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cmd/compile/internal/ssa: make ARM's udiv like other calls

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Passes toolstash-check -all.

Change-Id: Id389f8158cf33a3c0fcef373615b5351e7c74b5b
Reviewed-on: https://go-review.googlesource.com/38082
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Matthew Dempsky 2017-03-10 22:09:43 -08:00
parent b59a405656
commit cc71aa9ac4
7 changed files with 48 additions and 41 deletions
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7
src/cmd/compile/internal/arm/ssa.go
View file

@ -167,11 +167,6 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) {
p.From.Type = obj.TYPE_REG
p.From.Reg = v.Args[0].Reg()
gc.AddrAuto(&p.To, v)
case ssa.OpARMUDIVrtcall:
p := gc.Prog(obj.ACALL)
p.To.Type = obj.TYPE_MEM
p.To.Name = obj.NAME_EXTERN
p.To.Sym = obj.Linklookup(gc.Ctxt, "udiv", 0)
case ssa.OpARMADD,
ssa.OpARMADC,
ssa.OpARMSUB,
@ -625,7 +620,7 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) {
p.From.Offset = v.AuxInt
p.To.Type = obj.TYPE_REG
p.To.Reg = v.Reg()
case ssa.OpARMCALLstatic, ssa.OpARMCALLclosure, ssa.OpARMCALLinter:
case ssa.OpARMCALLstatic, ssa.OpARMCALLclosure, ssa.OpARMCALLinter, ssa.OpARMCALLudiv:
s.Call(v)
case ssa.OpARMDUFFZERO:
p := gc.Prog(obj.ADUFFZERO)

2
src/cmd/compile/internal/ssa/config.go
View file

@ -286,7 +286,7 @@ func NewConfig(arch string, fe Frontend, ctxt *obj.Link, optimize bool) *Config
c.noDuffDevice = true // Don't use Duff's device on NaCl
// runtime call clobber R12 on nacl
opcodeTable[OpARMUDIVrtcall].reg.clobbers |= 1 << 12 // R12
opcodeTable[OpARMCALLudiv].reg.clobbers |= 1 << 12 // R12
}
// Assign IDs to preallocated values/blocks.

