| // Copyright 2016 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 ppc64 |
| |
| import ( |
| "cmd/compile/internal/gc" |
| "cmd/compile/internal/logopt" |
| "cmd/compile/internal/ssa" |
| "cmd/compile/internal/types" |
| "cmd/internal/obj" |
| "cmd/internal/obj/ppc64" |
| "cmd/internal/objabi" |
| "math" |
| "strings" |
| ) |
| |
| // markMoves marks any MOVXconst ops that need to avoid clobbering flags. |
| func ssaMarkMoves(s *gc.SSAGenState, b *ssa.Block) { |
| // flive := b.FlagsLiveAtEnd |
| // if b.Control != nil && b.Control.Type.IsFlags() { |
| // flive = true |
| // } |
| // for i := len(b.Values) - 1; i >= 0; i-- { |
| // v := b.Values[i] |
| // if flive && (v.Op == v.Op == ssa.OpPPC64MOVDconst) { |
| // // The "mark" is any non-nil Aux value. |
| // v.Aux = v |
| // } |
| // if v.Type.IsFlags() { |
| // flive = false |
| // } |
| // for _, a := range v.Args { |
| // if a.Type.IsFlags() { |
| // flive = true |
| // } |
| // } |
| // } |
| } |
| |
| // loadByType returns the load instruction of the given type. |
| func loadByType(t *types.Type) obj.As { |
| if t.IsFloat() { |
| switch t.Size() { |
| case 4: |
| return ppc64.AFMOVS |
| case 8: |
| return ppc64.AFMOVD |
| } |
| } else { |
| switch t.Size() { |
| case 1: |
| if t.IsSigned() { |
| return ppc64.AMOVB |
| } else { |
| return ppc64.AMOVBZ |
| } |
| case 2: |
| if t.IsSigned() { |
| return ppc64.AMOVH |
| } else { |
| return ppc64.AMOVHZ |
| } |
| case 4: |
| if t.IsSigned() { |
| return ppc64.AMOVW |
| } else { |
| return ppc64.AMOVWZ |
| } |
| case 8: |
| return ppc64.AMOVD |
| } |
| } |
| panic("bad load type") |
| } |
| |
| // storeByType returns the store instruction of the given type. |
| func storeByType(t *types.Type) obj.As { |
| if t.IsFloat() { |
| switch t.Size() { |
| case 4: |
| return ppc64.AFMOVS |
| case 8: |
| return ppc64.AFMOVD |
| } |
| } else { |
| switch t.Size() { |
| case 1: |
| return ppc64.AMOVB |
| case 2: |
| return ppc64.AMOVH |
| case 4: |
| return ppc64.AMOVW |
| case 8: |
| return ppc64.AMOVD |
| } |
| } |
| panic("bad store type") |
| } |
| |
| func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { |
| switch v.Op { |
| case ssa.OpCopy: |
| t := v.Type |
| if t.IsMemory() { |
| return |
| } |
| x := v.Args[0].Reg() |
| y := v.Reg() |
| if x != y { |
| rt := obj.TYPE_REG |
| op := ppc64.AMOVD |
| |
| if t.IsFloat() { |
| op = ppc64.AFMOVD |
| } |
| p := s.Prog(op) |
| p.From.Type = rt |
| p.From.Reg = x |
| p.To.Type = rt |
| p.To.Reg = y |
| } |
| |
| case ssa.OpPPC64LoweredMuluhilo: |
| // MULHDU Rarg1, Rarg0, Reg0 |
| // MULLD Rarg1, Rarg0, Reg1 |
| r0 := v.Args[0].Reg() |
| r1 := v.Args[1].Reg() |
| p := s.Prog(ppc64.AMULHDU) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = r1 |
| p.Reg = r0 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg0() |
| p1 := s.Prog(ppc64.AMULLD) |
| p1.From.Type = obj.TYPE_REG |
| p1.From.Reg = r1 |
| p1.Reg = r0 |
| p1.To.Type = obj.TYPE_REG |
| p1.To.Reg = v.Reg1() |
| |
| case ssa.OpPPC64LoweredAdd64Carry: |
| // ADDC Rarg2, -1, Rtmp |
| // ADDE Rarg1, Rarg0, Reg0 |
| // ADDZE Rzero, Reg1 |
| r0 := v.Args[0].Reg() |
| r1 := v.Args[1].Reg() |
| r2 := v.Args[2].Reg() |
| p := s.Prog(ppc64.AADDC) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = -1 |
| p.Reg = r2 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REGTMP |
| p1 := s.Prog(ppc64.AADDE) |
| p1.From.Type = obj.TYPE_REG |
| p1.From.Reg = r1 |
| p1.Reg = r0 |
| p1.To.Type = obj.TYPE_REG |
| p1.To.Reg = v.Reg0() |
| p2 := s.Prog(ppc64.AADDZE) |
| p2.From.Type = obj.TYPE_REG |
| p2.From.Reg = ppc64.REGZERO |
| p2.To.Type = obj.TYPE_REG |
| p2.To.Reg = v.Reg1() |
| |
| case ssa.OpPPC64LoweredAtomicAnd8, |
| ssa.OpPPC64LoweredAtomicAnd32, |
| ssa.OpPPC64LoweredAtomicOr8, |
| ssa.OpPPC64LoweredAtomicOr32: |
| // LWSYNC |
| // LBAR/LWAR (Rarg0), Rtmp |
| // AND/OR Rarg1, Rtmp |
| // STBCCC/STWCCC Rtmp, (Rarg0) |
| // BNE -3(PC) |
| ld := ppc64.ALBAR |
| st := ppc64.ASTBCCC |
| if v.Op == ssa.OpPPC64LoweredAtomicAnd32 || v.Op == ssa.OpPPC64LoweredAtomicOr32 { |
| ld = ppc64.ALWAR |
| st = ppc64.ASTWCCC |
| } |
| r0 := v.Args[0].Reg() |
| r1 := v.Args[1].Reg() |
| // LWSYNC - Assuming shared data not write-through-required nor |
| // caching-inhibited. See Appendix B.2.2.2 in the ISA 2.07b. |
| plwsync := s.Prog(ppc64.ALWSYNC) |
| plwsync.To.Type = obj.TYPE_NONE |
| // LBAR or LWAR |
| p := s.Prog(ld) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = r0 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REGTMP |
| // AND/OR reg1,out |
| p1 := s.Prog(v.Op.Asm()) |
| p1.From.Type = obj.TYPE_REG |
| p1.From.Reg = r1 |
| p1.To.Type = obj.TYPE_REG |
| p1.To.Reg = ppc64.REGTMP |
| // STBCCC or STWCCC |
| p2 := s.Prog(st) |
| p2.From.Type = obj.TYPE_REG |
| p2.From.Reg = ppc64.REGTMP |
| p2.To.Type = obj.TYPE_MEM |
| p2.To.Reg = r0 |
| p2.RegTo2 = ppc64.REGTMP |
| // BNE retry |
| p3 := s.Prog(ppc64.ABNE) |
| p3.To.Type = obj.TYPE_BRANCH |
| gc.Patch(p3, p) |
| |
| case ssa.OpPPC64LoweredAtomicAdd32, |
| ssa.OpPPC64LoweredAtomicAdd64: |
| // LWSYNC |
| // LDAR/LWAR (Rarg0), Rout |
| // ADD Rarg1, Rout |
| // STDCCC/STWCCC Rout, (Rarg0) |
| // BNE -3(PC) |
| // MOVW Rout,Rout (if Add32) |
| ld := ppc64.ALDAR |
| st := ppc64.ASTDCCC |
| if v.Op == ssa.OpPPC64LoweredAtomicAdd32 { |
| ld = ppc64.ALWAR |
| st = ppc64.ASTWCCC |
| } |
| r0 := v.Args[0].Reg() |
| r1 := v.Args[1].Reg() |
| out := v.Reg0() |
| // LWSYNC - Assuming shared data not write-through-required nor |
| // caching-inhibited. See Appendix B.2.2.2 in the ISA 2.07b. |
| plwsync := s.Prog(ppc64.ALWSYNC) |
| plwsync.To.Type = obj.TYPE_NONE |
| // LDAR or LWAR |
| p := s.Prog(ld) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = r0 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = out |
| // ADD reg1,out |
| p1 := s.Prog(ppc64.AADD) |
| p1.From.Type = obj.TYPE_REG |
| p1.From.Reg = r1 |
| p1.To.Reg = out |
| p1.To.Type = obj.TYPE_REG |
| // STDCCC or STWCCC |
| p3 := s.Prog(st) |
| p3.From.Type = obj.TYPE_REG |
| p3.From.Reg = out |
| p3.To.Type = obj.TYPE_MEM |
| p3.To.Reg = r0 |
| // BNE retry |
| p4 := s.Prog(ppc64.ABNE) |
| p4.To.Type = obj.TYPE_BRANCH |
| gc.Patch(p4, p) |
| |
| // Ensure a 32 bit result |
| if v.Op == ssa.OpPPC64LoweredAtomicAdd32 { |
| p5 := s.Prog(ppc64.AMOVWZ) |
| p5.To.Type = obj.TYPE_REG |
| p5.To.Reg = out |
| p5.From.Type = obj.TYPE_REG |
| p5.From.Reg = out |
| } |
| |
| case ssa.OpPPC64LoweredAtomicExchange32, |
| ssa.OpPPC64LoweredAtomicExchange64: |
| // LWSYNC |
| // LDAR/LWAR (Rarg0), Rout |
| // STDCCC/STWCCC Rout, (Rarg0) |
| // BNE -2(PC) |
| // ISYNC |
| ld := ppc64.ALDAR |
| st := ppc64.ASTDCCC |
| if v.Op == ssa.OpPPC64LoweredAtomicExchange32 { |
| ld = ppc64.ALWAR |
| st = ppc64.ASTWCCC |
| } |
