| // 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 s390x |
| |
| import ( |
| "math" |
| |
| "cmd/compile/internal/base" |
| "cmd/compile/internal/logopt" |
| "cmd/compile/internal/ssa" |
| "cmd/compile/internal/ssagen" |
| "cmd/compile/internal/types" |
| "cmd/internal/obj" |
| "cmd/internal/obj/s390x" |
| ) |
| |
| // markMoves marks any MOVXconst ops that need to avoid clobbering flags. |
| func ssaMarkMoves(s *ssagen.State, b *ssa.Block) { |
| flive := b.FlagsLiveAtEnd |
| for _, c := range b.ControlValues() { |
| flive = c.Type.IsFlags() || flive |
| } |
| for i := len(b.Values) - 1; i >= 0; i-- { |
| v := b.Values[i] |
| if flive && v.Op == ssa.OpS390XMOVDconst { |
| // 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 s390x.AFMOVS |
| case 8: |
| return s390x.AFMOVD |
| } |
| } else { |
| switch t.Size() { |
| case 1: |
| if t.IsSigned() { |
| return s390x.AMOVB |
| } else { |
| return s390x.AMOVBZ |
| } |
| case 2: |
| if t.IsSigned() { |
| return s390x.AMOVH |
| } else { |
| return s390x.AMOVHZ |
| } |
| case 4: |
| if t.IsSigned() { |
| return s390x.AMOVW |
| } else { |
| return s390x.AMOVWZ |
| } |
| case 8: |
| return s390x.AMOVD |
| } |
| } |
| panic("bad load type") |
| } |
| |
| // storeByType returns the store instruction of the given type. |
| func storeByType(t *types.Type) obj.As { |
| width := t.Size() |
| if t.IsFloat() { |
| switch width { |
| case 4: |
| return s390x.AFMOVS |
| case 8: |
| return s390x.AFMOVD |
| } |
| } else { |
| switch width { |
| case 1: |
| return s390x.AMOVB |
| case 2: |
| return s390x.AMOVH |
| case 4: |
| return s390x.AMOVW |
| case 8: |
| return s390x.AMOVD |
| } |
| } |
| panic("bad store type") |
| } |
| |
| // moveByType returns the reg->reg move instruction of the given type. |
| func moveByType(t *types.Type) obj.As { |
| if t.IsFloat() { |
| return s390x.AFMOVD |
| } else { |
| switch t.Size() { |
| case 1: |
| if t.IsSigned() { |
| return s390x.AMOVB |
| } else { |
| return s390x.AMOVBZ |
| } |
| case 2: |
| if t.IsSigned() { |
| return s390x.AMOVH |
| } else { |
| return s390x.AMOVHZ |
| } |
| case 4: |
| if t.IsSigned() { |
| return s390x.AMOVW |
| } else { |
| return s390x.AMOVWZ |
| } |
| case 8: |
| return s390x.AMOVD |
| } |
| } |
| panic("bad load type") |
| } |
| |
| // opregreg emits instructions for |
| // dest := dest(To) op src(From) |
| // and also returns the created obj.Prog so it |
| // may be further adjusted (offset, scale, etc). |
| func opregreg(s *ssagen.State, op obj.As, dest, src int16) *obj.Prog { |
| p := s.Prog(op) |
| p.From.Type = obj.TYPE_REG |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = dest |
| p.From.Reg = src |
| return p |
| } |
| |
| // opregregimm emits instructions for |
| // dest := src(From) op off |
| // and also returns the created obj.Prog so it |
| // may be further adjusted (offset, scale, etc). |
| func opregregimm(s *ssagen.State, op obj.As, dest, src int16, off int64) *obj.Prog { |
| p := s.Prog(op) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = off |
| p.Reg = src |
| p.To.Reg = dest |
| p.To.Type = obj.TYPE_REG |
| return p |
| } |
| |
| func ssaGenValue(s *ssagen.State, v *ssa.Value) { |
| switch v.Op { |
| case ssa.OpS390XSLD, ssa.OpS390XSLW, |
| ssa.OpS390XSRD, ssa.OpS390XSRW, |
| ssa.OpS390XSRAD, ssa.OpS390XSRAW, |
| ssa.OpS390XRLLG, ssa.OpS390XRLL: |
| r := v.Reg() |
| r1 := v.Args[0].Reg() |
