Cannot correctly explain the operand access mode of the bts instruction

[LLLZed]

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disinfo.CompleteInstr: bts qword ptr ds:[rcx], 08h disinfo.Instruction.Category: 10005 disinfo.AccessMode: 1

I think the access mode of this instruction should be READ+WRITE

[BeaEngine]

you are right, actually, when operand is READ+WRITE, BeaEngine uses WRITE but it is wrong. Work in progress...

[BeaEngine]

fixed in commit fb42d80

from BeaEnginePython import *
buffer = bytes.fromhex('480fba2908')
instr = Disasm(buffer)
instr.read()
print(instr.json())

output is:

{
    "repr": "bts qword ptr [rcx], 08h",
    "category": "GENERAL_PURPOSE_INSTRUCTION",
    "mnemonic": "bts",
    "bytes": "48 0f ba 29 08",
    "error": 0,
    "arch": 64,
    "operands": {
        "1": {
            "repr": "rcx",
            "type": "memory",
            "size": 64,
            "mode": "read+write",
            "memory": {
                "base": "REG1",
                "index": "",
                "scale": 0,
                "displacement": "0x0"
            }
        },
        "2": {
            "repr": "08h",
            "type": "constant",
            "size": 8,
            "mode": "read"
        }
    },
    "registers": {
        "modified": {
            "type": 32,
            "gpr": "",
            "mmx": "",
            "xmm": "",
            "ymm": "",
            "zmm": "",
            "special": "REG0",
            "cr": "",
            "dr": "",
            "mem_management": "",
            "mpx": "",
            "opmask": "",
            "segment": "",
            "fpu": "",
            "tmm": ""
        },
        "read": {
            "type": 2049,
            "gpr": "REG1",
            "mmx": "",
            "xmm": "",
            "ymm": "",
            "zmm": "",
            "special": "",
            "cr": "",
            "dr": "",
            "mem_management": "",
            "mpx": "",
            "opmask": "",
            "segment": "REG1",
            "fpu": "",
            "tmm": ""
        }
    },
    "rflags": {
        "of": "undef",
        "sf": "undef",
        "zf": "undef",
        "af": "undef",
        "pf": "undef",
        "cf": "modified",
        "tf": null,
        "if": null,
        "df": null,
        "nt": null,
        "rf": null
    },
    "immediat": "0x8"
}

[BeaEngine]

Last release 5.3.0 is now available : https://github.com/BeaEngine/beaengine/releases/tag/v5.3.0