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ASH etc flags

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This commit is contained in:
folkert van heusden 2023-03-20 14:00:49 +01:00
parent a57d89a045
commit 3761b177af
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
1 changed files with 13 additions and 4 deletions
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17
cpu.cpp
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@ -627,15 +627,23 @@ bool cpu::additional_double_operand_instructions(const uint16_t instr)
if (shift == 0) { if (shift == 0) {
setPSW_c(false); setPSW_c(false);
setPSW_v(SIGN(R, false) != SIGN(oldR, false));
} }
else if (shift < 32) { else if (shift <= 15) {
R <<= shift; R <<= shift;
setPSW_c(R & 0x10000); setPSW_c(R & 0x10000);
setPSW_v((!!SIGN(oldR, false)) != (!!(R >> 15)));
}
else if (shift < 32) {
setPSW_c((R << (shift - 16)) & 1);
R = 0;
setPSW_v(!!oldR);
} }
else if (shift == 32) { else if (shift == 32) {
R = -sign; R = -sign;
setPSW_c(sign); setPSW_c(sign);
setPSW_v(SIGN(R, false) != SIGN(oldR, false));
} }
else { else {
int shift_n = (64 - shift) - 1; int shift_n = (64 - shift) - 1;
@ -643,6 +651,7 @@ bool cpu::additional_double_operand_instructions(const uint16_t instr)
R >>= shift_n; R >>= shift_n;
setPSW_c(R & 1); setPSW_c(R & 1);
setPSW_v(SIGN(R, false) != SIGN(oldR, false));
R >>= 1; R >>= 1;
} }
@ -651,7 +660,6 @@ bool cpu::additional_double_operand_instructions(const uint16_t instr)
setPSW_n(SIGN(R, false)); setPSW_n(SIGN(R, false));
setPSW_z(R == 0); setPSW_z(R == 0);
setPSW_v(SIGN(R, false) != SIGN(oldR, false));
setRegister(reg, R); setRegister(reg, R);
@ -1179,11 +1187,12 @@ bool cpu::single_operand_instructions(const uint16_t instr)
v |= add; v |= add;
setPSW_n(SIGN(v, word_mode)); setPSW_n(SIGN(v, word_mode));
setPSW_z(IS_0(v, word_mode)); setPSW_z(IS_0(v, false));
setPSW_c(SIGN(vl, word_mode)); setPSW_c(SIGN(vl, word_mode));
setPSW_v(getPSW_n() ^ getPSW_c()); setPSW_v(getPSW_n() ^ getPSW_c());
setRegister(dst_reg, false, v); setRegister(dst_reg, false, v);
} }
else { else {
auto a = getGAM(dst_mode, dst_reg, word_mode, false); auto a = getGAM(dst_mode, dst_reg, word_mode, false);
@ -1194,7 +1203,7 @@ bool cpu::single_operand_instructions(const uint16_t instr)
if (set_flags) { if (set_flags) {
setPSW_n(SIGN(v, word_mode)); setPSW_n(SIGN(v, word_mode));
setPSW_z(IS_0(v, word_mode)); setPSW_z(IS_0(v, false));
setPSW_c(SIGN(vl, word_mode)); setPSW_c(SIGN(vl, word_mode));
setPSW_v(getPSW_n() ^ getPSW_c()); setPSW_v(getPSW_n() ^ getPSW_c());
} }