| r2 := v.Args[1].Reg() |
| if r2 == s390x.REG_R0 { |
| v.Fatalf("cannot use R0 as shift value %s", v.LongString()) |
| } |
| p := opregreg(s, v.Op.Asm(), r, r2) |
| if r != r1 { |
| p.Reg = r1 |
| } |
| case ssa.OpS390XRXSBG: |
| r2 := v.Args[1].Reg() |
| i := v.Aux.(s390x.RotateParams) |
| p := s.Prog(v.Op.Asm()) |
| p.From = obj.Addr{Type: obj.TYPE_CONST, Offset: int64(i.Start)} |
| p.SetRestArgs([]obj.Addr{ |
| {Type: obj.TYPE_CONST, Offset: int64(i.End)}, |
| {Type: obj.TYPE_CONST, Offset: int64(i.Amount)}, |
| {Type: obj.TYPE_REG, Reg: r2}, |
| }) |
| p.To = obj.Addr{Type: obj.TYPE_REG, Reg: v.Reg()} |
| case ssa.OpS390XRISBGZ: |
| r1 := v.Reg() |
| r2 := v.Args[0].Reg() |
| i := v.Aux.(s390x.RotateParams) |
| p := s.Prog(v.Op.Asm()) |
| p.From = obj.Addr{Type: obj.TYPE_CONST, Offset: int64(i.Start)} |
| p.SetRestArgs([]obj.Addr{ |
| {Type: obj.TYPE_CONST, Offset: int64(i.End)}, |
| {Type: obj.TYPE_CONST, Offset: int64(i.Amount)}, |
| {Type: obj.TYPE_REG, Reg: r2}, |
| }) |
| p.To = obj.Addr{Type: obj.TYPE_REG, Reg: r1} |
| case ssa.OpS390XADD, ssa.OpS390XADDW, |
| ssa.OpS390XSUB, ssa.OpS390XSUBW, |
| ssa.OpS390XAND, ssa.OpS390XANDW, |
| ssa.OpS390XOR, ssa.OpS390XORW, |
| ssa.OpS390XXOR, ssa.OpS390XXORW: |
| r := v.Reg() |
| r1 := v.Args[0].Reg() |
| r2 := v.Args[1].Reg() |
| p := opregreg(s, v.Op.Asm(), r, r2) |
| if r != r1 { |
| p.Reg = r1 |
| } |
| case ssa.OpS390XADDC: |
| r1 := v.Reg0() |
| r2 := v.Args[0].Reg() |
| r3 := v.Args[1].Reg() |
| if r1 == r2 { |
| r2, r3 = r3, r2 |
| } |
| p := opregreg(s, v.Op.Asm(), r1, r2) |
| if r3 != r1 { |
| p.Reg = r3 |
| } |
| case ssa.OpS390XSUBC: |
| r1 := v.Reg0() |
| r2 := v.Args[0].Reg() |
| r3 := v.Args[1].Reg() |
| p := opregreg(s, v.Op.Asm(), r1, r3) |
| if r1 != r2 { |
| p.Reg = r2 |
| } |
| case ssa.OpS390XADDE, ssa.OpS390XSUBE: |
| r2 := v.Args[1].Reg() |
| opregreg(s, v.Op.Asm(), v.Reg0(), r2) |
| case ssa.OpS390XADDCconst: |
| r1 := v.Reg0() |
| r3 := v.Args[0].Reg() |
| i2 := int64(int16(v.AuxInt)) |
| opregregimm(s, v.Op.Asm(), r1, r3, i2) |
| // 2-address opcode arithmetic |
| case ssa.OpS390XMULLD, ssa.OpS390XMULLW, |
| ssa.OpS390XMULHD, ssa.OpS390XMULHDU, |
| ssa.OpS390XFMULS, ssa.OpS390XFMUL, ssa.OpS390XFDIVS, ssa.OpS390XFDIV: |
| opregreg(s, v.Op.Asm(), v.Reg(), v.Args[1].Reg()) |
| case ssa.OpS390XFSUBS, ssa.OpS390XFSUB, |
| ssa.OpS390XFADDS, ssa.OpS390XFADD: |
| opregreg(s, v.Op.Asm(), v.Reg0(), v.Args[1].Reg()) |
| case ssa.OpS390XMLGR: |
| // MLGR Rx R3 -> R2:R3 |
| r0 := v.Args[0].Reg() |
| r1 := v.Args[1].Reg() |
| if r1 != s390x.REG_R3 { |
| v.Fatalf("We require the multiplcand to be stored in R3 for MLGR %s", v.LongString()) |
| } |
| p := s.Prog(s390x.AMLGR) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = r0 |
| p.To.Reg = s390x.REG_R2 |
| p.To.Type = obj.TYPE_REG |
| case ssa.OpS390XFMADD, ssa.OpS390XFMADDS, |
| ssa.OpS390XFMSUB, ssa.OpS390XFMSUBS: |
| r1 := v.Args[1].Reg() |
| r2 := v.Args[2].Reg() |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = r1 |
| p.Reg = r2 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| case ssa.OpS390XFIDBR: |
| switch v.AuxInt { |
| case 0, 1, 3, 4, 5, 6, 7: |
| opregregimm(s, v.Op.Asm(), v.Reg(), v.Args[0].Reg(), v.AuxInt) |
| default: |
| v.Fatalf("invalid FIDBR mask: %v", v.AuxInt) |
| } |
| case ssa.OpS390XCPSDR: |
| p := opregreg(s, v.Op.Asm(), v.Reg(), v.Args[1].Reg()) |
| p.Reg = v.Args[0].Reg() |
