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INCB clean-up & fix

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folkert van heusden 2024-03-28 22:02:31 +01:00
parent 1e91bb9814
commit ef4739b251
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
1 changed files with 3 additions and 6 deletions
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9
cpu.cpp
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@ -886,10 +886,8 @@ bool cpu::single_operand_instructions(const uint16_t instr)
}
case 0b000101010: { // INC/INCB
auto a = getGAM(dst_mode, dst_reg, word_mode, rm_cur);
if (dst_mode == 0) {
uint16_t v = a.value.value();
uint16_t v = getRegister(dst_reg);
uint16_t add = word_mode == wm_byte ? v & 0xff00 : 0;
v = (v + 1) & (word_mode == wm_byte ? 0xff : 0xffff);
@ -902,8 +900,8 @@ bool cpu::single_operand_instructions(const uint16_t instr)
setRegister(dst_reg, v);
}
else {
auto a = getGAM(dst_mode, dst_reg, word_mode, rm_cur);
int32_t vl = (a.value.value() + 1) & (word_mode == wm_byte ? 0xff : 0xffff);
bool set_flags = a.addr.value() != ADDR_PSW;
if (set_flags) {
@ -935,8 +933,7 @@ bool cpu::single_operand_instructions(const uint16_t instr)
}
else {
auto a = getGAM(dst_mode, dst_reg, word_mode, rm_cur);
uint16_t v = a.value.value();
int32_t vl = (v - 1) & (word_mode == wm_byte ? 0xff : 0xffff);
int32_t vl = (a.value.value() - 1) & (word_mode == wm_byte ? 0xff : 0xffff);
bool set_flags = a.addr.value() != ADDR_PSW;