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path: root/vendor/github.com/chenzhuoyu/iasm/x86_64/operands.go
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Diffstat (limited to 'vendor/github.com/chenzhuoyu/iasm/x86_64/operands.go')
-rw-r--r--vendor/github.com/chenzhuoyu/iasm/x86_64/operands.go510
1 files changed, 510 insertions, 0 deletions
diff --git a/vendor/github.com/chenzhuoyu/iasm/x86_64/operands.go b/vendor/github.com/chenzhuoyu/iasm/x86_64/operands.go
new file mode 100644
index 000000000..966090225
--- /dev/null
+++ b/vendor/github.com/chenzhuoyu/iasm/x86_64/operands.go
@@ -0,0 +1,510 @@
+package x86_64
+
+import (
+ `errors`
+ `fmt`
+ `math`
+ `reflect`
+ `strconv`
+ `strings`
+ `sync/atomic`
+)
+
+// RelativeOffset represents an RIP-relative offset.
+type RelativeOffset int32
+
+// String implements the fmt.Stringer interface.
+func (self RelativeOffset) String() string {
+ if self == 0 {
+ return "(%rip)"
+ } else {
+ return fmt.Sprintf("%d(%%rip)", self)
+ }
+}
+
+// RoundingControl represents a floating-point rounding option.
+type RoundingControl uint8
+
+const (
+ // RN_SAE represents "Round Nearest", which is the default rounding option.
+ RN_SAE RoundingControl = iota
+
+ // RD_SAE represents "Round Down".
+ RD_SAE
+
+ // RU_SAE represents "Round Up".
+ RU_SAE
+
+ // RZ_SAE represents "Round towards Zero".
+ RZ_SAE
+)
+
+var _RC_NAMES = map[RoundingControl]string {
+ RN_SAE: "rn-sae",
+ RD_SAE: "rd-sae",
+ RU_SAE: "ru-sae",
+ RZ_SAE: "rz-sae",
+}
+
+func (self RoundingControl) String() string {
+ if v, ok := _RC_NAMES[self]; ok {
+ return v
+ } else {
+ panic("invalid RoundingControl value")
+ }
+}
+
+// ExceptionControl represents the "Suppress All Exceptions" flag.
+type ExceptionControl uint8
+
+const (
+ // SAE represents the flag "Suppress All Exceptions" for floating point operations.
+ SAE ExceptionControl = iota
+)
+
+func (ExceptionControl) String() string {
+ return "sae"
+}
+
+// AddressType indicates which kind of value that an Addressable object contains.
+type AddressType uint
+
+const (
+ // None indicates the Addressable does not contain any addressable value.
+ None AddressType = iota
+
+ // Memory indicates the Addressable contains a memory address.
+ Memory
+
+ // Offset indicates the Addressable contains an RIP-relative offset.
+ Offset
+
+ // Reference indicates the Addressable contains a label reference.
+ Reference
+)
+
+// Disposable is a type of object that can be Free'd manually.
+type Disposable interface {
+ Free()
+}
+
+// Label represents a location within the program.
+type Label struct {
+ refs int64
+ Name string
+ Dest *Instruction
+}
+
+func (self *Label) offset(p uintptr, n int) RelativeOffset {
+ if self.Dest == nil {
+ panic("unresolved label: " + self.Name)
+ } else {
+ return RelativeOffset(self.Dest.pc - p - uintptr(n))
+ }
+}
+
+// Free decreases the reference count of a Label, if the
+// refcount drops to 0, the Label will be recycled.
+func (self *Label) Free() {
+ if atomic.AddInt64(&self.refs, -1) == 0 {
+ freeLabel(self)
+ }
+}
+
+// String implements the fmt.Stringer interface.
+func (self *Label) String() string {
+ if self.Dest == nil {
+ return fmt.Sprintf("%s(%%rip)", self.Name)
+ } else {
+ return fmt.Sprintf("%s(%%rip)@%#x", self.Name, self.Dest.pc)
+ }
+}
+
+// Retain increases the reference count of a Label.
+func (self *Label) Retain() *Label {
+ atomic.AddInt64(&self.refs, 1)
+ return self
+}
+
+// Evaluate implements the interface expr.Term.