| case ssa.OpS390XDIVD, ssa.OpS390XDIVW, |
| ssa.OpS390XDIVDU, ssa.OpS390XDIVWU, |
| ssa.OpS390XMODD, ssa.OpS390XMODW, |
| ssa.OpS390XMODDU, ssa.OpS390XMODWU: |
| |
| // TODO(mundaym): use the temp registers every time like x86 does with AX? |
| dividend := v.Args[0].Reg() |
| divisor := v.Args[1].Reg() |
| |
| // CPU faults upon signed overflow, which occurs when most |
| // negative int is divided by -1. |
| var j *obj.Prog |
| if v.Op == ssa.OpS390XDIVD || v.Op == ssa.OpS390XDIVW || |
| v.Op == ssa.OpS390XMODD || v.Op == ssa.OpS390XMODW { |
| |
| var c *obj.Prog |
| c = s.Prog(s390x.ACMP) |
| j = s.Prog(s390x.ABEQ) |
| |
| c.From.Type = obj.TYPE_REG |
| c.From.Reg = divisor |
| c.To.Type = obj.TYPE_CONST |
| c.To.Offset = -1 |
| |
| j.To.Type = obj.TYPE_BRANCH |
| |
| } |
| |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = divisor |
| p.Reg = 0 |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = dividend |
| |
| // signed division, rest of the check for -1 case |
| if j != nil { |
| j2 := s.Prog(s390x.ABR) |
| j2.To.Type = obj.TYPE_BRANCH |
| |
| var n *obj.Prog |
| if v.Op == ssa.OpS390XDIVD || v.Op == ssa.OpS390XDIVW { |
| // n * -1 = -n |
| n = s.Prog(s390x.ANEG) |
| n.To.Type = obj.TYPE_REG |
| n.To.Reg = dividend |
| } else { |
| // n % -1 == 0 |
| n = s.Prog(s390x.AXOR) |
| n.From.Type = obj.TYPE_REG |
| n.From.Reg = dividend |
| n.To.Type = obj.TYPE_REG |
| n.To.Reg = dividend |
| } |
| |
| j.To.SetTarget(n) |
| j2.To.SetTarget(s.Pc()) |
| } |
| case ssa.OpS390XADDconst, ssa.OpS390XADDWconst: |
| opregregimm(s, v.Op.Asm(), v.Reg(), v.Args[0].Reg(), v.AuxInt) |
| case ssa.OpS390XMULLDconst, ssa.OpS390XMULLWconst, |
| ssa.OpS390XSUBconst, ssa.OpS390XSUBWconst, |
| ssa.OpS390XANDconst, ssa.OpS390XANDWconst, |
| ssa.OpS390XORconst, ssa.OpS390XORWconst, |
| ssa.OpS390XXORconst, ssa.OpS390XXORWconst: |
| 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.OpS390XSLDconst, ssa.OpS390XSLWconst, |
| ssa.OpS390XSRDconst, ssa.OpS390XSRWconst, |
| ssa.OpS390XSRADconst, ssa.OpS390XSRAWconst, |
| ssa.OpS390XRLLconst: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = v.AuxInt |
| r := v.Reg() |
| r1 := v.Args[0].Reg() |
| if r != r1 { |
| p.Reg = r1 |
| } |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = r |
| case ssa.OpS390XMOVDaddridx: |
| r := v.Args[0].Reg() |
| i := v.Args[1].Reg() |
| p := s.Prog(s390x.AMOVD) |
| p.From.Scale = 1 |
| if i == s390x.REGSP { |
| r, i = i, r |
| } |
| p.From.Type = obj.TYPE_ADDR |
| p.From.Reg = r |
| p.From.Index = i |
| ssagen.AddAux(&p.From, v) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| case ssa.OpS390XMOVDaddr: |
| p := s.Prog(s390x.AMOVD) |
| p.From.Type = obj.TYPE_ADDR |
| 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.OpS390XCMP, ssa.OpS390XCMPW, ssa.OpS390XCMPU, ssa.OpS390XCMPWU: |
| opregreg(s, v.Op.Asm(), v.Args[1].Reg(), v.Args[0].Reg()) |
| case ssa.OpS390XFCMPS, ssa.OpS390XFCMP: |
| opregreg(s, v.Op.Asm(), v.Args[1].Reg(), v.Args[0].Reg()) |
| case ssa.OpS390XCMPconst, ssa.OpS390XCMPWconst: |
| 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.OpS390XCMPUconst, ssa.OpS390XCMPWUconst: |
| 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 = int64(uint32(v.AuxInt)) |
| case ssa.OpS390XMOVDconst: |
| x := 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 = x |
| case ssa.OpS390XFMOVSconst, ssa.OpS390XFMOVDconst: |
| x := v.Reg() |