20
src/cmd/compile/internal/ssa/gen/ARM.rules
View file

@ -35,11 +35,11 @@
(Div32 x y) ->
(SUB (XOR <config.fe.TypeUInt32()> // negate the result if one operand is negative
(Select0 <config.fe.TypeUInt32()> (UDIVrtcall
(Select0 <config.fe.TypeUInt32()> (CALLudiv {config.ctxt.Lookup("udiv", 0)}
(SUB <config.fe.TypeUInt32()> (XOR x <config.fe.TypeUInt32()> (Signmask x)) (Signmask x)) // negate x if negative
(SUB <config.fe.TypeUInt32()> (XOR y <config.fe.TypeUInt32()> (Signmask y)) (Signmask y)))) // negate y if negative
(Signmask (XOR <config.fe.TypeUInt32()> x y))) (Signmask (XOR <config.fe.TypeUInt32()> x y)))
(Div32u x y) -> (Select0 <config.fe.TypeUInt32()> (UDIVrtcall x y))
(Div32u x y) -> (Select0 <config.fe.TypeUInt32()> (CALLudiv {config.ctxt.Lookup("udiv", 0)} x y))
(Div16 x y) -> (Div32 (SignExt16to32 x) (SignExt16to32 y))
(Div16u x y) -> (Div32u (ZeroExt16to32 x) (ZeroExt16to32 y))
(Div8 x y) -> (Div32 (SignExt8to32 x) (SignExt8to32 y))
@ -49,11 +49,11 @@
(Mod32 x y) ->
(SUB (XOR <config.fe.TypeUInt32()> // negate the result if x is negative
(Select1 <config.fe.TypeUInt32()> (UDIVrtcall
(Select1 <config.fe.TypeUInt32()> (CALLudiv {config.ctxt.Lookup("udiv", 0)}
(SUB <config.fe.TypeUInt32()> (XOR <config.fe.TypeUInt32()> x (Signmask x)) (Signmask x)) // negate x if negative
(SUB <config.fe.TypeUInt32()> (XOR <config.fe.TypeUInt32()> y (Signmask y)) (Signmask y)))) // negate y if negative
(Signmask x)) (Signmask x))
(Mod32u x y) -> (Select1 <config.fe.TypeUInt32()> (UDIVrtcall x y))
(Mod32u x y) -> (Select1 <config.fe.TypeUInt32()> (CALLudiv {config.ctxt.Lookup("udiv", 0)} x y))
(Mod16 x y) -> (Mod32 (SignExt16to32 x) (SignExt16to32 y))
(Mod16u x y) -> (Mod32u (ZeroExt16to32 x) (ZeroExt16to32 y))
(Mod8 x y) -> (Mod32 (SignExt8to32 x) (SignExt8to32 y))
@ -593,10 +593,10 @@
(MULA (MOVWconst [c]) x a) && c%9 == 0 && isPowerOfTwo(c/9) && is32Bit(c) -> (ADD (SLLconst <x.Type> [log2(c/9)] (ADDshiftLL <x.Type> x x [3])) a)
// div by constant
(Select0 (UDIVrtcall x (MOVWconst [1]))) -> x
(Select1 (UDIVrtcall _ (MOVWconst [1]))) -> (MOVWconst [0])
(Select0 (UDIVrtcall x (MOVWconst [c]))) && isPowerOfTwo(c) -> (SRLconst [log2(c)] x)
(Select1 (UDIVrtcall x (MOVWconst [c]))) && isPowerOfTwo(c) -> (ANDconst [c-1] x)
(Select0 (CALLudiv x (MOVWconst [1]))) -> x
(Select1 (CALLudiv _ (MOVWconst [1]))) -> (MOVWconst [0])
(Select0 (CALLudiv x (MOVWconst [c]))) && isPowerOfTwo(c) -> (SRLconst [log2(c)] x)
(Select1 (CALLudiv x (MOVWconst [c]))) && isPowerOfTwo(c) -> (ANDconst [c-1] x)
// constant comparisons
(CMPconst (MOVWconst [x]) [y]) && int32(x)==int32(y) -> (FlagEQ)
@ -814,8 +814,8 @@
(SRAconst [c] (MOVWconst [d])) -> (MOVWconst [int64(int32(d)>>uint64(c))])
(MUL (MOVWconst [c]) (MOVWconst [d])) -> (MOVWconst [int64(int32(c*d))])
(MULA (MOVWconst [c]) (MOVWconst [d]) a) -> (ADDconst [int64(int32(c*d))] a)
(Select0 (UDIVrtcall (MOVWconst [c]) (MOVWconst [d]))) -> (MOVWconst [int64(uint32(c)/uint32(d))])
(Select1 (UDIVrtcall (MOVWconst [c]) (MOVWconst [d]))) -> (MOVWconst [int64(uint32(c)%uint32(d))])
(Select0 (CALLudiv (MOVWconst [c]) (MOVWconst [d]))) -> (MOVWconst [int64(uint32(c)/uint32(d))])
(Select1 (CALLudiv (MOVWconst [c]) (MOVWconst [d]))) -> (MOVWconst [int64(uint32(c)%uint32(d))])
(ANDconst [c] (MOVWconst [d])) -> (MOVWconst [c&d])
(ANDconst [c] (ANDconst [d] x)) -> (ANDconst [c&d] x)
(ORconst [c] (MOVWconst [d])) -> (MOVWconst [c|d])

