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/
prog.go
308 lines (281 loc) · 12.9 KB
/
prog.go
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// Copyright 2014 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/internal/obj"
"cmd/internal/obj/ppc64"
)
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 = [ppc64.ALAST & obj.AMask]obj.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.ACHECKNIL: {Flags: gc.LeftRead},
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 Power opcode.
obj.ANOP: {Flags: gc.LeftRead | gc.RightWrite},
// Integer
ppc64.AADD & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.ASUB & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.ANEG & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AAND & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AOR & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AXOR & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AMULLD & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AMULLW & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AMULHD & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AMULHDU & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.ADIVD & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.ADIVDU & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.ASLD & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.ASRD & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.ASRAD & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.ACMP & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RightRead},
ppc64.ACMPU & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RightRead},
ppc64.ATD & obj.AMask: {Flags: gc.SizeQ | gc.RightRead},
// Floating point.
ppc64.AFADD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AFADDS & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AFSUB & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AFSUBS & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AFMUL & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AFMULS & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AFDIV & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AFDIVS & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AFCTIDZ & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AFCFID & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AFCFIDU & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AFCMPU & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightRead},
ppc64.AFRSP & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv},
ppc64.AFSQRT & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite},
// Moves
ppc64.AMOVB & obj.AMask: {Flags: gc.SizeB | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv},
ppc64.AMOVBU & obj.AMask: {Flags: gc.SizeB | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv | gc.PostInc},
ppc64.AMOVBZ & obj.AMask: {Flags: gc.SizeB | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv},
ppc64.AMOVH & obj.AMask: {Flags: gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv},
ppc64.AMOVHU & obj.AMask: {Flags: gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv | gc.PostInc},
ppc64.AMOVHZ & obj.AMask: {Flags: gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv},
ppc64.AMOVW & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv},
// there is no AMOVWU.
ppc64.AMOVWZU & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv | gc.PostInc},
ppc64.AMOVWZ & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv},
ppc64.AMOVD & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Move},
ppc64.AMOVDU & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Move | gc.PostInc},
ppc64.AFMOVS & obj.AMask: {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv},
ppc64.AFMOVD & obj.AMask: {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Move},
// Jumps
ppc64.ABR & obj.AMask: {Flags: gc.Jump | gc.Break},
ppc64.ABL & obj.AMask: {Flags: gc.Call},
ppc64.ABEQ & obj.AMask: {Flags: gc.Cjmp},
ppc64.ABNE & obj.AMask: {Flags: gc.Cjmp},
ppc64.ABGE & obj.AMask: {Flags: gc.Cjmp},
ppc64.ABLT & obj.AMask: {Flags: gc.Cjmp},
ppc64.ABGT & obj.AMask: {Flags: gc.Cjmp},
ppc64.ABLE & obj.AMask: {Flags: gc.Cjmp},
obj.ARET: {Flags: gc.Break},
obj.ADUFFZERO: {Flags: gc.Call},
obj.ADUFFCOPY: {Flags: gc.Call},
}
func initproginfo() {
var addvariant = []int{V_CC, V_V, V_CC | V_V}
// Perform one-time expansion of instructions in progtable to
// their CC, V, and VCC variants
for i := range progtable {
as := obj.As(i)
if progtable[as].Flags == 0 {
continue
}
variant := as2variant(as)
for i := range addvariant {
as2 := variant2as(as, variant|addvariant[i])
if as2 != 0 && progtable[as2&obj.AMask].Flags == 0 {
progtable[as2&obj.AMask] = progtable[as]
}
}
}
}
func proginfo(p *obj.Prog) {
info := &p.Info
*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 /*CanRegRead |*/
}
if (p.From.Type == obj.TYPE_MEM || p.From.Type == obj.TYPE_ADDR) && p.From.Reg != 0 {
info.Regindex |= RtoB(int(p.From.Reg))
if info.Flags&gc.PostInc != 0 {
info.Regset |= RtoB(int(p.From.Reg))
}
}
if (p.To.Type == obj.TYPE_MEM || p.To.Type == obj.TYPE_ADDR) && p.To.Reg != 0 {
info.Regindex |= RtoB(int(p.To.Reg))
if info.Flags&gc.PostInc != 0 {
info.Regset |= RtoB(int(p.To.Reg))
}
}
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 == obj.ADUFFZERO {
info.Reguse |= 1<<0 | RtoB(ppc64.REG_R3)
info.Regset |= RtoB(ppc64.REG_R3)
}
if p.As == obj.ADUFFCOPY {
// TODO(austin) Revisit when duffcopy is implemented
info.Reguse |= RtoB(ppc64.REG_R3) | RtoB(ppc64.REG_R4) | RtoB(ppc64.REG_R5)
info.Regset |= RtoB(ppc64.REG_R3) | RtoB(ppc64.REG_R4)
}
}
// Instruction variants table, populated by initvariants via Main.