| 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 = x |
| case ssa.OpS390XADDWload, ssa.OpS390XADDload, |
| ssa.OpS390XMULLWload, ssa.OpS390XMULLDload, |
| ssa.OpS390XSUBWload, ssa.OpS390XSUBload, |
| ssa.OpS390XANDWload, ssa.OpS390XANDload, |
| ssa.OpS390XORWload, ssa.OpS390XORload, |
| ssa.OpS390XXORWload, ssa.OpS390XXORload: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = v.Args[1].Reg() |
| ssagen.AddAux(&p.From, v) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| case ssa.OpS390XMOVDload, |
| ssa.OpS390XMOVWZload, ssa.OpS390XMOVHZload, ssa.OpS390XMOVBZload, |
| ssa.OpS390XMOVDBRload, ssa.OpS390XMOVWBRload, ssa.OpS390XMOVHBRload, |
| ssa.OpS390XMOVBload, ssa.OpS390XMOVHload, ssa.OpS390XMOVWload, |
| ssa.OpS390XFMOVSload, ssa.OpS390XFMOVDload: |
| 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.OpS390XMOVBZloadidx, ssa.OpS390XMOVHZloadidx, ssa.OpS390XMOVWZloadidx, |
| ssa.OpS390XMOVBloadidx, ssa.OpS390XMOVHloadidx, ssa.OpS390XMOVWloadidx, ssa.OpS390XMOVDloadidx, |
| ssa.OpS390XMOVHBRloadidx, ssa.OpS390XMOVWBRloadidx, ssa.OpS390XMOVDBRloadidx, |
| ssa.OpS390XFMOVSloadidx, ssa.OpS390XFMOVDloadidx: |
| r := v.Args[0].Reg() |
| i := v.Args[1].Reg() |
| if i == s390x.REGSP { |
| r, i = i, r |
| } |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_MEM |
| p.From.Reg = r |
| p.From.Scale = 1 |
| p.From.Index = i |
| ssagen.AddAux(&p.From, v) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| case ssa.OpS390XMOVBstore, ssa.OpS390XMOVHstore, ssa.OpS390XMOVWstore, ssa.OpS390XMOVDstore, |
| ssa.OpS390XMOVHBRstore, ssa.OpS390XMOVWBRstore, ssa.OpS390XMOVDBRstore, |
| ssa.OpS390XFMOVSstore, ssa.OpS390XFMOVDstore: |
| 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.OpS390XMOVBstoreidx, ssa.OpS390XMOVHstoreidx, ssa.OpS390XMOVWstoreidx, ssa.OpS390XMOVDstoreidx, |
| ssa.OpS390XMOVHBRstoreidx, ssa.OpS390XMOVWBRstoreidx, ssa.OpS390XMOVDBRstoreidx, |
| ssa.OpS390XFMOVSstoreidx, ssa.OpS390XFMOVDstoreidx: |
| r := v.Args[0].Reg() |
| i := v.Args[1].Reg() |
| if i == s390x.REGSP { |
| r, i = i, r |
| } |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[2].Reg() |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = r |
| p.To.Scale = 1 |
| p.To.Index = i |
| ssagen.AddAux(&p.To, v) |
| case ssa.OpS390XMOVDstoreconst, ssa.OpS390XMOVWstoreconst, ssa.OpS390XMOVHstoreconst, ssa.OpS390XMOVBstoreconst: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_CONST |
| sc := v.AuxValAndOff() |
| p.From.Offset = sc.Val64() |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| ssagen.AddAux2(&p.To, v, sc.Off64()) |
| case ssa.OpS390XMOVBreg, ssa.OpS390XMOVHreg, ssa.OpS390XMOVWreg, |
| ssa.OpS390XMOVBZreg, ssa.OpS390XMOVHZreg, ssa.OpS390XMOVWZreg, |
| ssa.OpS390XLDGR, ssa.OpS390XLGDR, |
| ssa.OpS390XCEFBRA, ssa.OpS390XCDFBRA, ssa.OpS390XCEGBRA, ssa.OpS390XCDGBRA, |
| ssa.OpS390XCFEBRA, ssa.OpS390XCFDBRA, ssa.OpS390XCGEBRA, ssa.OpS390XCGDBRA, |
| ssa.OpS390XCELFBR, ssa.OpS390XCDLFBR, ssa.OpS390XCELGBR, ssa.OpS390XCDLGBR, |
| ssa.OpS390XCLFEBR, ssa.OpS390XCLFDBR, ssa.OpS390XCLGEBR, ssa.OpS390XCLGDBR, |
| ssa.OpS390XLDEBR, ssa.OpS390XLEDBR, |
| ssa.OpS390XFNEG, ssa.OpS390XFNEGS, |
| ssa.OpS390XLPDFR, ssa.OpS390XLNDFR: |
| opregreg(s, v.Op.Asm(), v.Reg(), v.Args[0].Reg()) |
| case ssa.OpS390XCLEAR: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_CONST |
| sc := v.AuxValAndOff() |