| r0 := v.Args[0].Reg() |
| r1 := v.Args[1].Reg() |
| out := v.Reg0() |
| // LWSYNC - Assuming shared data not write-through-required nor |
| // caching-inhibited. See Appendix B.2.2.2 in the ISA 2.07b. |
| plwsync := s.Prog(ppc64.ALWSYNC) |
| plwsync.To.Type = obj.TYPE_NONE |
| // LDAR or LWAR |
| p := s.Prog(ld) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = r0 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = out |
| // STDCCC or STWCCC |
| p1 := s.Prog(st) |
| p1.From.Type = obj.TYPE_REG |
| p1.From.Reg = r1 |
| p1.To.Type = obj.TYPE_MEM |
| p1.To.Reg = r0 |
| // BNE retry |
| p2 := s.Prog(ppc64.ABNE) |
| p2.To.Type = obj.TYPE_BRANCH |
| gc.Patch(p2, p) |
| // ISYNC |
| pisync := s.Prog(ppc64.AISYNC) |
| pisync.To.Type = obj.TYPE_NONE |
| |
| case ssa.OpPPC64LoweredAtomicLoad8, |
| ssa.OpPPC64LoweredAtomicLoad32, |
| ssa.OpPPC64LoweredAtomicLoad64, |
| ssa.OpPPC64LoweredAtomicLoadPtr: |
| // SYNC |
| // MOVB/MOVD/MOVW (Rarg0), Rout |
| // CMP Rout,Rout |
| // BNE 1(PC) |
| // ISYNC |
| ld := ppc64.AMOVD |
| cmp := ppc64.ACMP |
| switch v.Op { |
| case ssa.OpPPC64LoweredAtomicLoad8: |
| ld = ppc64.AMOVBZ |
| case ssa.OpPPC64LoweredAtomicLoad32: |
| ld = ppc64.AMOVWZ |
| cmp = ppc64.ACMPW |
| } |
| arg0 := v.Args[0].Reg() |
| out := v.Reg0() |
| // SYNC when AuxInt == 1; otherwise, load-acquire |
| if v.AuxInt == 1 { |
| psync := s.Prog(ppc64.ASYNC) |
| psync.To.Type = obj.TYPE_NONE |
| } |
| // Load |
| p := s.Prog(ld) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = arg0 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = out |
| // CMP |
| p1 := s.Prog(cmp) |
| p1.From.Type = obj.TYPE_REG |
| p1.From.Reg = out |
| p1.To.Type = obj.TYPE_REG |
| p1.To.Reg = out |
| // BNE |
| p2 := s.Prog(ppc64.ABNE) |
| p2.To.Type = obj.TYPE_BRANCH |
| // ISYNC |
| pisync := s.Prog(ppc64.AISYNC) |
| pisync.To.Type = obj.TYPE_NONE |
| gc.Patch(p2, pisync) |
| |
| case ssa.OpPPC64LoweredAtomicStore8, |
| ssa.OpPPC64LoweredAtomicStore32, |
| ssa.OpPPC64LoweredAtomicStore64: |
| // SYNC or LWSYNC |
| // MOVB/MOVW/MOVD arg1,(arg0) |
| st := ppc64.AMOVD |
| switch v.Op { |
| case ssa.OpPPC64LoweredAtomicStore8: |
| st = ppc64.AMOVB |
| case ssa.OpPPC64LoweredAtomicStore32: |
| st = ppc64.AMOVW |
| } |
| arg0 := v.Args[0].Reg() |
| arg1 := v.Args[1].Reg() |
| // If AuxInt == 0, LWSYNC (Store-Release), else SYNC |
| // SYNC |
| syncOp := ppc64.ASYNC |
| if v.AuxInt == 0 { |
| syncOp = ppc64.ALWSYNC |
| } |
| psync := s.Prog(syncOp) |
| psync.To.Type = obj.TYPE_NONE |
| // Store |
| p := s.Prog(st) |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = arg0 |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = arg1 |
| |
| case ssa.OpPPC64LoweredAtomicCas64, |
| ssa.OpPPC64LoweredAtomicCas32: |
| // LWSYNC |
| // loop: |
| // LDAR (Rarg0), MutexHint, Rtmp |
| // CMP Rarg1, Rtmp |
| // BNE fail |
| // STDCCC Rarg2, (Rarg0) |
| // BNE loop |
| // LWSYNC // Only for sequential consistency; not required in CasRel. |
| // MOVD $1, Rout |
| // BR end |
| // fail: |
| // MOVD $0, Rout |
| // end: |
| ld := ppc64.ALDAR |
| st := ppc64.ASTDCCC |
| cmp := ppc64.ACMP |
| if v.Op == ssa.OpPPC64LoweredAtomicCas32 { |
| ld = ppc64.ALWAR |
| st = ppc64.ASTWCCC |
| cmp = ppc64.ACMPW |
| } |
| r0 := v.Args[0].Reg() |
| r1 := v.Args[1].Reg() |
| r2 := v.Args[2].Reg() |
| out := v.Reg0() |
| // LWSYNC - Assuming shared data not write-through-required nor |
| // caching-inhibited. See Appendix B.2.2.2 in the ISA 2.07b. |
| plwsync1 := s.Prog(ppc64.ALWSYNC) |
| plwsync1.To.Type = obj.TYPE_NONE |
| // LDAR or LWAR |
| p := s.Prog(ld) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = r0 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REGTMP |
| // If it is a Compare-and-Swap-Release operation, set the EH field with |
| // the release hint. |
| if v.AuxInt == 0 { |
| p.SetFrom3(obj.Addr{Type: obj.TYPE_CONST, Offset: 0}) |
| } |
| // CMP reg1,reg2 |
| p1 := s.Prog(cmp) |
| p1.From.Type = obj.TYPE_REG |
| p1.From.Reg = r1 |
| p1.To.Reg = ppc64.REGTMP |
| p1.To.Type = obj.TYPE_REG |
| // BNE cas_fail |
| p2 := s.Prog(ppc64.ABNE) |
| p2.To.Type = obj.TYPE_BRANCH |
| // STDCCC or STWCCC |
| p3 := s.Prog(st) |
| p3.From.Type = obj.TYPE_REG |
| p3.From.Reg = r2 |
| p3.To.Type = obj.TYPE_MEM |
| p3.To.Reg = r0 |
| // BNE retry |
| p4 := s.Prog(ppc64.ABNE) |
| p4.To.Type = obj.TYPE_BRANCH |
| gc.Patch(p4, p) |
| // LWSYNC - Assuming shared data not write-through-required nor |
| // caching-inhibited. See Appendix B.2.1.1 in the ISA 2.07b. |
| // If the operation is a CAS-Release, then synchronization is not necessary. |
| if v.AuxInt != 0 { |
| plwsync2 := s.Prog(ppc64.ALWSYNC) |
| plwsync2.To.Type = obj.TYPE_NONE |
| } |
| // return true |
| p5 := s.Prog(ppc64.AMOVD) |
| p5.From.Type = obj.TYPE_CONST |
| p5.From.Offset = 1 |
| p5.To.Type = obj.TYPE_REG |
| p5.To.Reg = out |
| // BR done |
| p6 := s.Prog(obj.AJMP) |
| p6.To.Type = obj.TYPE_BRANCH |
| // return false |
| p7 := s.Prog(ppc64.AMOVD) |
| p7.From.Type = obj.TYPE_CONST |
| p7.From.Offset = 0 |
| p7.To.Type = obj.TYPE_REG |
| p7.To.Reg = out |
| gc.Patch(p2, p7) |
| // done (label) |
| p8 := s.Prog(obj.ANOP) |
| gc.Patch(p6, p8) |
| |
| case ssa.OpPPC64LoweredGetClosurePtr: |
| // Closure pointer is R11 (already) |
| gc.CheckLoweredGetClosurePtr(v) |
| |
| case ssa.OpPPC64LoweredGetCallerSP: |
| // caller's SP is FixedFrameSize below the address of the first arg |
| p := s.Prog(ppc64.AMOVD) |
| p.From.Type = obj.TYPE_ADDR |
| p.From.Offset = -gc.Ctxt.FixedFrameSize() |
| p.From.Name = obj.NAME_PARAM |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| |
| case ssa.OpPPC64LoweredGetCallerPC: |
| p := s.Prog(obj.AGETCALLERPC) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| |
| case ssa.OpPPC64LoweredRound32F, ssa.OpPPC64LoweredRound64F: |
| // input is already rounded |
| |
| case ssa.OpLoadReg: |
| loadOp := loadByType(v.Type) |
| p := s.Prog(loadOp) |
| gc.AddrAuto(&p.From, v.Args[0]) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| |
| case ssa.OpStoreReg: |
| storeOp := storeByType(v.Type) |
| p := s.Prog(storeOp) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[0].Reg() |
| gc.AddrAuto(&p.To, v) |
| |
| case ssa.OpPPC64DIVD: |
| // For now, |
| // |
| // cmp arg1, -1 |
| // be ahead |
| // v = arg0 / arg1 |
| // b over |
| // ahead: v = - arg0 |
| // over: nop |
| r := v.Reg() |
| r0 := v.Args[0].Reg() |
| r1 := v.Args[1].Reg() |
| |
| p := s.Prog(ppc64.ACMP) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = r1 |
| p.To.Type = obj.TYPE_CONST |
| p.To.Offset = -1 |
| |
| pbahead := s.Prog(ppc64.ABEQ) |
| pbahead.To.Type = obj.TYPE_BRANCH |
| |
| p = s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = r1 |
| p.Reg = r0 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = r |
