Displaying 3 results from an estimated 3 matches for "getstagelatency".
2016 Jan 06
2
DFAPacketizer, Scheduling and LoadLatency
On Tue, Nov 17, 2015 at 11:15 AM, Krzysztof Parzyszek <
kparzysz at codeaurora.org> wrote:
> On 11/17/2015 12:26 PM, Rail Shafigulin wrote:
>
>>
>> I tried setting
>> let mayLoad = 1 {
>> class InstrLD .... {
>> }
>> }
>>
>> But that didn't seem to work. When I looked at the debug output the
>> latency for the load
2016 Jun 08
2
Instruction Itineraries: question about operand latencies
...line. So for simple cases, like
> your example, one would expect that A and B should have the same value.But
> there is different API for accessing to A and B.
>
> An example of accessing to B in the source code can be found here:
> PPCInstrInfo::getInstrLatency. You can also look at getStageLatency in
> include/llvm/MC/MCInstrItineraries.h. From this two you can probably find
> other relevant places.
>
> Hope this helps
> Ehsan
>
>
> On Mon, Jun 6, 2016 at 2:37 PM, Phil Tomson via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
>
>> In our architectur...
2016 Jun 06
2
Instruction Itineraries: question about operand latencies
In our architecture loads from certain memory locations take a long time to
complete (on the order of 150 clock cycles). Since we don't have a way to
tell at compile time if the address being loaded from lies in slow or fast
memory, I've gone ahead and made all of the load numbers high, such as:
InstrItinData< II_LOAD1, [InstrStage<150, [AGU]>]>,
However, I see that