| p.From.Offset = sc.Val64() |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| ssagen.AddAux2(&p.To, v, sc.Off64()) |
| case ssa.OpCopy: |
| if v.Type.IsMemory() { |
| return |
| } |
| x := v.Args[0].Reg() |
| y := v.Reg() |
| if x != y { |
| opregreg(s, moveByType(v.Type), y, x) |
| } |
| case ssa.OpLoadReg: |
| if v.Type.IsFlags() { |
| v.Fatalf("load flags not implemented: %v", v.LongString()) |
| return |
| } |
| p := s.Prog(loadByType(v.Type)) |
| ssagen.AddrAuto(&p.From, v.Args[0]) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| case ssa.OpStoreReg: |
| if v.Type.IsFlags() { |
| v.Fatalf("store flags not implemented: %v", v.LongString()) |
| return |
| } |
| p := s.Prog(storeByType(v.Type)) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[0].Reg() |
| ssagen.AddrAuto(&p.To, v) |
| case ssa.OpS390XLoweredGetClosurePtr: |
| // Closure pointer is R12 (already) |
| ssagen.CheckLoweredGetClosurePtr(v) |
| case ssa.OpS390XLoweredRound32F, ssa.OpS390XLoweredRound64F: |
| // input is already rounded |
| case ssa.OpS390XLoweredGetG: |
| r := v.Reg() |
| p := s.Prog(s390x.AMOVD) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = s390x.REGG |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = r |
| case ssa.OpS390XLoweredGetCallerSP: |
| // caller's SP is FixedFrameSize below the address of the first arg |
| p := s.Prog(s390x.AMOVD) |
| p.From.Type = obj.TYPE_ADDR |
| p.From.Offset = -base.Ctxt.FixedFrameSize() |
| p.From.Name = obj.NAME_PARAM |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| case ssa.OpS390XLoweredGetCallerPC: |
| p := s.Prog(obj.AGETCALLERPC) |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| case ssa.OpS390XCALLstatic, ssa.OpS390XCALLclosure, ssa.OpS390XCALLinter: |
| s.Call(v) |
| case ssa.OpS390XLoweredWB: |
| 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.OpS390XLoweredPanicBoundsA, ssa.OpS390XLoweredPanicBoundsB, ssa.OpS390XLoweredPanicBoundsC: |
| 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.OpS390XFLOGR, ssa.OpS390XPOPCNT, |
| ssa.OpS390XNEG, ssa.OpS390XNEGW, |
| ssa.OpS390XMOVWBR, ssa.OpS390XMOVDBR: |
| 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.OpS390XNOT, ssa.OpS390XNOTW: |
| v.Fatalf("NOT/NOTW generated %s", v.LongString()) |
| case ssa.OpS390XSumBytes2, ssa.OpS390XSumBytes4, ssa.OpS390XSumBytes8: |
| v.Fatalf("SumBytes generated %s", v.LongString()) |
| case ssa.OpS390XLOCGR: |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = int64(v.Aux.(s390x.CCMask)) |
| p.Reg = v.Args[1].Reg() |
| p.To.Type = obj.TYPE_REG |
| p.To.Reg = v.Reg() |
| case ssa.OpS390XFSQRTS, ssa.OpS390XFSQRT: |
| 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.OpS390XLTDBR, ssa.OpS390XLTEBR: |
| opregreg(s, v.Op.Asm(), v.Args[0].Reg(), v.Args[0].Reg()) |
| case ssa.OpS390XInvertFlags: |
| v.Fatalf("InvertFlags should never make it to codegen %v", v.LongString()) |
| case ssa.OpS390XFlagEQ, ssa.OpS390XFlagLT, ssa.OpS390XFlagGT, ssa.OpS390XFlagOV: |
| v.Fatalf("Flag* ops should never make it to codegen %v", v.LongString()) |
| case ssa.OpS390XAddTupleFirst32, ssa.OpS390XAddTupleFirst64: |
| v.Fatalf("AddTupleFirst* should never make it to codegen %v", v.LongString()) |
| case ssa.OpS390XLoweredNilCheck: |
| // Issue a load which will fault if the input is nil. |
| p := s.Prog(s390x.AMOVBZ) |
| 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 = s390x.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.OpS390XMVC: |
