libmwemu 0.25.2

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!("Cyan"), &crate::emu::decoded_instruction::DecodedInstruction::X86(*ins));

    let sz0 = emu.get_operand_sz(ins, 0);
    let sz1 = emu.get_operand_sz(ins, 1);

    if sz0 == 128 && sz1 == 128 {
        let value0 = match emu.get_operand_xmm_value_128(ins, 0, true) {
            Some(v) => v,
            None => {
                log::trace!("error getting xmm value1");
                return false;
            }
        };
        let value1 = match emu.get_operand_xmm_value_128(ins, 1, true) {
            Some(v) => v,
            None => {
                log::trace!("error getting xmm value1");
                return false;
            }
        };

        let mut result = 0u128;
        for i in 0..16 {
            let byte0 = ((value0 >> (8 * i)) & 0xFF) as u8;
            let byte1 = ((value1 >> (8 * i)) & 0xFF) as u8;
            // Per-byte wrapping subtraction; staying in u8 prevents an underflow
            // (e.g. 0x00 - 0xff = 0x01) from bleeding into higher byte lanes.
            let res_byte = byte0.wrapping_sub(byte1) as u128;
            result |= res_byte << (8 * i);
        }

        emu.set_operand_xmm_value_128(ins, 0, result);
    } else {
        unimplemented!();
    }
    true
}