private static void EmitBranch(ILEmitterCtx context, Condition cond)
{
OpCodeBImm64 op = (OpCodeBImm64)context.CurrOp;
if (context.CurrBlock.Next != null &&
context.CurrBlock.Branch != null)
{
context.EmitCondBranch(context.GetLabel(op.Imm), cond);
}
else
{
context.EmitStoreState();
ILLabel lblTaken = new ILLabel();
context.EmitCondBranch(lblTaken, cond);
context.EmitLdc_I8(op.Position + 4);
context.Emit(OpCodes.Ret);
context.MarkLabel(lblTaken);
context.EmitLdc_I8(op.Imm);
context.Emit(OpCodes.Ret);
}
}
private static void EmitCsel(ILEmitterCtx context, CselOperation cselOp)
{
OpCodeCsel64 op = (OpCodeCsel64)context.CurrOp;
ILLabel lblTrue = new ILLabel();
ILLabel lblEnd = new ILLabel();
context.EmitCondBranch(lblTrue, op.Cond);
context.EmitLdintzr(op.Rm);
if (cselOp == CselOperation.Increment)
{
context.EmitLdc_I(1);
context.Emit(OpCodes.Add);
}
else if (cselOp == CselOperation.Invert)
{
context.Emit(OpCodes.Not);
}
else if (cselOp == CselOperation.Negate)
{
context.Emit(OpCodes.Neg);
}
context.Emit(OpCodes.Br_S, lblEnd);
context.MarkLabel(lblTrue);
context.EmitLdintzr(op.Rn);
context.MarkLabel(lblEnd);
context.EmitStintzr(op.Rd);
}
private static void EmitCcmp(ILEmitterCtx context, CcmpOp cmpOp)
{
OpCodeCcmp64 op = (OpCodeCcmp64)context.CurrOp;
ILLabel lblTrue = new ILLabel();
ILLabel lblEnd = new ILLabel();
context.EmitCondBranch(lblTrue, op.Cond);
context.EmitLdc_I4((op.Nzcv >> 0) & 1);
context.EmitStflg((int)PState.VBit);
context.EmitLdc_I4((op.Nzcv >> 1) & 1);
context.EmitStflg((int)PState.CBit);
context.EmitLdc_I4((op.Nzcv >> 2) & 1);
context.EmitStflg((int)PState.ZBit);
context.EmitLdc_I4((op.Nzcv >> 3) & 1);
context.EmitStflg((int)PState.NBit);
context.Emit(OpCodes.Br_S, lblEnd);
context.MarkLabel(lblTrue);
EmitAluLoadOpers(context);
if (cmpOp == CcmpOp.Cmp)
{
context.Emit(OpCodes.Sub);
context.EmitZnFlagCheck();
EmitSubsCCheck(context);
EmitSubsVCheck(context);
}
else if (cmpOp == CcmpOp.Cmn)
{
context.Emit(OpCodes.Add);
context.EmitZnFlagCheck();
EmitAddsCCheck(context);
EmitAddsVCheck(context);
}
else
{
throw new ArgumentException(nameof(cmpOp));
}
context.Emit(OpCodes.Pop);
context.MarkLabel(lblEnd);
}
public static void Fccmp_S(ILEmitterCtx context)
{
OpCodeSimdFcond64 op = (OpCodeSimdFcond64)context.CurrOp;
ILLabel lblTrue = new ILLabel();
ILLabel lblEnd = new ILLabel();
context.EmitCondBranch(lblTrue, op.Cond);
EmitSetNzcv(context, op.Nzcv);
context.Emit(OpCodes.Br, lblEnd);
context.MarkLabel(lblTrue);
Fcmp_S(context);
context.MarkLabel(lblEnd);
}
public static void Fcsel_S(ILEmitterCtx context)
{
OpCodeSimdFcond64 op = (OpCodeSimdFcond64)context.CurrOp;
ILLabel lblTrue = new ILLabel();
ILLabel lblEnd = new ILLabel();
context.EmitCondBranch(lblTrue, op.Cond);
EmitVectorExtractF(context, op.Rm, 0, op.Size);
context.Emit(OpCodes.Br_S, lblEnd);
context.MarkLabel(lblTrue);
EmitVectorExtractF(context, op.Rn, 0, op.Size);
context.MarkLabel(lblEnd);
EmitScalarSetF(context, op.Rd, op.Size);
}