| |
| pbover := s.Prog(obj.AJMP) |
| pbover.To.Type = obj.TYPE_BRANCH |
| |
| p = s.Prog(ppc64.ANEG) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = r |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = r0 |
| gc.Patch(pbahead, p) |
| |
| p = s.Prog(obj.ANOP) |
| gc.Patch(pbover, p) |
| |
| case ssa.OpPPC64DIVW: |
| // word-width version of above |
| r := v.Reg() |
| r0 := v.Args[0].Reg() |
| r1 := v.Args[1].Reg() |
| |
| p := s.Prog(ppc64.ACMPW) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = r1 |
| p.To.Type = obj.TYPE_CONST |
| p.To.Offset = -1 |
| |
| pbahead := s.Prog(ppc64.ABEQ) |
| pbahead.To.Type = obj.TYPE_BRANCH |
| |
| p = s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = r1 |
| p.Reg = r0 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = r |
| |
| pbover := s.Prog(obj.AJMP) |
| pbover.To.Type = obj.TYPE_BRANCH |
| |
| p = s.Prog(ppc64.ANEG) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = r |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = r0 |
| gc.Patch(pbahead, p) |
| |
| p = s.Prog(obj.ANOP) |
| gc.Patch(pbover, p) |
| |
| case ssa.OpPPC64CLRLSLWI: |
| r := v.Reg() |
| r1 := v.Args[0].Reg() |
| shifts := v.AuxInt |
| p := s.Prog(v.Op.Asm()) |
| // clrlslwi ra,rs,mb,sh will become rlwinm ra,rs,sh,mb-sh,31-sh as described in ISA |
| p.From = obj.Addr{Type: obj.TYPE_CONST, Offset: ssa.GetPPC64Shiftmb(shifts)} |
| p.SetFrom3(obj.Addr{Type: obj.TYPE_CONST, Offset: ssa.GetPPC64Shiftsh(shifts)}) |
| p.Reg = r1 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = r |
| |
| case ssa.OpPPC64CLRLSLDI: |
| r := v.Reg() |
| r1 := v.Args[0].Reg() |
| shifts := v.AuxInt |
| p := s.Prog(v.Op.Asm()) |
| // clrlsldi ra,rs,mb,sh will become rldic ra,rs,sh,mb-sh |
| p.From = obj.Addr{Type: obj.TYPE_CONST, Offset: ssa.GetPPC64Shiftmb(shifts)} |
| p.SetFrom3(obj.Addr{Type: obj.TYPE_CONST, Offset: ssa.GetPPC64Shiftsh(shifts)}) |
| p.Reg = r1 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = r |
| |
| // Mask has been set as sh |
| case ssa.OpPPC64RLDICL: |
| r := v.Reg() |
| r1 := v.Args[0].Reg() |
| shifts := v.AuxInt |
| p := s.Prog(v.Op.Asm()) |
| p.From = obj.Addr{Type: obj.TYPE_CONST, Offset: ssa.GetPPC64Shiftsh(shifts)} |
| p.SetFrom3(obj.Addr{Type: obj.TYPE_CONST, Offset: ssa.GetPPC64Shiftmb(shifts)}) |
| p.Reg = r1 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = r |
| |
| case ssa.OpPPC64ADD, ssa.OpPPC64FADD, ssa.OpPPC64FADDS, ssa.OpPPC64SUB, ssa.OpPPC64FSUB, ssa.OpPPC64FSUBS, |
| ssa.OpPPC64MULLD, ssa.OpPPC64MULLW, ssa.OpPPC64DIVDU, ssa.OpPPC64DIVWU, |
| ssa.OpPPC64SRAD, ssa.OpPPC64SRAW, ssa.OpPPC64SRD, ssa.OpPPC64SRW, ssa.OpPPC64SLD, ssa.OpPPC64SLW, |
| ssa.OpPPC64ROTL, ssa.OpPPC64ROTLW, |
| ssa.OpPPC64MULHD, ssa.OpPPC64MULHW, ssa.OpPPC64MULHDU, ssa.OpPPC64MULHWU, |
| ssa.OpPPC64FMUL, ssa.OpPPC64FMULS, ssa.OpPPC64FDIV, ssa.OpPPC64FDIVS, ssa.OpPPC64FCPSGN, |
| ssa.OpPPC64AND, ssa.OpPPC64OR, ssa.OpPPC64ANDN, ssa.OpPPC64ORN, ssa.OpPPC64NOR, ssa.OpPPC64XOR, ssa.OpPPC64EQV, |
| ssa.OpPPC64MODUD, ssa.OpPPC64MODSD, ssa.OpPPC64MODUW, ssa.OpPPC64MODSW: |
| r := v.Reg() |
| r1 := v.Args[0].Reg() |
| r2 := v.Args[1].Reg() |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = r2 |
| p.Reg = r1 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = r |
| |
| case ssa.OpPPC64ANDCC, ssa.OpPPC64ORCC, ssa.OpPPC64XORCC: |
| r1 := v.Args[0].Reg() |
| r2 := v.Args[1].Reg() |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = r2 |
| p.Reg = r1 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REGTMP // result is not needed |
| |
| case ssa.OpPPC64ROTLconst, ssa.OpPPC64ROTLWconst: |
| 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.OpPPC64MADDLD: |
| r := v.Reg() |
| r1 := v.Args[0].Reg() |
| r2 := v.Args[1].Reg() |
| r3 := v.Args[2].Reg() |
| // r = r1*r2 ± r3 |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = r1 |
| p.Reg = r2 |
| p.SetFrom3(obj.Addr{Type: obj.TYPE_REG, Reg: r3}) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = r |
| |
| case ssa.OpPPC64FMADD, ssa.OpPPC64FMADDS, ssa.OpPPC64FMSUB, ssa.OpPPC64FMSUBS: |
| r := v.Reg() |
| r1 := v.Args[0].Reg() |
| r2 := v.Args[1].Reg() |
| r3 := v.Args[2].Reg() |
| // r = r1*r2 ± r3 |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = r1 |
| p.Reg = r3 |
| p.SetFrom3(obj.Addr{Type: obj.TYPE_REG, Reg: r2}) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = r |
| |
| case ssa.OpPPC64NEG, ssa.OpPPC64FNEG, ssa.OpPPC64FSQRT, ssa.OpPPC64FSQRTS, ssa.OpPPC64FFLOOR, ssa.OpPPC64FTRUNC, ssa.OpPPC64FCEIL, |
| ssa.OpPPC64FCTIDZ, ssa.OpPPC64FCTIWZ, ssa.OpPPC64FCFID, ssa.OpPPC64FCFIDS, ssa.OpPPC64FRSP, ssa.OpPPC64CNTLZD, ssa.OpPPC64CNTLZW, |
| ssa.OpPPC64POPCNTD, ssa.OpPPC64POPCNTW, ssa.OpPPC64POPCNTB, ssa.OpPPC64MFVSRD, ssa.OpPPC64MTVSRD, ssa.OpPPC64FABS, ssa.OpPPC64FNABS, |
| ssa.OpPPC64FROUND, ssa.OpPPC64CNTTZW, ssa.OpPPC64CNTTZD: |
| r := v.Reg() |
| p := s.Prog(v.Op.Asm()) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = r |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[0].Reg() |
| |
| case ssa.OpPPC64ADDconst, ssa.OpPPC64ANDconst, ssa.OpPPC64ORconst, ssa.OpPPC64XORconst, |
| ssa.OpPPC64SRADconst, ssa.OpPPC64SRAWconst, ssa.OpPPC64SRDconst, ssa.OpPPC64SRWconst, |
| ssa.OpPPC64SLDconst, ssa.OpPPC64SLWconst, ssa.OpPPC64EXTSWSLconst, ssa.OpPPC64MULLWconst, ssa.OpPPC64MULLDconst: |
| p := s.Prog(v.Op.Asm()) |
| p.Reg = v.Args[0].Reg() |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = v.AuxInt |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| |
| case ssa.OpPPC64SUBFCconst: |
| p := s.Prog(v.Op.Asm()) |
| p.SetFrom3(obj.Addr{Type: obj.TYPE_CONST, Offset: v.AuxInt}) |
| 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.OpPPC64ANDCCconst: |
| p := s.Prog(v.Op.Asm()) |
| p.Reg = v.Args[0].Reg() |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = v.AuxInt |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REGTMP // discard result |
| |
| case ssa.OpPPC64MOVDaddr: |
| switch v.Aux.(type) { |
| default: |
| v.Fatalf("aux in MOVDaddr is of unknown type %T", v.Aux) |
| case nil: |
| // If aux offset and aux int are both 0, and the same |
| // input and output regs are used, no instruction |
| // needs to be generated, since it would just be |
| // addi rx, rx, 0. |
| if v.AuxInt != 0 || v.Args[0].Reg() != v.Reg() { |
| p := s.Prog(ppc64.AMOVD) |
| p.From.Type = obj.TYPE_ADDR |
| p.From.Reg = v.Args[0].Reg() |
| p.From.Offset = v.AuxInt |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| } |
| |
| case *obj.LSym, *gc.Node: |
| p := s.Prog(ppc64.AMOVD) |
| p.From.Type = obj.TYPE_ADDR |
| p.From.Reg = v.Args[0].Reg() |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| gc.AddAux(&p.From, v) |
| |
| } |
| |
| case ssa.OpPPC64MOVDconst: |
| 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 = v.Reg() |
