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author | Brian Gaeke <gaeke@uiuc.edu> | 2004-02-25 18:44:15 +0000 |
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committer | Brian Gaeke <gaeke@uiuc.edu> | 2004-02-25 18:44:15 +0000 |
commit | 94e95d2b3eaaf3404b9306c7f402a26beb18c9c4 (patch) | |
tree | 01a3a8922d75ff482e96b9905550c37715f16674 /llvm/lib/Target/Sparc/UltraSparcSchedInfo.cpp | |
parent | 864c9014443c716da8851661d8e26c11b16bcca4 (diff) | |
download | bcm5719-llvm-94e95d2b3eaaf3404b9306c7f402a26beb18c9c4.tar.gz bcm5719-llvm-94e95d2b3eaaf3404b9306c7f402a26beb18c9c4.zip |
Great renaming: Sparc --> SparcV9
llvm-svn: 11826
Diffstat (limited to 'llvm/lib/Target/Sparc/UltraSparcSchedInfo.cpp')
-rw-r--r-- | llvm/lib/Target/Sparc/UltraSparcSchedInfo.cpp | 773 |
1 files changed, 0 insertions, 773 deletions
diff --git a/llvm/lib/Target/Sparc/UltraSparcSchedInfo.cpp b/llvm/lib/Target/Sparc/UltraSparcSchedInfo.cpp deleted file mode 100644 index 016587458ba..00000000000 --- a/llvm/lib/Target/Sparc/UltraSparcSchedInfo.cpp +++ /dev/null @@ -1,773 +0,0 @@ -//===-- UltraSparcSchedInfo.cpp -------------------------------------------===// -// -// The LLVM Compiler Infrastructure -// -// This file was developed by the LLVM research group and is distributed under -// the University of Illinois Open Source License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// Describe the scheduling characteristics of the UltraSparc -// -//===----------------------------------------------------------------------===// - -#include "SparcInternals.h" - -using namespace llvm; - -/*--------------------------------------------------------------------------- -Scheduling guidelines for SPARC IIi: - -I-Cache alignment rules (pg 326) --- Align a branch target instruction so that it's entire group is within - the same cache line (may be 1-4 instructions). -** Don't let a branch that is predicted taken be the last instruction - on an I-cache line: delay slot will need an entire line to be fetched --- Make a FP instruction or a branch be the 4th instruction in a group. - For branches, there are tradeoffs in reordering to make this happen - (see pg. 327). -** Don't put a branch in a group that crosses a 32-byte boundary! - An artificial branch is inserted after every 32 bytes, and having - another branch will force the group to be broken into 2 groups. - -iTLB rules: --- Don't let a loop span two memory pages, if possible - -Branch prediction performance: --- Don't make the branch in a delay slot the target of a branch --- Try not to have 2 predicted branches within a group of 4 instructions - (because each such group has a single branch target field). --- Try to align branches in slots 0, 2, 4 or 6 of a cache line (to avoid - the wrong prediction bits being used in some cases). - -D-Cache timing constraints: --- Signed int loads of less than 64 bits have 3 cycle latency, not 2 --- All other loads that hit in D-Cache have 2 cycle latency --- All loads are returned IN ORDER, so a D-Cache miss will delay a later hit --- Mis-aligned loads or stores cause a trap. In particular, replace - mis-aligned FP double precision l/s with 2 single-precision l/s. --- Simulations of integer codes show increase in avg. group size of - 33% when code (including esp. non-faulting loads) is moved across - one branch, and 50% across 2 branches. - -E-Cache timing constraints: --- Scheduling for E-cache (D-Cache misses) is effective (due to load buffering) - -Store buffer timing constraints: --- Stores can be executed in same cycle as instruction producing the value --- Stores are buffered and have lower priority for E-cache until - highwater mark is reached in the store buffer (5 stores) - -Pipeline constraints: --- Shifts can only use IEU0. --- CC setting instructions can only use IEU1. --- Several other instructions must only use IEU1: - EDGE(?), ARRAY(?), CALL, JMPL, BPr, PST, and FCMP. --- Two instructions cannot store to the same register file in a single cycle - (single write port per file). - -Issue and grouping constraints: --- FP and branch instructions must use slot 4. --- Shift instructions cannot be grouped with other IEU0-specific instructions. --- CC setting instructions cannot be grouped with other IEU1-specific instrs. --- Several instructions must be issued in a single-instruction group: - MOVcc or MOVr, MULs/x and DIVs/x, SAVE/RESTORE, many others --- A CALL or JMPL breaks a group, ie, is not combined with subsequent instrs. --- --- - -Branch delay slot scheduling rules: --- A CTI couple (two back-to-back CTI instructions in the dynamic stream) - has a 9-instruction penalty: the entire pipeline is flushed when the - second instruction reaches stage 9 (W-Writeback). --- Avoid putting multicycle instructions, and instructions that may cause - load misses, in the delay slot of an annulling branch. --- Avoid putting WR, SAVE..., RESTORE and RETURN instructions in the - delay slot of an annulling branch. - - *--------------------------------------------------------------------------- */ - -//--------------------------------------------------------------------------- -// List of CPUResources for UltraSPARC IIi. -//--------------------------------------------------------------------------- - -static const CPUResource AllIssueSlots( "All Instr Slots", 4); -static const CPUResource IntIssueSlots( "Int Instr Slots", 3); -static const CPUResource First3IssueSlots("Instr Slots 0-3", 3); -static const CPUResource LSIssueSlots( "Load-Store Instr Slot", 1); -static const CPUResource CTIIssueSlots( "Ctrl Transfer Instr Slot", 1); -static const CPUResource FPAIssueSlots( "FP Instr Slot 1", 1); -static const CPUResource FPMIssueSlots( "FP Instr Slot 2", 1); - -// IEUN instructions can use either Alu and should use IAluN. -// IEU0 instructions must use Alu 1 and should use both IAluN and IAlu0. -// IEU1 instructions must use Alu 2 and should use both IAluN and IAlu1. -static const CPUResource IAluN("Int ALU 1or2", 2); -static const CPUResource IAlu0("Int ALU 1", 1); -static const CPUResource IAlu1("Int ALU 2", 1); - -static const CPUResource LSAluC1("Load/Store Unit Addr Cycle", 1); -static const CPUResource LSAluC2("Load/Store Unit Issue Cycle", 1); -static const CPUResource LdReturn("Load Return Unit", 1); - -static const CPUResource FPMAluC1("FP Mul/Div Alu Cycle 1", 1); -static const CPUResource FPMAluC2("FP Mul/Div Alu Cycle 2", 1); -static const CPUResource FPMAluC3("FP Mul/Div Alu Cycle 3", 1); - -static const CPUResource FPAAluC1("FP Other Alu Cycle 1", 