SIMD arithmetic unit, arithmetic method of SIMD arithmetic unit, arithmetic processing unit and compiler

摘要

PPROBLEM TO BE SOLVED: To execute a high-speed Dekker's algorithm in SIMD computing. PSOLUTION: The arithmetic processing unit includes: a compiler which compiles a program using addition errors; a storage means which stores a plurality of instructions from the compiler; and the computing unit which executes a plurality of operations by single command multiple data (SIMD) method based on an instruction read from the storage means. The computing unit includes a register for SIMD, which has a first register group and a second register group each of which comprises a plurality of registers; and a computing means which computes two input values input from the first register group and the second register group based on the SIMD method. The computing means includes a first computing means which compares the absolute values of the two input values and outputs the value with the larger or equal absolute value as the first value; and a second computing means which compares the absolute values of the two input values, and outputs the value with the smaller or equal absolute value as the second value, and a third computing means which executes addition and subtraction by using the first and second values. PCOPYRIGHT: (C)2010,JPO&INPIT