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v-flag for SUB was incorrect sometimes (address 017172 of EQKCE1.BIC)

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folkert van heusden 2023-03-20 15:24:48 +01:00
parent e85e204179
commit da79c357c2
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
1 changed files with 1 additions and 1 deletions
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cpu.cpp
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@ -512,7 +512,7 @@ bool cpu::double_operand_instructions(const uint16_t instr)
result = (g_dst.value.value() - g_ssrc.value.value()) & 0xffff; result = (g_dst.value.value() - g_ssrc.value.value()) & 0xffff;
if (set_flags) { if (set_flags) {
setPSW_v(((g_ssrc.value.value() ^ g_dst.value.value()) & 0x8000) && !((g_dst.value.value() ^ result) & 0x8000)); setPSW_v(SIGN((g_dst.value.value() ^ g_ssrc.value.value()) & (~g_ssrc.value.value() ^ result), false));
setPSW_c(uint16_t(g_dst.value.value()) < uint16_t(g_ssrc.value.value())); setPSW_c(uint16_t(g_dst.value.value()) < uint16_t(g_ssrc.value.value()));
} }
} }