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"), ins);
    assert!(ins.op_count() == 2);
    assert!(emu.get_operand_sz(ins, 0) == 128);
    assert!(emu.get_operand_sz(ins, 1) == 128);

    let value0 = match emu.get_operand_xmm_value_128(ins, 0, true) {
        Some(v) => v,
        None => return false,
    };
    let value1 = match emu.get_operand_xmm_value_128(ins, 1, true) {
        Some(v) => v,
        None => return false,
    };

    let mut result = 0u128;

    for i in 0..8 {
        let shift = i * 16;
        let word0 = (value0 >> shift) & 0xFFFF;
        let word1 = (value1 >> shift) & 0xFFFF;

        let cmp_result = if word0 > word1 {
            0xFFFFu128
        } else {
            0x0000u128
        };

        result |= cmp_result << shift;
    }

    emu.set_operand_xmm_value_128(ins, 0, result);
    true
}
