow and Clauses" from the R600_Instruction_Set_Architecture document.
I would like to understand the phrase "Multiple clauses of a program can execute in parallel if they contain instructions of different types and the clauses are independent of one another" from the point of view of the processors in a SIMD array running ALU clauses. Considering that all 16 units follow the same code it is unclear what exactly is parallelized. I am missing somethig.. please provide an example. |
I think it means they run parallel across the SIMDs, not across the Threads Processors in a SIMD. Each SIMD is capable of running different code at one time.
Also, sometimes the docs say "clause" and mean bundle/instruction group and sometimes the docs say "clause" and mean "Control Flow clause", just FYI.