libmwemu 0.25.1

x86 32/64bits and system internals emulator, for securely emulating malware and other stuff.
Documentation 
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use crate::emu::Emu;
use crate::{color, regs64};
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 sz0 = emu.get_operand_sz(ins, 0);
    let sz1 = emu.get_operand_sz(ins, 1);

    // The source low 64 bits: from a vector register (low qword) or an r/m64.
    let value: u64 = if sz1 == 128 || sz1 == 256 {
        emu.get_operand_xmm_value_128(ins, 1, true).unwrap_or(0) as u64
    } else {
        match emu.get_operand_value(ins, 1, true) {
            Some(v) => v,
            None => {
                log::trace!("error reading second operand");
                return false;
            }
        }
    };

    match sz0 {
        // vmovq r/m64, xmm : store the low 64 bits of the vector.
        64 => {
            emu.set_operand_value(ins, 0, value);
        }
        // vmovq xmm, r/m64 | xmm/m64 : write the low qword, zero-extend to 128.
        128 => {
            emu.set_operand_xmm_value_128(ins, 0, value as u128);
        }
        256 => {
            emu.set_operand_ymm_value_256(ins, 0, regs64::U256::from(value));
        }
        _ => unimplemented!(""),
    }
    true
}