1); -static const CPUResource FPAAluC2("FP Other Alu Cycle 2", 1); -static const CPUResource FPAAluC3("FP Other Alu Cycle 3", 1); - -static const CPUResource IRegReadPorts("Int Reg ReadPorts", INT_MAX); // CHECK -static const CPUResource IRegWritePorts("Int Reg WritePorts", 2); // CHECK -static const CPUResource FPRegReadPorts("FP Reg Read Ports", INT_MAX);// CHECK -static const CPUResource FPRegWritePorts("FP Reg Write Ports", 1); // CHECK - -static const CPUResource CTIDelayCycle( "CTI delay cycle", 1); -static const CPUResource FCMPDelayCycle("FCMP delay cycle", 1); - - - -//--------------------------------------------------------------------------- -// const InstrClassRUsage SparcRUsageDesc[] -// -// Purpose: -// Resource usage information for instruction in each scheduling class. -// The InstrRUsage Objects for individual classes are specified first. -// Note that fetch and decode are decoupled from the execution pipelines -// via an instr buffer, so they are not included in the cycles below. -//--------------------------------------------------------------------------- - -static const InstrClassRUsage NoneClassRUsage = { - SPARC_NONE, - /*totCycles*/ 7, - - /* maxIssueNum */ 4, - /* isSingleIssue */ false, - /* breaksGroup */ false, - /* numBubbles */ 0, - - /*numSlots*/ 4, - /* feasibleSlots[] */ { 0, 1, 2, 3 }, - - /*numEntries*/ 0, - /* V[] */ { - /*Cycle G */ - /*Ccle E */ - /*Cycle C */ - /*Cycle N1*/ - /*Cycle N1*/ - /*Cycle N1*/ - /*Cycle W */ - } -}; - -static const InstrClassRUsage IEUNClassRUsage = { - SPARC_IEUN, - /*totCycles*/ 7, - - /* maxIssueNum */ 3, - /* isSingleIssue */ false, - /* breaksGroup */ false, - /* numBubbles */ 0, - - /*numSlots*/ 3, - /* feasibleSlots[] */ { 0, 1, 2 }, - - /*numEntries*/ 4, - /* V[] */ { - /*Cycle G */ { AllIssueSlots.rid, 0, 1 }, - { IntIssueSlots.rid, 0, 1 }, - /*Cycle E */ { IAluN.rid, 1, 1 }, - /*Cycle C */ - /*Cycle N1*/ - /*Cycle N1*/ - /*Cycle N1*/ - /*Cycle W */ { IRegWritePorts.rid, 6, 1 } - } -}; - -static const InstrClassRUsage IEU0ClassRUsage = { - SPARC_IEU0, - /*totCycles*/ 7, - - /* maxIssueNum */ 1, - /* isSingleIssue */ false, - /* breaksGroup */ false, - /* numBubbles */ 0, - - /*numSlots*/ 3, - /* feasibleSlots[] */ { 0, 1, 2 }, - - /*numEntries*/ 5, - /* V[] */ { - /*Cycle G */ { AllIssueSlots.rid, 0, 1 }, - { IntIssueSlots.rid, 0, 1 }, - /*Cycle E */ { IAluN.rid, 1, 1 }, - { IAlu0.rid, 1, 1 }, - /*Cycle C */ - /*Cycle N1*/ - /*Cycle N1*/ - /*Cycle N1*/ - /*Cycle W */ { IRegWritePorts.rid, 6, 1 } - } -}; - -static const InstrClassRUsage IEU1ClassRUsage = { - SPARC_IEU1, - /*totCycles*/ 7, - - /* maxIssueNum */ 1, - /* isSingleIssue */ false, - /* breaksGroup */ false, - /* numBubbles */ 0, - - /*numSlots*/ 3, - /* feasibleSlots[] */ { 0, 1, 2 }, - - /*numEntries*/ 5, - /* V[] */ { - /*Cycle G */ { AllIssueSlots.rid, 0, 1 }, - { IntIssueSlots.rid, 0, 1 }, - /*Cycle E */ { IAluN.rid, 1, 1 }, - { IAlu1.rid, 1, 1 }, - /*Cycle C */ - /*Cycle N1*/ - /*Cycle N1*/ - /*Cycle N1*/ - /*Cycle W */ { IRegWritePorts.rid, 6, 1 } - } -}; - -static const InstrClassRUsage FPMClassRUsage = { - SPARC_FPM, - /*totCycles*/ 7, - - /* maxIssueNum */ 1, - /* isSingleIssue */ false, - /* breaksGroup */ false, - /* numBubbles */ 0, - - /*numSlots*/ 4, - /* feasibleSlots[] */ { 0, 1, 2, 3 }, - - /*numEntries*/ 7, - /* V[] */ { - /*Cycle G */ { AllIssueSlots.rid, 0, 1 }, - { FPMIssueSlots.rid, 0, 1 }, - /*Cycle E */ { FPRegReadPorts.rid, 1, 1 }, - /*Cycle C */ { FPMAluC1.rid, 2, 1 }, - /*Cycle N1*/ { FPMAluC2.rid, 3, 1 }, - /*Cycle N1*/ { FPMAluC3.rid, 4, 1 }, - /*Cycle N1*/ - /*Cycle W */ { FPRegWritePorts.rid, 6, 1 } - } -}; - -static const InstrClassRUsage FPAClassRUsage = { - SPARC_FPA, - /*totCycles*/ 7, - - /* maxIssueNum */ 1, - /* isSingleIssue */ false, - /* breaksGroup */ false, - /* numBubbles */ 0, - - /*numSlots*/ 4, - /* feasibleSlots[] */ { 0, 1, 2, 3 }, - - /*numEntries*/ 7, - /* V[] */ { - /*Cycle G */ { AllIssueSlots.rid, 0, 1 }, - { FPAIssueSlots.rid, 0, 1 }, - /*Cycle E */ { FPRegReadPorts.rid, 1, 1 }, - /*Cycle C */ { FPAAluC1.rid, 2, 1 }, - /*Cycle N1*/ { FPAAluC2.rid, 3, 1 }, - /*Cycle N1*/ { FPAAluC3.rid, 4, 1 }, - /*Cycle N1*/ - /*Cycle W */ { FPRegWritePorts.rid, 6, 1 } - } -}; - -static const InstrClassRUsage LDClassRUsage = { - SPARC_LD, - /*totCycles*/ 7, - - /* maxIssueNum */ 1, - /* isSingleIssue */ false, - /* breaksGroup */ false, - /* numBubbles */ 0, - - /*numSlots*/ 3, - /* feasibleSlots[] */ { 0, 1, 2, }, - - /*numEntries*/ 6, - /* V[] */ { - /*Cycle G */ { AllIssueSlots.rid, 0, 1 }, - { First3IssueSlots.rid, 0, 1 }, - { LSIssueSlots.rid, 0, 1 }, - /*Cycle E */ { LSAluC1.rid, 1, 1 }, - /*Cycle C */ { LSAluC2.rid, 2, 1 }, - { LdReturn.rid, 2, 1 }, - /*Cycle N1*/ - /*Cycle N1*/ - /*Cycle N1*/ - /*Cycle W */ { IRegWritePorts.rid, 6, 1 } - } -}; - -static const InstrClassRUsage STClassRUsage = { - SPARC_ST, - /*totCycles*/ 7, - - /* maxIssueNum */ 1, - /* isSingleIssue */ false, - /* breaksGroup */ false, - /* numBubbles */ 0, - - /*numSlots*/ 3, - /* feasibleSlots[] */ { 0, 1, 2 }, - - /*numEntries*/ 4, - /* V[] */ { - /*Cycle G */ { AllIssueSlots.rid, 0, 1 }, - { First3IssueSlots.rid, 0, 1 }, - { LSIssueSlots.rid, 0, 1 }, - /*Cycle E */ { LSAluC1.rid, 1, 1 }, - /*Cycle C */ { LSAluC2.rid, 2, 1 } - /*Cycle N1*/ - /*Cycle N1*/ - /*Cycle N1*/ - /*Cycle W */ - } -}; - -static const InstrClassRUsage CTIClassRUsage = { - SPARC_CTI, - /*totCycles*/ 7, - - /* maxIssueNum */ 1, - /* isSingleIssue */ false, - /* breaksGroup */ false, - /* numBubbles */ 0, - - /*numSlots*/ 4, - /* feasibleSlots[] */ { 0, 1, 2, 3 }, - - /*numEntries*/ 4, - /* V[] */ { - /*Cycle G */ { AllIssueSlots.rid, 0, 1 }, - { CTIIssueSlots.rid, 0, 1 }, - /*Cycle E */ { IAlu0.rid, 1, 1 }, - /*Cycles E-C */ { CTIDelayCycle.rid, 1, 2 } - /*Cycle C */ - /*Cycle N1*/ - /*Cycle N1*/ - /*Cycle N1*/ - /*Cycle W */ - } -}; - -static const InstrClassRUsage SingleClassRUsage = { - SPARC_SINGLE, - /*totCycles*/ 7, - - /* maxIssueNum */ 1, - /* isSingleIssue */ true, - /* breaksGroup */ false, - /* numBubbles */ 0, - - /*numSlots*/ 1, - /* feasibleSlots[] */ { 0 }, - - /*numEntries*/ 5, - /* V[] */ { - /*Cycle G */ { AllIssueSlots.rid, 0, 1 }, - { AllIssueSlots.rid, 0, 1 }, - { AllIssueSlots.rid, 0, 1 }, - { AllIssueSlots.rid, 0, 1 }, - /*Cycle E */ { IAlu0.rid, 1, 1 } - /*Cycle C */ - /*Cycle N1*/ - /*Cycle N1*/ - /*Cycle N1*/ - /*Cycle W */ - } -}; - - -static const InstrClassRUsage SparcRUsageDesc[] = { - NoneClassRUsage, - IEUNClassRUsage, - IEU0ClassRUsage, - IEU1ClassRUsage, - FPMClassRUsage, - FPAClassRUsage, - CTIClassRUsage, - LDClassRUsage, - STClassRUsage, - SingleClassRUsage -}; - - - -//--------------------------------------------------------------------------- -// const InstrIssueDelta SparcInstrIssueDeltas[] -// -// Purpose: -// Changes to issue restrictions information in InstrClassRUsage for -// instructions that differ from other instructions in their class. -//--------------------------------------------------------------------------- - -static const InstrIssueDelta SparcInstrIssueDeltas[] = { - - // opCode, isSingleIssue, breaksGroup, numBubbles - - // Special cases for single-issue only - // Other single issue cases are below. -//{ V9::LDDA, true, true, 0 }, -//{ V9::STDA, true, true, 0 }, -//{ V9::LDDF, true, true, 0 }, -//{ V9::LDDFA, true, true, 0 }, - { V9::ADDCr, true, true, 0 }, - { V9::ADDCi, true, true, 0 }, - { V9::ADDCccr, true, true, 0 }, - { V9::ADDCcci, true, true, 0 }, - { V9::SUBCr, true, true, 0 }, - { V9::SUBCi, true, true, 0 }, - { V9::SUBCccr, true, true, 0 }, - { V9::SUBCcci, true, true, 0 }, -//{ V9::LDSTUB, true, true, 0 }, -//{ V9::SWAP, true, true, 0 }, -//{ V9::SWAPA, true, true, 0 }, -//{ V9::CAS, true, true, 0 }, -//{ V9::CASA, true, true, 0 }, -//{ V9::CASX, true, true, 0 }, -//{ V9::CASXA, true, true, 0 }, -//{ V9::LDFSR, true, true, 0 }, -//{ V9::LDFSRA, true, true, 0 }, -//{ V9::LDXFSR, true, true, 0 }, -//{ V9::LDXFSRA, true, true, 0 }, -//{ V9::STFSR, true, true, 0 }, -//{ V9::STFSRA, true, true, 0 }, -//{ V9::STXFSR, true, true, 0 }, -//{ V9::STXFSRA, true, true, 0 }, -//{ V9::SAVED, true, true, 0 }, -//{ V9::RESTORED, true, true, 0 }, -//{ V9::FLUSH, true, true, 9 }, -//{ V9::FLUSHW, true, true, 9 }, -//{ V9::ALIGNADDR, true, true, 0 }, - { V9::RETURNr, true, true, 0 }, - { V9::RETURNi, true, true, 0 }, -//{ V9::DONE, true, true, 0 }, -//{ V9::RETRY, true, true, 0 }, -//{ V9::TCC, true, true, 0 }, -//{ V9::SHUTDOWN, true, true, 0 }, - - // Special cases for breaking group *before* - // CURRENTLY NOT SUPPORTED! - { V9::CALL, false, false, 0 }, - { V9::JMPLCALLr, false, false, 0 }, - { V9::JMPLCALLi, false, false, 0 }, - { V9::JMPLRETr, false, false, 0 }, - { V9::JMPLRETi, false, false, 0 }, - - // Special cases for breaking the group *after* - { V9::MULXr, true, true, (4+34)/2 }, - { V9::MULXi, true, true, (4+34)/2 }, - { V9::FDIVS, false, true, 0 }, - { V9::FDIVD, false, true, 0 }, - { V9::FDIVQ, false, true, 0 }, - { V9::FSQRTS, false, true, 0 }, - { V9::FSQRTD, false, true, 0 }, - { V9::FSQRTQ, false, true, 0 }, -//{ V9::FCMP{LE,GT,NE,EQ}, false, true, 0 }, - - // Instructions that introduce bubbles -//{ V9::MULScc, true, true, 2 }, -//{ V9::SMULcc, true, true, (4+18)/2 }, -//{ V9::UMULcc, true, true, (4+19)/2 }, - { V9::SDIVXr, true, true, 68 }, - { V9::SDIVXi, true, true, 68 }, - { V9::UDIVXr, true, true, 68 }, - { V9::UDIVXi, true, true, 68 }, -//{ V9::SDIVcc, true, true, 36 }, -//{ V9::UDIVcc, true, true, 37 }, - { V9::WRCCRr, true, true, 4 }, - { V9::WRCCRi, true, true, 4 }, -//{ V9::WRPR, true, true, 4 }, -//{ V9::RDCCR, true, true, 0 }, // no bubbles after, but see below -//{ V9::RDPR, true, true, 0 }, -}; - - - - -//--------------------------------------------------------------------------- -// const InstrRUsageDelta