mirror of
https://github.com/kubenetworks/kubevpn.git
synced 2025-10-06 07:47:08 +08:00
refactor: update go mod library (#210)
refactor: update go mod library and refactor dev logic Co-authored-by: wencaiwulue <895703375@qq.com>
This commit is contained in:
naison
274
vendor/github.com/ebitengine/purego/struct_arm64.go
generated
vendored
Normal file
274
vendor/github.com/ebitengine/purego/struct_arm64.go
generated
vendored
Normal file
@@ -0,0 +1,274 @@
|
||||
// SPDX-License-Identifier: Apache-2.0
|
||||
// SPDX-FileCopyrightText: 2024 The Ebitengine Authors
|
||||
|
||||
package purego
|
||||
|
||||
import (
|
||||
"math"
|
||||
"reflect"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
func getStruct(outType reflect.Type, syscall syscall15Args) (v reflect.Value) {
|
||||
outSize := outType.Size()
|
||||
switch {
|
||||
case outSize == 0:
|
||||
return reflect.New(outType).Elem()
|
||||
case outSize <= 8:
|
||||
r1 := syscall.a1
|
||||
if isAllSameFloat(outType) {
|
||||
r1 = syscall.f1
|
||||
if outType.NumField() == 2 {
|
||||
r1 = syscall.f2<<32 | syscall.f1
|
||||
}
|
||||
}
|
||||
return reflect.NewAt(outType, unsafe.Pointer(&struct{ a uintptr }{r1})).Elem()
|
||||
case outSize <= 16:
|
||||
r1, r2 := syscall.a1, syscall.a2
|
||||
if isAllSameFloat(outType) {
|
||||
switch outType.NumField() {
|
||||
case 4:
|
||||
r1 = syscall.f2<<32 | syscall.f1
|
||||
r2 = syscall.f4<<32 | syscall.f3
|
||||
case 3:
|
||||
r1 = syscall.f2<<32 | syscall.f1
|
||||
r2 = syscall.f3
|
||||
case 2:
|
||||
r1 = syscall.f1
|
||||
r2 = syscall.f2
|
||||
default:
|
||||
panic("unreachable")
|
||||
}
|
||||
}
|
||||
return reflect.NewAt(outType, unsafe.Pointer(&struct{ a, b uintptr }{r1, r2})).Elem()
|
||||
default:
|
||||
if isAllSameFloat(outType) && outType.NumField() <= 4 {
|
||||
switch outType.NumField() {
|
||||
case 4:
|
||||
return reflect.NewAt(outType, unsafe.Pointer(&struct{ a, b, c, d uintptr }{syscall.f1, syscall.f2, syscall.f3, syscall.f4})).Elem()
|
||||
case 3:
|
||||
return reflect.NewAt(outType, unsafe.Pointer(&struct{ a, b, c uintptr }{syscall.f1, syscall.f2, syscall.f3})).Elem()
|
||||
default:
|
||||
panic("unreachable")
|
||||
}
|
||||
}
|
||||
// create struct from the Go pointer created in arm64_r8
|
||||
// weird pointer dereference to circumvent go vet
|
||||
return reflect.NewAt(outType, *(*unsafe.Pointer)(unsafe.Pointer(&syscall.arm64_r8))).Elem()
|
||||
}
|
||||
}
|
||||
|
||||
// https://github.com/ARM-software/abi-aa/blob/main/sysvabi64/sysvabi64.rst
|
||||
const (
|
||||
_NO_CLASS = 0b00
|
||||
_FLOAT = 0b01
|
||||
_INT = 0b11
|
||||
)
|
||||
|
||||
func addStruct(v reflect.Value, numInts, numFloats, numStack *int, addInt, addFloat, addStack func(uintptr), keepAlive []interface{}) []interface{} {
|
||||
if v.Type().Size() == 0 {
|
||||
return keepAlive
|
||||
}
|
||||
|
||||
if hva, hfa, size := isHVA(v.Type()), isHFA(v.Type()), v.Type().Size(); hva || hfa || size <= 16 {
|
||||
// if this doesn't fit entirely in registers then
|
||||
// each element goes onto the stack
|
||||
if hfa && *numFloats+v.NumField() > numOfFloats {
