| // Copyright 2022 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package loong64 |
| |
| import ( |
| "math" |
| |
| "cmd/compile/internal/base" |
| "cmd/compile/internal/ir" |
| "cmd/compile/internal/logopt" |
| "cmd/compile/internal/objw" |
| "cmd/compile/internal/ssa" |
| "cmd/compile/internal/ssagen" |
| "cmd/compile/internal/types" |
| "cmd/internal/obj" |
| "cmd/internal/obj/loong64" |
| ) |
| |
| // isFPreg reports whether r is an FP register. |
| func isFPreg(r int16) bool { |
| return loong64.REG_F0 <= r && r <= loong64.REG_F31 |
| } |
| |
| // loadByType returns the load instruction of the given type. |
| func loadByType(t *types.Type, r int16) obj.As { |
| if isFPreg(r) { |
| if t.Size() == 4 { |
| return loong64.AMOVF |
| } else { |
| return loong64.AMOVD |
| } |
| } else { |
| switch t.Size() { |
| case 1: |
| if t.IsSigned() { |
| return loong64.AMOVB |
| } else { |
| return loong64.AMOVBU |
| } |
| case 2: |
| if t.IsSigned() { |
| return loong64.AMOVH |
| } else { |
| return loong64.AMOVHU |
| } |
| case 4: |
| if t.IsSigned() { |
| return loong64.AMOVW |
| } else { |
| return loong64.AMOVWU |
| } |
| case 8: |
| return loong64.AMOVV |
| } |
| } |
| panic("bad load type") |
| } |
| |
| // storeByType returns the store instruction of the given type. |
| func storeByType(t *types.Type, r int16) obj.As { |
| if isFPreg(r) { |
| if t.Size() == 4 { |
| return loong64.AMOVF |
| } else { |
| return loong64.AMOVD |
| } |
| } else { |
| switch t.Size() { |
| case 1: |
| return loong64.AMOVB |
| case 2: |
| return loong64.AMOVH |
| case 4: |
| return loong64.AMOVW |
| case 8: |
| return loong64.AMOVV |
| } |
| } |
| panic("bad store type") |
| } |
| |
| // largestMove returns the largest move instruction possible and its size, |
| // given the alignment of the total size of the move. |
| // |
| // e.g., a 16-byte move may use MOVV, but an 11-byte move must use MOVB. |
| // |
| // Note that the moves may not be on naturally aligned addresses depending on |
| // the source and destination. |
| // |
| // This matches the calculation in ssa.moveSize. |
| func largestMove(alignment int64) (obj.As, int64) { |
| switch { |
| case alignment%8 == 0: |
| return loong64.AMOVV, 8 |
| case alignment%4 == 0: |
| return loong64.AMOVW, 4 |
| case alignment%2 == 0: |
| return loong64.AMOVH, 2 |
| default: |
| return loong64.AMOVB, 1 |
| } |
| } |
| |
| func ssaGenValue(s *ssagen.State, v *ssa.Value) { |
| switch v.Op { |
| case ssa.OpCopy, ssa.OpLOONG64MOVVreg: |
| if v.Type.IsMemory() { |
| return |
| } |
| x := v.Args[0].Reg() |
| y := v.Reg() |
| if x == y { |
| return |
| } |
| as := loong64.AMOVV |
| if isFPreg(x) && isFPreg(y) { |
| as = loong64.AMOVD |
| } |
| p := s.Prog(as) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = x |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = y |
| case ssa.OpLOONG64MOVVnop: |
| // nothing to do |
| case ssa.OpLoadReg: |
| if v.Type.IsFlags() { |
| v.Fatalf("load flags not implemented: %v", v.LongString()) |
| return |
| } |
| r := v.Reg() |
| p := s.Prog(loadByType(v.Type, r)) |
