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Diffstat (limited to 'src/cmd/compile/internal/mips/prog.go')
| -rw-r--r-- | src/cmd/compile/internal/mips/prog.go | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/mips/prog.go b/src/cmd/compile/internal/mips/prog.go new file mode 100644 index 0000000000..32805f0777 --- /dev/null +++ b/src/cmd/compile/internal/mips/prog.go @@ -0,0 +1,157 @@ +// 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 mips + +import ( + "cmd/compile/internal/gc" + "cmd/internal/obj" + "cmd/internal/obj/mips" +) + +const ( + LeftRdwr uint32 = gc.LeftRead | gc.LeftWrite + RightRdwr uint32 = gc.RightRead | gc.RightWrite +) + +// This table gives the basic information about instruction +// generated by the compiler and processed in the optimizer. +// See opt.h for bit definitions. +// +// Instructions not generated need not be listed. +// As an exception to that rule, we typically write down all the +// size variants of an operation even if we just use a subset. +// +// The table is formatted for 8-space tabs. +var progtable = [mips.ALAST & obj.AMask]gc.ProgInfo{ + obj.ATYPE: {Flags: gc.Pseudo | gc.Skip}, + obj.ATEXT: {Flags: gc.Pseudo}, + obj.AFUNCDATA: {Flags: gc.Pseudo}, + obj.APCDATA: {Flags: gc.Pseudo}, + obj.AUNDEF: {Flags: gc.Break}, + obj.AUSEFIELD: {Flags: gc.OK}, + obj.AVARDEF: {Flags: gc.Pseudo | gc.RightWrite}, + obj.AVARKILL: {Flags: gc.Pseudo | gc.RightWrite}, + obj.AVARLIVE: {Flags: gc.Pseudo | gc.LeftRead}, + + // NOP is an internal no-op that also stands + // for USED and SET annotations, not the MIPS opcode. + obj.ANOP: {Flags: gc.LeftRead | gc.RightWrite}, + + // Integer + mips.AADD & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, + mips.AADDU & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, + mips.ASUB & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, + mips.ASUBU & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, + mips.AAND & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, + mips.AOR & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, + mips.AXOR & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, + mips.ANOR & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, + mips.AMUL & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead}, + mips.AMULU & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead}, + mips.ADIV & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead}, + mips.ADIVU & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead}, + mips.ASLL & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, + mips.ASRA & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, + mips.ASRL & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, + mips.ASGT & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, + mips.ASGTU & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite}, + + mips.ACLZ & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightRead}, + mips.ACLO & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightRead}, + + // Floating point. + mips.AADDF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite}, + mips.AADDD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite}, + mips.ASUBF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite}, + mips.ASUBD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite}, + mips.AMULF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite}, + mips.AMULD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite}, + mips.ADIVF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite}, + mips.ADIVD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite}, + mips.AABSF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite}, + mips.AABSD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite}, + mips.ANEGF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite}, + mips.ANEGD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite}, + mips.ACMPEQF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead}, + mips.ACMPEQD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead}, + mips.ACMPGTF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead}, + mips.ACMPGTD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead}, + mips.ACMPGEF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead}, + mips.ACMPGED & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead}, + mips.AMOVFD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv}, + mips.AMOVDF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Conv}, + mips.AMOVFW & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv}, + mips.AMOVWF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Conv}, + mips.AMOVDW & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv}, + mips.AMOVWD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv}, + mips.ATRUNCFW & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv}, + mips.ATRUNCDW & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Conv}, + + mips.ASQRTF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite}, + mips.ASQRTD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite}, + + // Moves + mips.AMOVB & obj.AMask: {Flags: gc.SizeB | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, + mips.AMOVBU & obj.AMask: {Flags: gc.SizeB | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, + mips.AMOVH & obj.AMask: {Flags: gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, + mips.AMOVHU & obj.AMask: {Flags: gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, + mips.AMOVW & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, + mips.AMOVF & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, + mips.AMOVD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv}, + + // Conditional moves + mips.ACMOVN & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | RightRdwr}, + mips.ACMOVZ & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | RightRdwr}, + mips.ACMOVT & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | RightRdwr}, + mips.ACMOVF & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | RightRdwr}, + + // Conditional trap + mips.ATEQ & obj.AMask: {Flags: gc.SizeL | gc.RegRead | gc.RightRead}, + mips.ATNE & obj.AMask: {Flags: gc.SizeL | gc.RegRead | gc.RightRead}, + + // Atomic + mips.ASYNC & obj.AMask: {Flags: gc.OK}, + mips.ALL & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite}, + mips.ASC & obj.AMask: {Flags: gc.SizeL | LeftRdwr | gc.RightRead}, + + // Jumps + mips.AJMP & obj.AMask: {Flags: gc.Jump | gc.Break}, + mips.AJAL & obj.AMask: {Flags: gc.Call}, + mips.ABEQ & obj.AMask: {Flags: gc.Cjmp}, + mips.ABNE & obj.AMask: {Flags: gc.Cjmp}, + mips.ABGEZ & obj.AMask: {Flags: gc.Cjmp}, + mips.ABLTZ & obj.AMask: {Flags: gc.Cjmp}, + mips.ABGTZ & obj.AMask: {Flags: gc.Cjmp}, + mips.ABLEZ & obj.AMask: {Flags: gc.Cjmp}, + mips.ABFPF & obj.AMask: {Flags: gc.Cjmp}, + mips.ABFPT & obj.AMask: {Flags: gc.Cjmp}, + mips.ARET & obj.AMask: {Flags: gc.Break}, + obj.ADUFFZERO: {Flags: gc.Call}, + obj.ADUFFCOPY: {Flags: gc.Call}, +} + +func proginfo(p *obj.Prog) gc.ProgInfo { + info := progtable[p.As&obj.AMask] + + if info.Flags == 0 { + gc.Fatalf("proginfo: unknown instruction %v", p) + } + + if (info.Flags&gc.RegRead != 0) && p.Reg == 0 { + info.Flags &^= gc.RegRead + info.Flags |= gc.RightRead + } + + if p.From.Type == obj.TYPE_ADDR && p.From.Sym != nil && (info.Flags&gc.LeftRead != 0) { + info.Flags &^= gc.LeftRead + info.Flags |= gc.LeftAddr + } + + if p.As == mips.AMUL && p.To.Reg != 0 { + info.Flags |= gc.RightWrite + } + + return info +} |