1 //==-- AArch64Schedule.td - AArch64 Scheduling Definitions -*- tablegen -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Define TII for use in SchedVariant Predicates.
11 // const MachineInstr *MI and const TargetSchedModel *SchedModel
12 // are defined by default.
13 def : PredicateProlog<[{
14 const AArch64InstrInfo *TII =
15 static_cast<const AArch64InstrInfo*>(SchedModel->getInstrInfo());
19 // AArch64 Scheduler Definitions
21 def WriteImm : SchedWrite; // MOVN, MOVZ
22 // TODO: Provide variants for MOV32/64imm Pseudos that dynamically
23 // select the correct sequence of WriteImms.
25 def WriteI : SchedWrite; // ALU
26 def WriteISReg : SchedWrite; // ALU of Shifted-Reg
27 def WriteIEReg : SchedWrite; // ALU of Extended-Reg
28 def ReadI : SchedRead; // ALU
29 def ReadISReg : SchedRead; // ALU of Shifted-Reg
30 def ReadIEReg : SchedRead; // ALU of Extended-Reg
31 def WriteExtr : SchedWrite; // EXTR shifts a reg pair
32 def ReadExtrHi : SchedRead; // Read the high reg of the EXTR pair
33 def WriteIS : SchedWrite; // Shift/Scale
34 def WriteID32 : SchedWrite; // 32-bit Divide
35 def WriteID64 : SchedWrite; // 64-bit Divide
36 def ReadID : SchedRead; // 32/64-bit Divide
37 def WriteIM32 : SchedWrite; // 32-bit Multiply
38 def WriteIM64 : SchedWrite; // 64-bit Multiply
39 def ReadIM : SchedRead; // 32/64-bit Multiply
40 def ReadIMA : SchedRead; // 32/64-bit Multiply Accumulate
41 def WriteBr : SchedWrite; // Branch
42 def WriteBrReg : SchedWrite; // Indirect Branch
44 def WriteLD : SchedWrite; // Load from base addr plus immediate offset
45 def WriteST : SchedWrite; // Store to base addr plus immediate offset
46 def WriteSTP : SchedWrite; // Store a register pair.
47 def WriteAdr : SchedWrite; // Address pre/post increment.
49 def WriteLDIdx : SchedWrite; // Load from a register index (maybe scaled).
50 def WriteSTIdx : SchedWrite; // Store to a register index (maybe scaled).
51 def ReadAdrBase : SchedRead; // Read the base resister of a reg-offset LD/ST.
53 // Serialized two-level address load.
55 def WriteLDAdr : WriteSequence<[WriteAdr, WriteLD]>;
57 // Serialized two-level address lookup.
58 // EXAMPLE: MOVaddr...
59 def WriteAdrAdr : WriteSequence<[WriteAdr, WriteAdr]>;
61 // The second register of a load-pair.
62 // LDP,LDPSW,LDNP,LDXP,LDAXP
63 def WriteLDHi : SchedWrite;
65 // Store-exclusive is a store followed by a dependent load.
66 def WriteSTX : WriteSequence<[WriteST, WriteLD]>;
68 def WriteSys : SchedWrite; // Long, variable latency system ops.
69 def WriteBarrier : SchedWrite; // Memory barrier.
70 def WriteHint : SchedWrite; // Hint instruction.
72 def WriteF : SchedWrite; // General floating-point ops.
73 def WriteFCmp : SchedWrite; // Floating-point compare.
74 def WriteFCvt : SchedWrite; // Float conversion.
75 def WriteFCopy : SchedWrite; // Float-int register copy.
76 def WriteFImm : SchedWrite; // Floating-point immediate.
77 def WriteFMul : SchedWrite; // Floating-point multiply.
78 def WriteFDiv : SchedWrite; // Floating-point division.
80 def WriteV : SchedWrite; // Vector ops.
81 def WriteVLD : SchedWrite; // Vector loads.
82 def WriteVST : SchedWrite; // Vector stores.
84 def WriteAtomic : SchedWrite; // Atomic memory operations (CAS, Swap, LDOP)
86 // Read the unwritten lanes of the VLD's destination registers.
87 def ReadVLD : SchedRead;
89 // Sequential vector load and shuffle.
90 def WriteVLDShuffle : WriteSequence<[WriteVLD, WriteV]>;
91 def WriteVLDPairShuffle : WriteSequence<[WriteVLD, WriteV, WriteV]>;
93 // Store a shuffled vector.
94 def WriteVSTShuffle : WriteSequence<[WriteV, WriteVST]>;
95 def WriteVSTPairShuffle : WriteSequence<[WriteV, WriteV, WriteVST]>;