| |
| case ssa.OpPPC64FMOVDconst, ssa.OpPPC64FMOVSconst: |
| 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.OpPPC64FCMPU, ssa.OpPPC64CMP, ssa.OpPPC64CMPW, ssa.OpPPC64CMPU, ssa.OpPPC64CMPWU: |
| 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.Args[1].Reg() |
| |
| case ssa.OpPPC64CMPconst, ssa.OpPPC64CMPUconst, ssa.OpPPC64CMPWconst, ssa.OpPPC64CMPWUconst: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[0].Reg() |
| p.To.Type = obj.TYPE_CONST |
| p.To.Offset = v.AuxInt |
| |
| case ssa.OpPPC64MOVBreg, ssa.OpPPC64MOVBZreg, ssa.OpPPC64MOVHreg, ssa.OpPPC64MOVHZreg, ssa.OpPPC64MOVWreg, ssa.OpPPC64MOVWZreg: |
| // Shift in register to required size |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[0].Reg() |
| p.To.Reg = v.Reg() |
| p.To.Type = obj.TYPE_REG |
| |
| case ssa.OpPPC64MOVDload: |
| |
| // MOVDload uses a DS instruction which requires the offset value of the data to be a multiple of 4. |
| // For offsets known at compile time, a MOVDload won't be selected, but in the case of a go.string, |
| // the offset is not known until link time. If the load of a go.string uses relocation for the |
| // offset field of the instruction, and if the offset is not aligned to 4, then a link error will occur. |
| // To avoid this problem, the full address of the go.string is computed and loaded into the base register, |
| // and that base register is used for the MOVDload using a 0 offset. This problem can only occur with |
| // go.string types because other types will have proper alignment. |
| |
| gostring := false |
| switch n := v.Aux.(type) { |
| case *obj.LSym: |
| gostring = strings.HasPrefix(n.Name, "go.string.") |
| } |
| if gostring { |
| // Generate full addr of the go.string const |
| // including AuxInt |
| p := s.Prog(ppc64.AMOVD) |
| p.From.Type = obj.TYPE_ADDR |
| p.From.Reg = v.Args[0].Reg() |
| gc.AddAux(&p.From, v) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| // Load go.string using 0 offset |
| p = s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = v.Reg() |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| break |
| } |
| // Not a go.string, generate a normal load |
| fallthrough |
| |
| case ssa.OpPPC64MOVWload, ssa.OpPPC64MOVHload, ssa.OpPPC64MOVWZload, ssa.OpPPC64MOVBZload, ssa.OpPPC64MOVHZload, ssa.OpPPC64FMOVDload, ssa.OpPPC64FMOVSload: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = v.Args[0].Reg() |
| gc.AddAux(&p.From, v) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| |
| case ssa.OpPPC64MOVDBRload, ssa.OpPPC64MOVWBRload, ssa.OpPPC64MOVHBRload: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = v.Args[0].Reg() |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| |
| case ssa.OpPPC64MOVDBRstore, ssa.OpPPC64MOVWBRstore, ssa.OpPPC64MOVHBRstore: |
| p := s.Prog(v.Op.Asm()) |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[1].Reg() |
| |
| case ssa.OpPPC64MOVDloadidx, ssa.OpPPC64MOVWloadidx, ssa.OpPPC64MOVHloadidx, ssa.OpPPC64MOVWZloadidx, |
| ssa.OpPPC64MOVBZloadidx, ssa.OpPPC64MOVHZloadidx, ssa.OpPPC64FMOVDloadidx, ssa.OpPPC64FMOVSloadidx, |
| ssa.OpPPC64MOVDBRloadidx, ssa.OpPPC64MOVWBRloadidx, ssa.OpPPC64MOVHBRloadidx: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = v.Args[0].Reg() |
| p.From.Index = v.Args[1].Reg() |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| |
| case ssa.OpPPC64MOVDstorezero, ssa.OpPPC64MOVWstorezero, ssa.OpPPC64MOVHstorezero, ssa.OpPPC64MOVBstorezero: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REGZERO |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| gc.AddAux(&p.To, v) |
| |
| case ssa.OpPPC64MOVDstore, ssa.OpPPC64MOVWstore, ssa.OpPPC64MOVHstore, ssa.OpPPC64MOVBstore, ssa.OpPPC64FMOVDstore, ssa.OpPPC64FMOVSstore: |
| 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() |
| gc.AddAux(&p.To, v) |
| |
| case ssa.OpPPC64MOVDstoreidx, ssa.OpPPC64MOVWstoreidx, ssa.OpPPC64MOVHstoreidx, ssa.OpPPC64MOVBstoreidx, |
| ssa.OpPPC64FMOVDstoreidx, ssa.OpPPC64FMOVSstoreidx, ssa.OpPPC64MOVDBRstoreidx, ssa.OpPPC64MOVWBRstoreidx, |
| ssa.OpPPC64MOVHBRstoreidx: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[2].Reg() |
| p.To.Index = v.Args[1].Reg() |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| |
| case ssa.OpPPC64ISEL, ssa.OpPPC64ISELB: |
| // ISEL, ISELB |
| // AuxInt value indicates condition: 0=LT 1=GT 2=EQ 4=GE 5=LE 6=NE |
| // ISEL only accepts 0, 1, 2 condition values but the others can be |
| // achieved by swapping operand order. |
| // arg0 ? arg1 : arg2 with conditions LT, GT, EQ |
| // arg0 ? arg2 : arg1 for conditions GE, LE, NE |
| // ISELB is used when a boolean result is needed, returning 0 or 1 |
| p := s.Prog(ppc64.AISEL) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| // For ISELB, boolean result 0 or 1. Use R0 for 0 operand to avoid load. |
| r := obj.Addr{Type: obj.TYPE_REG, Reg: ppc64.REG_R0} |
| if v.Op == ssa.OpPPC64ISEL { |
| r.Reg = v.Args[1].Reg() |
| } |
| // AuxInt values 4,5,6 implemented with reverse operand order from 0,1,2 |
| if v.AuxInt > 3 { |
| p.Reg = r.Reg |
| p.SetFrom3(obj.Addr{Type: obj.TYPE_REG, Reg: v.Args[0].Reg()}) |
| } else { |
| p.Reg = v.Args[0].Reg() |
| p.SetFrom3(r) |
| } |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = v.AuxInt & 3 |
| |
| case ssa.OpPPC64LoweredQuadZero, ssa.OpPPC64LoweredQuadZeroShort: |
| // The LoweredQuad code generation |
| // generates STXV instructions on |
| // power9. The Short variation is used |
| // if no loop is generated. |
| |
| // sizes >= 64 generate a loop as follows: |
| |
| // Set up loop counter in CTR, used by BC |
| // XXLXOR clears VS32 |
| // XXLXOR VS32,VS32,VS32 |
| // MOVD len/64,REG_TMP |
| // MOVD REG_TMP,CTR |
| // loop: |
| // STXV VS32,0(R20) |
| // STXV VS32,16(R20) |
| // STXV VS32,32(R20) |
| // STXV VS32,48(R20) |
| // ADD $64,R20 |
| // BC 16, 0, loop |
| |
| // Bytes per iteration |
| ctr := v.AuxInt / 64 |
| |
| // Remainder bytes |
| rem := v.AuxInt % 64 |
| |
| // Only generate a loop if there is more |
| // than 1 iteration. |
| if ctr > 1 { |
| // Set up VS32 (V0) to hold 0s |
| p := s.Prog(ppc64.AXXLXOR) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS32 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_VS32 |
| p.Reg = ppc64.REG_VS32 |
| |
| // Set up CTR loop counter |
| p = s.Prog(ppc64.AMOVD) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = ctr |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REGTMP |
| |
| p = s.Prog(ppc64.AMOVD) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REGTMP |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_CTR |
| |
| // Don't generate padding for |
| // loops with few iterations. |
| if ctr > 3 { |
| p = s.Prog(obj.APCALIGN) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = 16 |
