OrdinaryMagician/vkdoom_m
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- modify exception checks to jump ahead if the exception is to be thrown as it limits static misprediction

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This commit is contained in:
Magnus Norddahl 2018-11-10 22:48:20 +01:00
commit e6023c55a8
5 changed files with 77 additions and 93 deletions
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40
src/scripting/vm/jit_flow.cpp
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@ -50,11 +50,9 @@ void JitCompiler::EmitIJMP()
void JitCompiler::EmitVTBL()
{
auto notnull = cc.newLabel();
auto label = EmitThrowExceptionLabel(X_READ_NIL);
cc.test(regA[B], regA[B]);
cc.jnz(notnull);
EmitThrowException(X_READ_NIL);
cc.bind(notnull);
cc.jz(label);
auto result = newResultIntPtr();
auto call = CreateCall<VMFunction*, DObject*, int>([](DObject *o, int c) -> VMFunction* {
@ -70,11 +68,9 @@ void JitCompiler::EmitVTBL()
void JitCompiler::EmitSCOPE()
{
auto notnull = cc.newLabel();
auto label = EmitThrowExceptionLabel(X_READ_NIL);
cc.test(regA[A], regA[A]);
cc.jnz(notnull);
EmitThrowException(X_READ_NIL);
cc.bind(notnull);
cc.jz(label);
auto f = newTempIntPtr();
cc.mov(f, asmjit::imm_ptr(konsta[C].v));
@ -355,48 +351,50 @@ void JitCompiler::EmitTHROW()
void JitCompiler::EmitBOUND()
{
auto cursor = cc.getCursor();
auto label = cc.newLabel();
cc.cmp(regD[A], (int)BC);
cc.jb(label);
cc.bind(label);
auto call = CreateCall<void, VMScriptFunction *, VMOP *, int, int>(&JitCompiler::ThrowArrayOutOfBounds);
call->setArg(0, asmjit::imm_ptr(sfunc));
call->setArg(1, asmjit::imm_ptr(pc));
call->setArg(2, regD[A]);
call->setArg(3, asmjit::imm(BC));
cc.setCursor(cursor);
cc.bind(label);
cc.cmp(regD[A], (int)BC);
cc.jae(label);
}
void JitCompiler::EmitBOUND_K()
{
auto cursor = cc.getCursor();
auto label = cc.newLabel();
cc.cmp(regD[A], (int)konstd[BC]);
cc.jb(label);
cc.bind(label);
auto call = CreateCall<void, VMScriptFunction *, VMOP *, int, int>(&JitCompiler::ThrowArrayOutOfBounds);
call->setArg(0, asmjit::imm_ptr(sfunc));
call->setArg(1, asmjit::imm_ptr(pc));
call->setArg(2, regD[A]);
call->setArg(3, asmjit::imm(konstd[BC]));
cc.setCursor(cursor);
cc.bind(label);
cc.cmp(regD[A], (int)konstd[BC]);
cc.jae(label);
}
void JitCompiler::EmitBOUND_R()
{
auto cursor = cc.getCursor();
auto label = cc.newLabel();
cc.cmp(regD[A], regD[B]);
cc.jb(label);
cc.bind(label);
auto call = CreateCall<void, VMScriptFunction *, VMOP *, int, int>(&JitCompiler::ThrowArrayOutOfBounds);
call->setArg(0, asmjit::imm_ptr(sfunc));
call->setArg(1, asmjit::imm_ptr(pc));
call->setArg(2, regD[A]);
call->setArg(3, regD[B]);
cc.setCursor(cursor);
cc.bind(label);
cc.cmp(regD[A], regD[B]);
cc.jae(label);
}
void JitCompiler::ThrowArrayOutOfBounds(VMScriptFunction *func, VMOP *line, int index, int size)