| ssagen.AddrAuto(&p.From, v.Args[0]) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = r |
| case ssa.OpStoreReg: |
| if v.Type.IsFlags() { |
| v.Fatalf("store flags not implemented: %v", v.LongString()) |
| return |
| } |
| r := v.Args[0].Reg() |
| p := s.Prog(storeByType(v.Type, r)) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = r |
| ssagen.AddrAuto(&p.To, v) |
| case ssa.OpArgIntReg, ssa.OpArgFloatReg: |
| // The assembler needs to wrap the entry safepoint/stack growth code with spill/unspill |
| // The loop only runs once. |
| for _, a := range v.Block.Func.RegArgs { |
| // Pass the spill/unspill information along to the assembler, offset by size of |
| // the saved LR slot. |
| addr := ssagen.SpillSlotAddr(a, loong64.REGSP, base.Ctxt.Arch.FixedFrameSize) |
| s.FuncInfo().AddSpill( |
| obj.RegSpill{Reg: a.Reg, Addr: addr, Unspill: loadByType(a.Type, a.Reg), Spill: storeByType(a.Type, a.Reg)}) |
| } |
| v.Block.Func.RegArgs = nil |
| ssagen.CheckArgReg(v) |
| case ssa.OpLOONG64ADDV, |
| ssa.OpLOONG64SUBV, |
| ssa.OpLOONG64AND, |
| ssa.OpLOONG64OR, |
| ssa.OpLOONG64XOR, |
| ssa.OpLOONG64NOR, |
| ssa.OpLOONG64SLLV, |
| ssa.OpLOONG64SRLV, |
| ssa.OpLOONG64SRAV, |
| ssa.OpLOONG64ROTR, |
| ssa.OpLOONG64ROTRV, |
| ssa.OpLOONG64ADDF, |
| ssa.OpLOONG64ADDD, |
| ssa.OpLOONG64SUBF, |
| ssa.OpLOONG64SUBD, |
| ssa.OpLOONG64MULF, |
| ssa.OpLOONG64MULD, |
| ssa.OpLOONG64DIVF, |
| ssa.OpLOONG64DIVD, |
| ssa.OpLOONG64MULV, ssa.OpLOONG64MULHV, ssa.OpLOONG64MULHVU, |
| ssa.OpLOONG64DIVV, ssa.OpLOONG64REMV, ssa.OpLOONG64DIVVU, ssa.OpLOONG64REMVU: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[1].Reg() |
| p.Reg = v.Args[0].Reg() |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| case ssa.OpLOONG64SGT, |
| ssa.OpLOONG64SGTU: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[0].Reg() |
| p.Reg = v.Args[1].Reg() |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| case ssa.OpLOONG64ADDVconst, |
| ssa.OpLOONG64SUBVconst, |
| ssa.OpLOONG64ANDconst, |
| ssa.OpLOONG64ORconst, |
| ssa.OpLOONG64XORconst, |
| ssa.OpLOONG64NORconst, |
| ssa.OpLOONG64SLLVconst, |
| ssa.OpLOONG64SRLVconst, |
| ssa.OpLOONG64SRAVconst, |
| ssa.OpLOONG64ROTRconst, |
| ssa.OpLOONG64ROTRVconst, |
| ssa.OpLOONG64SGTconst, |
| ssa.OpLOONG64SGTUconst: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = v.AuxInt |
| p.Reg = v.Args[0].Reg() |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| case ssa.OpLOONG64MOVVconst: |
| r := v.Reg() |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = v.AuxInt |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = r |
| if isFPreg(r) { |
| // cannot move into FP or special registers, use TMP as intermediate |
| p.To.Reg = loong64.REGTMP |
| p = s.Prog(loong64.AMOVV) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = loong64.REGTMP |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = r |
| } |
| case ssa.OpLOONG64MOVFconst, |
| ssa.OpLOONG64MOVDconst: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_FCONST |
