| //===-- RISCVInstrInfoZa.td - RISC-V Atomic instructions ---*- tablegen -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file describes the RISC-V instructions from the standard atomic 'Za*' |
| // extensions: |
| // - Zawrs (v1.0) : Wait-on-Reservation-Set. |
| // - Zacas (v1.0-rc1) : Atomic Compare-and-Swap. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| //===----------------------------------------------------------------------===// |
| // Zacas (Atomic Compare-and-Swap) |
| //===----------------------------------------------------------------------===// |
| |
| def GPRPairRV32Operand : AsmOperandClass { |
| let Name = "GPRPairRV32"; |
| let ParserMethod = "parseGPRPair<false>"; |
| let PredicateMethod = "isGPRPair"; |
| let RenderMethod = "addRegOperands"; |
| } |
| |
| def GPRPairRV64Operand : AsmOperandClass { |
| let Name = "GPRPairRV64"; |
| let ParserMethod = "parseGPRPair<true>"; |
| let PredicateMethod = "isGPRPair"; |
| let RenderMethod = "addRegOperands"; |
| } |
| |
| def GPRPairRV32 : RegisterOperand<GPRPair> { |
| let ParserMatchClass = GPRPairRV32Operand; |
| } |
| |
| def GPRPairRV64 : RegisterOperand<GPRPair> { |
| let ParserMatchClass = GPRPairRV64Operand; |
| } |
| |
| let hasSideEffects = 0, mayLoad = 1, mayStore = 1, Constraints = "$rd = $rd_wb" in |
| class AMO_cas<bits<5> funct5, bit aq, bit rl, bits<3> funct3, string opcodestr, |
| DAGOperand RC> |
| : RVInstRAtomic<funct5, aq, rl, funct3, OPC_AMO, |
| (outs RC:$rd_wb), (ins RC:$rd, GPRMemZeroOffset:$rs1, RC:$rs2), |
| opcodestr, "$rd, $rs2, $rs1">; |
| |
| multiclass AMO_cas_aq_rl<bits<5> funct5, bits<3> funct3, string opcodestr, |
| DAGOperand RC> { |
| def "" : AMO_cas<funct5, 0, 0, funct3, opcodestr, RC>; |
| def _AQ : AMO_cas<funct5, 1, 0, funct3, opcodestr # ".aq", RC>; |
| def _RL : AMO_cas<funct5, 0, 1, funct3, opcodestr # ".rl", RC>; |
| def _AQ_RL : AMO_cas<funct5, 1, 1, funct3, opcodestr # ".aqrl", RC>; |
| } |
| |
| let Predicates = [HasStdExtZacas] in { |
| defm AMOCAS_W : AMO_cas_aq_rl<0b00101, 0b010, "amocas.w", GPR>; |
| } // Predicates = [HasStdExtZacas] |
| |
| let Predicates = [HasStdExtZacas, IsRV32], DecoderNamespace = "RV32Zacas" in { |
| defm AMOCAS_D_RV32 : AMO_cas_aq_rl<0b00101, 0b011, "amocas.d", GPRPairRV32>; |
| } // Predicates = [HasStdExtZacas, IsRV32] |
| |
| let Predicates = [HasStdExtZacas, IsRV64] in { |
| defm AMOCAS_D_RV64 : AMO_cas_aq_rl<0b00101, 0b011, "amocas.d", GPR>; |
| defm AMOCAS_Q : AMO_cas_aq_rl<0b00101, 0b100, "amocas.q", GPRPairRV64>; |
| } // Predicates = [HasStdExtZacas, IsRV64] |
| |
| multiclass AMOCASPat<string AtomicOp, string BaseInst, ValueType vt = XLenVT, |
| list<Predicate> ExtraPreds = []> { |
| let Predicates = !listconcat([HasStdExtZacas, NotHasStdExtZtso], ExtraPreds) in { |
