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https://github.com/dingusdev/dingusppc.git
synced 2024-06-09 07:29:36 +00:00
Implemeted limited simplified mnemonics for rlwinm
This commit is contained in:
dingusdev
parent
a934ed5bde
commit
30b1116393
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@ -287,6 +287,34 @@ void opc_rlwinm(PPCDisasmContext* ctx)
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auto mb = (ctx->instr_code >> 6) & 0x1F;
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auto me = (ctx->instr_code >> 1) & 0x1F;
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if (ctx->simplified) {
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if (mb == 0) {
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if (me < 32) {
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if (sh == (31 - me)) {
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fmt_threeop(ctx->instr_str, "slwi", rs, ra, sh);
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return;
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}
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if (sh == 0) {
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fmt_threeop(ctx->instr_str, "clrrwi", rs, ra, mb);
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return;
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}
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}
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if (me == 31) {
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fmt_threeop(ctx->instr_str, "rotlwi", rs, ra, sh);
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return;
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}
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if (me > 0){
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ctx->instr_str = my_sprintf("%-8sr%d, r%d, %d, %d", "extlwi", rs, ra, sh, me);
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return;
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}
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}
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}
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if (ctx->instr_code & 1)
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fmt_rotateop(ctx->instr_str, "rlwinm.", rs, ra, sh, mb, me, true);
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else
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@ -136,10 +136,12 @@ void ppc_changecrf0(uint32_t set_result) {
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if (set_result == 0) {
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ppc_state.ppc_cr |= 0x20000000UL;
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} else {
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}
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else {
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if (set_result & 0x80000000) {
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ppc_state.ppc_cr |= 0x80000000UL;
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} else {
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}
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else {
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ppc_state.ppc_cr |= 0x40000000UL;
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}
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}
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@ -172,7 +174,8 @@ inline void ppc_carry_sub(uint32_t a, uint32_t b) {
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inline void ppc_setsoov(uint32_t a, uint32_t b, uint32_t d) {
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if ((a ^ b) & (a ^ d) & 0x80000000UL) {
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ppc_state.ppc_spr[SPR::XER] |= 0xC0000000UL;
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} else {
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}
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else {
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ppc_state.ppc_spr[SPR::XER] &= 0xBFFFFFFFUL;
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}
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}
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@ -878,7 +881,8 @@ void ppc_mullwo() {
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int64_t product = (int64_t)(int32_t)ppc_result_a * (int64_t)(int32_t)ppc_result_b;
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if (product != (int64_t)(int32_t)product) {
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ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
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} else {
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}
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else {
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ppc_state.ppc_spr[SPR::XER] &= 0xBFFFFFFFUL;
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}
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ppc_result_d = (uint32_t)product;
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@ -890,7 +894,8 @@ void ppc_mullwodot() {
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int64_t product = (int64_t)(int32_t)ppc_result_a * (int64_t)(int32_t)ppc_result_b;
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if (product != (int64_t)(int32_t)product) {
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ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
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} else {
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}
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else {
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ppc_state.ppc_spr[SPR::XER] &= 0xBFFFFFFFUL;
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}
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ppc_result_d = (uint32_t)product;
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@ -911,9 +916,11 @@ void ppc_divw() {
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if (!ppc_result_b) { /* handle the "anything / 0" case */
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ppc_result_d = (ppc_result_a & 0x80000000) ? -1 : 0; /* UNDOCUMENTED! */
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} else if (ppc_result_a == 0x80000000UL && ppc_result_b == 0xFFFFFFFFUL) {
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}
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else if (ppc_result_a == 0x80000000UL && ppc_result_b == 0xFFFFFFFFUL) {
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ppc_result_d = 0xFFFFFFFF;
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} else { /* normal signed devision */
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}
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else { /* normal signed devision */
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ppc_result_d = (int32_t)ppc_result_a / (int32_t)ppc_result_b;
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}
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@ -925,9 +932,11 @@ void ppc_divwdot() {
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if (!ppc_result_b) { /* handle the "anything / 0" case */
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ppc_result_d = (ppc_result_a & 0x80000000) ? -1 : 0; /* UNDOCUMENTED! */
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} else if (ppc_result_a == 0x80000000UL && ppc_result_b == 0xFFFFFFFFUL) {
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}
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else if (ppc_result_a == 0x80000000UL && ppc_result_b == 0xFFFFFFFFUL) {
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ppc_result_d = 0xFFFFFFFF;
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} else { /* normal signed devision */
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}
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else { /* normal signed devision */
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ppc_result_d = (int32_t)ppc_result_a / (int32_t)ppc_result_b;
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}
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@ -941,10 +950,12 @@ void ppc_divwo() {
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if (!ppc_result_b) { /* handle the "anything / 0" case */
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ppc_result_d = (ppc_result_a & 0x80000000) ? -1 : 0; /* UNDOCUMENTED! */