// The index is the base form of the instruction, masked by obj.AMask.
// The 4 values are the unmasked base form, then the unmasked CC, V,
// and VCC variants, respectively.
var varianttable = [ppc64.ALAST & obj.AMask][4]obj.As{}
func initvariant(as obj.As, variants ...obj.As) {
vv := &varianttable[as&obj.AMask]
vv[0] = as
for i, v := range variants {
vv[i+1] = v
}
}
func initvariants() {
initvariant(ppc64.AADD, ppc64.AADDCC, ppc64.AADDV, ppc64.AADDVCC)
initvariant(ppc64.AADDC, ppc64.AADDCCC, ppc64.AADDCV, ppc64.AADDCVCC)
initvariant(ppc64.AADDE, ppc64.AADDECC, ppc64.AADDEV, ppc64.AADDEVCC)
initvariant(ppc64.AADDME, ppc64.AADDMECC, ppc64.AADDMEV, ppc64.AADDMEVCC)
initvariant(ppc64.AADDZE, ppc64.AADDZECC, ppc64.AADDZEV, ppc64.AADDZEVCC)
initvariant(ppc64.AAND, ppc64.AANDCC)
initvariant(ppc64.AANDN, ppc64.AANDNCC)
initvariant(ppc64.ACNTLZD, ppc64.ACNTLZDCC)
initvariant(ppc64.ACNTLZW, ppc64.ACNTLZWCC)
initvariant(ppc64.ADIVD, ppc64.ADIVDCC, ppc64.ADIVDV, ppc64.ADIVDVCC)
initvariant(ppc64.ADIVDU, ppc64.ADIVDUCC, ppc64.ADIVDUV, ppc64.ADIVDUVCC)
initvariant(ppc64.ADIVW, ppc64.ADIVWCC, ppc64.ADIVWV, ppc64.ADIVWVCC)
initvariant(ppc64.ADIVWU, ppc64.ADIVWUCC, ppc64.ADIVWUV, ppc64.ADIVWUVCC)
initvariant(ppc64.AEQV, ppc64.AEQVCC)
initvariant(ppc64.AEXTSB, ppc64.AEXTSBCC)
initvariant(ppc64.AEXTSH, ppc64.AEXTSHCC)
initvariant(ppc64.AEXTSW, ppc64.AEXTSWCC)
initvariant(ppc64.AFABS, ppc64.AFABSCC)
initvariant(ppc64.AFADD, ppc64.AFADDCC)
initvariant(ppc64.AFADDS, ppc64.AFADDSCC)
initvariant(ppc64.AFCFID, ppc64.AFCFIDCC)
initvariant(ppc64.AFCFIDU, ppc64.AFCFIDUCC)
initvariant(ppc64.AFCTID, ppc64.AFCTIDCC)
initvariant(ppc64.AFCTIDZ, ppc64.AFCTIDZCC)
initvariant(ppc64.AFCTIW, ppc64.AFCTIWCC)
initvariant(ppc64.AFCTIWZ, ppc64.AFCTIWZCC)
initvariant(ppc64.AFDIV, ppc64.AFDIVCC)
initvariant(ppc64.AFDIVS, ppc64.AFDIVSCC)
initvariant(ppc64.AFMADD, ppc64.AFMADDCC)
initvariant(ppc64.AFMADDS, ppc64.AFMADDSCC)
initvariant(ppc64.AFMOVD, ppc64.AFMOVDCC)
initvariant(ppc64.AFMSUB, ppc64.AFMSUBCC)
initvariant(ppc64.AFMSUBS, ppc64.AFMSUBSCC)
initvariant(ppc64.AFMUL, ppc64.AFMULCC)
initvariant(ppc64.AFMULS, ppc64.AFMULSCC)
initvariant(ppc64.AFNABS, ppc64.AFNABSCC)
initvariant(ppc64.AFNEG, ppc64.AFNEGCC)
initvariant(ppc64.AFNMADD, ppc64.AFNMADDCC)
initvariant(ppc64.AFNMADDS, ppc64.AFNMADDSCC)
initvariant(ppc64.AFNMSUB, ppc64.AFNMSUBCC)
initvariant(ppc64.AFNMSUBS, ppc64.AFNMSUBSCC)
initvariant(ppc64.AFRES, ppc64.AFRESCC)
initvariant(ppc64.AFRSP, ppc64.AFRSPCC)
initvariant(ppc64.AFRSQRTE, ppc64.AFRSQRTECC)
initvariant(ppc64.AFSEL, ppc64.AFSELCC)
initvariant(ppc64.AFSQRT, ppc64.AFSQRTCC)
initvariant(ppc64.AFSQRTS, ppc64.AFSQRTSCC)