+func (self *Label) Evaluate() (int64, error) {
+ if self.Dest != nil {
+ return int64(self.Dest.pc), nil
+ } else {
+ return 0, errors.New("unresolved label: " + self.Name)
+ }
+}
+
+// Addressable is a union to represent an addressable operand.
+type Addressable struct {
+ Type AddressType
+ Memory MemoryAddress
+ Offset RelativeOffset
+ Reference *Label
+}
+
+// String implements the fmt.Stringer interface.
+func (self *Addressable) String() string {
+ switch self.Type {
+ case None : return "(not addressable)"
+ case Memory : return self.Memory.String()
+ case Offset : return self.Offset.String()
+ case Reference : return self.Reference.String()
+ default : return "(invalid addressable)"
+ }
+}
+
+// MemoryOperand represents a memory operand for an instruction.
+type MemoryOperand struct {
+ refs int64
+ Size int
+ Addr Addressable
+ Mask RegisterMask
+ Masked bool
+ Broadcast uint8
+}
+
+const (
+ _Sizes = 0b10000000100010111 // bit-mask for valid sizes (0, 1, 2, 4, 8, 16)
+)
+
+func (self *MemoryOperand) isVMX(evex bool) bool {
+ return self.Addr.Type == Memory && self.Addr.Memory.isVMX(evex)
+}
+
+func (self *MemoryOperand) isVMY(evex bool) bool {
+ return self.Addr.Type == Memory && self.Addr.Memory.isVMY(evex)
+}
+
+func (self *MemoryOperand) isVMZ() bool {
+ return self.Addr.Type == Memory && self.Addr.Memory.isVMZ()
+}
+
+func (self *MemoryOperand) isMem() bool {
+ if (_Sizes & (1 << self.Broadcast)) == 0 {
+ return false
+ } else if self.Addr.Type == Memory {
+ return self.Addr.Memory.isMem()
+ } else if self.Addr.Type == Offset {
+ return true
+ } else if self.Addr.Type == Reference {
+ return true
+ } else {
+ return false
+ }
+}
+
+func (self *MemoryOperand) isSize(n int) bool {
+ return self.Size == 0 || self.Size == n
+}
+
+func (self *MemoryOperand) isBroadcast(n int, b uint8) bool {
+ return self.Size == n && self.Broadcast == b
+}
+
+func (self *MemoryOperand) formatMask() string {
+ if !self.Masked {
+ return ""
+ } else {
+ return self.Mask.String()
+ }
+}
+
+func (self *MemoryOperand) formatBroadcast() string {
+ if self.Broadcast == 0 {
+ return ""
+ } else {
+ return fmt.Sprintf("{1to%d}", self.Broadcast)
+ }
+}
+
+func (self *MemoryOperand) ensureAddrValid() {
+ switch self.Addr.Type {
+ case None : break
+ case Memory : self.Addr.Memory.EnsureValid()
+ case Offset : break
+ case Reference : break
+ default : panic("invalid address type")
+ }
+}
+
+func (self *MemoryOperand) ensureSizeValid() {
+ if (_Sizes & (1 << self.Size)) == 0 {
+ panic("invalid memory operand size")
+ }
+}
+
+func (self *MemoryOperand) ensureBroadcastValid() {
+ if (_Sizes & (1 << self.Broadcast)) == 0 {
+ panic("invalid memory operand broadcast")
+ }
+}
+
+// Free decreases the reference count of a MemoryOperand, if the
+// refcount drops to 0, the Label will be recycled.
+func (self *MemoryOperand) Free() {
+ if atomic.AddInt64(&self.refs, -1) == 0 {
+ freeMemoryOperand(self)
+ }
+}
+
+// String implements the fmt.Stringer interface.
+func (self *MemoryOperand) String() string {
+ return self.Addr.String() + self.formatMask() + self.formatBroadcast()
+}
+
+// Retain increases the reference count of a MemoryOperand.
+func (self *MemoryOperand) Retain() *MemoryOperand {
+ atomic.AddInt64(&self.refs, 1)
+ return self
+}
+
+// EnsureValid checks if the memory operand is valid, if not, it panics.
+func (self *MemoryOperand) EnsureValid() {
+ self.ensureAddrValid()
+ self.ensureSizeValid()
+ self.ensureBroadcastValid()
+}
+
+// MemoryAddress represents a memory address.
