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emu: factor out utils into own module

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This commit is contained in:
Jared Burce
2021-03-12 02:27:00 -08:00
parent 27bc36f9d2
commit ac7b3b16a1
7 changed files with 45 additions and 37 deletions
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34
src/emu/i8088.rs
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@@ -3,9 +3,10 @@ use std::fmt::{Debug, Formatter};
use super::byteorder::{ByteOrder, LittleEndian};
use emu::operands::{Addr, Reg, RegHi};
use emu::operands::{Addr, Reg, RegHi, RegLo};
use emu::operations as ops;
use emu::pc::Bus;
use emu::util::segoff_to_addr;
#[allow(non_camel_case_types)]
#[derive(Clone, Debug, Default)]
@@ -302,37 +303,6 @@ impl i8088 {
}
}
pub const fn segoff_to_addr(segment: u16, offset: u16) -> usize {
let segaddr = (segment as usize) << 4;
segaddr + offset as usize
}
pub fn read_hi(val: &Cell<u16>) -> u8 {
let mut buf = [0; 2];
LittleEndian::write_u16(&mut buf, val.get());
buf[1] as u8
}
pub fn read_lo(val: &Cell<u16>) -> u8 {
let mut buf = [0; 2];
LittleEndian::write_u16(&mut buf, val.get());
buf[0] as u8
}
pub fn write_hi(reg: &Cell<u16>, val: u8) {
let mut buf = [0; 2];
LittleEndian::write_u16(&mut buf, reg.get());
buf[1] = val;
reg.set(LittleEndian::read_u16(&buf))
}
pub fn write_lo(reg: &Cell<u16>, val: u8) {
let mut buf = [0; 2];
LittleEndian::write_u16(&mut buf, reg.get());
buf[1] = val;
reg.set(LittleEndian::read_u16(&buf));
}
impl From<u16> for Flags {
fn from(flags: u16) -> Self {
Self {