folkert/KEK
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

ASL: do not extend sign

Browse source
This commit is contained in:
folkert van heusden 2022-03-31 10:21:27 +02:00
parent 1b155473d2
commit dd437e65db
1 changed files with 1 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
cpu.cpp
View file

@ -1045,14 +1045,13 @@ bool cpu::single_operand_instructions(const uint16_t instr)
uint16_t a = getGAMAddress(dst_mode, dst_reg, word_mode, false);
int32_t vl = b -> read(a, word_mode);
uint16_t v = (vl << 1) & (word_mode ? 0xff : 0xffff);
uint16_t add = word_mode ? v & 0xff00 : 0;
setPSW_n(word_mode ? v & 0x80 : v & 0x8000);
setPSW_z(v == 0);
setPSW_c(word_mode ? vl & 0x80 : vl & 0x8000);
setPSW_v(getPSW_n() ^ getPSW_c());
put_result(a, dst_mode, dst_reg, word_mode, v | add);
put_result(a, dst_mode, dst_reg, word_mode, v);
}
break;
}