| vo := v.AuxValAndOff() |
| p := s.Prog(s390x.AMVC) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = vo.Val64() |
| p.SetFrom3(obj.Addr{ |
| Type: obj.TYPE_MEM, |
| Reg: v.Args[1].Reg(), |
| Offset: vo.Off64(), |
| }) |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| p.To.Offset = vo.Off64() |
| case ssa.OpS390XSTMG2, ssa.OpS390XSTMG3, ssa.OpS390XSTMG4, |
| ssa.OpS390XSTM2, ssa.OpS390XSTM3, ssa.OpS390XSTM4: |
| for i := 2; i < len(v.Args)-1; i++ { |
| if v.Args[i].Reg() != v.Args[i-1].Reg()+1 { |
| v.Fatalf("invalid store multiple %s", v.LongString()) |
| } |
| } |
| p := s.Prog(v.Op.Asm()) |
| p.From.Type = obj.TYPE_REG |
| p.From.Reg = v.Args[1].Reg() |
| p.Reg = v.Args[len(v.Args)-2].Reg() |
| p.To.Type = obj.TYPE_MEM |
| p.To.Reg = v.Args[0].Reg() |
| ssagen.AddAux(&p.To, v) |
| case ssa.OpS390XLoweredMove: |
| // Inputs must be valid pointers to memory, |
| // so adjust arg0 and arg1 as part of the expansion. |
| // arg2 should be src+size, |
| // |
| // mvc: MVC $256, 0(R2), 0(R1) |
| // MOVD $256(R1), R1 |
| // MOVD $256(R2), R2 |
| // CMP R2, Rarg2 |
| // BNE mvc |
| // MVC $rem, 0(R2), 0(R1) // if rem > 0 |
| // arg2 is the last address to move in the loop + 256 |
| mvc := s.Prog(s390x.AMVC) |
| mvc.From.Type = obj.TYPE_CONST |
| mvc.From.Offset = 256 |
| mvc.SetFrom3(obj.Addr{Type: obj.TYPE_MEM, Reg: v.Args[1].Reg()}) |
| mvc.To.Type = obj.TYPE_MEM |
| mvc.To.Reg = v.Args[0].Reg() |
| |
| for i := 0; i < 2; i++ { |
| movd := s.Prog(s390x.AMOVD) |
| movd.From.Type = obj.TYPE_ADDR |
| movd.From.Reg = v.Args[i].Reg() |
| movd.From.Offset = 256 |
| movd.To.Type = obj.TYPE_REG |
| movd.To.Reg = v.Args[i].Reg() |
| } |
| |
| cmpu := s.Prog(s390x.ACMPU) |
| cmpu.From.Reg = v.Args[1].Reg() |
| cmpu.From.Type = obj.TYPE_REG |
| cmpu.To.Reg = v.Args[2].Reg() |
| cmpu.To.Type = obj.TYPE_REG |
| |
| bne := s.Prog(s390x.ABLT) |
| bne.To.Type = obj.TYPE_BRANCH |
| bne.To.SetTarget(mvc) |
| |
| if v.AuxInt > 0 { |
| mvc := s.Prog(s390x.AMVC) |
| mvc.From.Type = obj.TYPE_CONST |
| mvc.From.Offset = v.AuxInt |
| mvc.SetFrom3(obj.Addr{Type: obj.TYPE_MEM, Reg: v.Args[1].Reg()}) |
| mvc.To.Type = obj.TYPE_MEM |
| mvc.To.Reg = v.Args[0].Reg() |
| } |
| case ssa.OpS390XLoweredZero: |
| // Input must be valid pointers to memory, |
| // so adjust arg0 as part of the expansion. |
| // arg1 should be src+size, |
| // |
| // clear: CLEAR $256, 0(R1) |
| // MOVD $256(R1), R1 |
| // CMP R1, Rarg1 |
| // BNE clear |
| // CLEAR $rem, 0(R1) // if rem > 0 |
| // arg1 is the last address to zero in the loop + 256 |
| clear := s.Prog(s390x.ACLEAR) |
| clear.From.Type = obj.TYPE_CONST |
| clear.From.Offset = 256 |
| clear.To.Type = obj.TYPE_MEM |
| clear.To.Reg = v.Args[0].Reg() |
| |
| movd := s.Prog(s390x.AMOVD) |
| movd.From.Type = obj.TYPE_ADDR |
| movd.From.Reg = v.Args[0].Reg() |
| movd.From.Offset = 256 |
| movd.To.Type = obj.TYPE_REG |
| movd.To.Reg = v.Args[0].Reg() |
| |
| cmpu := s.Prog(s390x.ACMPU) |
| cmpu.From.Reg = v.Args[0].Reg() |
| cmpu.From.Type = obj.TYPE_REG |
| cmpu.To.Reg = v.Args[1].Reg() |
| cmpu.To.Type = obj.TYPE_REG |
| |
| bne := s.Prog(s390x.ABLT) |
| bne.To.Type = obj.TYPE_BRANCH |
| bne.To.SetTarget(clear) |
| |
| if v.AuxInt > 0 { |
| clear := s.Prog(s390x.ACLEAR) |
| clear.From.Type = obj.TYPE_CONST |
| clear.From.Offset = v.AuxInt |
| clear.To.Type = obj.TYPE_MEM |
| clear.To.Reg = v.Args[0].Reg() |