5
src/cmd/compile/internal/ssa/gen/ARMOps.go
View file

@ -143,7 +143,7 @@ func init() {
// output0 = arg0/arg1, output1 = arg0%arg1
// see ../../../../../runtime/vlop_arm.s
{
name: "UDIVrtcall",
name: "CALLudiv",
argLength: 2,
reg: regInfo{
inputs: []regMask{buildReg("R1"), buildReg("R0")},
@ -152,6 +152,9 @@ func init() {
},
clobberFlags: true,
typ: "(UInt32,UInt32)",
aux: "SymOff",
// TODO(mdempsky): Should this be true?
call: false,
},
{name: "ADDS", argLength: 2, reg: gp21carry, asm: "ADD", commutative: true}, // arg0 + arg1, set carry flag

5
src/cmd/compile/internal/ssa/opGen.go
View file

@ -660,7 +660,7 @@ const (
OpARMMUL
OpARMHMUL
OpARMHMULU
OpARMUDIVrtcall
OpARMCALLudiv
OpARMADDS
OpARMADDSconst
OpARMADC
@ -7784,7 +7784,8 @@ var opcodeTable = [...]opInfo{
},
},
{
name: "UDIVrtcall",
name: "CALLudiv",
auxType: auxSymOff,
argLen: 2,
clobberFlags: true,
reg: regInfo{

