(Rsh64x64 x y)  => (Rsh64x32  x (Or32 <typ.UInt32> (Zeromask (Int64Hi y)) (Int64Lo y)))
(Rsh64Ux64 x y) => (Rsh64Ux32 x (Or32 <typ.UInt32> (Zeromask (Int64Hi y)) (Int64Lo y)))
(Lsh32x64 x y)  => (Lsh32x32  x (Or32 <typ.UInt32> (Zeromask (Int64Hi y)) (Int64Lo y)))
(Rsh32x64 x y)  => (Rsh32x32  x (Or32 <typ.UInt32> (Zeromask (Int64Hi y)) (Int64Lo y)))

	v_0 := v.Args[0]
	b := v.Block
	typ := &b.Func.Config.Types
	// match: (BitLen64 x)
	// result: (Add32 <typ.Int> (BitLen32 <typ.Int> (Int64Hi x)) (BitLen32 <typ.Int> (Or32 <typ.UInt32> (Int64Lo x) (Zeromask (Int64Hi x)))))
	for {
		x := v_0
		v.reset(OpAdd32)
		v.Type = typ.Int
		v0 := b.NewValue0(v.Pos, OpBitLen32, typ.Int)
		v1 := b.NewValue0(v.Pos, OpInt64Hi, typ.UInt32)
		v1.AddArg(x)
		v0.AddArg(v1)

					changed = true
				}
			}
		}
		if !changed {
			break
		}
	}
	if f.pass.debug > 0 {
		fmt.Printf("func %s\n", f.Name)
		for mem, z := range zeroes {
			fmt.Printf("  memory=v%d ptr=%v zeromask=%b\n", mem, z.base, z.mask)
		}
	}
	return zeroes
}

// wbcall emits write barrier runtime call in b, returns memory.
func wbcall(pos src.XPos, b *Block, fn *obj.LSym, sp, mem *Value, args ...*Value) *Value {

(ZeroExt16to32 ...) => (MOVHUreg ...)

(SignExt8to16 ...)  => (MOVBreg ...)
(SignExt8to32 ...)  => (MOVBreg ...)
(SignExt16to32 ...) => (MOVHreg ...)

(Signmask x) => (SRAconst x [31])
(Zeromask x) => (NEG (SGTU x (MOVWconst [0])))
(Slicemask <t> x) => (SRAconst (NEG <t> x) [31])

// float-int conversion
(Cvt32to(32|64)F ...) => (MOVW(F|D) ...)
(Cvt(32|64)Fto32 ...) => (TRUNC(F|D)W ...)

	{name: "Signmask", argLength: 1, typ: "Int32"},  // 0 if arg0 >= 0, -1 if arg0 < 0
	{name: "Zeromask", argLength: 1, typ: "UInt32"}, // 0 if arg0 == 0, 0xffffffff if arg0 != 0
	{name: "Slicemask", argLength: 1},               // 0 if arg0 == 0, -1 if arg0 > 0, undef if arg0<0. Type is native int size.

(ZeroExt16to32 ...) => (MOVHUreg ...)

(SignExt8to16 ...) => (MOVBreg ...)
(SignExt8to32 ...) => (MOVBreg ...)
(SignExt16to32 ...) => (MOVHreg ...)

(Signmask x) => (SRAconst x [31])
(Zeromask x) => (SRAconst (RSBshiftRL <typ.Int32> x x [1]) [31]) // sign bit of uint32(x)>>1 - x
(Slicemask <t> x) => (SRAconst (RSBconst <t> [0] x) [31])

// float <-> int conversion
(Cvt32to32F ...) => (MOVWF ...)

import (
	"path/filepath"
	"syscall"

	"os"
	"time"

	v1 "k8s.io/api/core/v1"
	"k8s.io/klog/v2"
	"k8s.io/kubernetes/pkg/volume/util/types"
)

const (
	rwMask   = os.FileMode(0660)
	roMask   = os.FileMode(0440)
	execMask = os.FileMode(0110)
)

// SetVolumeOwnership modifies the given volume to be owned by
// fsGroup, and sets SetGid so that newly created files are owned by

		v.AddArg3(ptr, v0, mem)
		return true
	}
	return false
}
func rewriteValueMIPS_OpZeromask(v *Value) bool {
	v_0 := v.Args[0]
	b := v.Block
	typ := &b.Func.Config.Types
	// match: (Zeromask x)
	// result: (NEG (SGTU x (MOVWconst [0])))
	for {
		x := v_0
		v.reset(OpMIPSNEG)
		v0 := b.NewValue0(v.Pos, OpMIPSSGTU, typ.Bool)
		v1 := b.NewValue0(v.Pos, OpMIPSMOVWconst, typ.UInt32)

	if err != nil {
		return false
	}
	stat, ok := info.Sys().(*syscall.Stat_t)
	if !ok || stat == nil {
		return false
	}
	unixPerms := rwMask

	if readonly {
		unixPerms = roMask
	}

	unixPerms |= execMask
	filePerm := info.Mode().Perm()
	if (unixPerms&filePerm == unixPerms) && (info.Mode()&os.ModeSetgid != 0) {
		return true
	}
	return false
}

		v.AddArg4(destptr, v0, v1, mem)
		return true
	}
	return false
}
func rewriteValue386_OpZeromask(v *Value) bool {
	v_0 := v.Args[0]
	b := v.Block
	// match: (Zeromask <t> x)
	// result: (XORLconst [-1] (SBBLcarrymask <t> (CMPLconst x [1])))
	for {
		t := v.Type
		x := v_0
		v.reset(Op386XORLconst)
		v.AuxInt = int32ToAuxInt(-1)