| } |
| case ssa.OpS390XMOVBZatomicload, ssa.OpS390XMOVWZatomicload, ssa.OpS390XMOVDatomicload: |
| 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.Reg0() |
| case ssa.OpS390XMOVBatomicstore, ssa.OpS390XMOVWatomicstore, ssa.OpS390XMOVDatomicstore: |
| 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.OpS390XLAN, ssa.OpS390XLAO: |
| // LA(N|O) Ry, TMP, 0(Rx) |
| op := s.Prog(v.Op.Asm()) |
| op.From.Type = obj.TYPE_REG |
| op.From.Reg = v.Args[1].Reg() |
| op.Reg = s390x.REGTMP |
| op.To.Type = obj.TYPE_MEM |
| op.To.Reg = v.Args[0].Reg() |
| case ssa.OpS390XLANfloor, ssa.OpS390XLAOfloor: |
| r := v.Args[0].Reg() // clobbered, assumed R1 in comments |
| |
| // Round ptr down to nearest multiple of 4. |
| // ANDW $~3, R1 |
| ptr := s.Prog(s390x.AANDW) |
| ptr.From.Type = obj.TYPE_CONST |
| ptr.From.Offset = 0xfffffffc |
| ptr.To.Type = obj.TYPE_REG |
| ptr.To.Reg = r |
| |
| // Redirect output of LA(N|O) into R1 since it is clobbered anyway. |
| // LA(N|O) Rx, R1, 0(R1) |
| op := s.Prog(v.Op.Asm()) |
| op.From.Type = obj.TYPE_REG |
| op.From.Reg = v.Args[1].Reg() |
| op.Reg = r |
| op.To.Type = obj.TYPE_MEM |
| op.To.Reg = r |
| case ssa.OpS390XLAA, ssa.OpS390XLAAG: |
| p := s.Prog(v.Op.Asm()) |
| p.Reg = v.Reg0() |
| 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.OpS390XLoweredAtomicCas32, ssa.OpS390XLoweredAtomicCas64: |
| // Convert the flags output of CS{,G} into a bool. |
| // CS{,G} arg1, arg2, arg0 |
| // MOVD $0, ret |
| // BNE 2(PC) |
| // MOVD $1, ret |
| // NOP (so the BNE has somewhere to land) |
| |
| // CS{,G} arg1, arg2, arg0 |
| cs := s.Prog(v.Op.Asm()) |
| cs.From.Type = obj.TYPE_REG |
| cs.From.Reg = v.Args[1].Reg() // old |
| cs.Reg = v.Args[2].Reg() // new |
| cs.To.Type = obj.TYPE_MEM |
| cs.To.Reg = v.Args[0].Reg() |
| ssagen.AddAux(&cs.To, v) |
| |
| // MOVD $0, ret |
| movd := s.Prog(s390x.AMOVD) |
| movd.From.Type = obj.TYPE_CONST |
| movd.From.Offset = 0 |
| movd.To.Type = obj.TYPE_REG |
| movd.To.Reg = v.Reg0() |
| |
| // BNE 2(PC) |
| bne := s.Prog(s390x.ABNE) |
| bne.To.Type = obj.TYPE_BRANCH |
| |
| // MOVD $1, ret |
| movd = s.Prog(s390x.AMOVD) |
| movd.From.Type = obj.TYPE_CONST |
| movd.From.Offset = 1 |
| movd.To.Type = obj.TYPE_REG |
| movd.To.Reg = v.Reg0() |
| |
| // NOP (so the BNE has somewhere to land) |
| nop := s.Prog(obj.ANOP) |
| bne.To.SetTarget(nop) |
| case ssa.OpS390XLoweredAtomicExchange32, ssa.OpS390XLoweredAtomicExchange64: |
| // Loop until the CS{,G} succeeds. |
| // MOV{WZ,D} arg0, ret |
| // cs: CS{,G} ret, arg1, arg0 |
| // BNE cs |
| |
| // MOV{WZ,D} arg0, ret |
| load := s.Prog(loadByType(v.Type.FieldType(0))) |
| load.From.Type = obj.TYPE_MEM |
| load.From.Reg = v.Args[0].Reg() |
| load.To.Type = obj.TYPE_REG |
| load.To.Reg = v.Reg0() |
| ssagen.AddAux(&load.From, v) |
| |
| // CS{,G} ret, arg1, arg0 |
| cs := s.Prog(v.Op.Asm()) |
| cs.From.Type = obj.TYPE_REG |
| cs.From.Reg = v.Reg0() // old |
| cs.Reg = v.Args[1].Reg() // new |
| cs.To.Type = obj.TYPE_MEM |
| cs.To.Reg = v.Args[0].Reg() |
| ssagen.AddAux(&cs.To, v) |
| |
| // BNE cs |
| bne := s.Prog(s390x.ABNE) |
| bne.To.Type = obj.TYPE_BRANCH |
| bne.To.SetTarget(cs) |
| case ssa.OpS390XSYNC: |
| s.Prog(s390x.ASYNC) |
| case ssa.OpClobber, ssa.OpClobberReg: |
| // TODO: implement for clobberdead experiment. Nop is ok for now. |
| default: |
| v.Fatalf("genValue not implemented: %s", v.LongString()) |
