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emu: modrm8 r8 decode had HI/LO registers backwards

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This commit is contained in:
Jared Burce
2021-04-03 01:14:51 -07:00
parent e1c7370aa2
commit 67b5b7a615
1 changed files with 8 additions and 8 deletions
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16
src/emu/i8088.rs
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@@ -271,14 +271,14 @@ macro_rules! step {
(@r8 $cookie:tt, $cpu:expr, $bus:expr, $prefix:tt, ($modrm_val:ident, $modrm:tt, $modrm16:tt, $modrm8:tt)) => {
// TODO: Should these also be passed into the macro like the modrm specs?
match $modrm_val >> 3 & 0x7 {
0 => step!(@arg $cookie, RegHi { reg: &$cpu.a } ),
1 => step!(@arg $cookie, RegHi { reg: &$cpu.c } ),
2 => step!(@arg $cookie, RegHi { reg: &$cpu.d } ),
3 => step!(@arg $cookie, RegHi { reg: &$cpu.b } ),
4 => step!(@arg $cookie, RegLo { reg: &$cpu.a } ),
5 => step!(@arg $cookie, RegLo { reg: &$cpu.c } ),
6 => step!(@arg $cookie, RegLo { reg: &$cpu.d } ),
7 => step!(@arg $cookie, RegLo { reg: &$cpu.b } ),
0 => step!(@arg $cookie, RegLo { reg: &$cpu.a } ),
1 => step!(@arg $cookie, RegLo { reg: &$cpu.c } ),
2 => step!(@arg $cookie, RegLo { reg: &$cpu.d } ),
3 => step!(@arg $cookie, RegLo { reg: &$cpu.b } ),
4 => step!(@arg $cookie, RegHi { reg: &$cpu.a } ),
5 => step!(@arg $cookie, RegHi { reg: &$cpu.c } ),
6 => step!(@arg $cookie, RegHi { reg: &$cpu.d } ),
7 => step!(@arg $cookie, RegHi { reg: &$cpu.b } ),
_ => unreachable!()
};
};