+type MemoryAddress struct {
+ Base Register
+ Index Register
+ Scale uint8
+ Displacement int32
+}
+
+const (
+ _Scales = 0b100010111 // bit-mask for valid scales (0, 1, 2, 4, 8)
+)
+
+func (self *MemoryAddress) isVMX(evex bool) bool {
+ return self.isMemBase() && (self.Index == nil || isXMM(self.Index) || (evex && isEVEXXMM(self.Index)))
+}
+
+func (self *MemoryAddress) isVMY(evex bool) bool {
+ return self.isMemBase() && (self.Index == nil || isYMM(self.Index) || (evex && isEVEXYMM(self.Index)))
+}
+
+func (self *MemoryAddress) isVMZ() bool {
+ return self.isMemBase() && (self.Index == nil || isZMM(self.Index))
+}
+
+func (self *MemoryAddress) isMem() bool {
+ return self.isMemBase() && (self.Index == nil || isReg64(self.Index))
+}
+
+func (self *MemoryAddress) isMemBase() bool {
+ return (self.Base == nil || isReg64(self.Base)) && // `Base` must be 64-bit if present
+ (self.Scale == 0) == (self.Index == nil) && // `Scale` and `Index` depends on each other
+ (_Scales & (1 << self.Scale)) != 0 // `Scale` can only be 0, 1, 2, 4 or 8
+}
+
+// String implements the fmt.Stringer interface.
+func (self *MemoryAddress) String() string {
+ var dp int
+ var sb strings.Builder
+
+ /* the displacement part */
+ if dp = int(self.Displacement); dp != 0 {
+ sb.WriteString(strconv.Itoa(dp))
+ }
+
+ /* the base register */
+ if sb.WriteByte('('); self.Base != nil {
+ sb.WriteByte('%')
+ sb.WriteString(self.Base.String())
+ }
+
+ /* index is optional */
+ if self.Index != nil {
+ sb.WriteString(",%")
+ sb.WriteString(self.Index.String())
+
+ /* scale is also optional */
+ if self.Scale >= 2 {
+ sb.WriteByte(',')
+ sb.WriteString(strconv.Itoa(int(self.Scale)))
+ }
+ }
+
+ /* close the bracket */
+ sb.WriteByte(')')
+ return sb.String()
+}
+
+// EnsureValid checks if the memory address is valid, if not, it panics.
+func (self *MemoryAddress) EnsureValid() {
+ if !self.isMemBase() || (self.Index != nil && !isIndexable(self.Index)) {
+ panic("not a valid memory address")
+ }
+}
+
+// Ref constructs a memory reference to a label.
+func Ref(ref *Label) (v *MemoryOperand) {
+ v = CreateMemoryOperand()
+ v.Addr.Type = Reference
+ v.Addr.Reference = ref
+ return
+}
+
+// Abs construct a simple memory address that represents absolute addressing.
+func Abs(disp int32) *MemoryOperand {
+ return Sib(nil, nil, 0, disp)
+}
+
+// Ptr constructs a simple memory operand with base and displacement.
+func Ptr(base Register, disp int32) *MemoryOperand {
+ return Sib(base, nil, 0, disp)
+}
+
+// Sib constructs a simple memory operand that represents a complete memory address.
+func Sib(base Register, index Register, scale uint8, disp int32) (v *MemoryOperand) {
+ v = CreateMemoryOperand()
+ v.Addr.Type = Memory
+ v.Addr.Memory.Base = base
+ v.Addr.Memory.Index = index
+ v.Addr.Memory.Scale = scale
+ v.Addr.Memory.Displacement = disp
+ v.EnsureValid()
+ return
+}
+
+/** Operand Matching Helpers **/
+
+const _IntMask =
+ (1 << reflect.Int ) |
+ (1 << reflect.Int8 ) |
+ (1 << reflect.Int16 ) |
+ (1 << reflect.Int32 ) |
+ (1 << reflect.Int64 ) |
+ (1 << reflect.Uint ) |
+ (1 << reflect.Uint8 ) |
+ (1 << reflect.Uint16 ) |
+ (1 << reflect.Uint32 ) |
+ (1 << reflect.Uint64 ) |
+ (1 << reflect.Uintptr)
+
+func isInt(k reflect.Kind) bool {
+ return (_IntMask & (1 << k)) != 0
+}
+
+func asInt64(v interface{}) (int64, bool) {
+ if isSpecial(v) {
+ return 0, false
+ } else if x := efaceOf(v); isInt(x.kind()) {
+ return x.toInt64(), true
+ } else {
+ return 0, false
+ }
+}
+
+func inRange(v interface{}, low int64, high int64) bool {
+ x, ok := asInt64(v)
+ return ok && x >= low && x <= high
+}
+
+func isSpecial(v interface{}) bool {
+ switch v.(type) {
+ case Register8 : return true
+ case Register16 : return true
+ case Register32 : return true
+ case Register64 : return true
+ case KRegister : return true
+ case MMRegister : return true
+ case XMMRegister : return true
+ case YMMRegister : return true
+ case ZMMRegister : return true
+ case RelativeOffset : return true
+ case RoundingControl : return true
+ case ExceptionControl : return true
+ default : return false
+ }
+}
+
+func isIndexable(v interface{}) bool {
+ return isZMM(v) || isReg64(v) || isEVEXXMM(v) || isEVEXYMM(v)
+}
+
+func isImm4 (v interface{}) bool { return inRange(v, 0, 15) }
+func isImm8 (v interface{}) bool { return inRange(v, math.MinInt8, math.MaxUint8) }
+func isImm16 (v interface{}) bool { return inRange(v, math.MinInt16, math.MaxUint16) }
+func isImm32 (v interface{}) bool { return inRange(v, math.MinInt32, math.MaxUint32) }
+func isImm64 (v interface{}) bool { _, r := asInt64(v) ; return r }
+func isConst1 (v interface{}) bool { x, r := asInt64(v) ; return r && x == 1 }
+func isConst3 (v interface{}) bool { x, r := asInt64(v) ; return r && x == 3 }
+func isRel8 (v interface{}) bool { x, r := v.(RelativeOffset) ; return r && x >= math.MinInt8 && x <= math.MaxInt8 }
+func isRel32 (v interface{}) bool { _, r := v.(RelativeOffset) ; return r }
+func isLabel (v interface{}) bool { _, r := v.(*Label) ; return r }
+func isReg8 (v interface{}) bool { _, r := v.(Register8) ; return r }
+func isReg8REX (v interface{}) bool { x, r := v.(Register8) ; return r && (x & 0x80) == 0 && x >= SPL }
+func isReg16 (v interface{}) bool { _, r := v.(Register16) ; return r }
+func isReg32 (v interface{}) bool { _, r := v.(Register32) ; return r }
+func isReg64 (v interface{}) bool { _, r := v.(Register64) ; return r }
+func isMM (v interface{}) bool { _, r := v.(MMRegister) ; return r }
+func isXMM (v interface{}) bool { x, r := v.(XMMRegister) ; return r && x <= XMM15 }
+func isEVEXXMM (v interface{}) bool { _, r := v.(XMMRegister) ; return r }
+func isXMMk (v interface{}) bool { x, r := v.(MaskedRegister) ; return isXMM(v) || (r && isXMM(x.Reg) && !x.Mask.Z) }
+func isXMMkz (v interface{}) bool { x, r := v.(MaskedRegister) ; return isXMM(v) || (r && isXMM(x.Reg)) }
+func isYMM (v interface{}) bool { x, r := v.(YMMRegister) ; return r && x <= YMM15 }
+func isEVEXYMM (v interface{}) bool { _, r := v.(YMMRegister) ; return r }
+func isYMMk (v interface{}) bool { x, r := v.(MaskedRegister) ; return isYMM(v) || (r && isYMM(x.Reg) && !x.Mask.Z) }
+func isYMMkz (v interface{}) bool { x, r := v.(MaskedRegister) ; return isYMM(v) || (r && isYMM(x.Reg)) }
+func isZMM (v interface{}) bool { _, r := v.(ZMMRegister) ; return r }
+func isZMMk (v interface{}) bool { x, r := v.(MaskedRegister) ; return isZMM(v) || (r && isZMM(x.Reg) && !x.Mask.Z) }
+func isZMMkz (v interface{}) bool { x, r := v.(MaskedRegister) ; return isZMM(v) || (r && isZMM(x.Reg)) }
+func isK (v interface{}) bool { _, r := v.(KRegister) ; return r }