| } |
| |
| // generate 4 STXVs to zero 64 bytes |
| var top *obj.Prog |
| |
| p = s.Prog(ppc64.ASTXV) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS32 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| |
| // Save the top of loop |
| if top == nil { |
| top = p |
| } |
| p = s.Prog(ppc64.ASTXV) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS32 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| p.To.Offset = 16 |
| |
| p = s.Prog(ppc64.ASTXV) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS32 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| p.To.Offset = 32 |
| |
| p = s.Prog(ppc64.ASTXV) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS32 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| p.To.Offset = 48 |
| |
| // Increment address for the |
| // 64 bytes just zeroed. |
| p = s.Prog(ppc64.AADD) |
| p.Reg = v.Args[0].Reg() |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = 64 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Args[0].Reg() |
| |
| // Branch back to top of loop |
| // based on CTR |
| // BC with BO_BCTR generates bdnz |
| p = s.Prog(ppc64.ABC) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = ppc64.BO_BCTR |
| p.Reg = ppc64.REG_R0 |
| p.To.Type = obj.TYPE_BRANCH |
| gc.Patch(p, top) |
| } |
| // When ctr == 1 the loop was not generated but |
| // there are at least 64 bytes to clear, so add |
| // that to the remainder to generate the code |
| // to clear those doublewords |
| if ctr == 1 { |
| rem += 64 |
| } |
| |
| // Clear the remainder starting at offset zero |
| offset := int64(0) |
| |
| if rem >= 16 && ctr <= 1 { |
| // If the XXLXOR hasn't already been |
| // generated, do it here to initialize |
| // VS32 (V0) to 0. |
| p := s.Prog(ppc64.AXXLXOR) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS32 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_VS32 |
| p.Reg = ppc64.REG_VS32 |
| } |
| // Generate STXV for 32 or 64 |
| // bytes. |
| for rem >= 32 { |
| p := s.Prog(ppc64.ASTXV) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS32 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| p.To.Offset = offset |
| |
| p = s.Prog(ppc64.ASTXV) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS32 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| p.To.Offset = offset + 16 |
| offset += 32 |
| rem -= 32 |
| } |
| // Generate 16 bytes |
| if rem >= 16 { |
| p := s.Prog(ppc64.ASTXV) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS32 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| p.To.Offset = offset |
| offset += 16 |
| rem -= 16 |
| } |
| |
| // first clear as many doublewords as possible |
| // then clear remaining sizes as available |
| for rem > 0 { |
| op, size := ppc64.AMOVB, int64(1) |
| switch { |
| case rem >= 8: |
| op, size = ppc64.AMOVD, 8 |
| case rem >= 4: |
| op, size = ppc64.AMOVW, 4 |
| case rem >= 2: |
| op, size = ppc64.AMOVH, 2 |
| } |
| p := s.Prog(op) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_R0 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| p.To.Offset = offset |
| rem -= size |
| offset += size |
| } |
| |
| case ssa.OpPPC64LoweredZero, ssa.OpPPC64LoweredZeroShort: |
| |
| // Unaligned data doesn't hurt performance |
| // for these instructions on power8. |
| |
| // For sizes >= 64 generate a loop as follows: |
| |
| // Set up loop counter in CTR, used by BC |
| // XXLXOR VS32,VS32,VS32 |
| // MOVD len/32,REG_TMP |
| // MOVD REG_TMP,CTR |
| // MOVD $16,REG_TMP |
| // loop: |
| // STXVD2X VS32,(R0)(R20) |
| // STXVD2X VS32,(R31)(R20) |
| // ADD $32,R20 |
| // BC 16, 0, loop |
| // |
| // any remainder is done as described below |
| |
| // for sizes < 64 bytes, first clear as many doublewords as possible, |
| // then handle the remainder |
| // MOVD R0,(R20) |
| // MOVD R0,8(R20) |
| // .... etc. |
| // |
| // the remainder bytes are cleared using one or more |
| // of the following instructions with the appropriate |
| // offsets depending which instructions are needed |
| // |
| // MOVW R0,n1(R20) 4 bytes |
| // MOVH R0,n2(R20) 2 bytes |
| // MOVB R0,n3(R20) 1 byte |
| // |
| // 7 bytes: MOVW, MOVH, MOVB |
| // 6 bytes: MOVW, MOVH |
| // 5 bytes: MOVW, MOVB |
| // 3 bytes: MOVH, MOVB |
| |
| // each loop iteration does 32 bytes |
| ctr := v.AuxInt / 32 |
| |
| // remainder bytes |
| rem := v.AuxInt % 32 |
| |
| // only generate a loop if there is more |
| // than 1 iteration. |
| if ctr > 1 { |
| // Set up VS32 (V0) to hold 0s |
| p := s.Prog(ppc64.AXXLXOR) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS32 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_VS32 |
| p.Reg = ppc64.REG_VS32 |
| |
| // Set up CTR loop counter |
| p = s.Prog(ppc64.AMOVD) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = ctr |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REGTMP |
| |
| p = s.Prog(ppc64.AMOVD) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REGTMP |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_CTR |
| |
| // Set up R31 to hold index value 16 |
| p = s.Prog(ppc64.AMOVD) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = 16 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REGTMP |
| |
| // Don't add padding for alignment |
| // with few loop iterations. |
| if ctr > 3 { |
| p = s.Prog(obj.APCALIGN) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = 16 |
| } |
| |
| // generate 2 STXVD2Xs to store 16 bytes |
| // when this is a loop then the top must be saved |
| var top *obj.Prog |
| // This is the top of loop |
| |
| p = s.Prog(ppc64.ASTXVD2X) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS32 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| p.To.Index = ppc64.REGZERO |
| // Save the top of loop |
| if top == nil { |
| top = p |
| } |
| p = s.Prog(ppc64.ASTXVD2X) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS32 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| p.To.Index = ppc64.REGTMP |
| |
| // Increment address for the |
| // 4 doublewords just zeroed. |
| p = s.Prog(ppc64.AADD) |
| p.Reg = v.Args[0].Reg() |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = 32 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Args[0].Reg() |
| |
| // Branch back to top of loop |
| // based on CTR |
| // BC with BO_BCTR generates bdnz |
| p = s.Prog(ppc64.ABC) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = ppc64.BO_BCTR |
| p.Reg = ppc64.REG_R0 |
| p.To.Type = obj.TYPE_BRANCH |
| gc.Patch(p, top) |
| } |
| |
| // when ctr == 1 the loop was not generated but |
| // there are at least 32 bytes to clear, so add |
| // that to the remainder to generate the code |
| // to clear those doublewords |
| if ctr == 1 { |
| rem += 32 |
| } |
| |
| // clear the remainder starting at offset zero |
| offset := int64(0) |
| |
