Information processing apparatus for determining sequence of parallel executing instructions in response to storage requirements thereof

An information processing apparatus for executing a plurality of instructions in parallel comprising:

• storage means for storing operands;
• a group of registers;
• operation means connected to said storage means and said registers;
• means for sequentially decoding supplied instructions and for providing decoded information;
• first detection means, connected to said decoding means and responsive to decoding of a first instruction requesting read-out of an operand from an address of said storage means, for detecting a second instruction among instructions in execution using decoded information of the instructions in execution and decoded information of the first instruction, the second instruction being an instruction requesting reading of an operand from one of said registers and writing of the operand to be read, into said addres of said storage means without implementing an operation on the operand to be read;
• and
• instruction execution control means connected to said decoding means and said first detection means for controlling execution of decoded instructions, including means responsive to the detection of said second instruction for reading out an operand from one of the registers specified by said second instruction as an operand for the first instruction before the execution of said second instruction has been completed, in place of reading out an operand from said address of said storage means requested by said first instruction.