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removed variable from add_register

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folkert van heusden 2024-06-24 09:37:25 +02:00
parent a4f753915c
commit e782dc43dd
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
2 changed files with 15 additions and 19 deletions
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32
cpu.cpp
View file

@ -202,17 +202,13 @@ bool cpu::put_result(const gam_rc_t & g, const uint16_t value)
return b->write(g.addr.value(), g.word_mode, value, g.mode_selection, g.space).is_psw == false;
}
uint16_t cpu::addRegister(const int nr, const rm_selection_t mode_selection, const uint16_t value)
uint16_t cpu::add_register(const int nr, const uint16_t value)
{
if (nr < 6)
return regs0_5[get_register_set()][nr] += value;
if (nr == 6) {
if (mode_selection == rm_prev)
return sp[getPSW_prev_runmode()] += value;
if (nr == 6)
return sp[getPSW_runmode()] += value;
}
assert(nr == 7);
@ -494,20 +490,20 @@ gam_rc_t cpu::getGAM(const uint8_t mode, const uint8_t reg, const word_mode_t wo
g.addr = get_register(reg);
if (read_value)
g.value = b->read(g.addr.value(), word_mode, rm_cur, isR7_space);
addRegister(reg, rm_cur, word_mode == wm_word || reg == 7 || reg == 6 ? 2 : 1);
add_register(reg, word_mode == wm_word || reg == 7 || reg == 6 ? 2 : 1);
g.mmr1_update = { word_mode == wm_word || reg == 7 || reg == 6 ? 2 : 1, reg };
break;
case 3: // @(Rn)+ / @#a
g.addr = b->read(get_register(reg), wm_word, rm_cur, isR7_space);
// might be wrong: the adds should happen when the read is really performed, because of traps
addRegister(reg, rm_cur, 2);
add_register(reg, 2);
g.mmr1_update = { 2, reg };
g.space = d_space;
if (read_value)
g.value = b->read(g.addr.value(), word_mode, rm_cur, g.space);
break;
case 4: // -(Rn)
addRegister(reg, rm_cur, word_mode == wm_word || reg == 7 || reg == 6 ? -2 : -1);
add_register(reg, word_mode == wm_word || reg == 7 || reg == 6 ? -2 : -1);
g.mmr1_update = { word_mode == wm_word || reg == 7 || reg == 6 ? -2 : -1, reg };
g.space = d_space;
g.addr = get_register(reg);
@ -515,7 +511,7 @@ gam_rc_t cpu::getGAM(const uint8_t mode, const uint8_t reg, const word_mode_t wo
g.value = b->read(g.addr.value(), word_mode, rm_cur, isR7_space);
break;
case 5: // @-(Rn)
addRegister(reg, rm_cur, -2);
add_register(reg, -2);
g.mmr1_update = { -2, reg };
g.addr = b->read(get_register(reg), wm_word, rm_cur, isR7_space);
g.space = d_space;
@ -524,7 +520,7 @@ gam_rc_t cpu::getGAM(const uint8_t mode, const uint8_t reg, const word_mode_t wo
break;
case 6: // x(Rn) / a
next_word = b->read(getPC(), wm_word, rm_cur, i_space);
addRegister(7, rm_cur, + 2);
add_register(7, + 2);
g.addr = get_register(reg) + next_word;
g.space = d_space;
if (read_value)
@ -532,7 +528,7 @@ gam_rc_t cpu::getGAM(const uint8_t mode, const uint8_t reg, const word_mode_t wo
break;
case 7: // @x(Rn) / @a
next_word = b->read(getPC(), wm_word, rm_cur, i_space);
addRegister(7, rm_cur, + 2);
add_register(7, + 2);
g.addr = b->read(get_register(reg) + next_word, wm_word, rm_cur, d_space);
g.space = d_space;
if (read_value)
@ -961,7 +957,7 @@ bool cpu::additional_double_operand_instructions(const uint16_t instr)
}
case 7: { // SOB
if (addRegister(reg, rm_cur, -1)) {
if (add_register(reg, -1)) {
uint16_t newPC = getPC() - dst * 2;
setPC(newPC);
@ -1603,7 +1599,7 @@ bool cpu::conditional_branch_instructions(const uint16_t instr)
}
if (take)
addRegister(7, rm_cur, offset * 2);
add_register(7, offset * 2);
return true;
}
@ -1655,7 +1651,7 @@ void cpu::pushStack(const uint16_t v)
trap(04, 7);
}
else {
uint16_t a = addRegister(6, rm_cur, -2);
uint16_t a = add_register(6, -2);
b->write_word(a, v, d_space);
}
@ -1666,7 +1662,7 @@ uint16_t cpu::popStack()
uint16_t a = get_register(6);
uint16_t temp = b->read_word(a, d_space);
addRegister(6, rm_cur, 2);
add_register(6, 2);
return temp;
}
@ -1812,7 +1808,7 @@ bool cpu::misc_operations(const uint16_t instr)
// do not overwrite SP when it was just set
if (link_reg != 6)
addRegister(6, rm_cur, 2);
add_register(6, 2);
return true;
}
@ -2416,7 +2412,7 @@ void cpu::step()
uint16_t instr = b->read_word(instruction_start);
addRegister(7, rm_cur, 2);
add_register(7, 2);
if (double_operand_instructions(instr))
return;

2
cpu.h
View file

@ -83,7 +83,7 @@ private:
bool check_pending_interrupts() const; // needs the 'qi_lock'-lock
bool execute_any_pending_interrupt();
uint16_t addRegister(const int nr, const rm_selection_t mode_selection, const uint16_t value);
uint16_t add_register(const int nr, const uint16_t value);
void addToMMR1(const gam_rc_t & g);