fix inc_lr and dec_lr overflow #454
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jkotlinski
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Aug 6, 2022
| @@ -595,7 +595,7 @@ static void inc_lr(GB_gameboy_t *gb, uint8_t opcode) | |||
| uint8_t value; | |||
| register_id = (opcode >> 4) + 1; | |||
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| value = (gb->registers[register_id] & 0xFF) + 1; | |||
| value = (gb->registers[register_id] + 1) & 0xFF; | |||
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The & 0xff part is redundant, as the value is implicitly casted to uint8_t.
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I think the old version could overflow changing the value of the high register, but worked fine. I'm sorry if this is another instance of C doing some implicit casting I'm not seeing.