+func isKk (v interface{}) bool { x, r := v.(MaskedRegister) ; return isK(v) || (r && isK(x.Reg) && !x.Mask.Z) }
+func isM (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && x.isMem() && x.Broadcast == 0 && !x.Masked }
+func isMk (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && x.isMem() && x.Broadcast == 0 && !(x.Masked && x.Mask.Z) }
+func isMkz (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && x.isMem() && x.Broadcast == 0 }
+func isM8 (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && isM(v) && x.isSize(1) }
+func isM16 (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && isM(v) && x.isSize(2) }
+func isM16kz (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && isMkz(v) && x.isSize(2) }
+func isM32 (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && isM(v) && x.isSize(4) }
+func isM32k (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && isMk(v) && x.isSize(4) }
+func isM32kz (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && isMkz(v) && x.isSize(4) }
+func isM64 (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && isM(v) && x.isSize(8) }
+func isM64k (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && isMk(v) && x.isSize(8) }
+func isM64kz (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && isMkz(v) && x.isSize(8) }
+func isM128 (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && isM(v) && x.isSize(16) }
+func isM128kz (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && isMkz(v) && x.isSize(16) }
+func isM256 (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && isM(v) && x.isSize(32) }
+func isM256kz (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && isMkz(v) && x.isSize(32) }
+func isM512 (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && isM(v) && x.isSize(64) }
+func isM512kz (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && isMkz(v) && x.isSize(64) }
+func isM64M32bcst (v interface{}) bool { x, r := v.(*MemoryOperand) ; return isM64(v) || (r && x.isBroadcast(4, 2)) }
+func isM128M32bcst (v interface{}) bool { x, r := v.(*MemoryOperand) ; return isM128(v) || (r && x.isBroadcast(4, 4)) }
+func isM256M32bcst (v interface{}) bool { x, r := v.(*MemoryOperand) ; return isM256(v) || (r && x.isBroadcast(4, 8)) }
+func isM512M32bcst (v interface{}) bool { x, r := v.(*MemoryOperand) ; return isM512(v) || (r && x.isBroadcast(4, 16)) }
+func isM128M64bcst (v interface{}) bool { x, r := v.(*MemoryOperand) ; return isM128(v) || (r && x.isBroadcast(8, 2)) }
+func isM256M64bcst (v interface{}) bool { x, r := v.(*MemoryOperand) ; return isM256(v) || (r && x.isBroadcast(8, 4)) }
+func isM512M64bcst (v interface{}) bool { x, r := v.(*MemoryOperand) ; return isM512(v) || (r && x.isBroadcast(8, 8)) }
+func isVMX (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && x.isVMX(false) && !x.Masked }
+func isEVEXVMX (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && x.isVMX(true) && !x.Masked }
+func isVMXk (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && x.isVMX(true) }
+func isVMY (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && x.isVMY(false) && !x.Masked }
+func isEVEXVMY (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && x.isVMY(true) && !x.Masked }
+func isVMYk (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && x.isVMY(true) }
+func isVMZ (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && x.isVMZ() && !x.Masked }
+func isVMZk (v interface{}) bool { x, r := v.(*MemoryOperand) ; return r && x.isVMZ() }
+func isSAE (v interface{}) bool { _, r := v.(ExceptionControl) ; return r }
+func isER (v interface{}) bool { _, r := v.(RoundingControl) ; return r }
+
+func isImmExt(v interface{}, ext int, min int64, max int64) bool {
+ if x, ok := asInt64(v); !ok {
+ return false
+ } else if m := int64(1) << (8 * ext); x < m && x >= m + min {
+ return true
+ } else {
+ return x <= max && x >= min
+ }
+}
+
+func isImm8Ext(v interface{}, ext int) bool {
+ return isImmExt(v, ext, math.MinInt8, math.MaxInt8)
+}
+
+func isImm32Ext(v interface{}, ext int) bool {
+ return isImmExt(v, ext, math.MinInt32, math.MaxInt32)
+}
generated by cgit v1.3 (git 2.53.0) at 2026-04-29 05:56:04 +0000