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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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28
cpu/ppc/ppcfpopcodes.cpp
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@ -1031,8 +1031,9 @@ void dppc_interpreter::ppc_lfsu(uint32_t opcode) {
if (reg_a != 0) {
uint32_t ea = int32_t(int16_t(opcode));
ea += val_reg_a;
uint32_t result = mmu_read_vmem<uint32_t>(opcode, ea);
ppc_state.fpr[reg_d].dbl64_r = *(float*)(&result);
uint32_t result = mmu_read_vmem<uint32_t>(opcode, ea);
ppc_store_fpresult_flt(reg_d, *(float*)(&result));
ppc_store_iresult_reg(reg_a, ea);
}
else {
ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP);
@ -1049,12 +1050,12 @@ void dppc_interpreter::ppc_lfsx(uint32_t opcode) {
void dppc_interpreter::ppc_lfsux(uint32_t opcode) {
ppc_grab_regsfpdiab(opcode);
if (reg_a != 0) {
uint32_t ea = val_reg_a + val_reg_b;
uint32_t result = mmu_read_vmem<uint32_t>(opcode, ea);
ppc_state.fpr[reg_d].dbl64_r = *(float*)(&result);
}
uint32_t ea = val_reg_a + val_reg_b;
uint32_t result = mmu_read_vmem<uint32_t>(opcode, ea);
ppc_store_fpresult_flt(reg_d, *(float*)(&result));
ppc_store_iresult_reg(reg_a, ea);
}
else {
ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP);
return;
@ -1077,11 +1078,11 @@ void dppc_interpreter::ppc_lfdu(uint32_t opcode) {
ea += val_reg_a;
uint64_t ppc_result64_d = mmu_read_vmem<uint64_t>(opcode, ea);
ppc_store_fpresult_int(reg_d, ppc_result64_d);
}
ppc_store_iresult_reg(reg_a, ea);
}
else {
ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP);
}
}
}
void dppc_interpreter::ppc_lfdx(uint32_t opcode) {
@ -1093,12 +1094,13 @@ void dppc_interpreter::ppc_lfdx(uint32_t opcode) {
void dppc_interpreter::ppc_lfdux(uint32_t opcode) {
ppc_grab_regsfpdiab(opcode);
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);
ppc_store_fpresult_int(reg_d, ppc_result64_d);
}
ppc_store_iresult_reg(reg_a, ea);
}
else {
ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP);
}