libmwemu 0.25.4

x86 32/64bits and system internals emulator, for securely emulating malware and other stuff.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22

use crate::color;
use crate::emu::Emu;
use iced_x86::Instruction;

// PAVGB: packed 8-bit lane operation.
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),
    );
    let dest = emu.get_operand_xmm_value_128(ins, 0, true).unwrap_or(0);
    let src = emu.get_operand_xmm_value_128(ins, 1, true).unwrap_or(0);
    let mut result = 0u128;
    for i in 0..16 {
        let shift = i * 8;
        let a = ((dest >> shift) & 0xff) as u16;
        let b = ((src >> shift) & 0xff) as u16;
        result |= (((a + b + 1) >> 1) as u128 & 0xff) << shift;
    }
    emu.set_operand_xmm_value_128(ins, 0, result);
    true
}