Abstract: A data processing system including multiple execution pipelines each having multiple execution stages E1, E2, E3 may have instructions issued together in parallel despite a data dependency therebetween if it is detected that the result operand value for the older instruction will be generated in an execution stage prior to an execution stage which requires that result operand value as an input operand value to the younger instruction and accordingly cross-forwarding of the operand value is possible between the execution pipelines to resolve the data dependency.

Abstract: Techniques for preventing the loss of trace information being transmitted via trace infrastructure are disclosed. A data processing apparatus for processing instructions is provided.

Abstract: Within a multiple instruction pipeline data processing system which supports predication instructions, program instructions are initially decoded upon the assumption that they are predicated. A predication signal is generated within the instruction decoder stages when a predication instruction is detected. The presence or absence of this predication signal can then be used to correct any decoding which has been performed upon the basis of an assumption that the program instructions are predicated. The predication instruction can predicate a variable number of following instructions. The predication instruction can issue in parallel with an instruction which it predicates and yet the proper identification of the predication instruction need not be confirmed until at least some decoding has been performed upon the other program instruction.