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Implemeted limited simplified mnemonics for rlwinm

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This commit is contained in:
dingusdev 2020-02-09 20:41:05 -07:00
parent a934ed5bde
commit 30b1116393
2 changed files with 91 additions and 36 deletions
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28
cpu/ppc/ppcdisasm.cpp
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@ -287,6 +287,34 @@ void opc_rlwinm(PPCDisasmContext* ctx)
auto mb = (ctx->instr_code >> 6) & 0x1F;
auto me = (ctx->instr_code >> 1) & 0x1F;
if (ctx->simplified) {
if (mb == 0) {
if (me < 32) {
if (sh == (31 - me)) {
fmt_threeop(ctx->instr_str, "slwi", rs, ra, sh);
return;
}
if (sh == 0) {
fmt_threeop(ctx->instr_str, "clrrwi", rs, ra, mb);
return;
}
}
if (me == 31) {
fmt_threeop(ctx->instr_str, "rotlwi", rs, ra, sh);
return;
}
if (me > 0){
ctx->instr_str = my_sprintf("%-8sr%d, r%d, %d, %d", "extlwi", rs, ra, sh, me);
return;
}
}
}
if (ctx->instr_code & 1)
fmt_rotateop(ctx->instr_str, "rlwinm.", rs, ra, sh, mb, me, true);
else