| // first clear as many doublewords as possible |
| // then clear remaining sizes as available |
| for rem > 0 { |
| op, size := ppc64.AMOVB, int64(1) |
| switch { |
| case rem >= 8: |
| op, size = ppc64.AMOVD, 8 |
| case rem >= 4: |
| op, size = ppc64.AMOVW, 4 |
| case rem >= 2: |
| op, size = ppc64.AMOVH, 2 |
| } |
| p := s.Prog(op) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_R0 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| p.To.Offset = offset |
| rem -= size |
| offset += size |
| } |
| |
| case ssa.OpPPC64LoweredMove, ssa.OpPPC64LoweredMoveShort: |
| |
| bytesPerLoop := int64(32) |
| // This will be used when moving more |
| // than 8 bytes. Moves start with |
| // as many 8 byte moves as possible, then |
| // 4, 2, or 1 byte(s) as remaining. This will |
| // work and be efficient for power8 or later. |
| // If there are 64 or more bytes, then a |
| // loop is generated to move 32 bytes and |
| // update the src and dst addresses on each |
| // iteration. When < 64 bytes, the appropriate |
| // number of moves are generated based on the |
| // size. |
| // When moving >= 64 bytes a loop is used |
| // MOVD len/32,REG_TMP |
| // MOVD REG_TMP,CTR |
| // MOVD $16,REG_TMP |
| // top: |
| // LXVD2X (R0)(R21),VS32 |
| // LXVD2X (R31)(R21),VS33 |
| // ADD $32,R21 |
| // STXVD2X VS32,(R0)(R20) |
| // STXVD2X VS33,(R31)(R20) |
| // ADD $32,R20 |
| // BC 16,0,top |
| // Bytes not moved by this loop are moved |
| // with a combination of the following instructions, |
| // starting with the largest sizes and generating as |
| // many as needed, using the appropriate offset value. |
| // MOVD n(R21),R31 |
| // MOVD R31,n(R20) |
| // MOVW n1(R21),R31 |
| // MOVW R31,n1(R20) |
| // MOVH n2(R21),R31 |
| // MOVH R31,n2(R20) |
| // MOVB n3(R21),R31 |
| // MOVB R31,n3(R20) |
| |
| // Each loop iteration moves 32 bytes |
| ctr := v.AuxInt / bytesPerLoop |
| |
| // Remainder after the loop |
| rem := v.AuxInt % bytesPerLoop |
| |
| dstReg := v.Args[0].Reg() |
| srcReg := v.Args[1].Reg() |
| |
| // The set of registers used here, must match the clobbered reg list |
| // in PPC64Ops.go. |
| offset := int64(0) |
| |
| // top of the loop |
| var top *obj.Prog |
| // Only generate looping code when loop counter is > 1 for >= 64 bytes |
| if ctr > 1 { |
| // Set up the CTR |
| p := s.Prog(ppc64.AMOVD) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = ctr |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REGTMP |
| |
| p = s.Prog(ppc64.AMOVD) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REGTMP |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_CTR |
| |
| // Use REGTMP as index reg |
| p = s.Prog(ppc64.AMOVD) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = 16 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REGTMP |
| |
| // Don't adding padding for |
| // alignment with small iteration |
| // counts. |
| if ctr > 3 { |
| p = s.Prog(obj.APCALIGN) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = 16 |
| } |
| |
| // Generate 16 byte loads and stores. |
| // Use temp register for index (16) |
| // on the second one. |
| |
| p = s.Prog(ppc64.ALXVD2X) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = srcReg |
| p.From.Index = ppc64.REGZERO |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_VS32 |
| if top == nil { |
| top = p |
| } |
| p = s.Prog(ppc64.ALXVD2X) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = srcReg |
| p.From.Index = ppc64.REGTMP |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_VS33 |
| |
| // increment the src reg for next iteration |
| p = s.Prog(ppc64.AADD) |
| p.Reg = srcReg |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = bytesPerLoop |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = srcReg |
| |
| // generate 16 byte stores |
| p = s.Prog(ppc64.ASTXVD2X) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS32 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = dstReg |
| p.To.Index = ppc64.REGZERO |
| |
| p = s.Prog(ppc64.ASTXVD2X) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS33 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = dstReg |
| p.To.Index = ppc64.REGTMP |
| |
| // increment the dst reg for next iteration |
| p = s.Prog(ppc64.AADD) |
| p.Reg = dstReg |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = bytesPerLoop |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = dstReg |
| |
| // BC with BO_BCTR generates bdnz to branch on nonzero CTR |
| // to loop top. |
| p = s.Prog(ppc64.ABC) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = ppc64.BO_BCTR |
| p.Reg = ppc64.REG_R0 |
| p.To.Type = obj.TYPE_BRANCH |
| gc.Patch(p, top) |
| |
| // srcReg and dstReg were incremented in the loop, so |
| // later instructions start with offset 0. |
| offset = int64(0) |
| } |
| |
| // No loop was generated for one iteration, so |
| // add 32 bytes to the remainder to move those bytes. |
| if ctr == 1 { |
| rem += bytesPerLoop |
| } |
| |
| if rem >= 16 { |
| // Generate 16 byte loads and stores. |
| // Use temp register for index (value 16) |
| // on the second one. |
| p := s.Prog(ppc64.ALXVD2X) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = srcReg |
| p.From.Index = ppc64.REGZERO |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_VS32 |
| |
| p = s.Prog(ppc64.ASTXVD2X) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS32 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = dstReg |
| p.To.Index = ppc64.REGZERO |
| |
| offset = 16 |
| rem -= 16 |
| |
| if rem >= 16 { |
| // Use REGTMP as index reg |
| p := s.Prog(ppc64.AMOVD) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = 16 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REGTMP |
| |
| p = s.Prog(ppc64.ALXVD2X) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = srcReg |
| p.From.Index = ppc64.REGTMP |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_VS32 |
| |
| p = s.Prog(ppc64.ASTXVD2X) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS32 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = dstReg |
| p.To.Index = ppc64.REGTMP |
| |
| offset = 32 |
| rem -= 16 |
| } |
| } |
| |
| // Generate all the remaining load and store pairs, starting with |
| // as many 8 byte moves as possible, then 4, 2, 1. |
| for rem > 0 { |
| op, size := ppc64.AMOVB, int64(1) |
| switch { |
| case rem >= 8: |
| op, size = ppc64.AMOVD, 8 |
| case rem >= 4: |
| op, size = ppc64.AMOVW, 4 |
| case rem >= 2: |
| op, size = ppc64.AMOVH, 2 |
| } |
| // Load |
| p := s.Prog(op) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REGTMP |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = srcReg |
| p.From.Offset = offset |
| |
| // Store |
| p = s.Prog(op) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REGTMP |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = dstReg |