| def : Pat<(!cast<PatFrag>(AtomicOp#"_monotonic") (vt GPR:$addr), |
| (vt GPR:$cmp), |
| (vt GPR:$new)), |
| (!cast<RVInst>(BaseInst) GPR:$cmp, GPR:$addr, GPR:$new)>; |
| def : Pat<(!cast<PatFrag>(AtomicOp#"_acquire") (vt GPR:$addr), |
| (vt GPR:$cmp), |
| (vt GPR:$new)), |
| (!cast<RVInst>(BaseInst#"_AQ") GPR:$cmp, GPR:$addr, GPR:$new)>; |
| def : Pat<(!cast<PatFrag>(AtomicOp#"_release") (vt GPR:$addr), |
| (vt GPR:$cmp), |
| (vt GPR:$new)), |
| (!cast<RVInst>(BaseInst#"_RL") GPR:$cmp, GPR:$addr, GPR:$new)>; |
| def : Pat<(!cast<PatFrag>(AtomicOp#"_acq_rel") (vt GPR:$addr), |
| (vt GPR:$cmp), |
| (vt GPR:$new)), |
| (!cast<RVInst>(BaseInst#"_AQ_RL") GPR:$cmp, GPR:$addr, GPR:$new)>; |
| def : Pat<(!cast<PatFrag>(AtomicOp#"_seq_cst") (vt GPR:$addr), |
| (vt GPR:$cmp), |
| (vt GPR:$new)), |
| (!cast<RVInst>(BaseInst#"_AQ_RL") GPR:$cmp, GPR:$addr, GPR:$new)>; |
| } // Predicates = !listconcat([HasStdExtZacas, NotHasStdExtZtso], ExtraPreds) |
| let Predicates = !listconcat([HasStdExtZacas, HasStdExtZtso], ExtraPreds) in { |
| def : Pat<(!cast<PatFrag>(AtomicOp#"_monotonic") (vt GPR:$addr), |
| (vt GPR:$cmp), |
| (vt GPR:$new)), |
| (!cast<RVInst>(BaseInst) GPR:$cmp, GPR:$addr, GPR:$new)>; |
| def : Pat<(!cast<PatFrag>(AtomicOp#"_acquire") (vt GPR:$addr), |
| (vt GPR:$cmp), |
| (vt GPR:$new)), |
| (!cast<RVInst>(BaseInst) GPR:$cmp, GPR:$addr, GPR:$new)>; |
| def : Pat<(!cast<PatFrag>(AtomicOp#"_release") (vt GPR:$addr), |
| (vt GPR:$cmp), |
| (vt GPR:$new)), |
| (!cast<RVInst>(BaseInst) GPR:$cmp, GPR:$addr, GPR:$new)>; |
| def : Pat<(!cast<PatFrag>(AtomicOp#"_acq_rel") (vt GPR:$addr), |
| (vt GPR:$cmp), |
| (vt GPR:$new)), |
| (!cast<RVInst>(BaseInst) GPR:$cmp, GPR:$addr, GPR:$new)>; |
| def : Pat<(!cast<PatFrag>(AtomicOp#"_seq_cst") (vt GPR:$addr), |
| (vt GPR:$cmp), |
| (vt GPR:$new)), |
| (!cast<RVInst>(BaseInst) GPR:$cmp, GPR:$addr, GPR:$new)>; |
| } // Predicates = !listconcat([HasStdExtZacas, HasStdExtZtso], ExtraPreds) |
| } |
| |
| defm : AMOCASPat<"atomic_cmp_swap_32", "AMOCAS_W">; |
| defm : AMOCASPat<"atomic_cmp_swap_64", "AMOCAS_D_RV64", i64, [IsRV64]>; |
| |
| //===----------------------------------------------------------------------===// |
| // Zawrs (Wait-on-Reservation-Set) |
| //===----------------------------------------------------------------------===// |
| |
| let hasSideEffects = 1, mayLoad = 0, mayStore = 0 in |
| class WRSInst<bits<12> funct12, string opcodestr> |
| : RVInstI<0b000, OPC_SYSTEM, (outs), (ins), opcodestr, ""> { |
| let rs1 = 0; |
| let rd = 0; |
| let imm12 = funct12; |
| } |
| |
| let Predicates = [HasStdExtZawrs] in { |
| def WRS_NTO : WRSInst<0b000000001101, "wrs.nto">, Sched<[]>; |
| def WRS_STO : WRSInst<0b000000011101, "wrs.sto">, Sched<[]>; |
| } // Predicates = [HasStdExtZawrs] |
