search for: instritindata

...D2, DISS1, DISS2, FRACC, >>>>>> + IRACC, IEXE1, IEXE2, IWB, LRACC, JEXE1, JEXE2, JWB, AGEN, CRD, > LWB, >>>>>> + FEXE1, FEXE2, FEXE3, FEXE4, FEXE5, FEXE6, FWB, LWARX_Hold], >>>>>> + [GPR_Bypass, FPR_Bypass], [ >>>>>> + InstrItinData<IntGeneral , [InstrStage<1, [IFTH1, IFTH2]>, >>>>>> + InstrStage<1, [PDCD1, PDCD2]>, >>>>>> + InstrStage<1, [DISS1, DISS2]>, >>>>>> +...

...rchitecture 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 there is another field which I haven't specified where operand latencies are specified. Here's an example from ARMScheduleA8.td: InstrItinData<IIC_iALUi ,[InstrStage<1, [A8_Pipe0, A8_Pipe1]>], [2, 2]>...

...ddress space pointer register is being used - but it looks like they're virtual there) Phil On Mon, Jun 6, 2016 at 3:10 PM, Ehsan Amiri <ehsanamiri at gmail.com> wrote: > Hi Phil > > There are some comments in "include/llvm/Target/TargetItinerary.td" where > class InstrItinData is defined. > > B is the number of cycles after issue where the first operand of the > instruction is defined. A is the number of cycles that the instruction will > stay in that particular stage in the pipeline. So for simple cases, like > your example, one would expect that A and B...

...id OperandCycles are optional "cycle counts". They specify the cycle after instruction issue the values which correspond to specific operand indices are defined or read. I thought if an instruction reads the operands at the first cycle and produces the result at the second cycle. InstrItinData should be written in something like this, InstrItinData<IIC_iALUr ,[InstrStage<1, [FU_x]>], [2, 1, 1]> Therefore, for operand latency of iALUr output to iALUr input is latency of "1". However, by the implementatoin of getOperandLatency, the latency of such definition is...

...ear how does DFAPacketizer and the scheduler know a given instruction is a load. Here is what I'm talking about Let's assume my VLIW target is described as follows: def MyTargetItineraries : ProcessorItineraries<[Slot0, Slot1], [], [ .............................. InstrItinData<RI, [InstrStage<1, [Slot0, Slot1]>]>, InstrItinData<LD, [InstrStage<1, [Slot0, Slot1]>]>, // <-- This itinerary class describes load instructions InstrItinData<BR, [InstrStage<1, [Slot0]>]> .............................. ]>; d...

I have an instruction that takes no operands, and produces two results, in two consecutive cycles. I tried both of the following to my Schedule.td file: InstrItinData<IIMyInstr, [InstrStage<2, [FuncU]>], [1, 2]>, InstrItinData<IIMyInstr, [InstrStage<1, [FuncU]>, InstrStage<1, [FuncU]>], [1, 2]>, From what I can see in examples, these say that the first operand is ready the cycle after issue, and the second is ready 2 cycles...

...2013 11:16 AM *To:* llvmdev at cs.uiuc.edu *Subject:* [LLVMdev] DFAPacketizer Hi, I am having problems writing the ProcessorItineraries list. As instructions on my VLIW target have varying size I want to model both cpu units and bundle bits as FUs. The following does not work, to my surprise: InstrItinData<ALU, [InstrStage<1, [BITS1,BITS2, BITS3, BITS4], 0>, InstrStage<1, [ALU1, ALU2]>]> I want to express that there are two ALU's, and four bundle slots, and in this case while allocating this type of instructions several times, I would like to be allowed only two such instruc...

...ied 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 instruction was set to 1. However when I changed load itinerary description in the schedule to def MyTargetItineraries : .............. InstrItinData<LD, [InstrStage<2, [BranchSlot, NonBranchSlot], 1>]>, .............. That seem to produce correct latency in the debug output. Do you know what could be the problem? Am I missing something? To give you a full disclosure, I'm using LLVM 3.5 and at the moment I can't switch...

...ally, consider a case where a floating-point load > simultaneously/ > > /> uses units from a floating-point pipeline and a load/store pipeline./ > > /Look into ARM itineraries, they contain a decent amount of such > examples./ > > // > > [Head feb 2013:] > > InstrItinData<IIC_iMOVi , [InstrStage<1, [SW_DIS0, SW_DIS1, SW_DIS2], 0>, > > InstrStage<1, [SW_ALU0, SW_ALU1]>], > > [1]>, > > ------------------------------------------------------------------------ > > *From:*Anshuman Dasgupta [mailto:ada...

...; (maybe some trick with setting NextCycles = 0)? Yep! > Specifically, consider a case where a floating-point load simultaneously > uses units from a floating-point pipeline and a load/store pipeline. Look into ARM itineraries, they contain a decent amount of such examples. [Head feb 2013:] InstrItinData<IIC_iMOVi , [InstrStage<1, [SW_DIS0, SW_DIS1, SW_DIS2], 0>, InstrStage<1, [SW_ALU0, SW_ALU1]>], [1]>, ________________________________ From: Anshuman Dasgupta [mailto:adasgupt at codeaurora.org] Sen...

