Commit graph

7 commits

Author SHA1 Message Date
ameerj
923decae5a common: Reduce unused includes 2022-03-19 15:01:31 -04:00
ReinUsesLisp
b3587102d1 core/memory: Read and write page table atomically
Squash attributes into the pointer's integer, making them an uintptr_t
pair containing 2 bits at the bottom and then the pointer. These bits
are currently unused thanks to alignment requirements.

Configure Dynarmic to mask out these bits on pointer reads.

While we are at it, remove some unused attributes carried over from
Citra.

Read/Write and other hot functions use a two step unpacking process that
is less readable to stop MSVC from emitting an extra AND instruction in
the hot path:

 mov         rdi,rcx
 shr         rdx,0Ch
 mov         r8,qword ptr [rax+8]
 mov         rax,qword ptr [r8+rdx*8]
 mov         rdx,rax
-and         al,3
 and         rdx,0FFFFFFFFFFFFFFFCh
 je          Core::Memory::Memory::Impl::Read<unsigned char>
 mov         rax,qword ptr [vaddr]
 movzx       eax,byte ptr [rdx+rax]
2020-12-29 21:54:49 -03:00
Lioncash
412044960a virtual_buffer: Do nothing on resize() calls with same sizes
Prevents us from churning memory by freeing and reallocating a memory
block that would have already been adequate as is.
2020-11-19 07:54:03 -05:00
Lioncash
0ca91ced2d virtual_buffer: Add compile-time type-safety guarantees with VirtualBuffer
VirtualBuffer makes use of VirtualAlloc (on Windows) and mmap() (on
other platforms). Neither of these ensure that non-trivial objects are
properly constructed in the allocated memory.

To prevent potential undefined behavior occurring due to that, we can
add a static assert to loudly complain about cases where that is done.
2020-11-17 20:09:58 -05:00
Lioncash
b3c8997829 page_table: Allow page tables to be moved
Makes page tables and virtual buffers able to be moved, but not copied,
making the interface more flexible.

Previously, with the destructor specified, but no move assignment or
constructor specified, they wouldn't be implicitly generated.
2020-11-17 20:08:20 -05:00
Lioncash
df72480395 common: Make use of [[nodiscard]] where applicable
Now that clang-format makes [[nodiscard]] attributes format sensibly, we
can apply them to several functions within the common library to allow
the compiler to complain about any misuses of the functions.
2020-08-15 17:17:52 -04:00
bunnei
4ba2428c86 common: Add VirtualBuffer class, to abstract memory virtualization. 2020-04-17 00:59:31 -04:00