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Folkert van Heusden 2025-04-04 22:23:34 +02:00
parent f06487d051
commit dd546c34d7
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
1 changed files with 8 additions and 8 deletions
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16
cpu.cpp
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@ -831,18 +831,20 @@ bool cpu::additional_double_operand_instructions(const uint16_t instr)
setPSW_c(false);
setPSW_v(false);
}
else if (shift <= 15) {
R <<= shift;
setPSW_c(R & 0x10000);
}
else if (shift < 32) {
setPSW_c((R << (shift - 16)) & 1);
R = 0;
setPSW_v(false);
for(int i=0; i<shift; i++) {
R <<= 1;
if (SIGN(R, wm_word) != sign)
setPSW_v(true);
}
}
else if (shift == 32) {
R = -sign;
setPSW_c(sign);
setPSW_v(SIGN(oldR, wm_word) != SIGN(R, wm_word));
}
else {
int shift_n = 64 - shift;
@ -855,8 +857,6 @@ bool cpu::additional_double_operand_instructions(const uint16_t instr)
}
}
setPSW_v(SIGN(oldR, wm_word) != SIGN(R, wm_word));
R &= 0xffff;
setPSW_n(SIGN(R, wm_word));
@ -917,7 +917,7 @@ bool cpu::additional_double_operand_instructions(const uint16_t instr)
set_register(reg, R0R1 >> 16);
set_register(reg | 1, R0R1 & 65535);
setPSW_n(R0R1 & 0x80000000);
setPSW_n(new_sign);
setPSW_z(R0R1 == 0);
return true;