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micro opt for div

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folkert van heusden 2022-03-23 17:52:59 +01:00
parent 80fe44ce85
commit 42fe341091
1 changed files with 3 additions and 1 deletions
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4
cpu.cpp
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@ -501,10 +501,12 @@ bool cpu::additional_double_operand_instructions(const uint16_t instr)
int32_t quot = R0R1 / divider;
uint16_t rem = R0R1 % divider;
// TODO: handle results out of range
setRegister(reg, quot);
setRegister(reg + 1, rem);
setPSW_n(R0R1 / divider < 0);
setPSW_n(quot < 0);
setPSW_z(quot == 0);
setPSW_v(quot > 0xffff || quot < -0xffff);
setPSW_c(false);