Data processor having resources and execution start control for starting execution of succeeding instruction in resource before completion of preceding instruction

A data processor comprising:

• (a) a plurality of resource means, each of said resource means being responsive to execution start of an instruction executable thereby among a set of instructions to be executed by the data processor, for executing a sequence of processing required by the instruction, wherein said plurality of resource means includes first and second resource means both of which can execute a same predetermined instruction;
• (b) a plurality of execution start control means, each of the execution start control means being provided for a corresponding one of the plurality of resource means, for controlling start of execution of instructions executable by said corresponding resource means, among the set of instructions, each of said execution start control means including:
• (b1) instruction holding means for holding at least one succeeding instruction to be executed after a preceding instruction being executed by said corresponding resource means;
• and
• (b2) start means for starting execution of a succeeding instruction held by the instruction holding means at a timing dependent upon execution of a sequence of processing by said corresponding resource means on a preceding set of vector elements requested by the preceding instruction;
• (c) instruction transfer means connected to said plurality of execution start control means for transferring instructions thereto so that an instruction executable by one of said plurality of resource means is transferred to execution start control means corresponding to said one resource means, said instruction transfer means including select means for selecting one of the first and second resource means for which a forecast timing completion of execution of processing by the resource means for instructions already occupying the resource means is earlier than for the other of the first and second resource means so as to transfer the predetermined instruction to the selected resource means, the instructions already occupying the resource means including an instruction being executed thereby and an instruction being held by execution start control means corresponding thereto.

A data processor comprising:

• a plurality of resources for executing instructions;
• a plurality of instruction hold means corresponding to said resources, each of said plurality of instruction hold means holds instructions to be executed in a corresponding one of said resources;
• a plurality of execution start control means corresponding to said resources, each of said plurality of execution start control means independently causing a start of execution of a succeeding instruction, held in one of said plurality of instruction hold means corresponding to a particular one of said resources to which said each execution start control means corresponds, before the particular resource completes execution of a preceding instruction, execution of said preceding instruction having been already started by said each execution start control means;
• and
• instruction control means connected to said plurality of instruction hold means for transferring a series of instructions to be executed by said data processor to said plurality of instruction hold means, so that each of said instructions is transferred to one of said plurality of instruction hold means which is provided in correspondence to one of said plurality of resources which can execute said each instruction.

A data processor comprising:

• a plurality of resources for executing instructions, said each resource having pipelined stages for executing a sequence of processing required by an instruction in an overlapped manner;
• a plurality of instruction hold means corresponding to said resources, each of said plurality of instruction hold means holds instructions to be executed in a corresponding one of said resources;
• a plurality of execution start control means corresponding to said resources, each of said plurality of execution start control means independently causing a start of execution of a succeeding instruction, held in one of said plurality of instruction hold means corresponding to a particular one of said resources to which said each execution start control means corresponds, at a timing dependent upon execution of a sequence of processing required by a preceding instruction on said particular resource, execution of said preceding instruction having been already started by said each execution start control means;
• and
• instruction control means connected to said plurality of instruction hold means for transferring a series of instructions to be executed by said data processor to said plurality of instruction hold means, so that each of said instructions is transferred to one of said plurality of instruction hold means which is provided in correspondence to one of said plurality of resources which can execute said each instruction.