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fix(cpu): use barrel shifter in data processing immediates

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This commit is contained in:
Rekai Nyangadzayi Musuka
2022-01-17 11:02:34 -04:00
parent 2a416fb2c6
commit d05a924420
3 changed files with 31 additions and 15 deletions
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6
src/cpu/arm/single_data_transfer.zig
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@@ -62,9 +62,9 @@ fn registerOffset(cpu: *Arm7tdmi, opcode: u32) u32 {
var dummy = CPSR{ .raw = 0x0000_0000 };
return switch (@truncate(u2, opcode >> 5)) {
0b00 => BarrelShifter.logical_left(&dummy, rm, shift_byte),
0b01 => BarrelShifter.logical_right(&dummy, rm, shift_byte),
0b00 => BarrelShifter.logicalLeft(&dummy, rm, shift_byte),
0b01 => BarrelShifter.logicalRight(&dummy, rm, shift_byte),
0b10 => BarrelShifter.arithmetic_right(&dummy, rm, shift_byte),
0b11 => BarrelShifter.rotate_right(&dummy, rm, shift_byte),
0b11 => BarrelShifter.rotateRight(&dummy, rm, shift_byte),
};
}