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Load and store instruction clean-up

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dingusdev 2021-01-25 21:03:17 -07:00
parent 5961552ed9
commit 7f0acaf3d3
2 changed files with 91 additions and 116 deletions
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1
cpu/ppc/ppcemu.h
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@ -154,7 +154,6 @@ extern uint32_t uiadd_result;
extern uint32_t uimult_result;
extern int32_t word_copy_location;
extern uint32_t strwrd_replace_value;
extern uint32_t crf_d;
extern uint32_t crf_s;

206
cpu/ppc/ppcopcodes.cpp
View File

@ -56,8 +56,6 @@ uint32_t ppc_result_b = 0;
uint32_t ppc_result_c = 0;
uint32_t ppc_result_d = 0;
uint32_t strwrd_replace_value;
/**
Extract the registers desired and the values of the registers
This also takes the MSR into account, mainly to determine
@ -1373,13 +1371,13 @@ void dppc_interpreter::ppc_dcbz() {
void dppc_interpreter::ppc_stb() {
ppc_grab_regssa();
ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
ppc_effective_address += (reg_a > 0) ? ppc_result_a : 0;
ppc_effective_address += reg_a ? ppc_result_a : 0;
mem_write_byte(ppc_effective_address, ppc_result_d);
}
void dppc_interpreter::ppc_stbx() {
ppc_grab_regssab();
ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
ppc_effective_address = reg_a ? (ppc_result_a + ppc_result_b) : ppc_result_b;
mem_write_byte(ppc_effective_address, ppc_result_d);
}
@ -1438,7 +1436,7 @@ void dppc_interpreter::ppc_sthux() {
void dppc_interpreter::ppc_sthx() {
ppc_grab_regssab();
ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
ppc_effective_address = reg_a ? (ppc_result_a + ppc_result_b) : ppc_result_b;
mem_write_word(ppc_effective_address, ppc_result_d);
}
@ -1451,13 +1449,13 @@ void dppc_interpreter::ppc_sthbrx() {
void dppc_interpreter::ppc_stw() {
ppc_grab_regssa();
ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
ppc_effective_address += (reg_a > 0) ? ppc_result_a : 0;
ppc_effective_address += reg_a ? ppc_result_a : 0;
mem_write_dword(ppc_effective_address, ppc_result_d);
}
void dppc_interpreter::ppc_stwx() {
ppc_grab_regssab();
ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
ppc_effective_address = reg_a ? (ppc_result_a + ppc_result_b) : ppc_result_b;
mem_write_dword(ppc_effective_address, ppc_result_d);
}
@ -1503,7 +1501,7 @@ void dppc_interpreter::ppc_stwux() {
void dppc_interpreter::ppc_stwbrx() {
ppc_grab_regssab();
ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
ppc_effective_address = reg_a ? (ppc_result_a + ppc_result_b) : ppc_result_b;
ppc_result_d = BYTESWAP_32(ppc_result_d);
mem_write_dword(ppc_effective_address, ppc_result_d);
}
@ -1548,7 +1546,7 @@ void dppc_interpreter::ppc_lbzu() {
void dppc_interpreter::ppc_lbzx() {
ppc_grab_regsdab();
ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
ppc_effective_address = reg_a ? (ppc_result_a + ppc_result_b) : ppc_result_b;
ppc_result_d = mem_grab_byte(ppc_effective_address);
ppc_store_result_regd();
}
@ -1570,7 +1568,7 @@ void dppc_interpreter::ppc_lbzux() {
void dppc_interpreter::ppc_lhz() {
ppc_grab_regsda();
ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
