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SPU LLVM: reintroduce branch patchpoints

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Previously only used on SPU ASMJIT, may improve perf in some cases.
Now refactored to spu_runtime::make_branch_patchpoint.
This commit is contained in:
Nekotekina 2019-02-28 01:08:18 +03:00
parent 7f6a410770
commit fb64b28886
3 changed files with 79 additions and 40 deletions
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28
rpcs3/Emu/Cell/SPUASMJITRecompiler.cpp
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@ -947,35 +947,11 @@ void spu_recompiler::branch_fixed(u32 target)
return;
}
c->mov(x86::rax, imm_ptr(spu_runtime::g_dispatcher + target / 4));
c->mov(x86::rax, x86::qword_ptr(x86::rax));
c->mov(SPU_OFF_32(pc), target);
c->xor_(qw0->r32(), qw0->r32());
c->cmp(SPU_OFF_32(state), 0);
c->jnz(label_stop);
if (false)
{
// Don't generate patch points (TODO)
c->xor_(qw0->r32(), qw0->r32());
c->jmp(x86::rax);
return;
}
// Set patch address as a third argument and fallback to it
Label patch_point = c->newLabel();
c->lea(*qw0, x86::qword_ptr(patch_point));
// Need to emit exactly one executable instruction within 8 bytes
c->align(kAlignCode, 8);
c->bind(patch_point);
//c->dq(0x841f0f);
c->jmp(imm_ptr(&spu_recompiler_base::branch));
// Fallback to the branch via dispatcher
c->align(kAlignCode, 8);
c->xor_(qw0->r32(), qw0->r32());
c->jmp(x86::rax);
c->jmp(imm_ptr(m_spurt->make_branch_patchpoint(target)));
}
void spu_recompiler::branch_indirect(spu_opcode_t op, bool jt, bool ret)