| p.From.Val = math.Float64frombits(uint64(v.AuxInt)) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| case ssa.OpLOONG64CMPEQF, |
| ssa.OpLOONG64CMPEQD, |
| ssa.OpLOONG64CMPGEF, |
| ssa.OpLOONG64CMPGED, |
| ssa.OpLOONG64CMPGTF, |
| ssa.OpLOONG64CMPGTD: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[0].Reg() |
| p.Reg = v.Args[1].Reg() |
| case ssa.OpLOONG64MOVVaddr: |
| p := s.Prog(loong64.AMOVV) |
| p.From.Type = obj.TYPE_ADDR |
| p.From.Reg = v.Args[0].Reg() |
| var wantreg string |
| // MOVV $sym+off(base), R |
| // the assembler expands it as the following: |
| // - base is SP: add constant offset to SP (R3) |
| // when constant is large, tmp register (R30) may be used |
| // - base is SB: load external address with relocation |
| switch v.Aux.(type) { |
| default: |
| v.Fatalf("aux is of unknown type %T", v.Aux) |
| case *obj.LSym: |
| wantreg = "SB" |
| ssagen.AddAux(&p.From, v) |
| case *ir.Name: |
| wantreg = "SP" |
| ssagen.AddAux(&p.From, v) |
| case nil: |
| // No sym, just MOVV $off(SP), R |
| wantreg = "SP" |
| p.From.Offset = v.AuxInt |
| } |
| if reg := v.Args[0].RegName(); reg != wantreg { |
| v.Fatalf("bad reg %s for symbol type %T, want %s", reg, v.Aux, wantreg) |
| } |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| case ssa.OpLOONG64MOVBload, |
| ssa.OpLOONG64MOVBUload, |
| ssa.OpLOONG64MOVHload, |
| ssa.OpLOONG64MOVHUload, |
| ssa.OpLOONG64MOVWload, |
| ssa.OpLOONG64MOVWUload, |
| ssa.OpLOONG64MOVVload, |
| ssa.OpLOONG64MOVFload, |
| ssa.OpLOONG64MOVDload: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = v.Args[0].Reg() |
| ssagen.AddAux(&p.From, v) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| case ssa.OpLOONG64MOVBstore, |
| ssa.OpLOONG64MOVHstore, |
| ssa.OpLOONG64MOVWstore, |
| ssa.OpLOONG64MOVVstore, |
| ssa.OpLOONG64MOVFstore, |
| ssa.OpLOONG64MOVDstore: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[1].Reg() |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| ssagen.AddAux(&p.To, v) |
| case ssa.OpLOONG64MOVBstorezero, |
| ssa.OpLOONG64MOVHstorezero, |
| ssa.OpLOONG64MOVWstorezero, |
| ssa.OpLOONG64MOVVstorezero: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = loong64.REGZERO |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| ssagen.AddAux(&p.To, v) |
| case ssa.OpLOONG64MOVBreg, |
| ssa.OpLOONG64MOVBUreg, |
| ssa.OpLOONG64MOVHreg, |
| ssa.OpLOONG64MOVHUreg, |
| ssa.OpLOONG64MOVWreg, |
| ssa.OpLOONG64MOVWUreg: |
| a := v.Args[0] |
| for a.Op == ssa.OpCopy || a.Op == ssa.OpLOONG64MOVVreg { |
| a = a.Args[0] |
| } |
| if a.Op == ssa.OpLoadReg && loong64.REG_R0 <= a.Reg() && a.Reg() <= loong64.REG_R31 { |
| // LoadReg from a narrower type does an extension, except loading |
| // to a floating point register. So only eliminate the extension |
| // if it is loaded to an integer register. |
| |
| t := a.Type |
| switch { |
| case v.Op == ssa.OpLOONG64MOVBreg && t.Size() == 1 && t.IsSigned(), |
| v.Op == ssa.OpLOONG64MOVBUreg && t.Size() == 1 && !t.IsSigned(), |
| v.Op == ssa.OpLOONG64MOVHreg && t.Size() == 2 && t.IsSigned(), |
| v.Op == ssa.OpLOONG64MOVHUreg && t.Size() == 2 && !t.IsSigned(), |