44
src/cmd/compile/internal/ssa/rewriteARM.go
View file

@ -13427,14 +13427,15 @@ func rewriteValueARM_OpDiv32(v *Value, config *Config) bool {
_ = b
// match: (Div32 x y)
// cond:
// result: (SUB (XOR <config.fe.TypeUInt32()> (Select0 <config.fe.TypeUInt32()> (UDIVrtcall (SUB <config.fe.TypeUInt32()> (XOR x <config.fe.TypeUInt32()> (Signmask x)) (Signmask x)) (SUB <config.fe.TypeUInt32()> (XOR y <config.fe.TypeUInt32()> (Signmask y)) (Signmask y)))) (Signmask (XOR <config.fe.TypeUInt32()> x y))) (Signmask (XOR <config.fe.TypeUInt32()> x y)))
// result: (SUB (XOR <config.fe.TypeUInt32()> (Select0 <config.fe.TypeUInt32()> (CALLudiv {config.ctxt.Lookup("udiv", 0)} (SUB <config.fe.TypeUInt32()> (XOR x <config.fe.TypeUInt32()> (Signmask x)) (Signmask x)) (SUB <config.fe.TypeUInt32()> (XOR y <config.fe.TypeUInt32()> (Signmask y)) (Signmask y)))) (Signmask (XOR <config.fe.TypeUInt32()> x y))) (Signmask (XOR <config.fe.TypeUInt32()> x y)))
for {
x := v.Args[0]
y := v.Args[1]
v.reset(OpARMSUB)
v0 := b.NewValue0(v.Pos, OpARMXOR, config.fe.TypeUInt32())
v1 := b.NewValue0(v.Pos, OpSelect0, config.fe.TypeUInt32())
v2 := b.NewValue0(v.Pos, OpARMUDIVrtcall, MakeTuple(config.fe.TypeUInt32(), config.fe.TypeUInt32()))
v2 := b.NewValue0(v.Pos, OpARMCALLudiv, MakeTuple(config.fe.TypeUInt32(), config.fe.TypeUInt32()))
v2.Aux = config.ctxt.Lookup("udiv", 0)
v3 := b.NewValue0(v.Pos, OpARMSUB, config.fe.TypeUInt32())
v4 := b.NewValue0(v.Pos, OpARMXOR, config.fe.TypeUInt32())
v4.AddArg(x)
@ -13495,13 +13496,14 @@ func rewriteValueARM_OpDiv32u(v *Value, config *Config) bool {
_ = b
// match: (Div32u x y)
// cond:
// result: (Select0 <config.fe.TypeUInt32()> (UDIVrtcall x y))
// result: (Select0 <config.fe.TypeUInt32()> (CALLudiv {config.ctxt.Lookup("udiv", 0)} x y))
for {
x := v.Args[0]
y := v.Args[1]
v.reset(OpSelect0)
v.Type = config.fe.TypeUInt32()
v0 := b.NewValue0(v.Pos, OpARMUDIVrtcall, MakeTuple(config.fe.TypeUInt32(), config.fe.TypeUInt32()))
v0 := b.NewValue0(v.Pos, OpARMCALLudiv, MakeTuple(config.fe.TypeUInt32(), config.fe.TypeUInt32()))
v0.Aux = config.ctxt.Lookup("udiv", 0)
v0.AddArg(x)
v0.AddArg(y)
v.AddArg(v0)
@ -14885,14 +14887,15 @@ func rewriteValueARM_OpMod32(v *Value, config *Config) bool {
_ = b
// match: (Mod32 x y)
// cond:
// result: (SUB (XOR <config.fe.TypeUInt32()> (Select1 <config.fe.TypeUInt32()> (UDIVrtcall (SUB <config.fe.TypeUInt32()> (XOR <config.fe.TypeUInt32()> x (Signmask x)) (Signmask x)) (SUB <config.fe.TypeUInt32()> (XOR <config.fe.TypeUInt32()> y (Signmask y)) (Signmask y)))) (Signmask x)) (Signmask x))
// result: (SUB (XOR <config.fe.TypeUInt32()> (Select1 <config.fe.TypeUInt32()> (CALLudiv {config.ctxt.Lookup("udiv", 0)} (SUB <config.fe.TypeUInt32()> (XOR <config.fe.TypeUInt32()> x (Signmask x)) (Signmask x)) (SUB <config.fe.TypeUInt32()> (XOR <config.fe.TypeUInt32()> y (Signmask y)) (Signmask y)))) (Signmask x)) (Signmask x))
for {
x := v.Args[0]
y := v.Args[1]
v.reset(OpARMSUB)
v0 := b.NewValue0(v.Pos, OpARMXOR, config.fe.TypeUInt32())
v1 := b.NewValue0(v.Pos, OpSelect1, config.fe.TypeUInt32())
v2 := b.NewValue0(v.Pos, OpARMUDIVrtcall, MakeTuple(config.fe.TypeUInt32(), config.fe.TypeUInt32()))
v2 := b.NewValue0(v.Pos, OpARMCALLudiv, MakeTuple(config.fe.TypeUInt32(), config.fe.TypeUInt32()))
v2.Aux = config.ctxt.Lookup("udiv", 0)
v3 := b.NewValue0(v.Pos, OpARMSUB, config.fe.TypeUInt32())
v4 := b.NewValue0(v.Pos, OpARMXOR, config.fe.TypeUInt32())
v4.AddArg(x)
@ -14932,13 +14935,14 @@ func rewriteValueARM_OpMod32u(v *Value, config *Config) bool {