|
||||
*numFloats = numOfFloats
|
||||
} else if hva && *numInts+v.NumField() > numOfIntegerRegisters() {
|
||||
*numInts = numOfIntegerRegisters()
|
||||
}
|
||||
|
||||
placeRegisters(v, addFloat, addInt)
|
||||
} else {
|
||||
keepAlive = placeStack(v, keepAlive, addInt)
|
||||
}
|
||||
return keepAlive // the struct was allocated so don't panic
|
||||
}
|
||||
|
||||
func placeRegisters(v reflect.Value, addFloat func(uintptr), addInt func(uintptr)) {
|
||||
var val uint64
|
||||
var shift byte
|
||||
var flushed bool
|
||||
class := _NO_CLASS
|
||||
var place func(v reflect.Value)
|
||||
place = func(v reflect.Value) {
|
||||
var numFields int
|
||||
if v.Kind() == reflect.Struct {
|
||||
numFields = v.Type().NumField()
|
||||
} else {
|
||||
numFields = v.Type().Len()
|
||||
}
|
||||
for k := 0; k < numFields; k++ {
|
||||
flushed = false
|
||||
var f reflect.Value
|
||||
if v.Kind() == reflect.Struct {
|
||||
f = v.Field(k)
|
||||
} else {
|
||||
f = v.Index(k)
|
||||
}
|
||||
if shift >= 64 {
|
||||
shift = 0
|
||||
flushed = true
|
||||
if class == _FLOAT {
|
||||
addFloat(uintptr(val))
|
||||
} else {
|
||||
addInt(uintptr(val))
|
||||
}
|
||||
}
|
||||
switch f.Type().Kind() {
|
||||
case reflect.Struct:
|
||||
place(f)
|
||||
case reflect.Bool:
|
||||
if f.Bool() {
|
||||
val |= 1
|
||||
}
|
||||
shift += 8
|
||||
class |= _INT
|
||||
case reflect.Uint8:
|
||||
val |= f.Uint() << shift
|
||||
shift += 8
|
||||
class |= _INT
|
||||
case reflect.Uint16:
|
||||
val |= f.Uint() << shift
|
||||
shift += 16
|
||||
class |= _INT
|
||||
case reflect.Uint32:
|
||||
val |= f.Uint() << shift
|
||||
shift += 32
|
||||
class |= _INT
|
||||
case reflect.Uint64:
|
||||
addInt(uintptr(f.Uint()))
|
||||
shift = 0
|
||||
flushed = true
|
||||
case reflect.Int8:
|
||||
val |= uint64(f.Int()&0xFF) << shift
|
||||
shift += 8
|
||||
class |= _INT
|
||||
case reflect.Int16:
|
||||
val |= uint64(f.Int()&0xFFFF) << shift
|
||||
shift += 16
|
||||
class |= _INT
|
||||
case reflect.Int32:
|
||||
val |= uint64(f.Int()&0xFFFF_FFFF) << shift
|
||||
shift += 32
|
||||
class |= _INT
|
||||
case reflect.Int64:
|
||||
addInt(uintptr(f.Int()))
|
||||
shift = 0
|
||||
flushed = true
|
||||
case reflect.Float32:
|
||||
if class == _FLOAT {
|
||||
addFloat(uintptr(val))
|
||||
val = 0
|
||||
shift = 0
|
||||
}
|
||||
val |= uint64(math.Float32bits(float32(f.Float()))) << shift
|
||||
shift += 32
|
||||
class |= _FLOAT
|
||||
case reflect.Float64:
|
||||
addFloat(uintptr(math.Float64bits(float64(f.Float()))))
|
||||
shift = 0
|
||||
flushed = true
|
||||
case reflect.Array:
|
||||
place(f)
|
||||
default:
|
||||
panic("purego: unsupported kind " + f.Kind().String())
|
||||
}
|
||||
}
|
||||
}
|
||||
place(v)
|
||||
if !flushed {
|
||||
if class == _FLOAT {
|
||||
addFloat(uintptr(val))
|
||||
} else {
|
||||
addInt(uintptr(val))
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func placeStack(v reflect.Value, keepAlive []interface{}, addInt func(uintptr)) []interface{} {
|
||||
// Struct is too big to be placed in registers.