| v.Op == ssa.OpLOONG64MOVWreg && t.Size() == 4 && t.IsSigned(), |
| v.Op == ssa.OpLOONG64MOVWUreg && t.Size() == 4 && !t.IsSigned(): |
| // arg is a proper-typed load, already zero/sign-extended, don't extend again |
| if v.Reg() == v.Args[0].Reg() { |
| return |
| } |
| p := s.Prog(loong64.AMOVV) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[0].Reg() |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| return |
| default: |
| } |
| } |
| fallthrough |
| case ssa.OpLOONG64MOVWF, |
| ssa.OpLOONG64MOVWD, |
| ssa.OpLOONG64TRUNCFW, |
| ssa.OpLOONG64TRUNCDW, |
| ssa.OpLOONG64MOVVF, |
| ssa.OpLOONG64MOVVD, |
| ssa.OpLOONG64TRUNCFV, |
| ssa.OpLOONG64TRUNCDV, |
| ssa.OpLOONG64MOVFD, |
| ssa.OpLOONG64MOVDF, |
| ssa.OpLOONG64NEGF, |
| ssa.OpLOONG64NEGD, |
| ssa.OpLOONG64SQRTD, |
| ssa.OpLOONG64SQRTF: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[0].Reg() |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| case ssa.OpLOONG64NEGV: |
| // SUB from REGZERO |
| p := s.Prog(loong64.ASUBVU) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[0].Reg() |
| p.Reg = loong64.REGZERO |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| case ssa.OpLOONG64DUFFZERO: |
| // runtime.duffzero expects start address in R20 |
| p := s.Prog(obj.ADUFFZERO) |
| p.To.Type = obj.TYPE_MEM |
| p.To.Name = obj.NAME_EXTERN |
| p.To.Sym = ir.Syms.Duffzero |
| p.To.Offset = v.AuxInt |
| case ssa.OpLOONG64LoweredZero: |
| // MOVx R0, (Rarg0) |
| // ADDV $sz, Rarg0 |
| // BGEU Rarg1, Rarg0, -2(PC) |
| mov, sz := largestMove(v.AuxInt) |
| p := s.Prog(mov) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = loong64.REGZERO |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| |
| p2 := s.Prog(loong64.AADDVU) |
| p2.From.Type = obj.TYPE_CONST |
| p2.From.Offset = sz |
| p2.To.Type = obj.TYPE_REG |
| p2.To.Reg = v.Args[0].Reg() |
| |
| p3 := s.Prog(loong64.ABGEU) |
| p3.From.Type = obj.TYPE_REG |
| p3.From.Reg = v.Args[1].Reg() |
| p3.Reg = v.Args[0].Reg() |
| p3.To.Type = obj.TYPE_BRANCH |
| p3.To.SetTarget(p) |
| |
| case ssa.OpLOONG64DUFFCOPY: |
| p := s.Prog(obj.ADUFFCOPY) |
| p.To.Type = obj.TYPE_MEM |
| p.To.Name = obj.NAME_EXTERN |
| p.To.Sym = ir.Syms.Duffcopy |
| p.To.Offset = v.AuxInt |
| case ssa.OpLOONG64LoweredMove: |
| // MOVx (Rarg1), Rtmp |
| // MOVx Rtmp, (Rarg0) |
| // ADDV $sz, Rarg1 |
| // ADDV $sz, Rarg0 |
| // BGEU Rarg2, Rarg0, -4(PC) |
| mov, sz := largestMove(v.AuxInt) |
| p := s.Prog(mov) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = v.Args[1].Reg() |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = loong64.REGTMP |
| |
| p2 := s.Prog(mov) |
| p2.From.Type = obj.TYPE_REG |
| p2.From.Reg = loong64.REGTMP |
| p2.To.Type = obj.TYPE_MEM |
| p2.To.Reg = v.Args[0].Reg() |
| |
| p3 := s.Prog(loong64.AADDVU) |
| p3.From.Type = obj.TYPE_CONST |
| p3.From.Offset = sz |
| p3.To.Type = obj.TYPE_REG |
| p3.To.Reg = v.Args[1].Reg() |
| |
| p4 := s.Prog(loong64.AADDVU) |
| p4.From.Type = obj.TYPE_CONST |
| p4.From.Offset = sz |
| p4.To.Type = obj.TYPE_REG |
| p4.To.Reg = v.Args[0].Reg() |
| |
| p5 := s.Prog(loong64.ABGEU) |
