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ppcfpopcodes: Fix Revert Tweak.

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Fixes lfsu, lfsux, lfdu, lfdux so they correctly update rA as before.
This commit is contained in:
joevt 2024-12-09 22:17:53 -08:00 committed by Maxim Poliakovski
parent bf4ee72c0f
commit 49b8c4c39f
1 changed files with 15 additions and 13 deletions
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18
cpu/ppc/ppcfpopcodes.cpp
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@ -1031,8 +1031,9 @@ void dppc_interpreter::ppc_lfsu(uint32_t opcode) {
if (reg_a != 0) { if (reg_a != 0) {
uint32_t ea = int32_t(int16_t(opcode)); uint32_t ea = int32_t(int16_t(opcode));
ea += val_reg_a; ea += val_reg_a;
uint32_t result = mmu_read_vmem<uint32_t>(opcode, ea); uint32_t result = mmu_read_vmem<uint32_t>(opcode, ea);
ppc_state.fpr[reg_d].dbl64_r = *(float*)(&result); ppc_store_fpresult_flt(reg_d, *(float*)(&result));
ppc_store_iresult_reg(reg_a, ea);
} }
else { else {
ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP); ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP);
@ -1049,11 +1050,11 @@ void dppc_interpreter::ppc_lfsx(uint32_t opcode) {
void dppc_interpreter::ppc_lfsux(uint32_t opcode) { void dppc_interpreter::ppc_lfsux(uint32_t opcode) {
ppc_grab_regsfpdiab(opcode); ppc_grab_regsfpdiab(opcode);
if (reg_a != 0) { if (reg_a != 0) {
uint32_t ea = val_reg_a + val_reg_b; uint32_t ea = val_reg_a + val_reg_b;
uint32_t result = mmu_read_vmem<uint32_t>(opcode, ea); uint32_t result = mmu_read_vmem<uint32_t>(opcode, ea);
ppc_state.fpr[reg_d].dbl64_r = *(float*)(&result); ppc_store_fpresult_flt(reg_d, *(float*)(&result));
ppc_store_iresult_reg(reg_a, ea);
} }
else { else {
ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP); ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP);
@ -1077,8 +1078,8 @@ void dppc_interpreter::ppc_lfdu(uint32_t opcode) {
ea += val_reg_a; ea += val_reg_a;
uint64_t ppc_result64_d = mmu_read_vmem<uint64_t>(opcode, ea); uint64_t ppc_result64_d = mmu_read_vmem<uint64_t>(opcode, ea);
ppc_store_fpresult_int(reg_d, ppc_result64_d); ppc_store_fpresult_int(reg_d, ppc_result64_d);
ppc_store_iresult_reg(reg_a, ea);
} }
else { else {
ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP); ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP);
} }
@ -1095,9 +1096,10 @@ void dppc_interpreter::ppc_lfdux(uint32_t opcode) {
ppc_grab_regsfpdiab(opcode); ppc_grab_regsfpdiab(opcode);
if (reg_a != 0) { if (reg_a != 0) {
uint32_t ea = val_reg_a + val_reg_b; uint32_t ea = val_reg_a + val_reg_b;
uint64_t ppc_result64_d = mmu_read_vmem<uint64_t>(opcode, ea); uint64_t ppc_result64_d = mmu_read_vmem<uint64_t>(opcode, ea);
ppc_store_fpresult_int(reg_d, ppc_result64_d); ppc_store_fpresult_int(reg_d, ppc_result64_d);
ppc_store_iresult_reg(reg_a, ea);
} }
else { else {
ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP); ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP);