Enhanced wavetable processing technique on a vector processor having operand routing and slot selectable operations

A method for dynamically filtering an audio signal represented as an array of input values using a filter coefficient on a processor with a multimedia extension unit providing operand routing and slot selectable operations, said method comprising the steps of:

• (a) loading said input values into a vector register;
• (b) for each slot in said vector register:
• performing a multiply operation between said filter coefficient and said slot of said vector register and accumulating the result of the multiply operation in said slot of said vector register in a single clock cycle;
• and
• retaining the data of the remaining slots in said vector register in the same clock cycle;
• (c) saving the result of step (b);
• and
• (d) repeating steps (a) through (c) until said all input values in said array have been processed.

A method for panning an audio signal represented as an array of input values using an array of panning coefficients stored in a coefficient vector register on a multimedia extension unit providing operand routing and slot selectable operations, said method comprising the steps of:

• (a) loading said input values into a first vector register;
• (b) for each slot in said first vector register, performing a multiply operation between said first vector register and said coefficient vector register;
• and
• (c) saving the result of step (b);
• and
• (d) repeating steps (a) through (c) until said all input values in said array have been processed.

A computer system for interpolating an audio signal, the system comprising:

• a vector processing unit with vector operand routing and multiple operations per instruction;
• first means for loading said input values into first and second vector registers and fractional coefficients into a third vector register;
• second means for subtracting the first vector register from the second vector register wherein the result is stored in said second vector register;
• third means for, in a single operation, performing a vector multiply operation between said second and third vector registers and accumulating the result of the vector multiply operation in said second vector register;
• fourth means for saving the result of third means;
• and
• fifth means for repeating first through fourth means until said input values in said array have been processed.

A computer program product for controlling a vector processing unit, the program comprising:

• a computer readable medium;
• first means on said computer readable medium for loading said input values into first and second vector registers and fractional coefficients into a third vector register;
• second means on said computer readable medium for subtracting the first vector register from the second vector register, wherein the result is stored in said second vector register;
• third means on said computer readable medium for, in a single operation performing a vector multiply operation between said second and third vector registers and accumulating the result of the vector multiply operation in said second vector register;
• fourth means on said computer readable medium for saving the result of third means;
• and
• fifth means on said computer readable medium for repeating first through fourth means until said input values in said array have been processed.

A system for interpolating an audio signal represented as an array of input values in an audio system comprising:

• a processor;
• a multimedia extension unit coupled to the processor having operand routing and operation selection;
• an audio system;
• and
• a code segment for execution by said processor and said multimedia extension unit, said code segment including:
• (a) code for loading said input values into first and second vector registers and fractional coefficients into a third vector register;
• (b) code for subtracting the first vector register from the second vector register, wherein the result is stored in said second vector register;
• (c) code for, in a single operation, performing a vector multiply operation between said second and third vector registers and accumulating the result of the vector multiply operation in said second vector register;
• (d) code for saving the result of code segment (c);
• and
• (e) code for repeating code segments (a) through (d) until said all input values in said array have been processed.

A computer system for dynamically filtering an audio signal represented as an array of input values, the system comprising:

• a vector processing unit with vector operand routing and multiple operations per instruction;
• first means for loading said input values into a vector register;
• second means for in each slot in said vector register, having:
• means for performing a multiply operation between a filter coefficient and said slot of said vector register and accumulating the result of the multiply operation in said slot of said vector register in a single clock cycle;
• and
• means for retaining the data of the remaining slots in said vector register in the same clock cycle;
• third means for saving the result of said second means;
• and
• fourth means for repeating said first through third means until said all input values in said array have been processed.

A computer program product for controlling a vector processing unit, the program comprising:

• a computer readable medium;
• first means on said computer readable medium for loading said input values into a vector register;
• second means on said computer readable medium for, in each slot in said vector register performing a multiply operation between a filter coefficient and said slot of said vector register and accumulating the result of the multiply operation in said slot of said vector register in a single clock cycle and for retaining the data of the remaining slots in said vector register in the same clock cycle;
• third means on said computer readable medium for saving the result of said second means;
• and
• fourth means on said computer readable medium for repeating said first through third means until said all input values in said array have been processed.

A system for dynamically filtering an audio signal in an audio system comprising:

• a processor;
• a multimedia extension unit coupled to the processor having operand routing and operation selection;
• an audio system;
• and
• a code segment for execution by said processor and said multimedia extension unit, said code segment including:
• (a) code segment for loading said input values into a vector register;
• (b) a code segment for, in each slot in said vector register, performing a multiply operation between a filter coefficient and said slot of said vector register and accumulating the result of the multiply operation in said slot of said vector register in a single clock cycle, and retaining the data of the remaining slots in said vector register in the same clock cycle;
• (c) code segment for saving the result of code segment (b);
• and
• (d) code segment for repeating code segments (a) through (c) until said all input values in said array have been processed.

A computer system for panning an audio signal, the system comprising:

• a vector processing unit with vector operand routing and multiple operations per instruction;
• first means for loading said input values into a first vector register;
• second means having for each slot in said first vector register, means for performing a multiply operation between said first vector register and a coefficient vector register;
• third means for saving the result of said second means;
• and
• fourth means for repeating said first through third means until said all input values in said array have been processed.

A computer program product for controlling a vector processing unit, the program comprising:

• a computer readable medium;
• first means on said computer readable medium for loading said input values into a first vector register;
• second means on said computer readable medium for, in each slot in said first vector register, performing a multiply operation between said first vector register and a coefficient vector register;
• third means on said computer readable medium for saving the result of said second means;
• and
• fourth means on said computer readable medium for repeating said first through third means until said all input values in said array have been processed.

A system for interpolating an audio signal in an audio system comprising:

• a processor;
• a multimedia extension unit coupled to the processor having operand routing and operation selection;
• an audio system;
• and
• a code segment for execution by said processor and said multimedia extension unit, said code segment including:
• (a) code segment loading said input values into a first vector register;
• (b) code segment having for, in each slot in said first vector register, performing a multiply operation between said first vector register and a coefficient vector register;
• (c) code segment for saving the result of code segment (b);
• and
• (d) code segment for means for repeating code segments (a) through (c) until said all input values in said array have been processed.