| p5.From.Type = obj.TYPE_REG |
| p5.From.Reg = v.Args[2].Reg() |
| p5.Reg = v.Args[1].Reg() |
| p5.To.Type = obj.TYPE_BRANCH |
| p5.To.SetTarget(p) |
| |
| case ssa.OpLOONG64CALLstatic, ssa.OpLOONG64CALLclosure, ssa.OpLOONG64CALLinter: |
| s.Call(v) |
| case ssa.OpLOONG64CALLtail: |
| s.TailCall(v) |
| case ssa.OpLOONG64LoweredWB: |
| p := s.Prog(obj.ACALL) |
| p.To.Type = obj.TYPE_MEM |
| p.To.Name = obj.NAME_EXTERN |
| // AuxInt encodes how many buffer entries we need. |
| p.To.Sym = ir.Syms.GCWriteBarrier[v.AuxInt-1] |
| case ssa.OpLOONG64LoweredPanicBoundsA, ssa.OpLOONG64LoweredPanicBoundsB, ssa.OpLOONG64LoweredPanicBoundsC: |
| p := s.Prog(obj.ACALL) |
| p.To.Type = obj.TYPE_MEM |
| p.To.Name = obj.NAME_EXTERN |
| p.To.Sym = ssagen.BoundsCheckFunc[v.AuxInt] |
| s.UseArgs(16) // space used in callee args area by assembly stubs |
| case ssa.OpLOONG64LoweredAtomicLoad8, ssa.OpLOONG64LoweredAtomicLoad32, ssa.OpLOONG64LoweredAtomicLoad64: |
| as := loong64.AMOVV |
| switch v.Op { |
| case ssa.OpLOONG64LoweredAtomicLoad8: |
| as = loong64.AMOVB |
| case ssa.OpLOONG64LoweredAtomicLoad32: |
| as = loong64.AMOVW |
| } |
| s.Prog(loong64.ADBAR) |
| p := s.Prog(as) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = v.Args[0].Reg() |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg0() |
| s.Prog(loong64.ADBAR) |
| case ssa.OpLOONG64LoweredAtomicStore8, ssa.OpLOONG64LoweredAtomicStore32, ssa.OpLOONG64LoweredAtomicStore64: |
| as := loong64.AMOVV |
| switch v.Op { |
| case ssa.OpLOONG64LoweredAtomicStore8: |
| as = loong64.AMOVB |
| case ssa.OpLOONG64LoweredAtomicStore32: |
| as = loong64.AMOVW |
| } |
| s.Prog(loong64.ADBAR) |
| p := s.Prog(as) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[1].Reg() |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| s.Prog(loong64.ADBAR) |
| case ssa.OpLOONG64LoweredAtomicStorezero32, ssa.OpLOONG64LoweredAtomicStorezero64: |
| as := loong64.AMOVV |
| if v.Op == ssa.OpLOONG64LoweredAtomicStorezero32 { |
| as = loong64.AMOVW |
| } |
| s.Prog(loong64.ADBAR) |
| p := s.Prog(as) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = loong64.REGZERO |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| s.Prog(loong64.ADBAR) |
| case ssa.OpLOONG64LoweredAtomicExchange32, ssa.OpLOONG64LoweredAtomicExchange64: |
| // DBAR |
| // MOVV Rarg1, Rtmp |
| // LL (Rarg0), Rout |
| // SC Rtmp, (Rarg0) |
| // BEQ Rtmp, -3(PC) |
| // DBAR |
| ll := loong64.ALLV |
| sc := loong64.ASCV |
| if v.Op == ssa.OpLOONG64LoweredAtomicExchange32 { |
| ll = loong64.ALL |
| sc = loong64.ASC |
| } |
| s.Prog(loong64.ADBAR) |
| p := s.Prog(loong64.AMOVV) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[1].Reg() |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = loong64.REGTMP |
| p1 := s.Prog(ll) |
| p1.From.Type = obj.TYPE_MEM |
| p1.From.Reg = v.Args[0].Reg() |
| p1.To.Type = obj.TYPE_REG |
| p1.To.Reg = v.Reg0() |
| p2 := s.Prog(sc) |
| p2.From.Type = obj.TYPE_REG |
| p2.From.Reg = loong64.REGTMP |
| p2.To.Type = obj.TYPE_MEM |
| p2.To.Reg = v.Args[0].Reg() |
| p3 := s.Prog(loong64.ABEQ) |
