vendor/golang.org/x/net/bpf/constants.go

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// Copyright 2016 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 bpf

// A Register is a register of the BPF virtual machine.
type Register uint16

const (
	// RegA is the accumulator register. RegA is always the
	// destination register of ALU operations.
	RegA Register = iota
	// RegX is the indirection register, used by LoadIndirect
	// operations.
	RegX
)

// An ALUOp is an arithmetic or logic operation.
type ALUOp uint16

// ALU binary operation types.
const (
	ALUOpAdd ALUOp = iota << 4
	ALUOpSub
	ALUOpMul
	ALUOpDiv
	ALUOpOr
	ALUOpAnd
	ALUOpShiftLeft
	ALUOpShiftRight
	aluOpNeg // Not exported because it's the only unary ALU operation, and gets its own instruction type.
	ALUOpMod
	ALUOpXor
)

// A JumpTest is a comparison operator used in conditional jumps.
type JumpTest uint16

// Supported operators for conditional jumps.
// K can be RegX for JumpIfX
const (
	// K == A
	JumpEqual JumpTest = iota
	// K != A
	JumpNotEqual
	// K > A
	JumpGreaterThan
	// K < A
	JumpLessThan
	// K >= A
	JumpGreaterOrEqual
	// K <= A
	JumpLessOrEqual
	// K & A != 0
	JumpBitsSet
	// K & A == 0
	JumpBitsNotSet
)