| } |
| } |
| |
| func blockAsm(b *ssa.Block) obj.As { |
| switch b.Kind { |
| case ssa.BlockS390XBRC: |
| return s390x.ABRC |
| case ssa.BlockS390XCRJ: |
| return s390x.ACRJ |
| case ssa.BlockS390XCGRJ: |
| return s390x.ACGRJ |
| case ssa.BlockS390XCLRJ: |
| return s390x.ACLRJ |
| case ssa.BlockS390XCLGRJ: |
| return s390x.ACLGRJ |
| case ssa.BlockS390XCIJ: |
| return s390x.ACIJ |
| case ssa.BlockS390XCGIJ: |
| return s390x.ACGIJ |
| case ssa.BlockS390XCLIJ: |
| return s390x.ACLIJ |
| case ssa.BlockS390XCLGIJ: |
| return s390x.ACLGIJ |
| } |
| b.Fatalf("blockAsm not implemented: %s", b.LongString()) |
| panic("unreachable") |
| } |
| |
| func ssaGenBlock(s *ssagen.State, b, next *ssa.Block) { |
| // Handle generic blocks first. |
| switch b.Kind { |
| case ssa.BlockPlain: |
| if b.Succs[0].Block() != next { |
| p := s.Prog(s390x.ABR) |
| p.To.Type = obj.TYPE_BRANCH |
| s.Branches = append(s.Branches, ssagen.Branch{P: p, B: b.Succs[0].Block()}) |
| } |
| return |
| case ssa.BlockDefer: |
| // defer returns in R3: |
| // 0 if we should continue executing |
| // 1 if we should jump to deferreturn call |
| p := s.Br(s390x.ACIJ, b.Succs[1].Block()) |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = int64(s390x.NotEqual & s390x.NotUnordered) // unordered is not possible |
| p.Reg = s390x.REG_R3 |
| p.SetFrom3Const(0) |
| if b.Succs[0].Block() != next { |
| s.Br(s390x.ABR, b.Succs[0].Block()) |
| } |
| return |
| case ssa.BlockExit: |
| return |
| case ssa.BlockRet: |
| s.Prog(obj.ARET) |
| return |
| case ssa.BlockRetJmp: |
| p := s.Prog(s390x.ABR) |
| p.To.Type = obj.TYPE_MEM |
| p.To.Name = obj.NAME_EXTERN |
| p.To.Sym = b.Aux.(*obj.LSym) |
| return |
| } |
| |
| // Handle s390x-specific blocks. These blocks all have a |
| // condition code mask in the Aux value and 2 successors. |
| succs := [...]*ssa.Block{b.Succs[0].Block(), b.Succs[1].Block()} |
| mask := b.Aux.(s390x.CCMask) |
| |
| // TODO: take into account Likely property for forward/backward |
| // branches. We currently can't do this because we don't know |
| // whether a block has already been emitted. In general forward |
| // branches are assumed 'not taken' and backward branches are |
| // assumed 'taken'. |
| if next == succs[0] { |
| succs[0], succs[1] = succs[1], succs[0] |
| mask = mask.Inverse() |
| } |
| |
| p := s.Br(blockAsm(b), succs[0]) |
| switch b.Kind { |
| case ssa.BlockS390XBRC: |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = int64(mask) |
| case ssa.BlockS390XCGRJ, ssa.BlockS390XCRJ, |
| ssa.BlockS390XCLGRJ, ssa.BlockS390XCLRJ: |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = int64(mask & s390x.NotUnordered) // unordered is not possible |
| p.Reg = b.Controls[0].Reg() |
| p.SetFrom3Reg(b.Controls[1].Reg()) |
| case ssa.BlockS390XCGIJ, ssa.BlockS390XCIJ: |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = int64(mask & s390x.NotUnordered) // unordered is not possible |
| p.Reg = b.Controls[0].Reg() |
| p.SetFrom3Const(int64(int8(b.AuxInt))) |
| case ssa.BlockS390XCLGIJ, ssa.BlockS390XCLIJ: |
| p.From.Type = obj.TYPE_CONST |
| p.From.Offset = int64(mask & s390x.NotUnordered) // unordered is not possible |
| p.Reg = b.Controls[0].Reg() |
| p.SetFrom3Const(int64(uint8(b.AuxInt))) |
| default: |
| b.Fatalf("branch not implemented: %s", b.LongString()) |
| } |
| if next != succs[1] { |
| s.Br(s390x.ABR, succs[1]) |
| } |
| } |