| p3.From.Type = obj.TYPE_REG |
| p3.From.Reg = loong64.REGTMP |
| p3.To.Type = obj.TYPE_BRANCH |
| p3.To.SetTarget(p) |
| s.Prog(loong64.ADBAR) |
| case ssa.OpLOONG64LoweredAtomicAdd32, ssa.OpLOONG64LoweredAtomicAdd64: |
| // DBAR |
| // LL (Rarg0), Rout |
| // ADDV Rarg1, Rout, Rtmp |
| // SC Rtmp, (Rarg0) |
| // BEQ Rtmp, -3(PC) |
| // DBAR |
| // ADDV Rarg1, Rout |
| ll := loong64.ALLV |
| sc := loong64.ASCV |
| if v.Op == ssa.OpLOONG64LoweredAtomicAdd32 { |
| ll = loong64.ALL |
| sc = loong64.ASC |
| } |
| s.Prog(loong64.ADBAR) |
| p := s.Prog(ll) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = v.Args[0].Reg() |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg0() |
| p1 := s.Prog(loong64.AADDVU) |
| p1.From.Type = obj.TYPE_REG |
| p1.From.Reg = v.Args[1].Reg() |
| p1.Reg = v.Reg0() |
| p1.To.Type = obj.TYPE_REG |
| p1.To.Reg = loong64.REGTMP |
| p2 := s.Prog(sc) |
| p2.From.Type = obj.TYPE_REG |
| p2.From.Reg = loong64.REGTMP |
| p2.To.Type = obj.TYPE_MEM |
| p2.To.Reg = v.Args[0].Reg() |
| p3 := s.Prog(loong64.ABEQ) |
| p3.From.Type = obj.TYPE_REG |
| p3.From.Reg = loong64.REGTMP |
| p3.To.Type = obj.TYPE_BRANCH |
| p3.To.SetTarget(p) |
| s.Prog(loong64.ADBAR) |
| p4 := s.Prog(loong64.AADDVU) |
| p4.From.Type = obj.TYPE_REG |
| p4.From.Reg = v.Args[1].Reg() |
| p4.Reg = v.Reg0() |
| p4.To.Type = obj.TYPE_REG |
| p4.To.Reg = v.Reg0() |
| case ssa.OpLOONG64LoweredAtomicAddconst32, ssa.OpLOONG64LoweredAtomicAddconst64: |
| // DBAR |
| // LL (Rarg0), Rout |
| // ADDV $auxint, Rout, Rtmp |
| // SC Rtmp, (Rarg0) |
| // BEQ Rtmp, -3(PC) |
| // DBAR |
| // ADDV $auxint, Rout |
| ll := loong64.ALLV |
| sc := loong64.ASCV |
| if v.Op == ssa.OpLOONG64LoweredAtomicAddconst32 { |
| ll = loong64.ALL |
| sc = loong64.ASC |
| } |
| s.Prog(loong64.ADBAR) |
| p := s.Prog(ll) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = v.Args[0].Reg() |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg0() |
| p1 := s.Prog(loong64.AADDVU) |
| p1.From.Type = obj.TYPE_CONST |
| p1.From.Offset = v.AuxInt |
| p1.Reg = v.Reg0() |
| p1.To.Type = obj.TYPE_REG |
| p1.To.Reg = loong64.REGTMP |
| p2 := s.Prog(sc) |
| p2.From.Type = obj.TYPE_REG |
| p2.From.Reg = loong64.REGTMP |
| p2.To.Type = obj.TYPE_MEM |
| p2.To.Reg = v.Args[0].Reg() |
| p3 := s.Prog(loong64.ABEQ) |
| p3.From.Type = obj.TYPE_REG |
| p3.From.Reg = loong64.REGTMP |
| p3.To.Type = obj.TYPE_BRANCH |
| p3.To.SetTarget(p) |
| s.Prog(loong64.ADBAR) |
| p4 := s.Prog(loong64.AADDVU) |
| p4.From.Type = obj.TYPE_CONST |
| p4.From.Offset = v.AuxInt |
| p4.Reg = v.Reg0() |
| p4.To.Type = obj.TYPE_REG |
| p4.To.Reg = v.Reg0() |
| case ssa.OpLOONG64LoweredAtomicCas32, ssa.OpLOONG64LoweredAtomicCas64: |
| // MOVV $0, Rout |
| // DBAR |
| // LL (Rarg0), Rtmp |
| // BNE Rtmp, Rarg1, 4(PC) |
| // MOVV Rarg2, Rout |
| // SC Rout, (Rarg0) |
| // BEQ Rout, -4(PC) |
| // DBAR |
| ll := loong64.ALLV |
| sc := loong64.ASCV |
| if v.Op == ssa.OpLOONG64LoweredAtomicCas32 { |
| ll = loong64.ALL |
| sc = loong64.ASC |
| } |
