public static void Isberd(EmitterContext context)
{
InstIsberd op = context.GetOp <InstIsberd>();
// This instruction performs a load from ISBE memory,
// however it seems to be only used to get some vertex
// input data, so we instead propagate the offset so that
// it can be used on the attribute load.
context.Copy(GetDest(op.Dest), GetSrcReg(context, op.SrcA));
}
public static void Isberd(EmitterContext context)
{
InstIsberd op = context.GetOp <InstIsberd>();
// This instruction performs a load from ISBE (Internal Stage Buffer Entry) memory.
// Here, we just propagate the offset, as the result from this instruction is usually
// used with ALD to perform vertex load on geometry or tessellation shaders.
// The offset is calculated as (PrimitiveIndex * VerticesPerPrimitive) + VertexIndex.
// Since we hardcode PrimitiveIndex to zero, then the offset will be just VertexIndex.
context.Copy(GetDest(op.Dest), GetSrcReg(context, op.SrcA));
}
