public static void Ast(EmitterContext context)
{
InstAst op = context.GetOp <InstAst>();
for (int index = 0; index < (int)op.AlSize + 1; index++)
{
if (op.SrcB + index > RegisterConsts.RegisterZeroIndex)
{
break;
}
Register rd = new Register(op.SrcB + index, RegisterType.Gpr);
if (op.Phys)
{
Operand userAttrOffset = context.ISubtract(GetSrcReg(context, op.SrcA), Const(AttributeConsts.UserAttributeBase));
Operand userAttrIndex = context.ShiftRightU32(userAttrOffset, Const(2));
context.StoreAttribute(Const(AttributeConsts.UserAttributeBase), userAttrIndex, Register(rd));
context.Config.SetUsedFeature(FeatureFlags.OaIndexing);
}
else
{
// TODO: Support indirect stores using Ra.
int offset = op.Imm11 + index * 4;
if (!context.Config.IsUsedOutputAttribute(offset))
{
return;
}
offset = FixedFuncToUserAttribute(context.Config, offset, isOutput: true);
context.FlagAttributeWritten(offset);
Operand dest = op.P ? AttributePerPatch(offset) : Attribute(offset);
context.Copy(dest, Register(rd));
}
}
}
private static void SetUserAttributeUses(ShaderConfig config, InstName name, ulong opCode)
{
int offset;
int count = 1;
bool isStore = false;
bool indexed = false;
bool perPatch = false;
if (name == InstName.Ast)
{
InstAst opAst = new InstAst(opCode);
count = (int)opAst.AlSize + 1;
offset = opAst.Imm11;
indexed = opAst.Phys;
perPatch = opAst.P;
isStore = true;
}
else if (name == InstName.Ald)
{
InstAld opAld = new InstAld(opCode);
count = (int)opAld.AlSize + 1;
offset = opAld.Imm11;
indexed = opAld.Phys;
perPatch = opAld.P;
isStore = opAld.O;
}
else /* if (name == InstName.Ipa) */
{
InstIpa opIpa = new InstIpa(opCode);
offset = opIpa.Imm10;
indexed = opIpa.Idx;
}
if (indexed)
{
if (isStore)
{
config.SetAllOutputUserAttributes();
}
else
{
config.SetAllInputUserAttributes();
}
}
else
{
for (int elemIndex = 0; elemIndex < count; elemIndex++)
{
int attr = offset + elemIndex * 4;
if (attr >= AttributeConsts.UserAttributeBase && attr < AttributeConsts.UserAttributeEnd)
{
int index = (attr - AttributeConsts.UserAttributeBase) / 16;
if (isStore)
{
config.SetOutputUserAttribute(index, perPatch);
}
else
{
config.SetInputUserAttribute(index, perPatch);
}
}
if (!isStore &&
((attr >= AttributeConsts.FrontColorDiffuseR && attr < AttributeConsts.ClipDistance0) ||
(attr >= AttributeConsts.TexCoordBase && attr < AttributeConsts.TexCoordEnd)))
{
config.SetUsedFeature(FeatureFlags.FixedFuncAttr);
}
}
}
}
