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| author | Samuel Perrouault <samuel.perrouault@gmail.com> | 2025-03-26 15:27:51 +0100 |
|---|---|---|
| committer | Samuel Perrouault <samuel.perrouault@gmail.com> | 2025-03-26 15:27:51 +0100 |
| commit | 48032d65b9b9a1df312d632c12909813f04fa135 (patch) | |
| tree | 262b514f61f3c4306fa6092e46fd8ab8d6be2dc9 /src/chip8.rs | |
| parent | d13128082efbc70ef61900b603b22a5967b3c459 (diff) | |
implement SUBN Vx, Vy
Diffstat (limited to 'src/chip8.rs')
| -rw-r--r-- | src/chip8.rs | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/chip8.rs b/src/chip8.rs index eae4a4f..ea3790b 100644 --- a/src/chip8.rs +++ b/src/chip8.rs @@ -140,6 +140,11 @@ impl Chip8 { self.v[0xF] = if self.v[x] & 1 == 1 { 1 } else { 0 }; self.v[x] /= 2; } + 0x0007 => { + eprintln!("SUBN V{}, V{}", x, y); + self.v[0xF] = if self.v[y] > self.v[x] { 1 } else { 0 }; + self.v[x] = self.v[y].wrapping_sub(self.v[x]); + } 0x000E => { eprintln!("SHL V{}", x); self.v[0xF] = if (self.v[x] >> 7) & 1 == 1 { 1 } else { 0 }; |