|
||||
// Copy to heap and place the pointer in register
|
||||
ptrStruct := reflect.New(v.Type())
|
||||
ptrStruct.Elem().Set(v)
|
||||
ptr := ptrStruct.Elem().Addr().UnsafePointer()
|
||||
keepAlive = append(keepAlive, ptr)
|
||||
addInt(uintptr(ptr))
|
||||
return keepAlive
|
||||
}
|
||||
|
||||
// isHFA reports a Homogeneous Floating-point Aggregate (HFA) which is a Fundamental Data Type that is a
|
||||
// Floating-Point type and at most four uniquely addressable members (5.9.5.1 in [Arm64 Calling Convention]).
|
||||
// This type of struct will be placed more compactly than the individual fields.
|
||||
//
|
||||
// [Arm64 Calling Convention]: https://github.com/ARM-software/abi-aa/blob/main/sysvabi64/sysvabi64.rst
|
||||
func isHFA(t reflect.Type) bool {
|
||||
// round up struct size to nearest 8 see section B.4
|
||||
structSize := roundUpTo8(t.Size())
|
||||
if structSize == 0 || t.NumField() > 4 {
|
||||
return false
|
||||
}
|
||||
first := t.Field(0)
|
||||
switch first.Type.Kind() {
|
||||
case reflect.Float32, reflect.Float64:
|
||||
firstKind := first.Type.Kind()
|
||||
for i := 0; i < t.NumField(); i++ {
|
||||
if t.Field(i).Type.Kind() != firstKind {
|
||||
return false
|
||||
}
|
||||
}
|
||||
return true
|
||||
case reflect.Array:
|
||||
switch first.Type.Elem().Kind() {
|
||||
case reflect.Float32, reflect.Float64:
|
||||
return true
|
||||
default:
|
||||
return false
|
||||
}
|
||||
case reflect.Struct:
|
||||
for i := 0; i < first.Type.NumField(); i++ {
|
||||
if !isHFA(first.Type) {
|
||||
return false
|
||||
}
|
||||
}
|
||||
return true
|
||||
default:
|
||||
return false
|
||||
}
|
||||
}
|
||||
|
||||
// isHVA reports a Homogeneous Aggregate with a Fundamental Data Type that is a Short-Vector type
|
||||
// and at most four uniquely addressable members (5.9.5.2 in [Arm64 Calling Convention]).
|
||||
// A short vector is a machine type that is composed of repeated instances of one fundamental integral or
|
||||
// floating-point type. It may be 8 or 16 bytes in total size (5.4 in [Arm64 Calling Convention]).
|
||||
// This type of struct will be placed more compactly than the individual fields.
|
||||
//
|
||||
// [Arm64 Calling Convention]: https://github.com/ARM-software/abi-aa/blob/main/sysvabi64/sysvabi64.rst
|
||||
func isHVA(t reflect.Type) bool {
|
||||
// round up struct size to nearest 8 see section B.4
|
||||
structSize := roundUpTo8(t.Size())
|
||||
if structSize == 0 || (structSize != 8 && structSize != 16) {
|
||||
return false
|
||||
}
|
||||
first := t.Field(0)
|
||||
switch first.Type.Kind() {
|
||||
case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Int8, reflect.Int16, reflect.Int32:
|
||||
firstKind := first.Type.Kind()
|
||||
for i := 0; i < t.NumField(); i++ {
|
||||
if t.Field(i).Type.Kind() != firstKind {
|
||||
return false
|
||||
}
|
||||
}
|
||||
return true
|
||||
case reflect.Array:
|
||||
switch first.Type.Elem().Kind() {
|
||||
case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Int8, reflect.Int16, reflect.Int32:
|
||||
return true
|
||||
default:
|
||||
return false
|
||||
}
|
||||
default:
|
||||
return false
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user