| p.To.Offset = offset |
| rem -= size |
| offset += size |
| } |
| |
| case ssa.OpPPC64LoweredQuadMove, ssa.OpPPC64LoweredQuadMoveShort: |
| bytesPerLoop := int64(64) |
| // This is used when moving more |
| // than 8 bytes on power9. Moves start with |
| // as many 8 byte moves as possible, then |
| // 4, 2, or 1 byte(s) as remaining. This will |
| // work and be efficient for power8 or later. |
| // If there are 64 or more bytes, then a |
| // loop is generated to move 32 bytes and |
| // update the src and dst addresses on each |
| // iteration. When < 64 bytes, the appropriate |
| // number of moves are generated based on the |
| // size. |
| // When moving >= 64 bytes a loop is used |
| // MOVD len/32,REG_TMP |
| // MOVD REG_TMP,CTR |
| // top: |
| // LXV 0(R21),VS32 |
| // LXV 16(R21),VS33 |
| // ADD $32,R21 |
| // STXV VS32,0(R20) |
| // STXV VS33,16(R20) |
| // ADD $32,R20 |
| // BC 16,0,top |
| // Bytes not moved by this loop are moved |
| // with a combination of the following instructions, |
| // starting with the largest sizes and generating as |
| // many as needed, using the appropriate offset value. |
| // MOVD n(R21),R31 |
| // MOVD R31,n(R20) |
| // MOVW n1(R21),R31 |
| // MOVW R31,n1(R20) |
| // MOVH n2(R21),R31 |
| // MOVH R31,n2(R20) |
| // MOVB n3(R21),R31 |
| // MOVB R31,n3(R20) |
| |
| // Each loop iteration moves 32 bytes |
| ctr := v.AuxInt / bytesPerLoop |
| |
| // Remainder after the loop |
| rem := v.AuxInt % bytesPerLoop |
| |
| dstReg := v.Args[0].Reg() |
| srcReg := v.Args[1].Reg() |
| |
| offset := int64(0) |
| |
| // top of the loop |
| var top *obj.Prog |
| |
| // Only generate looping code when loop counter is > 1 for >= 64 bytes |
| if ctr > 1 { |
| // Set up the CTR |
| p := s.Prog(ppc64.AMOVD) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = ctr |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REGTMP |
| |
| p = s.Prog(ppc64.AMOVD) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REGTMP |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_CTR |
| |
| p = s.Prog(obj.APCALIGN) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = 16 |
| |
| // Generate 16 byte loads and stores. |
| p = s.Prog(ppc64.ALXV) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = srcReg |
| p.From.Offset = offset |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_VS32 |
| if top == nil { |
| top = p |
| } |
| p = s.Prog(ppc64.ALXV) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = srcReg |
| p.From.Offset = offset + 16 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_VS33 |
| |
| // generate 16 byte stores |
| p = s.Prog(ppc64.ASTXV) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS32 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = dstReg |
| p.To.Offset = offset |
| |
| p = s.Prog(ppc64.ASTXV) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS33 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = dstReg |
| p.To.Offset = offset + 16 |
| |
| // Generate 16 byte loads and stores. |
| p = s.Prog(ppc64.ALXV) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = srcReg |
| p.From.Offset = offset + 32 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_VS32 |
| |
| p = s.Prog(ppc64.ALXV) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = srcReg |
| p.From.Offset = offset + 48 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_VS33 |
| |
| // generate 16 byte stores |
| p = s.Prog(ppc64.ASTXV) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS32 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = dstReg |
| p.To.Offset = offset + 32 |
| |
| p = s.Prog(ppc64.ASTXV) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS33 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = dstReg |
| p.To.Offset = offset + 48 |
| |
| // increment the src reg for next iteration |
| p = s.Prog(ppc64.AADD) |
| p.Reg = srcReg |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = bytesPerLoop |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = srcReg |
| |
| // increment the dst reg for next iteration |
| p = s.Prog(ppc64.AADD) |
| p.Reg = dstReg |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = bytesPerLoop |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = dstReg |
| |
| // BC with BO_BCTR generates bdnz to branch on nonzero CTR |
| // to loop top. |
| p = s.Prog(ppc64.ABC) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = ppc64.BO_BCTR |
| p.Reg = ppc64.REG_R0 |
| p.To.Type = obj.TYPE_BRANCH |
| gc.Patch(p, top) |
| |
| // srcReg and dstReg were incremented in the loop, so |
| // later instructions start with offset 0. |
| offset = int64(0) |
| } |
| |
| // No loop was generated for one iteration, so |
| // add 32 bytes to the remainder to move those bytes. |
| if ctr == 1 { |
| rem += bytesPerLoop |
| } |
| if rem >= 32 { |
| p := s.Prog(ppc64.ALXV) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = srcReg |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_VS32 |
| |
| p = s.Prog(ppc64.ALXV) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = srcReg |
| p.From.Offset = 16 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_VS33 |
| |
| p = s.Prog(ppc64.ASTXV) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS32 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = dstReg |
| |
| p = s.Prog(ppc64.ASTXV) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS33 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = dstReg |
| p.To.Offset = 16 |
| |
| offset = 32 |
| rem -= 32 |
| } |
| |
| if rem >= 16 { |
| // Generate 16 byte loads and stores. |
| p := s.Prog(ppc64.ALXV) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = srcReg |
| p.From.Offset = offset |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_VS32 |
| |
| p = s.Prog(ppc64.ASTXV) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS32 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = dstReg |
| p.To.Offset = offset |
| |
| offset += 16 |
| rem -= 16 |
| |
| if rem >= 16 { |
| p := s.Prog(ppc64.ALXV) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = srcReg |
| p.From.Offset = offset |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_VS32 |
| |
| p = s.Prog(ppc64.ASTXV) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_VS32 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = dstReg |
| p.To.Offset = offset |
| |
| offset += 16 |
| rem -= 16 |
| } |
| } |
| // Generate all the remaining load and store pairs, starting with |
| // as many 8 byte moves as possible, then 4, 2, 1. |
| for rem > 0 { |
| op, size := ppc64.AMOVB, int64(1) |
| switch { |
| case rem >= 8: |
| op, size = ppc64.AMOVD, 8 |
| case rem >= 4: |
| op, size = ppc64.AMOVW, 4 |
| case rem >= 2: |
| op, size = ppc64.AMOVH, 2 |
| } |
| // Load |