SparcInstrUsageDeltas[] -// -// Purpose: -// Changes to resource usage information in InstrClassRUsage for -// instructions that differ from other instructions in their class. -//--------------------------------------------------------------------------- - -static const InstrRUsageDelta SparcInstrUsageDeltas[] = { - - // MachineOpCode, Resource, Start cycle, Num cycles - - // - // JMPL counts as a load/store instruction for issue! - // - { V9::JMPLCALLr, LSIssueSlots.rid, 0, 1 }, - { V9::JMPLCALLi, LSIssueSlots.rid, 0, 1 }, - { V9::JMPLRETr, LSIssueSlots.rid, 0, 1 }, - { V9::JMPLRETi, LSIssueSlots.rid, 0, 1 }, - - // - // Many instructions cannot issue for the next 2 cycles after an FCMP - // We model that with a fake resource FCMPDelayCycle. - // - { V9::FCMPS, FCMPDelayCycle.rid, 1, 3 }, - { V9::FCMPD, FCMPDelayCycle.rid, 1, 3 }, - { V9::FCMPQ, FCMPDelayCycle.rid, 1, 3 }, - - { V9::MULXr, FCMPDelayCycle.rid, 1, 1 }, - { V9::MULXi, FCMPDelayCycle.rid, 1, 1 }, - { V9::SDIVXr, FCMPDelayCycle.rid, 1, 1 }, - { V9::SDIVXi, FCMPDelayCycle.rid, 1, 1 }, - { V9::UDIVXr, FCMPDelayCycle.rid, 1, 1 }, - { V9::UDIVXi, FCMPDelayCycle.rid, 1, 1 }, -//{ V9::SMULcc, FCMPDelayCycle.rid, 1, 1 }, -//{ V9::UMULcc, FCMPDelayCycle.rid, 1, 1 }, -//{ V9::SDIVcc, FCMPDelayCycle.rid, 1, 1 }, -//{ V9::UDIVcc, FCMPDelayCycle.rid, 1, 1 }, - { V9::STDFr, FCMPDelayCycle.rid, 1, 1 }, - { V9::STDFi, FCMPDelayCycle.rid, 1, 1 }, - { V9::FMOVRSZ, FCMPDelayCycle.rid, 1, 1 }, - { V9::FMOVRSLEZ,FCMPDelayCycle.rid, 1, 1 }, - { V9::FMOVRSLZ, FCMPDelayCycle.rid, 1, 1 }, - { V9::FMOVRSNZ, FCMPDelayCycle.rid, 1, 1 }, - { V9::FMOVRSGZ, FCMPDelayCycle.rid, 1, 1 }, - { V9::FMOVRSGEZ,FCMPDelayCycle.rid, 1, 1 }, - - // - // Some instructions are stalled in the GROUP stage if a CTI is in - // the E or C stage. We model that with a fake resource CTIDelayCycle. - // - { V9::LDDFr, CTIDelayCycle.rid, 1, 1 }, - { V9::LDDFi, CTIDelayCycle.rid, 1, 1 }, -//{ V9::LDDA, CTIDelayCycle.rid, 1, 1 }, -//{ V9::LDDSTUB, CTIDelayCycle.rid, 1, 1 }, -//{ V9::LDDSTUBA, CTIDelayCycle.rid, 1, 1 }, -//{ V9::SWAP, CTIDelayCycle.rid, 1, 1 }, -//{ V9::SWAPA, CTIDelayCycle.rid, 1, 1 }, -//{ V9::CAS, CTIDelayCycle.rid, 1, 1 }, -//{ V9::CASA, CTIDelayCycle.rid, 1, 1 }, -//{ V9::CASX, CTIDelayCycle.rid, 1, 1 }, -//{ V9::CASXA, CTIDelayCycle.rid, 1, 1 }, - - // - // Signed int loads of less than dword size return data in cycle N1 (not C) - // and put all loads in consecutive cycles into delayed load return mode. - // - { V9::LDSBr, LdReturn.rid, 2, -1 }, - { V9::LDSBr, LdReturn.rid, 3, 1 }, - { V9::LDSBi, LdReturn.rid, 2, -1 }, - { V9::LDSBi, LdReturn.rid, 3, 1 }, - - { V9::LDSHr, LdReturn.rid, 2, -1 }, - { V9::LDSHr, LdReturn.rid, 3, 1 }, - { V9::LDSHi, LdReturn.rid, 2, -1 }, - { V9::LDSHi, LdReturn.rid, 3, 1 }, - - { V9::LDSWr, LdReturn.rid, 2, -1 }, - { V9::LDSWr, LdReturn.rid, 3, 1 }, - { V9::LDSWi, LdReturn.rid, 2, -1 }, - { V9::LDSWi, LdReturn.rid, 3, 1 }, - - // - // RDPR from certain registers and RD from any register are not dispatchable - // until four clocks after they reach the head of the instr. buffer. - // Together with their single-issue requirement, this means all four issue - // slots are effectively blocked for those cycles, plus the issue cycle. - // This does not increase the