I'd appreciate some help in figuring out how to determine which InstrItinClass an instruction belongs to. For example, an InstrItinClass is defined in Schedule.td as: def FOO : InstrItinClass; Which is then used to build an InstrItinData in ProcessorItineraries and to specify the class of a particular instruction. I'd like to find out from a given instruction which class it belongs to, "FOO" or any other. TIA -- Evandro Menezes Austin, TX emenezes at codeaurora.org Qualcomm Innovation Center, Inc i...

On May 9, 2013, at 4:02 AM, Fraser Cormack <fraser at codeplay.com> wrote: > I have an instruction that takes no operands, and produces two results, in two consecutive cycles. > > I tried both of the following to my Schedule.td file: > > InstrItinData<IIMyInstr, [InstrStage<2, [FuncU]>], [1, 2]>, > InstrItinData<IIMyInstr, [InstrStage<1, [FuncU]>, InstrStage<1, [FuncU]>], [1, 2]>, > > From what I can see in examples, these say that the first operand is ready the cycle after issue, and the second is rea...

...t that didn't seem to work. When I looked at the debug output the >> latency for the load instruction was set to 1. >> >> However when I changed load itinerary description in the schedule to >> >> def MyTargetItineraries : >> .............. >> InstrItinData<LD, [InstrStage<2, [BranchSlot, NonBranchSlot], 1>]>, >> .............. >> >> That seem to produce correct latency in the debug output. >> >> Do you know what could be the problem? Am I missing something? To give >> you a full disclosure, I'm...

...mack <fraser at codeplay.com > <mailto:fraser at codeplay.com>> wrote: > >> I have an instruction that takes no operands, and produces two >> results, in two consecutive cycles. >> >> I tried both of the following to my Schedule.td file: >> >> InstrItinData<IIMyInstr, [InstrStage<2, [FuncU]>], [1, 2]>, >> InstrItinData<IIMyInstr, [InstrStage<1, [FuncU]>, InstrStage<1, >> [FuncU]>], [1, 2]>, >> >> From what I can see in examples, these say that the first operand is >> ready the cycle aft...

...; (maybe some trick with setting NextCycles = 0)? Yep! > Specifically, consider a case where a floating-point load simultaneously > uses units from a floating-point pipeline and a load/store pipeline. Look into ARM itineraries, they contain a decent amount of such examples. [Head feb 2013:] InstrItinData<IIC_iMOVi , [InstrStage<1, [SW_DIS0, SW_DIS1, SW_DIS2], 0>, InstrStage<1, [SW_ALU0, SW_ALU1]>], [1]>, ________________________________ From: Anshuman Dasgupta [mailto:adasgupt at codeaurora.org] Sen...

Hi, Akira, I found you maintain mips MipsSchedule.td. does it correct? in MipsSchedule.td, every InstrItinData only uses one InstrStage. there's no ByPass info out there. are you sure this reflects the real R4xxx/R5xxx processors. why IILoad uses funcition unit ALU? InstrItinData<IILoad , [InstrStage<3, [ALU]>]> for my previous question, I have new input after reading the cod...

...pelined (so it can start a new one after one cycle) First of all, is there a document that describes the instruction itinerary model in some detail ? For example looking at MBlaze target MBlaeSchedule.td I can see something like MblazeSchedule.td ... def IIImul : InstrItinClass; ... InstrItinData<IIImul , [InstrStage<17, [IMULDIV]>]>, Does that mean Mul's are expected to have a latency of 17 clks ? Mips target has something similar. In Mblaze case I can see the result being used the very next cycle mul *r3*, r6, r5 addik r3,* r3*, 4...

Akira, Thanks you for response. I understand Post-RA schedule make uses of scoreboardHazardRecognizer. But I found mips codes are good enough by default. basically, I can not easily eyeball any bubbles. I don't understand how they can do that without post-RA-sched. pre-ra-scheduler eg. (SelectionDAG/ScheduleDAGRRList.cpp) has little information and they can only schedule node in topology

In the example provided: // InstrItinData<IIC_iLoad_i , [InstrStage<1, [A9_Pipe1]>, // InstrStage<1, [A9_AGU]>], // [3, 1], [A9_LdBypass]>, If there is an operand dependency, does the scheduler assume that the instruction is held in A9_Pipe1 or in A9_AGU until th...

...PM, Evandro Menezes wrote: > I'd appreciate some help in figuring out how to determine which > InstrItinClass an instruction belongs to. > > For example, an InstrItinClass is defined in Schedule.td as: > > def FOO : InstrItinClass; > > Which is then used to build an InstrItinData in ProcessorItineraries and > to specify the class of a particular instruction. > > I'd like to find out from a given instruction which class it belongs to, > "FOO" or any other. > > TIA > > -- > Evandro Menezes Austin, TX emenezes at cod...