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setPSW_flags_nzv

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This commit is contained in:
folkert van heusden 2023-03-18 12:50:14 +01:00
parent 7245340c20
commit 57c7a23bd5
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
2 changed files with 25 additions and 45 deletions
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69
cpu.cpp
View file

@ -260,6 +260,13 @@ void cpu::setPSW(const uint16_t v, const bool limited)
} }
} }
void cpu::setPSW_flags_nzv(const uint16_t value, const bool word_mode)
{
setPSW_n(SIGN(value, word_mode));
setPSW_z(IS_0(value, word_mode));
setPSW_v(false);
}
bool cpu::check_queued_interrupts() bool cpu::check_queued_interrupts()
{ {
std::unique_lock<std::mutex> lck(qi_lock); std::unique_lock<std::mutex> lck(qi_lock);
@ -496,11 +503,8 @@ bool cpu::double_operand_instructions(const uint16_t instr)
addToMMR1(dst_mode, dst_reg, word_mode); addToMMR1(dst_mode, dst_reg, word_mode);
if (set_flags) { if (set_flags)
setPSW_n(SIGN(src_value, word_mode)); setPSW_flags_nzv(src_value, word_mode);
setPSW_z(IS_0(src_value, word_mode));
setPSW_v(false);
}
return true; return true;
} }
@ -526,9 +530,7 @@ bool cpu::double_operand_instructions(const uint16_t instr)
uint16_t dst_value = getGAM(dst_mode, dst_reg, word_mode, false); uint16_t dst_value = getGAM(dst_mode, dst_reg, word_mode, false);
uint16_t result = (dst_value & src_value) & (word_mode ? 0xff : 0xffff); uint16_t result = (dst_value & src_value) & (word_mode ? 0xff : 0xffff);
setPSW_n(SIGN(result, word_mode)); setPSW_flags_nzv(result, word_mode);
setPSW_z(IS_0(result, word_mode));
setPSW_v(false);
return true; return true;
} }
@ -538,11 +540,8 @@ bool cpu::double_operand_instructions(const uint16_t instr)
uint16_t result = b->read(a, word_mode, false) & ~src_value; uint16_t result = b->read(a, word_mode, false) & ~src_value;
if (put_result(a, dst_mode, dst_reg, word_mode, result)) { if (put_result(a, dst_mode, dst_reg, word_mode, result))
setPSW_n(SIGN(result, word_mode)); setPSW_flags_nzv(result, word_mode);
setPSW_z(IS_0(result, word_mode));
setPSW_v(false);
}
return true; return true;
} }
@ -552,11 +551,8 @@ bool cpu::double_operand_instructions(const uint16_t instr)
uint16_t result = b->read(a, word_mode, false) | src_value; uint16_t result = b->read(a, word_mode, false) | src_value;
if (put_result(a, dst_mode, dst_reg, word_mode, result)) { if (put_result(a, dst_mode, dst_reg, word_mode, result))
setPSW_n(SIGN(result, word_mode)); setPSW_flags_nzv(result, word_mode);
setPSW_z(IS_0(result, word_mode));
setPSW_v(false);
}
return true; return true;
} }
@ -777,11 +773,8 @@ bool cpu::additional_double_operand_instructions(const uint16_t instr)
set_flags = a != ADDR_PSW; set_flags = a != ADDR_PSW;
} }
if (set_flags) { if (set_flags)
setPSW_n(vl & 0x8000); setPSW_flags_nzv(vl, false);
setPSW_z(vl == 0);
setPSW_v(false);
}
return true; return true;
} }
@ -837,9 +830,7 @@ bool cpu::single_operand_instructions(const uint16_t instr)
} }
if (set_flags) { if (set_flags) {
setPSW_n(v & 0x80); setPSW_flags_nzv(v, true);
setPSW_z((v & 0xff) == 0);
setPSW_v(false);
setPSW_c(false); setPSW_c(false);
} }
} }
@ -884,9 +875,7 @@ bool cpu::single_operand_instructions(const uint16_t instr)
else else
v ^= 0xffff; v ^= 0xffff;
setPSW_n(SIGN(v, word_mode)); setPSW_flags_nzv(v, word_mode);
setPSW_z(IS_0(v, word_mode));
setPSW_v(false);
setPSW_c(true); setPSW_c(true);
setRegister(dst_reg, false, v); setRegister(dst_reg, false, v);
@ -903,9 +892,7 @@ bool cpu::single_operand_instructions(const uint16_t instr)
bool set_flags = a != ADDR_PSW; bool set_flags = a != ADDR_PSW;
if (set_flags) { if (set_flags) {
setPSW_n(SIGN(v, word_mode)); setPSW_flags_nzv(v, word_mode);
setPSW_z(IS_0(v, word_mode));
setPSW_v(false);
setPSW_c(true); setPSW_c(true);
} }
@ -1100,9 +1087,7 @@ bool cpu::single_operand_instructions(const uint16_t instr)
case 0b000101111: { // TST/TSTB case 0b000101111: { // TST/TSTB
uint16_t v = getGAM(dst_mode, dst_reg, word_mode, false); uint16_t v = getGAM(dst_mode, dst_reg, word_mode, false);
setPSW_n(SIGN(v, word_mode)); setPSW_flags_nzv(v, word_mode);
setPSW_z(IS_0(v, word_mode));
setPSW_v(false);
setPSW_c(false); setPSW_c(false);
break; break;
@ -1331,11 +1316,8 @@ bool cpu::single_operand_instructions(const uint16_t instr)
} }
} }
if (set_flags) { if (set_flags)
setPSW_z(v == 0); setPSW_flags_nzv(v, false);
setPSW_n(SIGN(v, false));
setPSW_v(false);
}
// put on current stack // put on current stack
pushStack(v); pushStack(v);
@ -1384,11 +1366,8 @@ bool cpu::single_operand_instructions(const uint16_t instr)
} }
} }
if (set_flags) { if (set_flags)
setPSW_z(v == 0); setPSW_flags_nzv(v, false);
setPSW_n(SIGN(v, false));
setPSW_v(false);
}
break; break;
} }

1
cpu.h
View file

@ -114,6 +114,7 @@ public:
void setPSW_n(const bool v); void setPSW_n(const bool v);
void setPSW_spl(const int v); void setPSW_spl(const int v);
void setBitPSW(const int bit, const bool v); void setBitPSW(const int bit, const bool v);
void setPSW_flags_nzv(const uint16_t value, const bool word_mode);
uint16_t getPSW() const { return psw; } uint16_t getPSW() const { return psw; }
void setPSW(const uint16_t v, const bool limited); void setPSW(const uint16_t v, const bool limited);