latency of the instruction itself. - // - { V9::RDCCR, AllIssueSlots.rid, 0, 5 }, - { V9::RDCCR, AllIssueSlots.rid, 0, 5 }, - { V9::RDCCR, AllIssueSlots.rid, 0, 5 }, - { V9::RDCCR, AllIssueSlots.rid, 0, 5 }, - -#undef EXPLICIT_BUBBLES_NEEDED -#ifdef EXPLICIT_BUBBLES_NEEDED - // - // MULScc inserts one bubble. - // This means it breaks the current group (captured in UltraSparcSchedInfo) - // *and occupies all issue slots for the next cycle - // -//{ V9::MULScc, AllIssueSlots.rid, 2, 2-1 }, -//{ V9::MULScc, AllIssueSlots.rid, 2, 2-1 }, -//{ V9::MULScc, AllIssueSlots.rid, 2, 2-1 }, -//{ V9::MULScc, AllIssueSlots.rid, 2, 2-1 }, - - // - // SMULcc inserts between 4 and 18 bubbles, depending on #leading 0s in rs1. - // We just model this with a simple average. - // -//{ V9::SMULcc, AllIssueSlots.rid, 2, ((4+18)/2)-1 }, -//{ V9::SMULcc, AllIssueSlots.rid, 2, ((4+18)/2)-1 }, -//{ V9::SMULcc, AllIssueSlots.rid, 2, ((4+18)/2)-1 }, -//{ V9::SMULcc, AllIssueSlots.rid, 2, ((4+18)/2)-1 }, - - // SMULcc inserts between 4 and 19 bubbles, depending on #leading 0s in rs1. -//{ V9::UMULcc, AllIssueSlots.rid, 2, ((4+19)/2)-1 }, -//{ V9::UMULcc, AllIssueSlots.rid, 2, ((4+19)/2)-1 }, -//{ V9::UMULcc, AllIssueSlots.rid, 2, ((4+19)/2)-1 }, -//{ V9::UMULcc, AllIssueSlots.rid, 2, ((4+19)/2)-1 }, - - // - // MULX inserts between 4 and 34 bubbles, depending on #leading 0s in rs1. - // - { V9::MULX, AllIssueSlots.rid, 2, ((4+34)/2)-1 }, - { V9::MULX, AllIssueSlots.rid, 2, ((4+34)/2)-1 }, - { V9::MULX, AllIssueSlots.rid, 2, ((4+34)/2)-1 }, - { V9::MULX, AllIssueSlots.rid, 2, ((4+34)/2)-1 }, - - // - // SDIVcc inserts 36 bubbles. - // -//{ V9::SDIVcc, AllIssueSlots.rid, 2, 36-1 }, -//{ V9::SDIVcc, AllIssueSlots.rid, 2, 36-1 }, -//{ V9::SDIVcc, AllIssueSlots.rid, 2, 36-1 }, -//{ V9::SDIVcc, AllIssueSlots.rid, 2, 36-1 }, - - // UDIVcc inserts 37 bubbles. -//{ V9::UDIVcc, AllIssueSlots.rid, 2, 37-1 }, -//{ V9::UDIVcc, AllIssueSlots.rid, 2, 37-1 }, -//{ V9::UDIVcc, AllIssueSlots.rid, 2, 37-1 }, -//{ V9::UDIVcc, AllIssueSlots.rid, 2, 37-1 }, - - // - // SDIVX inserts 68 bubbles. - // - { V9::SDIVX, AllIssueSlots.rid, 2, 68-1 }, - { V9::SDIVX, AllIssueSlots.rid, 2, 68-1 }, - { V9::SDIVX, AllIssueSlots.rid, 2, 68-1 }, - { V9::SDIVX, AllIssueSlots.rid, 2, 68-1 }, - - // - // UDIVX inserts 68 bubbles. - // - { V9::UDIVX, AllIssueSlots.rid, 2, 68-1 }, - { V9::UDIVX, AllIssueSlots.rid, 2, 68-1 }, - { V9::UDIVX, AllIssueSlots.rid, 2, 68-1 }, - { V9::UDIVX, AllIssueSlots.rid, 2, 68-1 }, - - // - // WR inserts 4 bubbles. - // -//{ V9::WR, AllIssueSlots.rid, 2, 68-1 }, -//{ V9::WR, AllIssueSlots.rid, 2, 68-1 }, -//{ V9::WR, AllIssueSlots.rid, 2, 68-1 }, -//{ V9::WR, AllIssueSlots.rid, 2, 68-1 }, - - // - // WRPR inserts 4 bubbles. - // -//{ V9::WRPR, AllIssueSlots.rid, 2, 68-1 }, -//{ V9::WRPR, AllIssueSlots.rid, 2, 68-1 }, -//{ V9::WRPR, AllIssueSlots.rid, 2, 68-1 }, -//{ V9::WRPR, AllIssueSlots.rid, 2, 68-1 }, - - // - // DONE inserts 9 bubbles. - // -//{ V9::DONE, AllIssueSlots.rid, 2, 9-1 }, -//{ V9::DONE, AllIssueSlots.rid, 2, 9-1 }, -//{ V9::DONE, AllIssueSlots.rid, 2, 9-1 }, -//{ V9::DONE, AllIssueSlots.rid, 2, 9-1 }, - - // - // RETRY inserts 9 bubbles. - // -//{ V9::RETRY, AllIssueSlots.rid, 2, 9-1 }, -//{ V9::RETRY, AllIssueSlots.rid, 2, 9-1 }, -//{ V9::RETRY, AllIssueSlots.rid, 2, 9-1 }, -//{ V9::RETRY, AllIssueSlots.rid, 2, 9-1 }, - -#endif /*EXPLICIT_BUBBLES_NEEDED */ -}; - -// Additional delays to be captured in code: -// 1. RDPR from several state registers (page 349) -// 2. RD from *any* register (page 349) -// 3. Writes to TICK, PSTATE, TL registers and FLUSH{W} instr (page 349) -// 4. Integer store can be in same group as instr producing value to store. -// 5. BICC and BPICC can be in the same group as instr producing CC (pg 350) -// 6. FMOVr cannot be in the same or next group as an IEU instr (pg 351). -// 7. The second instr. of a CTI group inserts 9 bubbles (pg 351) -// 8. WR{PR}, SVAE, SAVED, RESTORE, RESTORED, RETURN, RETRY, and DONE that -// follow an annulling branch cannot be issued in the same group or in -// the 3 groups following the branch. -// 9. A predicted annulled load does not stall dependent instructions. -// Other annulled delay slot instructions *do* stall dependents, so -// nothing special needs to be done for them during scheduling. -//10. Do not put a load use that may be annulled in the same group as the -// branch. The group will stall until the load returns. -//11. Single-prec. FP loads lock 2 registers, for dependency checking. -// -// -// Additional delays we cannot or will not capture: -// 1. If DCTI is last word of cache line, it is delayed until next line can be -// fetched. Also, other DCTI alignment-related delays (pg 352) -// 2. Load-after-store is delayed by 7 extra cycles if load hits in D-Cache. -// Also, several other store-load and load-store conflicts (pg 358) -// 3. MEMBAR, LD{X}FSR, LDD{A} and a bunch of other load stalls (pg 358) -// 4. There can be at most 8 outstanding buffered store instructions -// (including some others like MEMBAR, LDSTUB, CAS{AX}, and FLUSH) - - - -//--------------------------------------------------------------------------- -// class SparcSchedInfo -// -// Purpose: -// Scheduling information for the UltraSPARC. -// Primarily just initializes machine-dependent parameters in -// class TargetSchedInfo. -//--------------------------------------------------------------------------- - -/*ctor*/ -SparcSchedInfo::SparcSchedInfo(const TargetMachine& tgt) - : TargetSchedInfo(tgt, - (unsigned int) SPARC_NUM_SCHED_CLASSES, - SparcRUsageDesc, - SparcInstrUsageDeltas, - SparcInstrIssueDeltas, - sizeof(SparcInstrUsageDeltas)/sizeof(InstrRUsageDelta), - sizeof(SparcInstrIssueDeltas)/sizeof(InstrIssueDelta)) -{ - maxNumIssueTotal = 4; - longestIssueConflict = 0; // computed from issuesGaps[] - - branchMispredictPenalty = 4; // 4 for SPARC IIi - branchTargetUnknownPenalty = 2; // 2 for SPARC IIi - l1DCacheMissPenalty = 8; // 7 or 9 for SPARC IIi - l1ICacheMissPenalty = 8; // ? for SPARC IIi - - inOrderLoads = true; // true for SPARC IIi - inOrderIssue = true; // true for SPARC IIi - inOrderExec = false; // false for most architectures - inOrderRetire= true; // true for most architectures - - // must be called after above parameters are initialized. - initializeResources(); -} - -void -SparcSchedInfo::initializeResources() -{ - // Compute TargetSchedInfo::instrRUsages and TargetSchedInfo::issueGaps - TargetSchedInfo::initializeResources(); - - // Machine-dependent fixups go here. None for now. -} |