81
cpu/ppc/ppcopcodes.cpp
View File

@ -136,10 +136,12 @@ void ppc_changecrf0(uint32_t set_result) {
if (set_result == 0) {
ppc_state.ppc_cr |= 0x20000000UL;
} else {
}
else {
if (set_result & 0x80000000) {
ppc_state.ppc_cr |= 0x80000000UL;
} else {
}
else {
ppc_state.ppc_cr |= 0x40000000UL;
}
}
@ -172,7 +174,8 @@ inline void ppc_carry_sub(uint32_t a, uint32_t b) {
inline void ppc_setsoov(uint32_t a, uint32_t b, uint32_t d) {
if ((a ^ b) & (a ^ d) & 0x80000000UL) {
ppc_state.ppc_spr[SPR::XER] |= 0xC0000000UL;
} else {
}
else {
ppc_state.ppc_spr[SPR::XER] &= 0xBFFFFFFFUL;
}
}
@ -878,7 +881,8 @@ void ppc_mullwo() {
int64_t product = (int64_t)(int32_t)ppc_result_a * (int64_t)(int32_t)ppc_result_b;
if (product != (int64_t)(int32_t)product) {
ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
} else {
}
else {
ppc_state.ppc_spr[SPR::XER] &= 0xBFFFFFFFUL;
}
ppc_result_d = (uint32_t)product;
@ -890,7 +894,8 @@ void ppc_mullwodot() {
int64_t product = (int64_t)(int32_t)ppc_result_a * (int64_t)(int32_t)ppc_result_b;
if (product != (int64_t)(int32_t)product) {
ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
} else {
}
else {
ppc_state.ppc_spr[SPR::XER] &= 0xBFFFFFFFUL;
}
ppc_result_d = (uint32_t)product;
@ -911,9 +916,11 @@ void ppc_divw() {
if (!ppc_result_b) { /* handle the "anything / 0" case */
ppc_result_d = (ppc_result_a & 0x80000000) ? -1 : 0; /* UNDOCUMENTED! */
} else if (ppc_result_a == 0x80000000UL && ppc_result_b == 0xFFFFFFFFUL) {
}
else if (ppc_result_a == 0x80000000UL && ppc_result_b == 0xFFFFFFFFUL) {
ppc_result_d = 0xFFFFFFFF;
} else { /* normal signed devision */
}
else { /* normal signed devision */
ppc_result_d = (int32_t)ppc_result_a / (int32_t)ppc_result_b;
}
@ -925,9 +932,11 @@ void ppc_divwdot() {
if (!ppc_result_b) { /* handle the "anything / 0" case */
ppc_result_d = (ppc_result_a & 0x80000000) ? -1 : 0; /* UNDOCUMENTED! */
} else if (ppc_result_a == 0x80000000UL && ppc_result_b == 0xFFFFFFFFUL) {
}
else if (ppc_result_a == 0x80000000UL && ppc_result_b == 0xFFFFFFFFUL) {
ppc_result_d = 0xFFFFFFFF;
} else { /* normal signed devision */
}
else { /* normal signed devision */
ppc_result_d = (int32_t)ppc_result_a / (int32_t)ppc_result_b;
}
@ -941,10 +950,12 @@ void ppc_divwo() {
if (!ppc_result_b) { /* handle the "anything / 0" case */
ppc_result_d = (ppc_result_a & 0x80000000) ? -1 : 0; /* UNDOCUMENTED! */
ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
} else if (ppc_result_a == 0x80000000UL && ppc_result_b == 0xFFFFFFFFUL) {
}
else if (ppc_result_a == 0x80000000UL && ppc_result_b == 0xFFFFFFFFUL) {
ppc_result_d = 0xFFFFFFFF;
ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
} else { /* normal signed devision */
}
else { /* normal signed devision */
ppc_result_d = (int32_t)ppc_result_a / (int32_t)ppc_result_b;
ppc_state.ppc_spr[SPR::XER] &= 0xBFFFFFFFUL;
}
@ -958,10 +969,12 @@ void ppc_divwodot() {
if (!ppc_result_b) { /* handle the "anything / 0" case */
ppc_result_d = (ppc_result_a & 0x80000000) ? -1 : 0; /* UNDOCUMENTED! */
ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
} else if (ppc_result_a == 0x80000000UL && ppc_result_b == 0xFFFFFFFFUL) {
}
else if (ppc_result_a == 0x80000000UL && ppc_result_b == 0xFFFFFFFFUL) {
ppc_result_d = 0xFFFFFFFF;
ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
} else { /* normal signed devision */
}
else { /* normal signed devision */
ppc_result_d = (int32_t)ppc_result_a / (int32_t)ppc_result_b;
ppc_state.ppc_spr[SPR::XER] &= 0xBFFFFFFFUL;
}
@ -975,7 +988,8 @@ void ppc_divwu() {
if (!ppc_result_b) { /* division by zero */
ppc_result_d = 0;
} else {
}
else {
ppc_result_d = ppc_result_a / ppc_result_b;
}
ppc_store_result_regd();
@ -987,7 +1001,8 @@ void ppc_divwudot() {
if (!ppc_result_b) { /* division by zero */
ppc_result_d = 0;
ppc_state.ppc_cr |= 0x20000000;
} else {
}
else {
ppc_result_d = ppc_result_a / ppc_result_b;
ppc_changecrf0(ppc_result_d);
}
@ -1000,7 +1015,8 @@ void ppc_divwuo() {
if (!ppc_result_b) { /* division by zero */
ppc_result_d = 0;
ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
} else {
}
else {
ppc_result_d = ppc_result_a / ppc_result_b;
ppc_state.ppc_spr[SPR::XER] &= 0xBFFFFFFFUL;
}
@ -1013,7 +1029,8 @@ void ppc_divwuodot() {
if (!ppc_result_b) { /* division by zero */
ppc_result_d = 0;
ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
} else {
}
else {
ppc_result_d = ppc_result_a / ppc_result_b;
ppc_state.ppc_spr[SPR::XER] &= 0xBFFFFFFFUL;
}
@ -1027,7 +1044,8 @@ void ppc_slw() {
ppc_grab_regssab();
if (ppc_result_b & 0x20) {
ppc_result_a = 0;
} else {
}
else {
ppc_result_a = ppc_result_d << (ppc_result_b & 0x1F);
}
ppc_store_result_rega();
@ -1037,7 +1055,8 @@ void ppc_slwdot() {
ppc_grab_regssab();
if (ppc_result_b & 0x20) {
ppc_result_a = 0;
} else {
}
else {
ppc_result_a = ppc_result_d << (ppc_result_b & 0x1F);
}
ppc_changecrf0(ppc_result_a);
@ -1048,7 +1067,8 @@ void ppc_srw() {
ppc_grab_regssab();
if (ppc_result_b & 0x20) {
ppc_result_a = 0;
} else {
}
else {
ppc_result_a = ppc_result_d >> (ppc_result_b & 0x1F);
}
ppc_store_result_rega();
@ -1058,7 +1078,8 @@ void ppc_srwdot() {
ppc_grab_regssab();
if (ppc_result_b & 0x20) {
ppc_result_a = 0;
} else {
}
else {
ppc_result_a = ppc_result_d >> (ppc_result_b & 0x1F);
}
ppc_changecrf0(ppc_result_a);
@ -1070,13 +1091,15 @@ void ppc_sraw() {
if (ppc_result_b & 0x20) {
ppc_result_a = (int32_t)ppc_result_d >> 31;
ppc_state.ppc_spr[SPR::XER] |= (ppc_result_a & 1) << 29;
} else {
}
else {
uint32_t shift = ppc_result_b & 0x1F;
uint32_t mask = (1 << shift) - 1;
ppc_result_a = (int32_t)ppc_result_d >> shift;
if ((ppc_result_d & 0x80000000UL) && (ppc_result_d & mask)) {
ppc_state.ppc_spr[SPR::XER] |= 0x20000000UL;
} else {
}
else {
ppc_state.ppc_spr[SPR::XER] &= 0xDFFFFFFFUL;
}
}
@ -1088,13 +1111,15 @@ void ppc_srawdot() {
if (ppc_result_b & 0x20) {
ppc_result_a = (int32_t)ppc_result_d >> 31;
ppc_state.ppc_spr[SPR::XER] |= (ppc_result_a & 1) << 29;
} else {
}
else {
uint32_t shift = ppc_result_b & 0x1F;
uint32_t mask = (1 << shift) - 1;
ppc_result_a = (int32_t)ppc_result_d >> shift;
if ((ppc_result_d & 0x80000000UL) && (ppc_result_d & mask)) {
ppc_state.ppc_spr[SPR::XER] |= 0x20000000UL;
} else {
}
else {
ppc_state.ppc_spr[SPR::XER] &= 0xDFFFFFFFUL;
}
}
@ -1109,7 +1134,8 @@ void ppc_srawi() {
ppc_result_a = (int32_t)ppc_result_d >> shift;
if ((ppc_result_d & 0x80000000UL) && (ppc_result_d & mask)) {
ppc_state.ppc_spr[SPR::XER] |= 0x20000000UL;
} else {
}
else {
ppc_state.ppc_spr[SPR::XER] &= 0xDFFFFFFFUL;
}
ppc_store_result_rega();
@ -1122,7 +1148,8 @@ void ppc_srawidot() {
ppc_result_a = (int32_t)ppc_result_d >> shift;
if ((ppc_result_d & 0x80000000UL) && (ppc_result_d & mask)) {
ppc_state.ppc_spr[SPR::XER] |= 0x20000000UL;
} else {
}
else {
ppc_state.ppc_spr[SPR::XER] &= 0xDFFFFFFFUL;
}
ppc_changecrf0(ppc_result_a);