Data processing

A data processing method comprising:

• executing program instructions in an instruction execution order;
• storing information on a set of instructions for which execution has been initiated, including providing ordering information indicating the relative position of each instruction in the set of instructions with respect to a program code order;
• committing the results of executed instructions;
• setting one or more cumulative status registers in response to a respective condition generated by execution of an instruction, a cumulative status register which has been set then remaining set until an unset instruction is executed;
• and
• storing for at least those of the one or more cumulative status registers which are not currently set, an identifier of an instruction which is earliest in the program code order in the set of instructions and which generated a condition to set that cumulative status register;
• setting a currently unset cumulative status register in response to an instruction identified in the identifier store being committed;
• wherein the step of storing information comprises accessing the information about the set of instructions according to the respective identifiers of those instructions;
• and
• inhibiting the re-use of an identifier until after the setting of the cumulative status register.

Data processing circuitry comprising:

• means for executing program instructions in an instruction execution order;
• means for storing information on a set of instructions for which execution has been initiated, including providing ordering information indicating the relative position of each instruction in the set of instructions with respect to a program code order;
• means for committing the results of executed instructions;
• means for setting one or more cumulative status registers in response to a respective condition generated by execution of an instruction, a cumulative status register which has been set then remaining set until an unset instruction is executed;
• and
• means for storing for at least those of the one or more cumulative status registers which are not currently set, an identifier of an instruction which is earliest in the program code order in the set of instructions and which generated a condition to set that cumulative status register;
• means for setting a currently unset cumulative status register in response to an instruction identified in the identifier store being committed;
• wherein the means for storing information is operable to access the information about the set of instructions according to the respective identifiers of those instructions;
• and
• means for inhibiting the re-use of an identifier until after the setting of the cumulative status register.