initvariant(ppc64.AFSUB, ppc64.AFSUBCC)
initvariant(ppc64.AFSUBS, ppc64.AFSUBSCC)
initvariant(ppc64.AMTFSB0, ppc64.AMTFSB0CC)
initvariant(ppc64.AMTFSB1, ppc64.AMTFSB1CC)
initvariant(ppc64.AMULHD, ppc64.AMULHDCC)
initvariant(ppc64.AMULHDU, ppc64.AMULHDUCC)
initvariant(ppc64.AMULHW, ppc64.AMULHWCC)
initvariant(ppc64.AMULHWU, ppc64.AMULHWUCC)
initvariant(ppc64.AMULLD, ppc64.AMULLDCC, ppc64.AMULLDV, ppc64.AMULLDVCC)
initvariant(ppc64.AMULLW, ppc64.AMULLWCC, ppc64.AMULLWV, ppc64.AMULLWVCC)
initvariant(ppc64.ANAND, ppc64.ANANDCC)
initvariant(ppc64.ANEG, ppc64.ANEGCC, ppc64.ANEGV, ppc64.ANEGVCC)
initvariant(ppc64.ANOR, ppc64.ANORCC)
initvariant(ppc64.AOR, ppc64.AORCC)
initvariant(ppc64.AORN, ppc64.AORNCC)
initvariant(ppc64.AREM, ppc64.AREMCC, ppc64.AREMV, ppc64.AREMVCC)
initvariant(ppc64.AREMD, ppc64.AREMDCC, ppc64.AREMDV, ppc64.AREMDVCC)
initvariant(ppc64.AREMDU, ppc64.AREMDUCC, ppc64.AREMDUV, ppc64.AREMDUVCC)
initvariant(ppc64.AREMU, ppc64.AREMUCC, ppc64.AREMUV, ppc64.AREMUVCC)
initvariant(ppc64.ARLDC, ppc64.ARLDCCC)
initvariant(ppc64.ARLDCL, ppc64.ARLDCLCC)
initvariant(ppc64.ARLDCR, ppc64.ARLDCRCC)
initvariant(ppc64.ARLDMI, ppc64.ARLDMICC)
initvariant(ppc64.ARLWMI, ppc64.ARLWMICC)
initvariant(ppc64.ARLWNM, ppc64.ARLWNMCC)
initvariant(ppc64.ASLD, ppc64.ASLDCC)
initvariant(ppc64.ASLW, ppc64.ASLWCC)
initvariant(ppc64.ASRAD, ppc64.ASRADCC)
initvariant(ppc64.ASRAW, ppc64.ASRAWCC)
initvariant(ppc64.ASRD, ppc64.ASRDCC)
initvariant(ppc64.ASRW, ppc64.ASRWCC)
initvariant(ppc64.ASUB, ppc64.ASUBCC, ppc64.ASUBV, ppc64.ASUBVCC)
initvariant(ppc64.ASUBC, ppc64.ASUBCCC, ppc64.ASUBCV, ppc64.ASUBCVCC)
initvariant(ppc64.ASUBE, ppc64.ASUBECC, ppc64.ASUBEV, ppc64.ASUBEVCC)
initvariant(ppc64.ASUBME, ppc64.ASUBMECC, ppc64.ASUBMEV, ppc64.ASUBMEVCC)
initvariant(ppc64.ASUBZE, ppc64.ASUBZECC, ppc64.ASUBZEV, ppc64.ASUBZEVCC)
initvariant(ppc64.AXOR, ppc64.AXORCC)
for i := range varianttable {
vv := &varianttable[i]
if vv[0] == 0 {
// Instruction has no variants
varianttable[i][0] = obj.As(i)
continue
}
// Copy base form to other variants
if vv[0]&obj.AMask == obj.As(i) {
for _, v := range vv {
if v != 0 {
varianttable[v&obj.AMask] = varianttable[i]
}
}
}
}
}
// as2variant returns the variant (V_*) flags of instruction as.
func as2variant(as obj.As) int {
for i, v := range varianttable[as&obj.AMask] {
if v&obj.AMask == as&obj.AMask {
return i
}
}
gc.Fatalf("as2variant: instruction %v is not a variant of itself", obj.Aconv(as&obj.AMask))
return 0
}
// variant2as returns the instruction as with the given variant (V_*) flags.
// If no such variant exists, this returns 0.
func variant2as(as obj.As, flags int) obj.As {
return varianttable[as&obj.AMask][flags]
}