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ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
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} else if (ppc_result_a == 0x80000000UL && ppc_result_b == 0xFFFFFFFFUL) {
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}
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else if (ppc_result_a == 0x80000000UL && ppc_result_b == 0xFFFFFFFFUL) {
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ppc_result_d = 0xFFFFFFFF;
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ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
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} else { /* normal signed devision */
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}
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else { /* normal signed devision */
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ppc_result_d = (int32_t)ppc_result_a / (int32_t)ppc_result_b;
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ppc_state.ppc_spr[SPR::XER] &= 0xBFFFFFFFUL;
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}
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@ -958,10 +969,12 @@ void ppc_divwodot() {
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if (!ppc_result_b) { /* handle the "anything / 0" case */
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ppc_result_d = (ppc_result_a & 0x80000000) ? -1 : 0; /* UNDOCUMENTED! */
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ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
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} else if (ppc_result_a == 0x80000000UL && ppc_result_b == 0xFFFFFFFFUL) {
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}
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else if (ppc_result_a == 0x80000000UL && ppc_result_b == 0xFFFFFFFFUL) {
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ppc_result_d = 0xFFFFFFFF;
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ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
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} else { /* normal signed devision */
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}
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else { /* normal signed devision */
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ppc_result_d = (int32_t)ppc_result_a / (int32_t)ppc_result_b;
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ppc_state.ppc_spr[SPR::XER] &= 0xBFFFFFFFUL;
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}
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@ -975,7 +988,8 @@ void ppc_divwu() {
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if (!ppc_result_b) { /* division by zero */
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ppc_result_d = 0;
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} else {
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}
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else {
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ppc_result_d = ppc_result_a / ppc_result_b;
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}
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ppc_store_result_regd();
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@ -987,7 +1001,8 @@ void ppc_divwudot() {
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if (!ppc_result_b) { /* division by zero */
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ppc_result_d = 0;
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ppc_state.ppc_cr |= 0x20000000;
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} else {
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}
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else {
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ppc_result_d = ppc_result_a / ppc_result_b;
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ppc_changecrf0(ppc_result_d);
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}
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@ -1000,7 +1015,8 @@ void ppc_divwuo() {
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if (!ppc_result_b) { /* division by zero */
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ppc_result_d = 0;
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ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
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} else {
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}
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else {
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ppc_result_d = ppc_result_a / ppc_result_b;
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ppc_state.ppc_spr[SPR::XER] &= 0xBFFFFFFFUL;
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}
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@ -1013,7 +1029,8 @@ void ppc_divwuodot() {
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if (!ppc_result_b) { /* division by zero */
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ppc_result_d = 0;
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ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
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} else {
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}
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else {
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ppc_result_d = ppc_result_a / ppc_result_b;
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ppc_state.ppc_spr[SPR::XER] &= 0xBFFFFFFFUL;
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}
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@ -1027,7 +1044,8 @@ void ppc_slw() {
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ppc_grab_regssab();
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if (ppc_result_b & 0x20) {
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ppc_result_a = 0;
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} else {
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}
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else {
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ppc_result_a = ppc_result_d << (ppc_result_b & 0x1F);
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}
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ppc_store_result_rega();
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@ -1037,7 +1055,8 @@ void ppc_slwdot() {
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ppc_grab_regssab();
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if (ppc_result_b & 0x20) {
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ppc_result_a = 0;
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} else {
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}
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else {
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ppc_result_a = ppc_result_d << (ppc_result_b & 0x1F);
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}
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ppc_changecrf0(ppc_result_a);
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@ -1048,7 +1067,8 @@ void ppc_srw() {
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ppc_grab_regssab();
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if (ppc_result_b & 0x20) {
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ppc_result_a = 0;
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} else {
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}
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else {
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ppc_result_a = ppc_result_d >> (ppc_result_b & 0x1F);
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}
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ppc_store_result_rega();
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@ -1058,7 +1078,8 @@ void ppc_srwdot() {
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ppc_grab_regssab();
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if (ppc_result_b & 0x20) {
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ppc_result_a = 0;
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} else {
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}
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else {
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ppc_result_a = ppc_result_d >> (ppc_result_b & 0x1F);
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}