ppc_effective_address += (reg_a > 0) ? ppc_result_a : 0;
ppc_effective_address += reg_a ? ppc_result_a : 0;
ppc_result_d = mem_grab_word(ppc_effective_address);
ppc_store_result_regd();
}
@ -1591,7 +1589,7 @@ void dppc_interpreter::ppc_lhzu() {
void dppc_interpreter::ppc_lhzx() {
ppc_grab_regsdab();
ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
ppc_effective_address = reg_a ? (ppc_result_a + ppc_result_b) : ppc_result_b;
ppc_result_d = mem_grab_word(ppc_effective_address);
ppc_store_result_regd();
}
@ -1643,7 +1641,7 @@ void dppc_interpreter::ppc_lhau() {
void dppc_interpreter::ppc_lhaux() {
ppc_grab_regsdab();
ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
ppc_effective_address = reg_a ? (ppc_result_a + ppc_result_b) : ppc_result_b;
uint16_t val = mem_grab_word(ppc_effective_address);
if (val & 0x8000) {
ppc_result_d = 0xFFFF0000UL | (uint32_t)val;
@ -1657,7 +1655,7 @@ void dppc_interpreter::ppc_lhaux() {
void dppc_interpreter::ppc_lhax() {
ppc_grab_regsdab();
ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
ppc_effective_address = reg_a ? (ppc_result_a + ppc_result_b) : ppc_result_b;
uint16_t val = mem_grab_word(ppc_effective_address);
if (val & 0x8000) {
ppc_result_d = 0xFFFF0000UL | (uint32_t)val;
@ -1669,7 +1667,7 @@ void dppc_interpreter::ppc_lhax() {
void dppc_interpreter::ppc_lhbrx() {
ppc_grab_regsdab();
ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
ppc_effective_address = reg_a ? (ppc_result_a + ppc_result_b) : ppc_result_b;
ppc_result_d = (uint32_t)(BYTESWAP_16(mem_grab_word(ppc_effective_address)));
ppc_store_result_regd();
}
@ -1684,7 +1682,7 @@ void dppc_interpreter::ppc_lwz() {
void dppc_interpreter::ppc_lwbrx() {
ppc_grab_regsdab();
ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
ppc_effective_address = reg_a ? (ppc_result_a + ppc_result_b) : ppc_result_b;
ppc_result_d = BYTESWAP_32(mem_grab_dword(ppc_effective_address));
ppc_store_result_regd();
}
@ -1705,7 +1703,7 @@ void dppc_interpreter::ppc_lwzu() {
void dppc_interpreter::ppc_lwzx() {
ppc_grab_regsdab();
ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
ppc_effective_address = reg_a ? (ppc_result_a + ppc_result_b) : ppc_result_b;
ppc_result_d = mem_grab_dword(ppc_effective_address);
ppc_store_result_regd();
}
@ -1746,49 +1744,43 @@ void dppc_interpreter::ppc_lmw() {
void dppc_interpreter::ppc_lswi() {
ppc_grab_regsda();
ppc_effective_address = ppc_result_a;
grab_inb = (ppc_cur_instruction >> 11) & 31;
grab_inb = (grab_inb & 32) == 0 ? 32 : grab_inb;
uint32_t shift_times = 0;
ppc_effective_address = reg_a ? ppc_result_a : 0;
grab_inb = (ppc_cur_instruction >> 11) & 31;
grab_inb = grab_inb ? grab_inb : 32;
uint32_t stringed_word = 0;
while (grab_inb > 0) {
switch (shift_times) {
case 0:
ppc_state.gpr[reg_d] = (ppc_result_d & 0x00FFFFFFUL) |
(mem_grab_byte(ppc_effective_address) << 24);
ppc_store_result_regd();
break;
switch (grab_inb) {
case 1:
ppc_result_d = (ppc_result_d & 0xFF00FFFFUL) |
(mem_grab_byte(ppc_effective_address) << 16);
ppc_store_result_regd();
stringed_word = mem_grab_byte(ppc_effective_address) << 24;
ppc_state.gpr[reg_d] = stringed_word;
grab_inb = 0;
break;
case 2:
