Retro/pcem
Watch
1
0
Fork
You've already forked pcem
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Further reductions to codeblock_t size - replace link pointers with uint16_t block indicies, shrink ins to uint8_t, remove endpc. codeblock_t now fits in a 64-byte cacheline on 32-bit platforms.

Browse source
This commit is contained in:
SarahW 2018-11-29 20:05:12 +00:00
commit 9ff1c7f409
9 changed files with 186 additions and 160 deletions
Download patch file Download diff file Expand all files Collapse all files

37
src/codegen_backend_x86.c
View file

@ -270,31 +270,30 @@ pclog(" offsetof(codeblock_t, status)=%i\n", offsetof(codeblock_t, status));
pclog(" offsetof(codeblock_t, flags)=%i\n", offsetof(codeblock_t, flags));
pclog(" offsetof(codeblock_t, ins)=%i\n", offsetof(codeblock_t, ins));
pclog(" offsetof(codeblock_t, TOP)=%i\n", offsetof(codeblock_t, TOP));
pclog(" offsetof(codeblock_t, endpc)=%i\n", offsetof(codeblock_t, endpc));
pclog(" offsetof(codeblock_t, parent)=%i\n", offsetof(codeblock_t, parent));
pclog(" offsetof(codeblock_t, left)=%i\n", offsetof(codeblock_t, left));
pclog(" offsetof(codeblock_t, right)=%i\n", offsetof(codeblock_t, right));
pclog(" offsetof(codeblock_t, data)=%i\n", offsetof(codeblock_t, data));
pclog(" offsetof(codeblock_t, page_mask=%i\n", offsetof(codeblock_t, page_mask));
pclog(" offsetof(codeblock_t, page_mask2=%i\n", offsetof(codeblock_t, page_mask2));
pclog(" offsetof(codeblock_t, dirty_mask=%i\n", offsetof(codeblock_t, dirty_mask));
pclog(" offsetof(codeblock_t, dirty_mask2=%i\n", offsetof(codeblock_t, dirty_mask2));
pclog(" offsetof(codeblock_t, prev=%i\n", offsetof(codeblock_t, prev));
pclog(" offsetof(codeblock_t, next=%i\n", offsetof(codeblock_t, next));
pclog(" offsetof(codeblock_t, prev_2=%i\n", offsetof(codeblock_t, prev_2));
pclog(" offsetof(codeblock_t, next_2=%i\n", offsetof(codeblock_t, next_2));
pclog(" offsetof(codeblock_t, parent=%i\n", offsetof(codeblock_t, parent));
pclog(" offsetof(codeblock_t, left=%i\n", offsetof(codeblock_t, left));
pclog(" offsetof(codeblock_t, right=%i\n", offsetof(codeblock_t, right));
codeblock = malloc((BLOCK_SIZE+1) * sizeof(codeblock_t));
pclog(" offsetof(codeblock_t, page_mask)=%i\n", offsetof(codeblock_t, page_mask));
pclog(" offsetof(codeblock_t, page_mask2)=%i\n", offsetof(codeblock_t, page_mask2));
pclog(" offsetof(codeblock_t, dirty_mask)=%i\n", offsetof(codeblock_t, dirty_mask));
pclog(" offsetof(codeblock_t, dirty_mask2)=%i\n", offsetof(codeblock_t, dirty_mask2));
pclog(" offsetof(codeblock_t, prev)=%i\n", offsetof(codeblock_t, prev));
pclog(" offsetof(codeblock_t, next)=%i\n", offsetof(codeblock_t, next));
pclog(" offsetof(codeblock_t, prev_2)=%i\n", offsetof(codeblock_t, prev_2));
pclog(" offsetof(codeblock_t, next_2)=%i\n", offsetof(codeblock_t, next_2));
codeblock = malloc(BLOCK_SIZE * sizeof(codeblock_t));
#if defined WIN32 || defined _WIN32 || defined _WIN32
codeblock_data = VirtualAlloc(NULL, (BLOCK_SIZE+1) * BLOCK_DATA_SIZE, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
codeblock_data = VirtualAlloc(NULL, BLOCK_SIZE * BLOCK_DATA_SIZE, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
#else
codeblock_data = malloc((BLOCK_SIZE+1) * BLOCK_DATA_SIZE;
codeblock_data = malloc(BLOCK_SIZE * BLOCK_DATA_SIZE;
#endif
codeblock_hash = malloc(HASH_SIZE * sizeof(codeblock_t *));
memset(codeblock, 0, (BLOCK_SIZE+1) * sizeof(codeblock_t));
memset(codeblock, 0, BLOCK_SIZE * sizeof(codeblock_t));
memset(codeblock_hash, 0, HASH_SIZE * sizeof(codeblock_t *));
for (c = 0; c < BLOCK_SIZE + 1; c++)
for (c = 0; c < BLOCK_SIZE; c++)
{
codeblock[c].data = &codeblock_data[c * BLOCK_DATA_SIZE];
codeblock[c].pc = BLOCK_PC_INVALID;
@ -302,7 +301,7 @@ pclog(" offsetof(codeblock_t, right=%i\n", offsetof(codeblock_t, right));
#if defined(__linux__) || defined(__APPLE__)
start = (void *)((long)codeblock_data & pagemask);
len = (((BLOCK_SIZE+1) * BLOCK_DATA_SIZE) + pagesize) & pagemask;
len = ((BLOCK_SIZE * BLOCK_DATA_SIZE) + pagesize) & pagemask;
if (mprotect(start, len, PROT_READ | PROT_WRITE | PROT_EXEC) != 0)
{
perror("mprotect");
@ -311,7 +310,7 @@ pclog(" offsetof(codeblock_t, right=%i\n", offsetof(codeblock_t, right));
#endif
// pclog("Codegen is %p\n", (void *)pages[0xfab12 >> 12].block);
block_current = BLOCK_SIZE;
block_current = 0;
block_pos = 0;
mem_abrt_rout = &codeblock[block_current].data[block_pos];
addbyte(0x83); /*ADDL $16+4,%esp*/