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ppc_changecrf0(ppc_result_a);
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@ -1070,13 +1091,15 @@ void ppc_sraw() {
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if (ppc_result_b & 0x20) {
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ppc_result_a = (int32_t)ppc_result_d >> 31;
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ppc_state.ppc_spr[SPR::XER] |= (ppc_result_a & 1) << 29;
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} else {
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}
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else {
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uint32_t shift = ppc_result_b & 0x1F;
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uint32_t mask = (1 << shift) - 1;
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uint32_t mask = (1 << shift) - 1;
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ppc_result_a = (int32_t)ppc_result_d >> shift;
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if ((ppc_result_d & 0x80000000UL) && (ppc_result_d & mask)) {
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ppc_state.ppc_spr[SPR::XER] |= 0x20000000UL;
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} else {
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}
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else {
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ppc_state.ppc_spr[SPR::XER] &= 0xDFFFFFFFUL;
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}
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}
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@ -1088,13 +1111,15 @@ void ppc_srawdot() {
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if (ppc_result_b & 0x20) {
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ppc_result_a = (int32_t)ppc_result_d >> 31;
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ppc_state.ppc_spr[SPR::XER] |= (ppc_result_a & 1) << 29;
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} else {
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}
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else {
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uint32_t shift = ppc_result_b & 0x1F;
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uint32_t mask = (1 << shift) - 1;
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uint32_t mask = (1 << shift) - 1;
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ppc_result_a = (int32_t)ppc_result_d >> shift;
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if ((ppc_result_d & 0x80000000UL) && (ppc_result_d & mask)) {
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ppc_state.ppc_spr[SPR::XER] |= 0x20000000UL;
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} else {
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}
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else {
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ppc_state.ppc_spr[SPR::XER] &= 0xDFFFFFFFUL;
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}
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}
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@ -1105,11 +1130,12 @@ void ppc_srawdot() {
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void ppc_srawi() {
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ppc_grab_regssa();
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unsigned shift = (ppc_cur_instruction >> 11) & 0x1F;
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uint32_t mask = (1 << shift) - 1;
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uint32_t mask = (1 << shift) - 1;
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ppc_result_a = (int32_t)ppc_result_d >> shift;
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if ((ppc_result_d & 0x80000000UL) && (ppc_result_d & mask)) {
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ppc_state.ppc_spr[SPR::XER] |= 0x20000000UL;
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} else {
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}
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else {
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ppc_state.ppc_spr[SPR::XER] &= 0xDFFFFFFFUL;
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}
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ppc_store_result_rega();
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@ -1118,11 +1144,12 @@ void ppc_srawi() {
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void ppc_srawidot() {
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ppc_grab_regssa();
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unsigned shift = (ppc_cur_instruction >> 11) & 0x1F;
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uint32_t mask = (1 << shift) - 1;
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uint32_t mask = (1 << shift) - 1;
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ppc_result_a = (int32_t)ppc_result_d >> shift;
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if ((ppc_result_d & 0x80000000UL) && (ppc_result_d & mask)) {
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ppc_state.ppc_spr[SPR::XER] |= 0x20000000UL;
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} else {
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}
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else {
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ppc_state.ppc_spr[SPR::XER] &= 0xDFFFFFFFUL;
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}
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ppc_changecrf0(ppc_result_a);
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@ -1278,11 +1305,11 @@ void ppc_mtspr() {
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switch (ref_spr) {
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//Mirror the TBRs in the SPR range to the user-mode TBRs.
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case 284:
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ppc_state.ppc_spr[284] = (uint32_t)timebase_counter;
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ppc_state.ppc_spr[284] = (uint32_t)timebase_counter;
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ppc_state.ppc_tbr[TBR::TBL] = (uint32_t)timebase_counter;
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break;
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case 285:
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ppc_state.ppc_spr[285] = (uint32_t)(timebase_counter >> 32);
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ppc_state.ppc_spr[285] = (uint32_t)(timebase_counter >> 32);
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ppc_state.ppc_tbr[TBR::TBU] = (uint32_t)(timebase_counter >> 32);
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break;
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case 528:
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@ -1802,8 +1829,8 @@ void ppc_dcbz() {
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if (!(ppc_state.ppc_pc & 32) && (ppc_state.ppc_pc < 0xFFFFFFE0UL)) {
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ppc_grab_regsdab();
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ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
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mem_write_qword(ppc_effective_address, 0);
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mem_write_qword((ppc_effective_address + 8), 0);
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mem_write_qword(ppc_effective_address, 0);
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mem_write_qword((ppc_effective_address + 8), 0);
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mem_write_qword((ppc_effective_address + 16), 0);
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mem_write_qword((ppc_effective_address + 24), 0);
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}
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@ -2411,4 +2438,4 @@ void ppc_tlbsync() {
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supervisor_inst_num++;
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#endif
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printf("Placeholder for tlbsync \n");
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}
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}
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