ppc_result_d = (ppc_result_d & 0xFFFF00FFUL) |
(mem_grab_byte(ppc_effective_address) << 8);
ppc_store_result_regd();
stringed_word = mem_grab_byte(ppc_effective_address) << 24;
stringed_word += mem_grab_byte(ppc_effective_address + 1) << 16;
ppc_state.gpr[reg_d] = stringed_word;
grab_inb = 0;
break;
case 3:
ppc_result_d = (ppc_result_d & 0xFFFFFF00UL) | mem_grab_byte(ppc_effective_address);
ppc_store_result_regd();
stringed_word = mem_grab_byte(ppc_effective_address) << 24;
stringed_word += mem_grab_byte(ppc_effective_address + 1) << 16;
stringed_word += mem_grab_byte(ppc_effective_address + 2) << 8;
ppc_state.gpr[reg_d] = stringed_word;
grab_inb = 0;
break;
default:
LOG_F(ERROR, "Something really horrible happened with lswi. \n");
ppc_state.gpr[reg_d] = mem_grab_word(ppc_effective_address);
reg_d++;
ppc_effective_address += 4;
grab_inb -= 4;
}
if (shift_times == 3) {
shift_times = 0;
reg_d = (reg_d + 1) & 0x1F;
} else {
shift_times++;
}
ppc_effective_address++;
grab_inb--;
}
}
void dppc_interpreter::ppc_lswx() {
ppc_grab_regsdab();
// Invalid instruction forms
if ((ppc_result_d == 0) && (ppc_result_a == 0)) {
ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP);
@ -1796,116 +1788,100 @@ void dppc_interpreter::ppc_lswx() {
if ((ppc_result_d == ppc_result_a) || (ppc_result_a == ppc_result_b)) {
ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP);
}
ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
grab_inb = ppc_state.spr[SPR::XER] & 127;
uint32_t shift_times = 0;
ppc_effective_address = reg_a ? (ppc_result_a + ppc_result_b) : ppc_result_b;
grab_inb = ppc_state.spr[SPR::XER] & 127;
uint32_t stringed_word = 0;
while (grab_inb > 0) {
switch (shift_times) {
case 0:
ppc_result_d = (ppc_result_d & 0x00FFFFFFUL) |
(mem_grab_byte(ppc_effective_address) << 24);
ppc_store_result_regd();
break;
switch (grab_inb) {
case 1:
ppc_result_d = (ppc_result_d & 0xFF00FFFFUL) |
(mem_grab_byte(ppc_effective_address) << 16);
ppc_store_result_regd();
stringed_word = mem_grab_byte(ppc_effective_address) << 24;
ppc_state.gpr[reg_d] = stringed_word;
grab_inb = 0;
break;
case 2:
ppc_result_d = (ppc_result_d & 0xFFFF00FFUL) |
(mem_grab_byte(ppc_effective_address) << 8);
ppc_store_result_regd();
stringed_word = mem_grab_byte(ppc_effective_address) << 24;
stringed_word += mem_grab_byte(ppc_effective_address + 1) << 16;
ppc_state.gpr[reg_d] = stringed_word;
grab_inb = 0;
break;
case 3:
ppc_result_d = (ppc_result_d & 0xFFFFFF00UL) | mem_grab_byte(ppc_effective_address);
ppc_store_result_regd();
stringed_word = mem_grab_byte(ppc_effective_address) << 24;
stringed_word += mem_grab_byte(ppc_effective_address + 1) << 16;
stringed_word += mem_grab_byte(ppc_effective_address + 2) << 8;
ppc_state.gpr[reg_d] = stringed_word;
grab_inb = 0;
break;
default:
LOG_F(ERROR, "Something really horrible happened with lswx. \n");
ppc_state.gpr[reg_d] = mem_grab_word(ppc_effective_address);
reg_d++;
ppc_effective_address += 4;
grab_inb -= 4;
}
if (shift_times == 3) {
shift_times = 0;
reg_d = (reg_d + 1) & 0x1F;
} else {
shift_times++;
}
ppc_effective_address++;
grab_inb--;
}
}
void dppc_interpreter::ppc_stswi() {
ppc_grab_regssa();
ppc_effective_address = (reg_a == 0) ? 0 : ppc_result_a;