| p := s.Prog(op) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REGTMP |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = srcReg |
| p.From.Offset = offset |
| |
| // Store |
| p = s.Prog(op) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REGTMP |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = dstReg |
| p.To.Offset = offset |
| rem -= size |
| offset += size |
| } |
| |
| case ssa.OpPPC64CALLstatic: |
| s.Call(v) |
| |
| case ssa.OpPPC64CALLclosure, ssa.OpPPC64CALLinter: |
| p := s.Prog(ppc64.AMOVD) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[0].Reg() |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_LR |
| |
| if v.Args[0].Reg() != ppc64.REG_R12 { |
| v.Fatalf("Function address for %v should be in R12 %d but is in %d", v.LongString(), ppc64.REG_R12, p.From.Reg) |
| } |
| |
| pp := s.Call(v) |
| pp.To.Reg = ppc64.REG_LR |
| |
| if gc.Ctxt.Flag_shared { |
| // When compiling Go into PIC, the function we just |
| // called via pointer might have been implemented in |
| // a separate module and so overwritten the TOC |
| // pointer in R2; reload it. |
| q := s.Prog(ppc64.AMOVD) |
| q.From.Type = obj.TYPE_MEM |
| q.From.Offset = 24 |
| q.From.Reg = ppc64.REGSP |
| q.To.Type = obj.TYPE_REG |
| q.To.Reg = ppc64.REG_R2 |
| } |
| |
| case ssa.OpPPC64LoweredWB: |
| p := s.Prog(obj.ACALL) |
| p.To.Type = obj.TYPE_MEM |
| p.To.Name = obj.NAME_EXTERN |
| p.To.Sym = v.Aux.(*obj.LSym) |
| |
| case ssa.OpPPC64LoweredPanicBoundsA, ssa.OpPPC64LoweredPanicBoundsB, ssa.OpPPC64LoweredPanicBoundsC: |
| p := s.Prog(obj.ACALL) |
| p.To.Type = obj.TYPE_MEM |
| p.To.Name = obj.NAME_EXTERN |
| p.To.Sym = gc.BoundsCheckFunc[v.AuxInt] |
| s.UseArgs(16) // space used in callee args area by assembly stubs |
| |
| case ssa.OpPPC64LoweredNilCheck: |
| if objabi.GOOS == "aix" { |
| // CMP Rarg0, R0 |
| // BNE 2(PC) |
| // STW R0, 0(R0) |
| // NOP (so the BNE has somewhere to land) |
| |
| // CMP Rarg0, R0 |
| p := s.Prog(ppc64.ACMP) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[0].Reg() |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_R0 |
| |
| // BNE 2(PC) |
| p2 := s.Prog(ppc64.ABNE) |
| p2.To.Type = obj.TYPE_BRANCH |
| |
| // STW R0, 0(R0) |
| // Write at 0 is forbidden and will trigger a SIGSEGV |
| p = s.Prog(ppc64.AMOVW) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_R0 |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = ppc64.REG_R0 |
| |
| // NOP (so the BNE has somewhere to land) |
| nop := s.Prog(obj.ANOP) |
| gc.Patch(p2, nop) |
| |
| } else { |
| // Issue a load which will fault if arg is nil. |
| p := s.Prog(ppc64.AMOVBZ) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = v.Args[0].Reg() |
| gc.AddAux(&p.From, v) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REGTMP |
| } |
| if logopt.Enabled() { |
| logopt.LogOpt(v.Pos, "nilcheck", "genssa", v.Block.Func.Name) |
| } |
| if gc.Debug_checknil != 0 && v.Pos.Line() > 1 { // v.Pos.Line()==1 in generated wrappers |
| gc.Warnl(v.Pos, "generated nil check") |
| } |
| |
| // These should be resolved by rules and not make it here. |
| case ssa.OpPPC64Equal, ssa.OpPPC64NotEqual, ssa.OpPPC64LessThan, ssa.OpPPC64FLessThan, |
| ssa.OpPPC64LessEqual, ssa.OpPPC64GreaterThan, ssa.OpPPC64FGreaterThan, ssa.OpPPC64GreaterEqual, |
| ssa.OpPPC64FLessEqual, ssa.OpPPC64FGreaterEqual: |
| v.Fatalf("Pseudo-op should not make it to codegen: %s ###\n", v.LongString()) |
| case ssa.OpPPC64InvertFlags: |
| v.Fatalf("InvertFlags should never make it to codegen %v", v.LongString()) |
| case ssa.OpPPC64FlagEQ, ssa.OpPPC64FlagLT, ssa.OpPPC64FlagGT: |
| v.Fatalf("Flag* ops should never make it to codegen %v", v.LongString()) |
| case ssa.OpClobber: |
| // TODO: implement for clobberdead experiment. Nop is ok for now. |
| default: |
| v.Fatalf("genValue not implemented: %s", v.LongString()) |
| } |
| } |
| |
| var blockJump = [...]struct { |
| asm, invasm obj.As |
| asmeq, invasmun bool |
| }{ |
| ssa.BlockPPC64EQ: {ppc64.ABEQ, ppc64.ABNE, false, false}, |
| ssa.BlockPPC64NE: {ppc64.ABNE, ppc64.ABEQ, false, false}, |
| |
| ssa.BlockPPC64LT: {ppc64.ABLT, ppc64.ABGE, false, false}, |
| ssa.BlockPPC64GE: {ppc64.ABGE, ppc64.ABLT, false, false}, |
| ssa.BlockPPC64LE: {ppc64.ABLE, ppc64.ABGT, false, false}, |
| ssa.BlockPPC64GT: {ppc64.ABGT, ppc64.ABLE, false, false}, |
| |
| // TODO: need to work FP comparisons into block jumps |
| ssa.BlockPPC64FLT: {ppc64.ABLT, ppc64.ABGE, false, false}, |
| ssa.BlockPPC64FGE: {ppc64.ABGT, ppc64.ABLT, true, true}, // GE = GT or EQ; !GE = LT or UN |
| ssa.BlockPPC64FLE: {ppc64.ABLT, ppc64.ABGT, true, true}, // LE = LT or EQ; !LE = GT or UN |
| ssa.BlockPPC64FGT: {ppc64.ABGT, ppc64.ABLE, false, false}, |
| } |
| |
| func ssaGenBlock(s *gc.SSAGenState, b, next *ssa.Block) { |
| switch b.Kind { |
| case ssa.BlockDefer: |
| // defer returns in R3: |
| // 0 if we should continue executing |
| // 1 if we should jump to deferreturn call |
| p := s.Prog(ppc64.ACMP) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = ppc64.REG_R3 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = ppc64.REG_R0 |
| |
| p = s.Prog(ppc64.ABNE) |
| p.To.Type = obj.TYPE_BRANCH |
| s.Branches = append(s.Branches, gc.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, gc.Branch{P: p, B: b.Succs[0].Block()}) |
| } |
| |
| 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, gc.Branch{P: p, B: b.Succs[0].Block()}) |
| } |
| case ssa.BlockExit: |
| case ssa.BlockRet: |
| s.Prog(obj.ARET) |
| case ssa.BlockRetJmp: |
| p := s.Prog(obj.AJMP) |
| p.To.Type = obj.TYPE_MEM |
| p.To.Name = obj.NAME_EXTERN |
| p.To.Sym = b.Aux.(*obj.LSym) |
| |
| case ssa.BlockPPC64EQ, ssa.BlockPPC64NE, |
| ssa.BlockPPC64LT, ssa.BlockPPC64GE, |
| ssa.BlockPPC64LE, ssa.BlockPPC64GT, |
| ssa.BlockPPC64FLT, ssa.BlockPPC64FGE, |
| ssa.BlockPPC64FLE, ssa.BlockPPC64FGT: |
| jmp := blockJump[b.Kind] |
| switch next { |
| case b.Succs[0].Block(): |
| s.Br(jmp.invasm, b.Succs[1].Block()) |
| if jmp.invasmun { |
| // TODO: The second branch is probably predict-not-taken since it is for FP unordered |
| s.Br(ppc64.ABVS, b.Succs[1].Block()) |
| } |
| case b.Succs[1].Block(): |
| s.Br(jmp.asm, b.Succs[0].Block()) |
| if jmp.asmeq { |
| s.Br(ppc64.ABEQ, b.Succs[0].Block()) |
| } |
| default: |
| if b.Likely != ssa.BranchUnlikely { |
| s.Br(jmp.asm, b.Succs[0].Block()) |
| if jmp.asmeq { |
| s.Br(ppc64.ABEQ, b.Succs[0].Block()) |
| } |
| s.Br(obj.AJMP, b.Succs[1].Block()) |
| } else { |
| s.Br(jmp.invasm, b.Succs[1].Block()) |
| if jmp.invasmun { |
| // TODO: The second branch is probably predict-not-taken since it is for FP unordered |
| s.Br(ppc64.ABVS, b.Succs[1].Block()) |
| } |
| s.Br(obj.AJMP, b.Succs[0].Block()) |
| } |
| } |
| default: |
| b.Fatalf("branch not implemented: %s", b.LongString()) |
| } |
| } |