_ = b
// match: (Mod32u x y)
// cond:
// result: (Select1 <config.fe.TypeUInt32()> (UDIVrtcall x y))
// result: (Select1 <config.fe.TypeUInt32()> (CALLudiv {config.ctxt.Lookup("udiv", 0)} x y))
for {
x := v.Args[0]
y := v.Args[1]
v.reset(OpSelect1)
v.Type = config.fe.TypeUInt32()
v0 := b.NewValue0(v.Pos, OpARMUDIVrtcall, MakeTuple(config.fe.TypeUInt32(), config.fe.TypeUInt32()))
v0 := b.NewValue0(v.Pos, OpARMCALLudiv, MakeTuple(config.fe.TypeUInt32(), config.fe.TypeUInt32()))
v0.Aux = config.ctxt.Lookup("udiv", 0)
v0.AddArg(x)
v0.AddArg(y)
v.AddArg(v0)
@ -16331,12 +16335,12 @@ func rewriteValueARM_OpRsh8x8(v *Value, config *Config) bool {
func rewriteValueARM_OpSelect0(v *Value, config *Config) bool {
b := v.Block
_ = b
// match: (Select0 (UDIVrtcall x (MOVWconst [1])))
// match: (Select0 (CALLudiv x (MOVWconst [1])))
// cond:
// result: x
for {
v_0 := v.Args[0]
if v_0.Op != OpARMUDIVrtcall {
if v_0.Op != OpARMCALLudiv {
break
}
x := v_0.Args[0]
@ -16352,12 +16356,12 @@ func rewriteValueARM_OpSelect0(v *Value, config *Config) bool {
v.AddArg(x)
return true
}
// match: (Select0 (UDIVrtcall x (MOVWconst [c])))
// match: (Select0 (CALLudiv x (MOVWconst [c])))
// cond: isPowerOfTwo(c)
// result: (SRLconst [log2(c)] x)
for {
v_0 := v.Args[0]
if v_0.Op != OpARMUDIVrtcall {
if v_0.Op != OpARMCALLudiv {
break
}
x := v_0.Args[0]
@ -16374,12 +16378,12 @@ func rewriteValueARM_OpSelect0(v *Value, config *Config) bool {
v.AddArg(x)
return true
}
// match: (Select0 (UDIVrtcall (MOVWconst [c]) (MOVWconst [d])))
// match: (Select0 (CALLudiv (MOVWconst [c]) (MOVWconst [d])))
// cond:
// result: (MOVWconst [int64(uint32(c)/uint32(d))])
for {
v_0 := v.Args[0]
if v_0.Op != OpARMUDIVrtcall {
if v_0.Op != OpARMCALLudiv {
break
}
v_0_0 := v_0.Args[0]
@ -16401,12 +16405,12 @@ func rewriteValueARM_OpSelect0(v *Value, config *Config) bool {
func rewriteValueARM_OpSelect1(v *Value, config *Config) bool {
b := v.Block
_ = b
// match: (Select1 (UDIVrtcall _ (MOVWconst [1])))
// match: (Select1 (CALLudiv _ (MOVWconst [1])))
// cond:
// result: (MOVWconst [0])
for {
v_0 := v.Args[0]
if v_0.Op != OpARMUDIVrtcall {
if v_0.Op != OpARMCALLudiv {
break
}
v_0_1 := v_0.Args[1]
@ -16420,12 +16424,12 @@ func rewriteValueARM_OpSelect1(v *Value, config *Config) bool {
v.AuxInt = 0
return true
}
// match: (Select1 (UDIVrtcall x (MOVWconst [c])))
// match: (Select1 (CALLudiv x (MOVWconst [c])))
// cond: isPowerOfTwo(c)
// result: (ANDconst [c-1] x)
for {
v_0 := v.Args[0]
if v_0.Op != OpARMUDIVrtcall {
if v_0.Op != OpARMCALLudiv {
break
}
x := v_0.Args[0]
@ -16442,12 +16446,12 @@ func rewriteValueARM_OpSelect1(v *Value, config *Config) bool {
v.AddArg(x)
return true
}
// match: (Select1 (UDIVrtcall (MOVWconst [c]) (MOVWconst [d])))
// match: (Select1 (CALLudiv (MOVWconst [c]) (MOVWconst [d])))
// cond:
// result: (MOVWconst [int64(uint32(c)%uint32(d))])
for {
v_0 := v.Args[0]
if v_0.Op != OpARMUDIVrtcall {
if v_0.Op != OpARMCALLudiv {
break
}
v_0_0 := v_0.Args[0]

6
src/cmd/internal/obj/sym.go
View file

@ -66,7 +66,7 @@ func Linknew(arch *LinkArch) *Link {
return ctxt
}
func Linklookup(ctxt *Link, name string, v int) *LSym {
func (ctxt *Link) Lookup(name string, v int) *LSym {
s := ctxt.Hash[SymVer{name, v}]
if s != nil {
return s
@ -82,6 +82,10 @@ func Linklookup(ctxt *Link, name string, v int) *LSym {
return s
}
func Linklookup(ctxt *Link, name string, v int) *LSym {
return ctxt.Lookup(name, v)
}
func Linksymfmt(s *LSym) string {
if s == nil {
return "<nil>"