ppc_effective_address = reg_a ? ppc_result_a : 0;
grab_inb = (ppc_cur_instruction >> 11) & 31;
grab_inb = (grab_inb & 32) == 0 ? 32 : grab_inb;
uint32_t shift_times = 0;
grab_inb = (grab_inb & 32) == 0 ? 32 : grab_inb;
while (grab_inb > 0) {
switch (shift_times) {
case 0:
strwrd_replace_value = (ppc_result_d >> 24);
mem_write_byte(ppc_effective_address, strwrd_replace_value);
break;
switch (grab_inb) {
case 1:
strwrd_replace_value = (ppc_result_d >> 16);
mem_write_byte(ppc_effective_address, strwrd_replace_value);
mem_write_byte(ppc_effective_address, (ppc_result_d >> 24));
grab_inb = 0;
break;
case 2:
strwrd_replace_value = (ppc_result_d >> 8);
mem_write_byte(ppc_effective_address, strwrd_replace_value);
mem_write_byte(ppc_effective_address, ((ppc_result_d >> 24) & 0xFF));
mem_write_byte((ppc_effective_address + 1), ((ppc_result_d >> 16) & 0xFF));
grab_inb = 0;
break;
case 3:
strwrd_replace_value = (ppc_result_d);
mem_write_byte(ppc_effective_address, strwrd_replace_value);
mem_write_byte(ppc_effective_address, ((ppc_result_d >> 24) & 0xFF));
mem_write_byte((ppc_effective_address + 1), ((ppc_result_d >> 16) & 0xFF));
mem_write_byte((ppc_effective_address + 2), ((ppc_result_d >> 8) & 0xFF));
grab_inb = 0;
break;
default:
LOG_F(ERROR, "Something really horrible happened with stswi. \n");
mem_write_dword(ppc_effective_address, ppc_result_d);
reg_s++;
ppc_effective_address += 4;
grab_inb -= 4;
}
if (shift_times == 3) {
shift_times = 0;
reg_s = (reg_s + 1) & 0x1F;
} else {
shift_times++;
}
ppc_effective_address++;
grab_inb--;
}
}
void dppc_interpreter::ppc_stswx() {
ppc_grab_regssab();
ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
ppc_effective_address = reg_a ? (ppc_result_a + ppc_result_b) : ppc_result_b;
grab_inb = ppc_state.spr[SPR::XER] & 127;
uint32_t shift_times = 0;
while (grab_inb > 0) {
switch (shift_times) {
case 0:
strwrd_replace_value = (ppc_result_d >> 24);
mem_write_byte(ppc_effective_address, strwrd_replace_value);
break;
switch (grab_inb) {
case 1:
strwrd_replace_value = (ppc_result_d >> 16);
mem_write_byte(ppc_effective_address, strwrd_replace_value);
mem_write_byte(ppc_effective_address, (ppc_result_d >> 24));
grab_inb = 0;
break;
case 2:
strwrd_replace_value = (ppc_result_d >> 8);
mem_write_byte(ppc_effective_address, strwrd_replace_value);
mem_write_byte(ppc_effective_address, ((ppc_result_d >> 24) & 0xFF));
mem_write_byte((ppc_effective_address + 1), ((ppc_result_d >> 16) & 0xFF));
grab_inb = 0;
break;
case 3:
strwrd_replace_value = (ppc_result_d);
mem_write_byte(ppc_effective_address, strwrd_replace_value);
mem_write_byte(ppc_effective_address, ((ppc_result_d >> 24) & 0xFF));
mem_write_byte((ppc_effective_address + 1), ((ppc_result_d >> 16) & 0xFF));
mem_write_byte((ppc_effective_address + 2), ((ppc_result_d >> 8) & 0xFF));
grab_inb = 0;
break;
default:
LOG_F(ERROR, "Something really horrible happened with stswx. \n");
mem_write_dword(ppc_effective_address, ppc_result_d);
reg_s++;
ppc_effective_address += 4;
grab_inb -= 4;
}
if (shift_times == 3) {
shift_times = 0;
reg_s = (reg_s + 1) & 0x1F;
} else {
shift_times++;
}
ppc_effective_address++;
grab_inb--;
}
}