| p := s.Prog(loong64.AMOVV) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = loong64.REGZERO |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg0() |
| s.Prog(loong64.ADBAR) |
| p1 := s.Prog(ll) |
| p1.From.Type = obj.TYPE_MEM |
| p1.From.Reg = v.Args[0].Reg() |
| p1.To.Type = obj.TYPE_REG |
| p1.To.Reg = loong64.REGTMP |
| p2 := s.Prog(loong64.ABNE) |
| p2.From.Type = obj.TYPE_REG |
| p2.From.Reg = v.Args[1].Reg() |
| p2.Reg = loong64.REGTMP |
| p2.To.Type = obj.TYPE_BRANCH |
| p3 := s.Prog(loong64.AMOVV) |
| p3.From.Type = obj.TYPE_REG |
| p3.From.Reg = v.Args[2].Reg() |
| p3.To.Type = obj.TYPE_REG |
| p3.To.Reg = v.Reg0() |
| p4 := s.Prog(sc) |
| p4.From.Type = obj.TYPE_REG |
| p4.From.Reg = v.Reg0() |
| p4.To.Type = obj.TYPE_MEM |
| p4.To.Reg = v.Args[0].Reg() |
| p5 := s.Prog(loong64.ABEQ) |
| p5.From.Type = obj.TYPE_REG |
| p5.From.Reg = v.Reg0() |
| p5.To.Type = obj.TYPE_BRANCH |
| p5.To.SetTarget(p1) |
| p6 := s.Prog(loong64.ADBAR) |
| p2.To.SetTarget(p6) |
| case ssa.OpLOONG64LoweredNilCheck: |
| // Issue a load which will fault if arg is nil. |
| p := s.Prog(loong64.AMOVB) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = v.Args[0].Reg() |
| ssagen.AddAux(&p.From, v) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = loong64.REGTMP |
| if logopt.Enabled() { |
| logopt.LogOpt(v.Pos, "nilcheck", "genssa", v.Block.Func.Name) |
| } |
| if base.Debug.Nil != 0 && v.Pos.Line() > 1 { // v.Pos.Line()==1 in generated wrappers |
| base.WarnfAt(v.Pos, "generated nil check") |
| } |
| case ssa.OpLOONG64FPFlagTrue, |
| ssa.OpLOONG64FPFlagFalse: |
| // MOVV $0, r |
| // BFPF 2(PC) |
| // MOVV $1, r |
| branch := loong64.ABFPF |
| if v.Op == ssa.OpLOONG64FPFlagFalse { |
| branch = loong64.ABFPT |
| } |
| p := s.Prog(loong64.AMOVV) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = loong64.REGZERO |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| p2 := s.Prog(branch) |
| p2.To.Type = obj.TYPE_BRANCH |
| p3 := s.Prog(loong64.AMOVV) |
| p3.From.Type = obj.TYPE_CONST |
| p3.From.Offset = 1 |
| p3.To.Type = obj.TYPE_REG |
| p3.To.Reg = v.Reg() |
| p4 := s.Prog(obj.ANOP) // not a machine instruction, for branch to land |
| p2.To.SetTarget(p4) |
| case ssa.OpLOONG64LoweredGetClosurePtr: |
| // Closure pointer is R22 (loong64.REGCTXT). |
| ssagen.CheckLoweredGetClosurePtr(v) |
| case ssa.OpLOONG64LoweredGetCallerSP: |
| // caller's SP is FixedFrameSize below the address of the first arg |
| p := s.Prog(loong64.AMOVV) |
| p.From.Type = obj.TYPE_ADDR |
| p.From.Offset = -base.Ctxt.Arch.FixedFrameSize |
| p.From.Name = obj.NAME_PARAM |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| case ssa.OpLOONG64LoweredGetCallerPC: |
| p := s.Prog(obj.AGETCALLERPC) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| case ssa.OpLOONG64MASKEQZ, ssa.OpLOONG64MASKNEZ: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[1].Reg() |
| p.Reg = v.Args[0].Reg() |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| case ssa.OpClobber, ssa.OpClobberReg: |
| // TODO: implement for clobberdead experiment. Nop is ok for now. |
| default: |
| v.Fatalf("genValue not implemented: %s", v.LongString()) |
