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Recompiler now only recompiles a block after seeing it twice. Improves performance on stuff that uses self modifying code - eg Doom, Duke Nukem 3D, Windows 95 idle

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This commit is contained in:
SarahW 2016-07-31 12:33:37 +01:00
commit 42237ac1f8
4 changed files with 299 additions and 130 deletions
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84
src/386_dynarec.c
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@ -1356,7 +1356,7 @@ void exec386_dynarec(int cycs)
}
}
if (valid_block)
if (valid_block && block->was_recompiled)
{
void (*code)() = (void *)&block->data[BLOCK_START];
@ -1373,7 +1373,7 @@ inrecomp=0;
insc += codeblock_ins[index];*/
/* pclog("Exit block now %04X:%04X\n", CS, pc);*/
}
else if (!abrt)
else if (valid_block && !abrt)
{
uint32_t start_page = cpu_state.pc >> 12;
uint32_t start_pc = cpu_state.pc;
@ -1384,7 +1384,7 @@ inrecomp=0;
cpu_new_blocks++;
codegen_block_init(phys_addr);
codegen_block_start_recompile(block);
codegen_in_recompile = 1;
// if (output) pclog("Recompile block at %04x:%04x %04x %04x %04x %04x %04x %04x ESP=%04x %04x %02x%02x:%02x%02x %02x%02x:%02x%02x %02x%02x:%02x%02x\n", CS, pc, AX, BX, CX, DX, SI, DI, ESP, BP, ram[0x116330+0x6df4+0xa+3], ram[0x116330+0x6df4+0xa+2], ram[0x116330+0x6df4+0xa+1], ram[0x116330+0x6df4+0xa+0], ram[0x11d136+3],ram[0x11d136+2],ram[0x11d136+1],ram[0x11d136+0], ram[(0x119abe)+0x3],ram[(0x119abe)+0x2],ram[(0x119abe)+0x1],ram[(0x119abe)+0x0]);
@ -1447,12 +1447,88 @@ inrecomp=0;
}
if (!abrt && !x86_was_reset)
codegen_block_end();
codegen_block_end_recompile(block);
if (x86_was_reset)
codegen_reset();
codegen_in_recompile = 0;
// output &= ~2;
}
else if (!abrt)
{
/*Mark block but do not recompile*/
uint32_t start_page = cpu_state.pc >> 12;
uint32_t start_pc = cpu_state.pc;
// pclog("Hash %08x %i\n", codeblock_hash_pc[HASH(cs + pc)], codeblock_page_dirty[(cs + pc) >> 12]);
cpu_block_end = 0;
x86_was_reset = 0;
// cpu_new_blocks++;
codegen_block_init(phys_addr);
// if (output) pclog("Recompile block at %04x:%04x %04x %04x %04x %04x %04x %04x ESP=%04x %04x %02x%02x:%02x%02x %02x%02x:%02x%02x %02x%02x:%02x%02x\n", CS, pc, AX, BX, CX, DX, SI, DI, ESP, BP, ram[0x116330+0x6df4+0xa+3], ram[0x116330+0x6df4+0xa+2], ram[0x116330+0x6df4+0xa+1], ram[0x116330+0x6df4+0xa+0], ram[0x11d136+3],ram[0x11d136+2],ram[0x11d136+1],ram[0x11d136+0], ram[(0x119abe)+0x3],ram[(0x119abe)+0x2],ram[(0x119abe)+0x1],ram[(0x119abe)+0x0]);
while (!cpu_block_end)
{
oldcs=CS;
oldpc=cpu_state.pc;
oldcpl=CPL;
op32=use32;
ea_seg = &_ds;
ssegs = 0;
codegen_endpc = (cs + cpu_state.pc) + 8;
fetchdat = fastreadl(cs + cpu_state.pc);
if (!abrt)
{
trap = flags & T_FLAG;
opcode = fetchdat & 0xFF;
fetchdat >>= 8;
// if (output == 3)
// pclog("%04X(%06X):%04X : %08X %08X %08X %08X %04X %04X %04X(%08X) %04X %04X %04X(%08X) %08X %08X %08X SP=%04X:%08X %02X %04X %i %08X %08X %i %i %02X %02X %02X %02X %02X %08x %08x\n",CS,cs,pc,EAX,EBX,ECX,EDX,CS,DS,ES,es,FS,GS,SS,ss,EDI,ESI,EBP,SS,ESP,opcode,flags,ins,0, ldt.base, CPL, stack32, pic.pend, pic.mask, pic.mask2, pic2.pend, pic2.mask, cs+pc, pccache);
cpu_state.pc++;
x86_opcodes[(opcode | op32) & 0x3ff](fetchdat);
if (x86_was_reset)
break;
}
if (!use32) cpu_state.pc &= 0xffff;
/*Cap source code at 4000 bytes per block; this
will prevent any block from spanning more than
2 pages. In practice this limit will never be
hit, as host block size is only 2kB*/
if ((cpu_state.pc - start_pc) > 4000)
CPU_BLOCK_END();
if (trap)
CPU_BLOCK_END();
if (abrt)
{
codegen_block_remove();
CPU_BLOCK_END();
}
ins++;
insc++;
}
if (!abrt && !x86_was_reset)
codegen_block_end();
if (x86_was_reset)
codegen_reset();
// output &= ~2;
}
// if (output && (SP & 1))