libmwemu 0.24.5

x86 32/64bits and system internals emulator, for securely emulating malware and other stuff.
Documentation 
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use crate::color;
use crate::emu::Emu;
use iced_x86::Instruction;

pub fn execute(emu: &mut Emu, ins: &Instruction, instruction_sz: usize, _rep_step: bool) -> bool {
    emu.show_instruction(color!("Green"), &crate::emu::decoded_instruction::DecodedInstruction::X86(*ins));
    assert!(ins.op_count() == 2);

    let value1 = match emu.get_operand_value(ins, 1, true) {
        Some(v) => v,
        None => return false,
    };

    let value0 = match emu.get_operand_value(ins, 0, true) {
        Some(v) => v,
        None => return false,
    };

    let f_cf = emu.flags().f_cf;
    let res: u64 = match emu.get_operand_sz(ins, 1) {
        64 => emu.flags_mut().add64(value0, value1, f_cf, false),
        32 => emu.flags_mut().add32(
            (value0 & 0xffffffff) as u32,
            (value1 & 0xffffffff) as u32,
            f_cf,
            false,
        ),
        16 => emu.flags_mut().add16(
            (value0 & 0xffff) as u16,
            (value1 & 0xffff) as u16,
            f_cf,
            false,
        ),
        8 => emu
            .flags_mut()
            .add8((value0 & 0xff) as u8, (value1 & 0xff) as u8, f_cf, false),
        _ => unreachable!("weird size"),
    };

    // set the dest to the sum
    if !emu.set_operand_value(ins, 0, res) {
        return false;
    }

    // and then set the src to dest
    // doing in reverse can cause some error for example
    // xadd  [rsp+r9*4+16h],r9
    // which if we assign r9 first then resolve for address make the memory operations fail
    if !emu.set_operand_value(ins, 1, value0) {
        return false;
    }
    true
}