Method Decode

pkg/arch/arm64/decoder.go:185–213

Decode 解码一条 ARM64 指令

(raw uint32, offset int)

// Decode 解码一条 ARM64 指令
func (d *Decoder) Decode(raw uint32, offset int) vm.Instruction {
	inst := vm.Instruction{Raw: raw, Op: int(UNKNOWN), Offset: offset, Rd: -1, Rn: -1, Rm: -1}

	// NOP 快速路径
	if raw == 0xD503201F {
		inst.Op = int(NOP)
		return inst
	}

	op0 := (raw >> 25) & 0xF

	var matched bool
	switch {
	case op0>>1 == 0b100:
		matched = matchAndDecode(raw, dpImmPatterns, &inst)
	case op0>>1 == 0b101:
		matched = matchAndDecode(raw, branchPatterns, &inst)
	case op0&0b0101 == 0b0100:
		matched = matchAndDecode(raw, ldstPatterns, &inst)
	case op0&0b0111 == 0b0101, op0 == 0b1101:
		matched = matchAndDecode(raw, dpRegPatterns, &inst)
	}

	if !matched {
		inst.Op = int(UNSUPPORTED)
	}

	return inst
}

// InstName 返回指令名称
func (d *Decoder) InstName(op int) string {