Macintosh-Tools/dingusppc
1
0
Fork 0
mirror of https://github.com/dingusdev/dingusppc.git synced 2025-01-11 05:29:43 +00:00
Code Issues Projects Releases Wiki Activity

ppcopcodes: fix dcbz for BlockZero in Mac OS 8.x

Browse Source
This commit is contained in:
Maxim Poliakovski 2023-06-17 20:57:48 +02:00
parent ee7b2838bc
commit 73d0356058
1 changed files with 7 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
cpu/ppc/ppcopcodes.cpp
View File

@ -1487,12 +1487,14 @@ void dppc_interpreter::ppc_dcbz() {
ppc_grab_regsdab();
ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
ppc_effective_address &= 0xFFFFFFE0; // align EA on a 32-byte boundary
ppc_effective_address &= 0xFFFFFFE0UL; // align EA on a 32-byte boundary
//mem_write_qword(ppc_effective_address, 0);
//mem_write_qword((ppc_effective_address + 8), 0);
//mem_write_qword((ppc_effective_address + 16), 0);
//mem_write_qword((ppc_effective_address + 24), 0);
// the following is not especially efficient but necessary
// to make BlockZero under Mac OS 8.x and later to work
mmu_write_vmem<uint64_t>(ppc_effective_address + 0, 0);
mmu_write_vmem<uint64_t>(ppc_effective_address + 8, 0);
mmu_write_vmem<uint64_t>(ppc_effective_address + 16, 0);
mmu_write_vmem<uint64_t>(ppc_effective_address + 24, 0);
}