Computer implemented method for providing a two dimensional rotation of packed data

摘要

In a computer system having stored therein a first and a second packed data having corresponding data elements, a method for generating a two dimensional rotation of said packed data. The method includes the steps of generating a first set of intermediate results in response to a first instruction by multiplying the data elements of the first packed data with corresponding elements of a third packed data. The elements of said third packed data represent either a sine or cosine function. A second step of generating a second set of intermediate results in response to a second instruction by multiplying the data elements of the second packed data with corresponding elements of a fourth packed data. The elements of the fourth packed data represent either a sine or cosine function. A third and final step of generating a set of final results in response to a third instruction by performing an arithmetic operation between corresponding elements of the first and second sets of intermediate results. The final results represent a two dimensional rotation of the elements of the first set of packed data.