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Message: [QUOTE="Shao Miller, post: 4214783"] Agreed. I don't understand exactly what the original poster wants to achieve, but my impression is that they want "lock-steppedness." :) Agreed. But one can make some educated guesses about the timing of operations. In the table-using code I posted else-thread, if the 'func' function is called with different arguments simultaneously, those invocations should return the result simultaneously, barring external interruptions. Of course, such a table strategy becomes unwieldy as more parameters are required; heh. Agreed. The 'gcc -save-temps' is handy for examining resulting '.s' files. This shows that the table-using code doesn't have any branches (excluding the function calls). Of course, 'gcc' mightn't be applicable to the original poster's OpenCL needs. Loops change timing, of course. [/QUOTE]