| } |
| } |
| |
| var blockJump = map[ssa.BlockKind]struct { |
| asm, invasm obj.As |
| }{ |
| ssa.BlockLOONG64EQ: {loong64.ABEQ, loong64.ABNE}, |
| ssa.BlockLOONG64NE: {loong64.ABNE, loong64.ABEQ}, |
| ssa.BlockLOONG64LTZ: {loong64.ABLTZ, loong64.ABGEZ}, |
| ssa.BlockLOONG64GEZ: {loong64.ABGEZ, loong64.ABLTZ}, |
| ssa.BlockLOONG64LEZ: {loong64.ABLEZ, loong64.ABGTZ}, |
| ssa.BlockLOONG64GTZ: {loong64.ABGTZ, loong64.ABLEZ}, |
| ssa.BlockLOONG64FPT: {loong64.ABFPT, loong64.ABFPF}, |
| ssa.BlockLOONG64FPF: {loong64.ABFPF, loong64.ABFPT}, |
| } |
| |
| func ssaGenBlock(s *ssagen.State, b, next *ssa.Block) { |
| switch b.Kind { |
| case ssa.BlockPlain: |
| if b.Succs[0].Block() != next { |
| p := s.Prog(obj.AJMP) |
| p.To.Type = obj.TYPE_BRANCH |
| s.Branches = append(s.Branches, ssagen.Branch{P: p, B: b.Succs[0].Block()}) |
| } |
| case ssa.BlockDefer: |
| // defer returns in R19: |
| // 0 if we should continue executing |
| // 1 if we should jump to deferreturn call |
| p := s.Prog(loong64.ABNE) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = loong64.REGZERO |
| p.Reg = loong64.REG_R19 |
| p.To.Type = obj.TYPE_BRANCH |
| s.Branches = append(s.Branches, ssagen.Branch{P: p, B: b.Succs[1].Block()}) |
| if b.Succs[0].Block() != next { |
| p := s.Prog(obj.AJMP) |
| p.To.Type = obj.TYPE_BRANCH |
| s.Branches = append(s.Branches, ssagen.Branch{P: p, B: b.Succs[0].Block()}) |
| } |
| case ssa.BlockExit, ssa.BlockRetJmp: |
| case ssa.BlockRet: |
| s.Prog(obj.ARET) |
| case ssa.BlockLOONG64EQ, ssa.BlockLOONG64NE, |
| ssa.BlockLOONG64LTZ, ssa.BlockLOONG64GEZ, |
| ssa.BlockLOONG64LEZ, ssa.BlockLOONG64GTZ, |
| ssa.BlockLOONG64FPT, ssa.BlockLOONG64FPF: |
| jmp := blockJump[b.Kind] |
| var p *obj.Prog |
| switch next { |
| case b.Succs[0].Block(): |
| p = s.Br(jmp.invasm, b.Succs[1].Block()) |
| case b.Succs[1].Block(): |
| p = s.Br(jmp.asm, b.Succs[0].Block()) |
| default: |
| if b.Likely != ssa.BranchUnlikely { |
| p = s.Br(jmp.asm, b.Succs[0].Block()) |
| s.Br(obj.AJMP, b.Succs[1].Block()) |
| } else { |
| p = s.Br(jmp.invasm, b.Succs[1].Block()) |
| s.Br(obj.AJMP, b.Succs[0].Block()) |
| } |
| } |
| if !b.Controls[0].Type.IsFlags() { |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = b.Controls[0].Reg() |
| } |
| default: |
| b.Fatalf("branch not implemented: %s", b.LongString()) |
| } |
| } |
| |
| func loadRegResult(s *ssagen.State, f *ssa.Func, t *types.Type, reg int16, n *ir.Name, off int64) *obj.Prog { |
| p := s.Prog(loadByType(t, reg)) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Name = obj.NAME_AUTO |
| p.From.Sym = n.Linksym() |
| p.From.Offset = n.FrameOffset() + off |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = reg |
| return p |
| } |
| |
| func spillArgReg(pp *objw.Progs, p *obj.Prog, f *ssa.Func, t *types.Type, reg int16, n *ir.Name, off int64) *obj.Prog { |
| p = pp.Append(p, storeByType(t, reg), obj.TYPE_REG, reg, 0, obj.TYPE_MEM, 0, n.FrameOffset()+off) |
| p.To.Name = obj.NAME_PARAM |
| p.To.Sym = n.Linksym() |
| p.Pos = p.Pos.WithNotStmt() |
| return p |
| } |
